Adding upstream version 3.1.0.

Signed-off-by: Daniel Baumann <daniel@debian.org>

.github/ISSUE_TEMPLATE/00_bug.yaml

@@ -16,6 +16,12 @@ body:
       placeholder: ...
     validations:
       required: true
+  - type: markdown
+    attributes:
+      value: |
+        95% of issues created are duplicates.
+        please try extra hard to find them first.
+        it's very unlikely your problem is unique.
   - type: textarea
     id: freeform
     attributes:

.github/ISSUE_TEMPLATE/01_feature.yaml

@@ -0,0 +1,38 @@
+name: feature request
+description: something new
+body:
+  - type: markdown
+    attributes:
+      value: |
+         this is for issues for `pre-commit` (the framework).
+         if you are reporting an issue for [pre-commit.ci] please report it at [pre-commit-ci/issues]
+
+         [pre-commit.ci]: https://pre-commit.ci
+         [pre-commit-ci/issues]: https://github.com/pre-commit-ci/issues
+  - type: input
+    id: search
+    attributes:
+      label: search you tried in the issue tracker
+      placeholder: ...
+    validations:
+      required: true
+  - type: markdown
+    attributes:
+      value: |
+        95% of issues created are duplicates.
+        please try extra hard to find them first.
+        it's very unlikely your feature idea is a new one.
+  - type: textarea
+    id: freeform
+    attributes:
+      label: describe your actual problem
+      placeholder: 'I want to do ... I tried ... It does not work because ...'
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: pre-commit --version
+      placeholder: pre-commit x.x.x
+    validations:
+      required: true

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+- name: documentation
+  url: https://pre-commit.com
+  about: please check the docs first
+- name: pre-commit.ci issues
+  url: https://github.com/pre-commit-ci/issues
+  about: please report issues about pre-commit.ci here

.github/actions/pre-test/action.yml

@@ -5,36 +5,5 @@ inputs:
 runs:
   using: composite
   steps:
-  - name: setup (windows)
-    shell: bash
-    if: runner.os == 'Windows'
-    run: |
-      set -x
-
-      echo 'TEMP=C:\TEMP' >> "$GITHUB_ENV"
-
-      echo "$CONDA\Scripts" >> "$GITHUB_PATH"
-
-      echo 'C:\Strawberry\perl\bin' >> "$GITHUB_PATH"
-      echo 'C:\Strawberry\perl\site\bin' >> "$GITHUB_PATH"
-      echo 'C:\Strawberry\c\bin' >> "$GITHUB_PATH"
-
-      testing/get-coursier.sh
-      testing/get-dart.sh
-  - name: setup (linux)
-    shell: bash
-    if: runner.os == 'Linux'
-    run: |
-      set -x
-
-      sudo apt-get update
-      sudo apt-get install -y --no-install-recommends \
-        lua5.3 \
-        liblua5.3-dev \
-        luarocks
-
-      testing/get-coursier.sh
-      testing/get-dart.sh
-      testing/get-swift.sh
   - uses: asottile/workflows/.github/actions/latest-git@v1.4.0
     if: inputs.env == 'py38' && runner.os == 'Linux'

.github/workflows/languages.yaml

@@ -0,0 +1,82 @@
+name: languages
+
+on:
+  push:
+    branches: [main, test-me-*]
+    tags:
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  vars:
+    runs-on: ubuntu-latest
+    outputs:
+      languages: ${{ steps.vars.outputs.languages }}
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-python@v4
+      with:
+        python-version: 3.8
+    - name: install deps
+      run: python -mpip install -e . -r requirements-dev.txt
+    - name: vars
+      run: testing/languages ${{ github.event_name == 'push' && '--all' || '' }}
+      id: vars
+  language:
+    needs: [vars]
+    runs-on: ${{ matrix.os }}
+    if: needs.vars.outputs.languages != '[]'
+    strategy:
+      fail-fast: false
+      matrix:
+        include: ${{ fromJSON(needs.vars.outputs.languages) }}
+    steps:
+    - uses: asottile/workflows/.github/actions/fast-checkout@v1.4.0
+    - uses: actions/setup-python@v4
+      with:
+        python-version: 3.8
+
+    - run: echo "$CONDA\Scripts" >> "$GITHUB_PATH"
+      shell: bash
+      if: matrix.os == 'windows-latest' && matrix.language == 'conda'
+    - run: testing/get-coursier.sh
+      shell: bash
+      if: matrix.language == 'coursier'
+    - run: testing/get-dart.sh
+      shell: bash
+      if: matrix.language == 'dart'
+    - run: |
+        sudo apt-get update
+        sudo apt-get install -y --no-install-recommends \
+          lua5.3 \
+          liblua5.3-dev \
+          luarocks
+      if: matrix.os == 'ubuntu-latest' && matrix.language == 'lua'
+    - run: |
+        echo 'C:\Strawberry\perl\bin' >> "$GITHUB_PATH"
+        echo 'C:\Strawberry\perl\site\bin' >> "$GITHUB_PATH"
+        echo 'C:\Strawberry\c\bin' >> "$GITHUB_PATH"
+      shell: bash
+      if: matrix.os == 'windows-latest' && matrix.language == 'perl'
+    - run: testing/get-swift.sh
+      if: matrix.os == 'ubuntu-latest' && matrix.language == 'swift'
+
+    - name: install deps
+      run: python -mpip install -e . -r requirements-dev.txt
+    - name: run tests
+      run: coverage run -m pytest tests/languages/${{ matrix.language }}_test.py
+    - name: check coverage
+      run: coverage report --include pre_commit/languages/${{ matrix.language }}.py,tests/languages/${{ matrix.language }}_test.py
+  collector:
+    needs: [language]
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+    - name: check for failures
+      if: contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled')
+      run: echo job failed && exit 1

.pre-commit-config.yaml

@@ -38,7 +38,7 @@ repos:
     hooks:
     -   id: flake8
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.991
+    rev: v1.0.1
     hooks:
     -   id: mypy
         additional_dependencies: [types-all]

CHANGELOG.md

@@ -1,3 +1,21 @@
+3.1.0 - 2023-02-22
+==================
+
+### Fixes
+- Fix `dotnet` for `.sln`-based hooks for dotnet>=7.0.200.
+    - #2763 PR by @m-rsha.
+- Prevent stashing when `diff` fails to execute.
+    - #2774 PR by @asottile.
+    - #2773 issue by @strubbly.
+- Dependencies are no longer sorted in repository key.
+    - #2776 PR by @asottile.
+
+### Updating
+- Deprecate `language: python_venv`.  Use `language: python` instead.
+    - #2746 PR by @asottile.
+    - #2734 issue by @asottile.
+
+
 3.0.4 - 2023-02-03
 ==================
 

CONTRIBUTING.md

@@ -64,10 +64,10 @@ to implement.  The current implemented languages are at varying levels:
 - 0th class - pre-commit does not require any dependencies for these languages
   as they're not actually languages (current examples: fail, pygrep)
 - 1st class - pre-commit will bootstrap a full interpreter requiring nothing to
-  be installed globally (current examples: node, ruby, rust)
+  be installed globally (current examples: go, node, ruby, rust)
 - 2nd class - pre-commit requires the user to install the language globally but
-  will install tools in an isolated fashion (current examples: python, go,
+  will install tools in an isolated fashion (current examples: python, swift,
-  swift, docker).
+  docker).
 - 3rd class - pre-commit requires the user to install both the tool and the
   language globally (current examples: script, system)
 

pre_commit/all_languages.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+from pre_commit.lang_base import Language
+from pre_commit.languages import conda
+from pre_commit.languages import coursier
+from pre_commit.languages import dart
+from pre_commit.languages import docker
+from pre_commit.languages import docker_image
+from pre_commit.languages import dotnet
+from pre_commit.languages import fail
+from pre_commit.languages import golang
+from pre_commit.languages import lua
+from pre_commit.languages import node
+from pre_commit.languages import perl
+from pre_commit.languages import pygrep
+from pre_commit.languages import python
+from pre_commit.languages import r
+from pre_commit.languages import ruby
+from pre_commit.languages import rust
+from pre_commit.languages import script
+from pre_commit.languages import swift
+from pre_commit.languages import system
+
+
+languages: dict[str, Language] = {
+    'conda': conda,
+    'coursier': coursier,
+    'dart': dart,
+    'docker': docker,
+    'docker_image': docker_image,
+    'dotnet': dotnet,
+    'fail': fail,
+    'golang': golang,
+    'lua': lua,
+    'node': node,
+    'perl': perl,
+    'pygrep': pygrep,
+    'python': python,
+    'r': r,
+    'ruby': ruby,
+    'rust': rust,
+    'script': script,
+    'swift': swift,
+    'system': system,
+    # TODO: fully deprecate `python_venv`
+    'python_venv': python,
+}
+language_names = sorted(languages)

pre_commit/clientlib.py

@@ -12,8 +12,8 @@ import cfgv
 from identify.identify import ALL_TAGS
 
 import pre_commit.constants as C
+from pre_commit.all_languages import language_names
 from pre_commit.errors import FatalError
-from pre_commit.languages.all import all_languages
 from pre_commit.yaml import yaml_load
 
 logger = logging.getLogger('pre_commit')
@@ -49,7 +49,7 @@ MANIFEST_HOOK_DICT = cfgv.Map(
     cfgv.Required('id', cfgv.check_string),
     cfgv.Required('name', cfgv.check_string),
     cfgv.Required('entry', cfgv.check_string),
-    cfgv.Required('language', cfgv.check_one_of(all_languages)),
+    cfgv.Required('language', cfgv.check_one_of(language_names)),
     cfgv.Optional('alias', cfgv.check_string, ''),
 
     cfgv.Optional('files', check_string_regex, ''),
@@ -281,8 +281,8 @@ CONFIG_REPO_DICT = cfgv.Map(
 )
 DEFAULT_LANGUAGE_VERSION = cfgv.Map(
     'DefaultLanguageVersion', None,
-    cfgv.NoAdditionalKeys(all_languages),
+    cfgv.NoAdditionalKeys(language_names),
-    *(cfgv.Optional(x, cfgv.check_string, C.DEFAULT) for x in all_languages),
+    *(cfgv.Optional(x, cfgv.check_string, C.DEFAULT) for x in language_names),
 )
 CONFIG_SCHEMA = cfgv.Map(
     'Config', None,

pre_commit/commands/migrate_config.py

@@ -42,6 +42,14 @@ def _migrate_sha_to_rev(contents: str) -> str:
     return re.sub(r'(\n\s+)sha:', r'\1rev:', contents)
 
 
+def _migrate_python_venv(contents: str) -> str:
+    return re.sub(
+        r'(\n\s+)language: python_venv\b',
+        r'\1language: python',
+        contents,
+    )
+
+
 def migrate_config(config_file: str, quiet: bool = False) -> int:
     with open(config_file) as f:
         orig_contents = contents = f.read()
@@ -55,6 +63,7 @@ def migrate_config(config_file: str, quiet: bool = False) -> int:
 
     contents = _migrate_map(contents)
     contents = _migrate_sha_to_rev(contents)
+    contents = _migrate_python_venv(contents)
 
     if contents != orig_contents:
         with open(config_file, 'w') as f:

pre_commit/commands/run.py

@@ -19,9 +19,9 @@ from identify.identify import tags_from_path
 from pre_commit import color
 from pre_commit import git
 from pre_commit import output
+from pre_commit.all_languages import languages
 from pre_commit.clientlib import load_config
 from pre_commit.hook import Hook
-from pre_commit.languages.all import languages
 from pre_commit.repository import all_hooks
 from pre_commit.repository import install_hook_envs
 from pre_commit.staged_files_only import staged_files_only

pre_commit/lang_base.py

@@ -7,8 +7,10 @@ import random
 import re
 import shlex
 from typing import Any
+from typing import ContextManager
 from typing import Generator
 from typing import NoReturn
+from typing import Protocol
 from typing import Sequence
 
 import pre_commit.constants as C
@@ -22,6 +24,42 @@ FIXED_RANDOM_SEED = 1542676187
 SHIMS_RE = re.compile(r'[/\\]shims[/\\]')
 
 
+class Language(Protocol):
+    # Use `None` for no installation / environment
+    @property
+    def ENVIRONMENT_DIR(self) -> str | None: ...
+    # return a value to replace `'default` for `language_version`
+    def get_default_version(self) -> str: ...
+    # return whether the environment is healthy (or should be rebuilt)
+    def health_check(self, prefix: Prefix, version: str) -> str | None: ...
+
+    # install a repository for the given language and language_version
+    def install_environment(
+            self,
+            prefix: Prefix,
+            version: str,
+            additional_dependencies: Sequence[str],
+    ) -> None:
+        ...
+
+    # modify the environment for hook execution
+    def in_env(self, prefix: Prefix, version: str) -> ContextManager[None]: ...
+
+    # execute a hook and return the exit code and output
+    def run_hook(
+            self,
+            prefix: Prefix,
+            entry: str,
+            args: Sequence[str],
+            file_args: Sequence[str],
+            *,
+            is_local: bool,
+            require_serial: bool,
+            color: bool,
+    ) -> tuple[int, bytes]:
+        ...
+
+
 def exe_exists(exe: str) -> bool:
     found = parse_shebang.find_executable(exe)
     if found is None:  # exe exists
@@ -45,7 +83,7 @@ def exe_exists(exe: str) -> bool:
     )
 
 
-def run_setup_cmd(prefix: Prefix, cmd: tuple[str, ...], **kwargs: Any) -> None:
+def setup_cmd(prefix: Prefix, cmd: tuple[str, ...], **kwargs: Any) -> None:
     cmd_output_b(*cmd, cwd=prefix.prefix_dir, **kwargs)
 
 

pre_commit/languages/all.py

@@ -1,99 +0,0 @@
-from __future__ import annotations
-
-from typing import ContextManager
-from typing import Protocol
-from typing import Sequence
-
-from pre_commit.languages import conda
-from pre_commit.languages import coursier
-from pre_commit.languages import dart
-from pre_commit.languages import docker
-from pre_commit.languages import docker_image
-from pre_commit.languages import dotnet
-from pre_commit.languages import fail
-from pre_commit.languages import golang
-from pre_commit.languages import lua
-from pre_commit.languages import node
-from pre_commit.languages import perl
-from pre_commit.languages import pygrep
-from pre_commit.languages import python
-from pre_commit.languages import r
-from pre_commit.languages import ruby
-from pre_commit.languages import rust
-from pre_commit.languages import script
-from pre_commit.languages import swift
-from pre_commit.languages import system
-from pre_commit.prefix import Prefix
-
-
-class Language(Protocol):
-    # Use `None` for no installation / environment
-    @property
-    def ENVIRONMENT_DIR(self) -> str | None: ...
-    # return a value to replace `'default` for `language_version`
-    def get_default_version(self) -> str: ...
-
-    # return whether the environment is healthy (or should be rebuilt)
-    def health_check(
-            self,
-            prefix: Prefix,
-            language_version: str,
-    ) -> str | None:
-        ...
-
-    # install a repository for the given language and language_version
-    def install_environment(
-            self,
-            prefix: Prefix,
-            version: str,
-            additional_dependencies: Sequence[str],
-    ) -> None:
-        ...
-
-    # modify the environment for hook execution
-    def in_env(
-            self,
-            prefix: Prefix,
-            version: str,
-    ) -> ContextManager[None]:
-        ...
-
-    # execute a hook and return the exit code and output
-    def run_hook(
-            self,
-            prefix: Prefix,
-            entry: str,
-            args: Sequence[str],
-            file_args: Sequence[str],
-            *,
-            is_local: bool,
-            require_serial: bool,
-            color: bool,
-    ) -> tuple[int, bytes]:
-        ...
-
-
-languages: dict[str, Language] = {
-    'conda': conda,
-    'coursier': coursier,
-    'dart': dart,
-    'docker': docker,
-    'docker_image': docker_image,
-    'dotnet': dotnet,
-    'fail': fail,
-    'golang': golang,
-    'lua': lua,
-    'node': node,
-    'perl': perl,
-    'pygrep': pygrep,
-    'python': python,
-    'r': r,
-    'ruby': ruby,
-    'rust': rust,
-    'script': script,
-    'swift': swift,
-    'system': system,
-    # TODO: fully deprecate `python_venv`
-    'python_venv': python,
-}
-all_languages = sorted(languages)

pre_commit/languages/conda.py

@@ -5,19 +5,19 @@ import os
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import SubstitutionT
 from pre_commit.envcontext import UNSET
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output_b
 
 ENVIRONMENT_DIR = 'conda'
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def get_env_patch(env: str) -> PatchesT:
@@ -41,7 +41,7 @@ def get_env_patch(env: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -60,11 +60,11 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    helpers.assert_version_default('conda', version)
+    lang_base.assert_version_default('conda', version)
 
     conda_exe = _conda_exe()
 
-    env_dir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    env_dir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     cmd_output_b(
         conda_exe, 'env', 'create', '-p', env_dir, '--file',
         'environment.yml', cwd=prefix.prefix_dir,

pre_commit/languages/coursier.py

@@ -5,19 +5,19 @@ import os.path
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
 from pre_commit.errors import FatalError
-from pre_commit.languages import helpers
 from pre_commit.parse_shebang import find_executable
 from pre_commit.prefix import Prefix
 
 ENVIRONMENT_DIR = 'coursier'
 
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def install_environment(
@@ -25,7 +25,7 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    helpers.assert_version_default('coursier', version)
+    lang_base.assert_version_default('coursier', version)
 
     # Support both possible executable names (either "cs" or "coursier")
     cs = find_executable('cs') or find_executable('coursier')
@@ -35,12 +35,12 @@ def install_environment(
             'executables in the application search path',
         )
 
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     def _install(*opts: str) -> None:
         assert cs is not None
-        helpers.run_setup_cmd(prefix, (cs, 'fetch', *opts))
+        lang_base.setup_cmd(prefix, (cs, 'fetch', *opts))
-        helpers.run_setup_cmd(prefix, (cs, 'install', '--dir', envdir, *opts))
+        lang_base.setup_cmd(prefix, (cs, 'install', '--dir', envdir, *opts))
 
     with in_env(prefix, version):
         channel = prefix.path('.pre-commit-channel')
@@ -71,6 +71,6 @@ def get_env_patch(target_dir: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield

pre_commit/languages/dart.py

@@ -7,19 +7,19 @@ import tempfile
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import win_exe
 from pre_commit.yaml import yaml_load
 
 ENVIRONMENT_DIR = 'dartenv'
 
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def get_env_patch(venv: str) -> PatchesT:
@@ -30,7 +30,7 @@ def get_env_patch(venv: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -40,9 +40,9 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    helpers.assert_version_default('dart', version)
+    lang_base.assert_version_default('dart', version)
 
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     bin_dir = os.path.join(envdir, 'bin')
 
     def _install_dir(prefix_p: Prefix, pub_cache: str) -> None:
@@ -51,10 +51,10 @@ def install_environment(
         with open(prefix_p.path('pubspec.yaml')) as f:
             pubspec_contents = yaml_load(f)
 
-        helpers.run_setup_cmd(prefix_p, ('dart', 'pub', 'get'), env=dart_env)
+        lang_base.setup_cmd(prefix_p, ('dart', 'pub', 'get'), env=dart_env)
 
         for executable in pubspec_contents['executables']:
-            helpers.run_setup_cmd(
+            lang_base.setup_cmd(
                 prefix_p,
                 (
                     'dart', 'compile', 'exe',
@@ -77,7 +77,7 @@ def install_environment(
             else:
                 dep_cmd = (dep,)
 
-            helpers.run_setup_cmd(
+            lang_base.setup_cmd(
                 prefix,
                 ('dart', 'pub', 'cache', 'add', *dep_cmd),
                 env={**os.environ, 'PUB_CACHE': dep_tmp},

pre_commit/languages/docker.py

@@ -5,16 +5,16 @@ import json
 import os
 from typing import Sequence
 
-from pre_commit.languages import helpers
+from pre_commit import lang_base
 from pre_commit.prefix import Prefix
 from pre_commit.util import CalledProcessError
 from pre_commit.util import cmd_output_b
 
 ENVIRONMENT_DIR = 'docker'
 PRE_COMMIT_LABEL = 'PRE_COMMIT'
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-in_env = helpers.no_env  # no special environment for docker
+in_env = lang_base.no_env  # no special environment for docker
 
 
 def _is_in_docker() -> bool:
@@ -84,16 +84,16 @@ def build_docker_image(
         cmd += ('--pull',)
     # This must come last for old versions of docker.  See #477
     cmd += ('.',)
-    helpers.run_setup_cmd(prefix, cmd)
+    lang_base.setup_cmd(prefix, cmd)
 
 
 def install_environment(
         prefix: Prefix, version: str, additional_dependencies: Sequence[str],
 ) -> None:  # pragma: win32 no cover
-    helpers.assert_version_default('docker', version)
+    lang_base.assert_version_default('docker', version)
-    helpers.assert_no_additional_deps('docker', additional_dependencies)
+    lang_base.assert_no_additional_deps('docker', additional_dependencies)
 
-    directory = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    directory = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     # Docker doesn't really have relevant disk environment, but pre-commit
     # still needs to cleanup its state files on failure
@@ -135,12 +135,11 @@ def run_hook(
     # automated cleanup of docker images.
     build_docker_image(prefix, pull=False)
 
-    entry_exe, *cmd_rest = helpers.hook_cmd(entry, args)
+    entry_exe, *cmd_rest = lang_base.hook_cmd(entry, args)
 
     entry_tag = ('--entrypoint', entry_exe, docker_tag(prefix))
-    cmd = (*docker_cmd(), *entry_tag, *cmd_rest)
+    return lang_base.run_xargs(
-    return helpers.run_xargs(
+        (*docker_cmd(), *entry_tag, *cmd_rest),
-        cmd,
         file_args,
         require_serial=require_serial,
         color=color,

pre_commit/languages/docker_image.py

@@ -2,15 +2,15 @@ from __future__ import annotations
 
 from typing import Sequence
 
-from pre_commit.languages import helpers
+from pre_commit import lang_base
 from pre_commit.languages.docker import docker_cmd
 from pre_commit.prefix import Prefix
 
 ENVIRONMENT_DIR = None
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-install_environment = helpers.no_install
+install_environment = lang_base.no_install
-in_env = helpers.no_env
+in_env = lang_base.no_env
 
 
 def run_hook(
@@ -23,8 +23,8 @@ def run_hook(
         require_serial: bool,
         color: bool,
 ) -> tuple[int, bytes]:  # pragma: win32 no cover
-    cmd = docker_cmd() + helpers.hook_cmd(entry, args)
+    cmd = docker_cmd() + lang_base.hook_cmd(entry, args)
-    return helpers.run_xargs(
+    return lang_base.run_xargs(
         cmd,
         file_args,
         require_serial=require_serial,

pre_commit/languages/dotnet.py

@@ -9,18 +9,18 @@ import zipfile
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 
 ENVIRONMENT_DIR = 'dotnetenv'
 BIN_DIR = 'bin'
 
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def get_env_patch(venv: str) -> PatchesT:
@@ -31,7 +31,7 @@ def get_env_patch(venv: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -57,19 +57,19 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    helpers.assert_version_default('dotnet', version)
+    lang_base.assert_version_default('dotnet', version)
-    helpers.assert_no_additional_deps('dotnet', additional_dependencies)
+    lang_base.assert_no_additional_deps('dotnet', additional_dependencies)
 
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
-    build_dir = 'pre-commit-build'
+    build_dir = prefix.path('pre-commit-build')
 
     # Build & pack nupkg file
-    helpers.run_setup_cmd(
+    lang_base.setup_cmd(
         prefix,
         (
             'dotnet', 'pack',
             '--configuration', 'Release',
-            '--output', build_dir,
+            '--property', f'PackageOutputPath={build_dir}',
         ),
     )
 
@@ -99,7 +99,7 @@ def install_environment(
 
         # Install to bin dir
         with _nuget_config_no_sources() as nuget_config:
-            helpers.run_setup_cmd(
+            lang_base.setup_cmd(
                 prefix,
                 (
                     'dotnet', 'tool', 'install',
@@ -109,7 +109,3 @@ def install_environment(
                     tool_id,
                 ),
             )
-
-    # Clean the git dir, ignoring the environment dir
-    clean_cmd = ('git', 'clean', '-ffxd', '-e', f'{ENVIRONMENT_DIR}-*')
-    helpers.run_setup_cmd(prefix, clean_cmd)

pre_commit/languages/fail.py

@@ -2,14 +2,14 @@ from __future__ import annotations
 
 from typing import Sequence
 
-from pre_commit.languages import helpers
+from pre_commit import lang_base
 from pre_commit.prefix import Prefix
 
 ENVIRONMENT_DIR = None
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-install_environment = helpers.no_install
+install_environment = lang_base.no_install
-in_env = helpers.no_env
+in_env = lang_base.no_env
 
 
 def run_hook(

pre_commit/languages/golang.py

@@ -19,17 +19,17 @@ from typing import Protocol
 from typing import Sequence
 
 import pre_commit.constants as C
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output
 from pre_commit.util import rmtree
 
 ENVIRONMENT_DIR = 'golangenv'
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 _ARCH_ALIASES = {
     'x86_64': 'amd64',
@@ -60,7 +60,7 @@ else:  # pragma: win32 no cover
 
 @functools.lru_cache(maxsize=1)
 def get_default_version() -> str:
-    if helpers.exe_exists('go'):
+    if lang_base.exe_exists('go'):
         return 'system'
     else:
         return C.DEFAULT
@@ -121,7 +121,7 @@ def _install_go(version: str, dest: str) -> None:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir, version)):
         yield
 
@@ -131,7 +131,7 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    env_dir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    env_dir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     if version != 'system':
         _install_go(version, env_dir)
@@ -149,9 +149,9 @@ def install_environment(
             os.path.join(env_dir, '.go', 'bin'), os.environ['PATH'],
         ))
 
-    helpers.run_setup_cmd(prefix, ('go', 'install', './...'), env=env)
+    lang_base.setup_cmd(prefix, ('go', 'install', './...'), env=env)
     for dependency in additional_dependencies:
-        helpers.run_setup_cmd(prefix, ('go', 'install', dependency), env=env)
+        lang_base.setup_cmd(prefix, ('go', 'install', dependency), env=env)
 
     # save some disk space -- we don't need this after installation
     pkgdir = os.path.join(env_dir, 'pkg')

pre_commit/languages/lua.py

@@ -6,17 +6,17 @@ import sys
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output
 
 ENVIRONMENT_DIR = 'lua_env'
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def _get_lua_version() -> str:  # pragma: win32 no cover
@@ -45,7 +45,7 @@ def get_env_patch(d: str) -> PatchesT:  # pragma: win32 no cover
 
 @contextlib.contextmanager  # pragma: win32 no cover
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -55,9 +55,9 @@ def install_environment(
     version: str,
     additional_dependencies: Sequence[str],
 ) -> None:  # pragma: win32 no cover
-    helpers.assert_version_default('lua', version)
+    lang_base.assert_version_default('lua', version)
 
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with in_env(prefix, version):
         # luarocks doesn't bootstrap a tree prior to installing
         # so ensure the directory exists.
@@ -66,10 +66,10 @@ def install_environment(
         # Older luarocks (e.g., 2.4.2) expect the rockspec as an arg
         for rockspec in prefix.star('.rockspec'):
             make_cmd = ('luarocks', '--tree', envdir, 'make', rockspec)
-            helpers.run_setup_cmd(prefix, make_cmd)
+            lang_base.setup_cmd(prefix, make_cmd)
 
         # luarocks can't install multiple packages at once
         # so install them individually.
         for dependency in additional_dependencies:
             cmd = ('luarocks', '--tree', envdir, 'install', dependency)
-            helpers.run_setup_cmd(prefix, cmd)
+            lang_base.setup_cmd(prefix, cmd)

pre_commit/languages/node.py

@@ -8,11 +8,11 @@ from typing import Generator
 from typing import Sequence
 
 import pre_commit.constants as C
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import UNSET
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.languages.python import bin_dir
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output
@@ -20,7 +20,7 @@ from pre_commit.util import cmd_output_b
 from pre_commit.util import rmtree
 
 ENVIRONMENT_DIR = 'node_env'
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 @functools.lru_cache(maxsize=1)
@@ -30,7 +30,7 @@ def get_default_version() -> str:
         return C.DEFAULT
     # if node is already installed, we can save a bunch of setup time by
     # using the installed version
-    elif all(helpers.exe_exists(exe) for exe in ('node', 'npm')):
+    elif all(lang_base.exe_exists(exe) for exe in ('node', 'npm')):
         return 'system'
     else:
         return C.DEFAULT
@@ -60,13 +60,13 @@ def get_env_patch(venv: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
 
-def health_check(prefix: Prefix, language_version: str) -> str | None:
+def health_check(prefix: Prefix, version: str) -> str | None:
-    with in_env(prefix, language_version):
+    with in_env(prefix, version):
         retcode, _, _ = cmd_output_b('node', '--version', check=False)
         if retcode != 0:  # pragma: win32 no cover
             return f'`node --version` returned {retcode}'
@@ -78,7 +78,7 @@ def install_environment(
         prefix: Prefix, version: str, additional_dependencies: Sequence[str],
 ) -> None:
     assert prefix.exists('package.json')
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     # https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx?f=255&MSPPError=-2147217396#maxpath
     if sys.platform == 'win32':  # pragma: no cover
@@ -96,13 +96,13 @@ def install_environment(
             'npm', 'install', '--dev', '--prod',
             '--ignore-prepublish', '--no-progress', '--no-save',
         )
-        helpers.run_setup_cmd(prefix, local_install_cmd)
+        lang_base.setup_cmd(prefix, local_install_cmd)
 
         _, pkg, _ = cmd_output('npm', 'pack', cwd=prefix.prefix_dir)
         pkg = prefix.path(pkg.strip())
 
         install = ('npm', 'install', '-g', pkg, *additional_dependencies)
-        helpers.run_setup_cmd(prefix, install)
+        lang_base.setup_cmd(prefix, install)
 
         # clean these up after installation
         if prefix.exists('node_modules'):  # pragma: win32 no cover

pre_commit/languages/perl.py

@@ -6,16 +6,16 @@ import shlex
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 
 ENVIRONMENT_DIR = 'perl_env'
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def get_env_patch(venv: str) -> PatchesT:
@@ -34,7 +34,7 @@ def get_env_patch(venv: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -42,9 +42,9 @@ def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
 def install_environment(
         prefix: Prefix, version: str, additional_dependencies: Sequence[str],
 ) -> None:
-    helpers.assert_version_default('perl', version)
+    lang_base.assert_version_default('perl', version)
 
     with in_env(prefix, version):
-        helpers.run_setup_cmd(
+        lang_base.setup_cmd(
             prefix, ('cpan', '-T', '.', *additional_dependencies),
         )

pre_commit/languages/pygrep.py

@@ -7,16 +7,16 @@ from typing import NamedTuple
 from typing import Pattern
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit import output
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.xargs import xargs
 
 ENVIRONMENT_DIR = None
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-install_environment = helpers.no_install
+install_environment = lang_base.no_install
-in_env = helpers.no_env
+in_env = lang_base.no_env
 
 
 def _process_filename_by_line(pattern: Pattern[bytes], filename: str) -> int:

pre_commit/languages/python.py

@@ -8,11 +8,11 @@ from typing import Generator
 from typing import Sequence
 
 import pre_commit.constants as C
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import UNSET
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.parse_shebang import find_executable
 from pre_commit.prefix import Prefix
 from pre_commit.util import CalledProcessError
@@ -21,7 +21,7 @@ from pre_commit.util import cmd_output_b
 from pre_commit.util import win_exe
 
 ENVIRONMENT_DIR = 'py_env'
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 @functools.lru_cache(maxsize=None)
@@ -153,13 +153,13 @@ def norm_version(version: str) -> str | None:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
 
-def health_check(prefix: Prefix, language_version: str) -> str | None:
+def health_check(prefix: Prefix, version: str) -> str | None:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, language_version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     pyvenv_cfg = os.path.join(envdir, 'pyvenv.cfg')
 
     # created with "old" virtualenv
@@ -202,7 +202,7 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     venv_cmd = [sys.executable, '-mvirtualenv', envdir]
     python = norm_version(version)
     if python is not None:
@@ -211,4 +211,4 @@ def install_environment(
 
     cmd_output_b(*venv_cmd, cwd='/')
     with in_env(prefix, version):
-        helpers.run_setup_cmd(prefix, install_cmd)
+        lang_base.setup_cmd(prefix, install_cmd)

pre_commit/languages/r.py

@@ -7,18 +7,18 @@ import shutil
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import UNSET
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output_b
 from pre_commit.util import win_exe
 
 ENVIRONMENT_DIR = 'renv'
 RSCRIPT_OPTS = ('--no-save', '--no-restore', '--no-site-file', '--no-environ')
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
 
 
 def get_env_patch(venv: str) -> PatchesT:
@@ -30,7 +30,7 @@ def get_env_patch(venv: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -93,7 +93,7 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    env_dir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    env_dir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     os.makedirs(env_dir, exist_ok=True)
     shutil.copy(prefix.path('renv.lock'), env_dir)
     shutil.copytree(prefix.path('renv'), os.path.join(env_dir, 'renv'))
@@ -166,7 +166,7 @@ def run_hook(
         color: bool,
 ) -> tuple[int, bytes]:
     cmd = _cmd_from_hook(prefix, entry, args, is_local=is_local)
-    return helpers.run_xargs(
+    return lang_base.run_xargs(
         cmd,
         file_args,
         require_serial=require_serial,

pre_commit/languages/ruby.py

@@ -2,30 +2,35 @@ from __future__ import annotations
 
 import contextlib
 import functools
+import importlib.resources
 import os.path
 import shutil
 import tarfile
 from typing import Generator
+from typing import IO
 from typing import Sequence
 
 import pre_commit.constants as C
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import UNSET
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import CalledProcessError
-from pre_commit.util import resource_bytesio
 
 ENVIRONMENT_DIR = 'rbenv'
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
+
+
+def _resource_bytesio(filename: str) -> IO[bytes]:
+    return importlib.resources.open_binary('pre_commit.resources', filename)
 
 
 @functools.lru_cache(maxsize=1)
 def get_default_version() -> str:
-    if all(helpers.exe_exists(exe) for exe in ('ruby', 'gem')):
+    if all(lang_base.exe_exists(exe) for exe in ('ruby', 'gem')):
         return 'system'
     else:
         return C.DEFAULT
@@ -68,13 +73,13 @@ def get_env_patch(
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir, version)):
         yield
 
 
 def _extract_resource(filename: str, dest: str) -> None:
-    with resource_bytesio(filename) as bio:
+    with _resource_bytesio(filename) as bio:
         with tarfile.open(fileobj=bio) as tf:
             tf.extractall(dest)
 
@@ -83,7 +88,7 @@ def _install_rbenv(
         prefix: Prefix,
         version: str,
 ) -> None:  # pragma: win32 no cover
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     _extract_resource('rbenv.tar.gz', prefix.path('.'))
     shutil.move(prefix.path('rbenv'), envdir)
@@ -100,10 +105,10 @@ def _install_ruby(
         version: str,
 ) -> None:  # pragma: win32 no cover
     try:
-        helpers.run_setup_cmd(prefix, ('rbenv', 'download', version))
+        lang_base.setup_cmd(prefix, ('rbenv', 'download', version))
     except CalledProcessError:  # pragma: no cover (usually find with download)
         # Failed to download from mirror for some reason, build it instead
-        helpers.run_setup_cmd(prefix, ('rbenv', 'install', version))
+        lang_base.setup_cmd(prefix, ('rbenv', 'install', version))
 
 
 def install_environment(
@@ -114,17 +119,17 @@ def install_environment(
         with in_env(prefix, version):
             # Need to call this before installing so rbenv's directories
             # are set up
-            helpers.run_setup_cmd(prefix, ('rbenv', 'init', '-'))
+            lang_base.setup_cmd(prefix, ('rbenv', 'init', '-'))
             if version != C.DEFAULT:
                 _install_ruby(prefix, version)
             # Need to call this after installing to set up the shims
-            helpers.run_setup_cmd(prefix, ('rbenv', 'rehash'))
+            lang_base.setup_cmd(prefix, ('rbenv', 'rehash'))
 
     with in_env(prefix, version):
-        helpers.run_setup_cmd(
+        lang_base.setup_cmd(
             prefix, ('gem', 'build', *prefix.star('.gemspec')),
         )
-        helpers.run_setup_cmd(
+        lang_base.setup_cmd(
             prefix,
             (
                 'gem', 'install',

pre_commit/languages/rust.py

@@ -11,19 +11,19 @@ from typing import Generator
 from typing import Sequence
 
 import pre_commit.constants as C
+from pre_commit import lang_base
 from pre_commit import parse_shebang
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output_b
 from pre_commit.util import make_executable
 from pre_commit.util import win_exe
 
 ENVIRONMENT_DIR = 'rustenv'
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 @functools.lru_cache(maxsize=1)
@@ -63,7 +63,7 @@ def get_env_patch(target_dir: str, version: str) -> PatchesT:
 
 @contextlib.contextmanager
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir, version)):
         yield
 
@@ -78,7 +78,7 @@ def _add_dependencies(
         crate = f'{name}@{spec or "*"}'
         crates.append(crate)
 
-    helpers.run_setup_cmd(prefix, ('cargo', 'add', *crates))
+    lang_base.setup_cmd(prefix, ('cargo', 'add', *crates))
 
 
 def install_rust_with_toolchain(toolchain: str) -> None:
@@ -116,7 +116,7 @@ def install_environment(
         version: str,
         additional_dependencies: Sequence[str],
 ) -> None:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     # There are two cases where we might want to specify more dependencies:
     # as dependencies for the library being built, and as binary packages

pre_commit/languages/script.py

@@ -2,14 +2,14 @@ from __future__ import annotations
 
 from typing import Sequence
 
-from pre_commit.languages import helpers
+from pre_commit import lang_base
 from pre_commit.prefix import Prefix
 
 ENVIRONMENT_DIR = None
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-install_environment = helpers.no_install
+install_environment = lang_base.no_install
-in_env = helpers.no_env
+in_env = lang_base.no_env
 
 
 def run_hook(
@@ -22,9 +22,9 @@ def run_hook(
         require_serial: bool,
         color: bool,
 ) -> tuple[int, bytes]:
-    cmd = helpers.hook_cmd(entry, args)
+    cmd = lang_base.hook_cmd(entry, args)
     cmd = (prefix.path(cmd[0]), *cmd[1:])
-    return helpers.run_xargs(
+    return lang_base.run_xargs(
         cmd,
         file_args,
         require_serial=require_serial,

pre_commit/languages/swift.py

@@ -5,10 +5,10 @@ import os
 from typing import Generator
 from typing import Sequence
 
+from pre_commit import lang_base
 from pre_commit.envcontext import envcontext
 from pre_commit.envcontext import PatchesT
 from pre_commit.envcontext import Var
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import cmd_output_b
 
@@ -16,9 +16,9 @@ BUILD_DIR = '.build'
 BUILD_CONFIG = 'release'
 
 ENVIRONMENT_DIR = 'swift_env'
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook
 
 
 def get_env_patch(venv: str) -> PatchesT:  # pragma: win32 no cover
@@ -28,7 +28,7 @@ def get_env_patch(venv: str) -> PatchesT:  # pragma: win32 no cover
 
 @contextlib.contextmanager  # pragma: win32 no cover
 def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
     with envcontext(get_env_patch(envdir)):
         yield
 
@@ -36,9 +36,9 @@ def in_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
 def install_environment(
         prefix: Prefix, version: str, additional_dependencies: Sequence[str],
 ) -> None:  # pragma: win32 no cover
-    helpers.assert_version_default('swift', version)
+    lang_base.assert_version_default('swift', version)
-    helpers.assert_no_additional_deps('swift', additional_dependencies)
+    lang_base.assert_no_additional_deps('swift', additional_dependencies)
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     # Build the swift package
     os.mkdir(envdir)

pre_commit/languages/system.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
-from pre_commit.languages import helpers
+from pre_commit import lang_base
 
 ENVIRONMENT_DIR = None
-get_default_version = helpers.basic_get_default_version
+get_default_version = lang_base.basic_get_default_version
-health_check = helpers.basic_health_check
+health_check = lang_base.basic_health_check
-install_environment = helpers.no_install
+install_environment = lang_base.no_install
-in_env = helpers.no_env
+in_env = lang_base.no_env
-run_hook = helpers.basic_run_hook
+run_hook = lang_base.basic_run_hook

pre_commit/repository.py

@@ -3,17 +3,18 @@ from __future__ import annotations
 import json
 import logging
 import os
+import shlex
 from typing import Any
 from typing import Sequence
 
 import pre_commit.constants as C
+from pre_commit.all_languages import languages
 from pre_commit.clientlib import load_manifest
 from pre_commit.clientlib import LOCAL
 from pre_commit.clientlib import META
 from pre_commit.clientlib import parse_version
 from pre_commit.hook import Hook
-from pre_commit.languages.all import languages
+from pre_commit.lang_base import environment_dir
-from pre_commit.languages.helpers import environment_dir
 from pre_commit.prefix import Prefix
 from pre_commit.store import Store
 from pre_commit.util import clean_path_on_failure
@@ -32,7 +33,7 @@ def _state_filename_v2(venv: str) -> str:
 
 
 def _state(additional_deps: Sequence[str]) -> object:
-    return {'additional_dependencies': sorted(additional_deps)}
+    return {'additional_dependencies': additional_deps}
 
 
 def _read_state(venv: str) -> object | None:
@@ -68,6 +69,14 @@ def _hook_install(hook: Hook) -> None:
     logger.info('Once installed this environment will be reused.')
     logger.info('This may take a few minutes...')
 
+    if hook.language == 'python_venv':
+        logger.warning(
+            f'`repo: {hook.src}` uses deprecated `language: python_venv`.  '
+            f'This is an alias for `language: python`.  '
+            f'Often `pre-commit autoupdate --repo {shlex.quote(hook.src)}` '
+            f'will fix this.',
+        )
+
     lang = languages[hook.language]
     assert lang.ENVIRONMENT_DIR is not None
 

pre_commit/staged_files_only.py

@@ -7,6 +7,7 @@ import time
 from typing import Generator
 
 from pre_commit import git
+from pre_commit.errors import FatalError
 from pre_commit.util import CalledProcessError
 from pre_commit.util import cmd_output
 from pre_commit.util import cmd_output_b
@@ -49,12 +50,16 @@ def _intent_to_add_cleared() -> Generator[None, None, None]:
 @contextlib.contextmanager
 def _unstaged_changes_cleared(patch_dir: str) -> Generator[None, None, None]:
     tree = cmd_output('git', 'write-tree')[1].strip()
-    retcode, diff_stdout_binary, _ = cmd_output_b(
+    diff_cmd = (
         'git', 'diff-index', '--ignore-submodules', '--binary',
         '--exit-code', '--no-color', '--no-ext-diff', tree, '--',
-        check=False,
     )
-    if retcode and diff_stdout_binary.strip():
+    retcode, diff_stdout, diff_stderr = cmd_output_b(*diff_cmd, check=False)
+    if retcode == 0:
+        # There weren't any staged files so we don't need to do anything
+        # special
+        yield
+    elif retcode == 1 and diff_stdout.strip():
         patch_filename = f'patch{int(time.time())}-{os.getpid()}'
         patch_filename = os.path.join(patch_dir, patch_filename)
         logger.warning('Unstaged files detected.')
@@ -62,7 +67,7 @@ def _unstaged_changes_cleared(patch_dir: str) -> Generator[None, None, None]:
         # Save the current unstaged changes as a patch
         os.makedirs(patch_dir, exist_ok=True)
         with open(patch_filename, 'wb') as patch_file:
-            patch_file.write(diff_stdout_binary)
+            patch_file.write(diff_stdout)
 
         # prevent recursive post-checkout hooks (#1418)
         no_checkout_env = dict(os.environ, _PRE_COMMIT_SKIP_POST_CHECKOUT='1')
@@ -86,10 +91,12 @@ def _unstaged_changes_cleared(patch_dir: str) -> Generator[None, None, None]:
                 _git_apply(patch_filename)
 
             logger.info(f'Restored changes from {patch_filename}.')
-    else:
+    else:  # pragma: win32 no cover
-        # There weren't any staged files so we don't need to do anything
+        # some error occurred while requesting the diff
-        # special
+        e = CalledProcessError(retcode, diff_cmd, b'', diff_stderr)
-        yield
+        raise FatalError(
+            f'pre-commit failed to diff -- perhaps due to permissions?\n\n{e}',
+        )
 
 
 @contextlib.contextmanager

pre_commit/store.py

@@ -125,7 +125,7 @@ class Store:
     @classmethod
     def db_repo_name(cls, repo: str, deps: Sequence[str]) -> str:
         if deps:
-            return f'{repo}:{",".join(sorted(deps))}'
+            return f'{repo}:{",".join(deps)}'
         else:
             return repo
 

pre_commit/util.py

@@ -12,7 +12,6 @@ from types import TracebackType
 from typing import Any
 from typing import Callable
 from typing import Generator
-from typing import IO
 
 from pre_commit import parse_shebang
 
@@ -36,10 +35,6 @@ def clean_path_on_failure(path: str) -> Generator[None, None, None]:
         raise
 
 
-def resource_bytesio(filename: str) -> IO[bytes]:
-    return importlib.resources.open_binary('pre_commit.resources', filename)
-
-
 def resource_text(filename: str) -> str:
     return importlib.resources.read_text('pre_commit.resources', filename)
 
@@ -67,7 +62,7 @@ class CalledProcessError(RuntimeError):
     def __bytes__(self) -> bytes:
         def _indent_or_none(part: bytes | None) -> bytes:
             if part:
-                return b'\n    ' + part.replace(b'\n', b'\n    ')
+                return b'\n    ' + part.replace(b'\n', b'\n    ').rstrip()
             else:
                 return b' (none)'
 

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = pre_commit
-version = 3.0.4
+version = 3.1.0
 description = A framework for managing and maintaining multi-language pre-commit hooks.
 long_description = file: README.md
 long_description_content_type = text/markdown

testing/language_helpers.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 import os
 from typing import Sequence
 
-from pre_commit.languages.all import Language
+from pre_commit.lang_base import Language
 from pre_commit.prefix import Prefix
 
 
@@ -16,10 +16,13 @@ def run_language(
         version: str | None = None,
         deps: Sequence[str] = (),
         is_local: bool = False,
+        require_serial: bool = True,
+        color: bool = False,
 ) -> tuple[int, bytes]:
     prefix = Prefix(str(path))
     version = version or language.get_default_version()
 
+    if language.ENVIRONMENT_DIR is not None:
         language.install_environment(prefix, version, deps)
         health_error = language.health_check(prefix, version)
         assert health_error is None, health_error
@@ -30,8 +33,8 @@ def run_language(
             args,
             file_args,
             is_local=is_local,
-            require_serial=True,
+            require_serial=require_serial,
-            color=False,
+            color=color,
         )
         out = out.replace(b'\r\n', b'\n')
         return ret, out

testing/languages

@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import concurrent.futures
+import json
+import os.path
+import subprocess
+import sys
+
+EXCLUDED = frozenset((
+    ('windows-latest', 'docker'),
+    ('windows-latest', 'docker_image'),
+    ('windows-latest', 'lua'),
+    ('windows-latest', 'swift'),
+))
+
+
+def _lang_files(lang: str) -> frozenset[str]:
+    prog = f'''\
+import json
+import os.path
+import sys
+
+import pre_commit.languages.{lang}
+import tests.languages.{lang}_test
+
+modules = sorted(
+    os.path.relpath(v.__file__)
+    for k, v in sys.modules.items()
+    if k.startswith(('pre_commit.', 'tests.', 'testing.'))
+)
+print(json.dumps(modules))
+'''
+    out = json.loads(subprocess.check_output((sys.executable, '-c', prog)))
+    return frozenset(out)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--all', action='store_true')
+    args = parser.parse_args()
+
+    langs = [
+        os.path.splitext(fname)[0]
+        for fname in sorted(os.listdir('pre_commit/languages'))
+        if fname.endswith('.py') and fname != '__init__.py'
+    ]
+
+    if not args.all:
+        with concurrent.futures.ThreadPoolExecutor(os.cpu_count()) as exe:
+            by_lang = {
+                lang: files
+                for lang, files in zip(langs, exe.map(_lang_files, langs))
+            }
+
+        diff_cmd = ('git', 'diff', '--name-only', 'origin/main...HEAD')
+        files = set(subprocess.check_output(diff_cmd).decode().splitlines())
+
+        langs = [
+            lang
+            for lang, lang_files in by_lang.items()
+            if lang_files & files
+        ]
+
+    matched = [
+        {'os': os, 'language': lang}
+        for os in ('windows-latest', 'ubuntu-latest')
+        for lang in langs
+        if (os, lang) not in EXCLUDED
+    ]
+
+    with open(os.environ['GITHUB_OUTPUT'], 'a') as f:
+        f.write(f'languages={json.dumps(matched)}\n')
+    return 0
+
+
+if __name__ == '__main__':
+    raise SystemExit(main())

testing/resources/docker_hooks_repo/.pre-commit-hooks.yaml

@@ -1,17 +0,0 @@
--   id: docker-hook
-    name: Docker test hook
-    entry: echo
-    language: docker
-    files: \.txt$
-
--   id: docker-hook-arg
-    name: Docker test hook
-    entry: echo -n
-    language: docker
-    files: \.txt$
-
--   id: docker-hook-failing
-    name: Docker test hook with nonzero exit code
-    entry: bork
-    language: docker
-    files: \.txt$

testing/resources/docker_hooks_repo/Dockerfile

@@ -1,3 +0,0 @@
-FROM ubuntu:focal
-
-CMD ["echo", "This is overwritten by the .pre-commit-hooks.yaml 'entry'"]

testing/resources/docker_image_hooks_repo/.pre-commit-hooks.yaml

@@ -1,8 +0,0 @@
--   id: echo-entrypoint
-    name: echo (via --entrypoint)
-    language: docker_image
-    entry: --entrypoint echo ubuntu:focal
--   id: echo-cmd
-    name: echo (via cmd)
-    language: docker_image
-    entry: ubuntu:focal echo

testing/resources/dotnet_hooks_combo_repo/.pre-commit-hooks.yaml

@@ -1,12 +0,0 @@
--   id: dotnet-example-hook
-    name: Test Project 1
-    description: Test Project 1
-    entry: proj1
-    language: dotnet
-    stages: [commit]
--   id: proj2
-    name: Test Project 2
-    description: Test Project 2
-    entry: proj2
-    language: dotnet
-    stages: [commit]

testing/resources/dotnet_hooks_combo_repo/dotnet_hooks_combo_repo.sln

@@ -1,28 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.30114.105
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "proj1", "proj1\proj1.csproj", "{38A939C3-DEA4-47D7-9B75-0418C4249662}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "proj2", "proj2\proj2.csproj", "{4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{38A939C3-DEA4-47D7-9B75-0418C4249662}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{38A939C3-DEA4-47D7-9B75-0418C4249662}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{38A939C3-DEA4-47D7-9B75-0418C4249662}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{38A939C3-DEA4-47D7-9B75-0418C4249662}.Release|Any CPU.Build.0 = Release|Any CPU
-		{4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-EndGlobal

testing/resources/dotnet_hooks_combo_repo/proj1/Program.cs

@@ -1,12 +0,0 @@
-using System;
-
-namespace proj1
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.Write("Hello from dotnet!\n");
-        }
-    }
-}

testing/resources/dotnet_hooks_combo_repo/proj1/proj1.csproj

@@ -1,12 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net6</TargetFramework>
-
-    <PackAsTool>true</PackAsTool>
-    <ToolCommandName>proj1</ToolCommandName>
-    <PackageOutputPath>./nupkg</PackageOutputPath>
-  </PropertyGroup>
-
-</Project>

testing/resources/dotnet_hooks_combo_repo/proj2/Program.cs

@@ -1,12 +0,0 @@
-using System;
-
-namespace proj2
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.WriteLine("Hello World!");
-        }
-    }
-}

testing/resources/dotnet_hooks_combo_repo/proj2/proj2.csproj

@@ -1,12 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net6</TargetFramework>
-
-    <PackAsTool>true</PackAsTool>
-    <ToolCommandName>proj2</ToolCommandName>
-    <PackageOutputPath>./nupkg</PackageOutputPath>
-  </PropertyGroup>
-
-</Project>

testing/resources/dotnet_hooks_csproj_prefix_repo/.gitignore

@@ -1,3 +0,0 @@
-bin/
-obj/
-nupkg/

testing/resources/dotnet_hooks_csproj_prefix_repo/.pre-commit-hooks.yaml

@@ -1,5 +0,0 @@
--   id: dotnet-example-hook
-    name: dotnet example hook
-    entry: testeroni.tool
-    language: dotnet
-    files: ''

testing/resources/dotnet_hooks_csproj_prefix_repo/Program.cs

@@ -1,12 +0,0 @@
-using System;
-
-namespace dotnet_hooks_repo
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.WriteLine("Hello from dotnet!");
-        }
-    }
-}

testing/resources/dotnet_hooks_csproj_prefix_repo/dotnet_hooks_csproj_prefix_repo.csproj

@@ -1,9 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net7.0</TargetFramework>
-    <PackAsTool>true</PackAsTool>
-    <ToolCommandName>testeroni.tool</ToolCommandName>
-    <PackageOutputPath>./nupkg</PackageOutputPath>
-  </PropertyGroup>
-</Project>

testing/resources/dotnet_hooks_csproj_repo/.gitignore

@@ -1,3 +0,0 @@
-bin/
-obj/
-nupkg/

testing/resources/dotnet_hooks_csproj_repo/.pre-commit-hooks.yaml

@@ -1,5 +0,0 @@
--   id: dotnet-example-hook
-    name: dotnet example hook
-    entry: testeroni
-    language: dotnet
-    files: ''

testing/resources/dotnet_hooks_csproj_repo/Program.cs

@@ -1,12 +0,0 @@
-using System;
-
-namespace dotnet_hooks_repo
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.WriteLine("Hello from dotnet!");
-        }
-    }
-}

testing/resources/dotnet_hooks_csproj_repo/dotnet_hooks_csproj_repo.csproj

@@ -1,9 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net6</TargetFramework>
-    <PackAsTool>true</PackAsTool>
-    <ToolCommandName>testeroni</ToolCommandName>
-    <PackageOutputPath>./nupkg</PackageOutputPath>
-  </PropertyGroup>
-</Project>

testing/resources/dotnet_hooks_sln_repo/.gitignore

@@ -1,3 +0,0 @@
-bin/
-obj/
-nupkg/

testing/resources/dotnet_hooks_sln_repo/.pre-commit-hooks.yaml

@@ -1,5 +0,0 @@
--   id: dotnet-example-hook
-    name: dotnet example hook
-    entry: testeroni
-    language: dotnet
-    files: ''

testing/resources/dotnet_hooks_sln_repo/Program.cs

@@ -1,12 +0,0 @@
-using System;
-
-namespace dotnet_hooks_sln_repo
-{
-    class Program
-    {
-        static void Main(string[] args)
-        {
-            Console.WriteLine("Hello from dotnet!");
-        }
-    }
-}

testing/resources/dotnet_hooks_sln_repo/dotnet_hooks_sln_repo.csproj

@@ -1,9 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net6</TargetFramework>
-    <PackAsTool>true</PackAsTool>
-    <ToolCommandName>testeroni</ToolCommandName>
-    <PackageOutputPath>./nupkg</PackageOutputPath>
-  </PropertyGroup>
-</Project>

testing/resources/dotnet_hooks_sln_repo/dotnet_hooks_sln_repo.sln

@@ -1,34 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.26124.0
-MinimumVisualStudioVersion = 15.0.26124.0
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "dotnet_hooks_sln_repo", "dotnet_hooks_sln_repo.csproj", "{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Debug|x64 = Debug|x64
-		Debug|x86 = Debug|x86
-		Release|Any CPU = Release|Any CPU
-		Release|x64 = Release|x64
-		Release|x86 = Release|x86
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x64.Build.0 = Debug|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x86.Build.0 = Debug|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|Any CPU.Build.0 = Release|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x64.ActiveCfg = Release|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x64.Build.0 = Release|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x86.ActiveCfg = Release|Any CPU
-		{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x86.Build.0 = Release|Any CPU
-	EndGlobalSection
-EndGlobal

testing/resources/golang_hooks_repo/.pre-commit-hooks.yaml

@@ -1,5 +0,0 @@
--   id: golang-hook
-    name: golang example hook
-    entry: golang-hello-world
-    language: golang
-    files: ''

testing/resources/golang_hooks_repo/go.mod

@@ -1,5 +0,0 @@
-module golang-hello-world
-
-go 1.18
-
-require github.com/BurntSushi/toml v1.1.0

testing/resources/golang_hooks_repo/go.sum

@@ -1,2 +0,0 @@
-github.com/BurntSushi/toml v1.1.0 h1:ksErzDEI1khOiGPgpwuI7x2ebx/uXQNw7xJpn9Eq1+I=
-github.com/BurntSushi/toml v1.1.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=

testing/resources/golang_hooks_repo/golang-hello-world/main.go

@@ -1,23 +0,0 @@
-package main
-
-
-import (
-	"fmt"
-	"runtime"
-	"github.com/BurntSushi/toml"
-	"os"
-)
-
-type Config struct {
-	What string
-}
-
-func main() {
-	message := runtime.Version()
-	if len(os.Args) > 1 {
-		message = os.Args[1]
-	}
-	var conf Config
-	toml.Decode("What = 'world'\n", &conf)
-	fmt.Printf("hello %v from %s\n", conf.What, message)
-}

testing/resources/python_venv_hooks_repo/.pre-commit-hooks.yaml

@@ -1,5 +0,0 @@
--   id: foo
-    name: Foo
-    entry: foo
-    language: python_venv
-    files: \.py$

testing/resources/python_venv_hooks_repo/foo.py

@@ -1,9 +0,0 @@
-from __future__ import annotations
-
-import sys
-
-
-def main():
-    print(repr(sys.argv[1:]))
-    print('Hello World')
-    return 0

testing/resources/python_venv_hooks_repo/setup.py

@@ -1,10 +0,0 @@
-from __future__ import annotations
-
-from setuptools import setup
-
-setup(
-    name='foo',
-    version='0.0.0',
-    py_modules=['foo'],
-    entry_points={'console_scripts': ['foo = foo:main']},
-)

testing/util.py

@@ -6,24 +6,13 @@ import subprocess
 
 import pytest
 
-from pre_commit.util import CalledProcessError
 from pre_commit.util import cmd_output
-from pre_commit.util import cmd_output_b
 from testing.auto_namedtuple import auto_namedtuple
 
 
 TESTING_DIR = os.path.abspath(os.path.dirname(__file__))
 
 
-def docker_is_running() -> bool:  # pragma: win32 no cover
-    try:
-        cmd_output_b('docker', 'ps')
-    except CalledProcessError:  # pragma: no cover
-        return False
-    else:
-        return True
-
-
 def get_resource_path(path):
     return os.path.join(TESTING_DIR, 'resources', path)
 
@@ -41,10 +30,6 @@ def cmd_output_mocked_pre_commit_home(
     return ret, out.replace('\r\n', '\n'), None
 
 
-skipif_cant_run_docker = pytest.mark.skipif(
-    os.name == 'nt' or not docker_is_running(),
-    reason="Docker isn't running or can't be accessed",
-)
 xfailif_windows = pytest.mark.xfail(os.name == 'nt', reason='windows')
 
 

tests/all_languages_test.py

@@ -0,0 +1,7 @@
+from __future__ import annotations
+
+from pre_commit.all_languages import languages
+
+
+def test_python_venv_is_an_alias_to_python():
+    assert languages['python_venv'] is languages['python']

tests/commands/migrate_config_test.py

@@ -134,6 +134,39 @@ def test_migrate_config_sha_to_rev(tmpdir):
     )
 
 
+def test_migrate_config_language_python_venv(tmp_path):
+    src = '''\
+repos:
+-   repo: local
+    hooks:
+    -   id: example
+        name: example
+        entry: example
+        language: python_venv
+    -   id: example
+        name: example
+        entry: example
+        language: system
+'''
+    expected = '''\
+repos:
+-   repo: local
+    hooks:
+    -   id: example
+        name: example
+        entry: example
+        language: python
+    -   id: example
+        name: example
+        entry: example
+        language: system
+'''
+    cfg = tmp_path.joinpath('cfg.yaml')
+    cfg.write_text(src)
+    assert migrate_config(str(cfg)) == 0
+    assert cfg.read_text() == expected
+
+
 def test_migrate_config_invalid_yaml(tmpdir):
     contents = '['
     cfg = tmpdir.join(C.CONFIG_FILE)

tests/lang_base_test.py

@@ -8,8 +8,8 @@ from unittest import mock
 import pytest
 
 import pre_commit.constants as C
+from pre_commit import lang_base
 from pre_commit import parse_shebang
-from pre_commit.languages import helpers
 from pre_commit.prefix import Prefix
 from pre_commit.util import CalledProcessError
 
@@ -32,42 +32,42 @@ def homedir_mck():
 
 def test_exe_exists_does_not_exist(find_exe_mck, homedir_mck):
     find_exe_mck.return_value = None
-    assert helpers.exe_exists('ruby') is False
+    assert lang_base.exe_exists('ruby') is False
 
 
 def test_exe_exists_exists(find_exe_mck, homedir_mck):
     find_exe_mck.return_value = os.path.normpath('/usr/bin/ruby')
-    assert helpers.exe_exists('ruby') is True
+    assert lang_base.exe_exists('ruby') is True
 
 
 def test_exe_exists_false_if_shim(find_exe_mck, homedir_mck):
     find_exe_mck.return_value = os.path.normpath('/foo/shims/ruby')
-    assert helpers.exe_exists('ruby') is False
+    assert lang_base.exe_exists('ruby') is False
 
 
 def test_exe_exists_false_if_homedir(find_exe_mck, homedir_mck):
     find_exe_mck.return_value = os.path.normpath('/home/me/somedir/ruby')
-    assert helpers.exe_exists('ruby') is False
+    assert lang_base.exe_exists('ruby') is False
 
 
 def test_exe_exists_commonpath_raises_ValueError(find_exe_mck, homedir_mck):
     find_exe_mck.return_value = os.path.normpath('/usr/bin/ruby')
     with mock.patch.object(os.path, 'commonpath', side_effect=ValueError):
-        assert helpers.exe_exists('ruby') is True
+        assert lang_base.exe_exists('ruby') is True
 
 
 def test_exe_exists_true_when_homedir_is_slash(find_exe_mck):
     find_exe_mck.return_value = os.path.normpath('/usr/bin/ruby')
     with mock.patch.object(os.path, 'expanduser', return_value=os.sep):
-        assert helpers.exe_exists('ruby') is True
+        assert lang_base.exe_exists('ruby') is True
 
 
 def test_basic_get_default_version():
-    assert helpers.basic_get_default_version() == C.DEFAULT
+    assert lang_base.basic_get_default_version() == C.DEFAULT
 
 
 def test_basic_health_check():
-    assert helpers.basic_health_check(Prefix('.'), 'default') is None
+    assert lang_base.basic_health_check(Prefix('.'), 'default') is None
 
 
 def test_failed_setup_command_does_not_unicode_error():
@@ -79,12 +79,27 @@ def test_failed_setup_command_does_not_unicode_error():
 
     # an assertion that this does not raise `UnicodeError`
     with pytest.raises(CalledProcessError):
-        helpers.run_setup_cmd(Prefix('.'), (sys.executable, '-c', script))
+        lang_base.setup_cmd(Prefix('.'), (sys.executable, '-c', script))
+
+
+def test_environment_dir(tmp_path):
+    ret = lang_base.environment_dir(Prefix(tmp_path), 'langenv', 'default')
+    assert ret == f'{tmp_path}{os.sep}langenv-default'
+
+
+def test_assert_version_default():
+    with pytest.raises(AssertionError) as excinfo:
+        lang_base.assert_version_default('lang', '1.2.3')
+    msg, = excinfo.value.args
+    assert msg == (
+        'for now, pre-commit requires system-installed lang -- '
+        'you selected `language_version: 1.2.3`'
+    )
 
 
 def test_assert_no_additional_deps():
     with pytest.raises(AssertionError) as excinfo:
-        helpers.assert_no_additional_deps('lang', ['hmmm'])
+        lang_base.assert_no_additional_deps('lang', ['hmmm'])
     msg, = excinfo.value.args
     assert msg == (
         'for now, pre-commit does not support additional_dependencies for '
@@ -93,22 +108,30 @@ def test_assert_no_additional_deps():
     )
 
 
+def test_no_env_noop(tmp_path):
+    before = os.environ.copy()
+    with lang_base.no_env(Prefix(tmp_path), '1.2.3'):
+        inside = os.environ.copy()
+    after = os.environ.copy()
+    assert before == inside == after
+
+
 def test_target_concurrency_normal():
     with mock.patch.object(multiprocessing, 'cpu_count', return_value=123):
         with mock.patch.dict(os.environ, {}, clear=True):
-            assert helpers.target_concurrency() == 123
+            assert lang_base.target_concurrency() == 123
 
 
 def test_target_concurrency_testing_env_var():
     with mock.patch.dict(
             os.environ, {'PRE_COMMIT_NO_CONCURRENCY': '1'}, clear=True,
     ):
-        assert helpers.target_concurrency() == 1
+        assert lang_base.target_concurrency() == 1
 
 
 def test_target_concurrency_on_travis():
     with mock.patch.dict(os.environ, {'TRAVIS': '1'}, clear=True):
-        assert helpers.target_concurrency() == 2
+        assert lang_base.target_concurrency() == 2
 
 
 def test_target_concurrency_cpu_count_not_implemented():
@@ -116,20 +139,35 @@ def test_target_concurrency_cpu_count_not_implemented():
             multiprocessing, 'cpu_count', side_effect=NotImplementedError,
     ):
         with mock.patch.dict(os.environ, {}, clear=True):
-            assert helpers.target_concurrency() == 1
+            assert lang_base.target_concurrency() == 1
 
 
 def test_shuffled_is_deterministic():
     seq = [str(i) for i in range(10)]
     expected = ['4', '0', '5', '1', '8', '6', '2', '3', '7', '9']
-    assert helpers._shuffled(seq) == expected
+    assert lang_base._shuffled(seq) == expected
 
 
 def test_xargs_require_serial_is_not_shuffled():
-    ret, out = helpers.run_xargs(
+    ret, out = lang_base.run_xargs(
         ('echo',), [str(i) for i in range(10)],
         require_serial=True,
         color=False,
     )
     assert ret == 0
     assert out.strip() == b'0 1 2 3 4 5 6 7 8 9'
+
+
+def test_basic_run_hook(tmp_path):
+    ret, out = lang_base.basic_run_hook(
+        Prefix(tmp_path),
+        'echo hi',
+        ['hello'],
+        ['file', 'file', 'file'],
+        is_local=False,
+        require_serial=False,
+        color=False,
+    )
+    assert ret == 0
+    out = out.replace(b'\r\n', b'\n')
+    assert out == b'hi hello file file file\n'

tests/languages/docker_image_test.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from pre_commit.languages import docker_image
+from testing.language_helpers import run_language
+from testing.util import xfailif_windows
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_docker_image_hook_via_entrypoint(tmp_path):
+    ret = run_language(
+        tmp_path,
+        docker_image,
+        '--entrypoint echo ubuntu:22.04',
+        args=('hello hello world',),
+    )
+    assert ret == (0, b'hello hello world\n')
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_docker_image_hook_via_args(tmp_path):
+    ret = run_language(
+        tmp_path,
+        docker_image,
+        'ubuntu:22.04 echo',
+        args=('hello hello world',),
+    )
+    assert ret == (0, b'hello hello world\n')

tests/languages/docker_test.py

@@ -11,6 +11,8 @@ import pytest
 
 from pre_commit.languages import docker
 from pre_commit.util import CalledProcessError
+from testing.language_helpers import run_language
+from testing.util import xfailif_windows
 
 DOCKER_CGROUP_EXAMPLE = b'''\
 12:hugetlb:/docker/c33988ec7651ebc867cb24755eaf637a6734088bc7eef59d5799293a9e5450f7
@@ -181,3 +183,15 @@ def test_get_docker_path_in_docker_docker_in_docker(in_docker):
     err = CalledProcessError(1, (), b'', b'')
     with mock.patch.object(docker, 'cmd_output_b', side_effect=err):
         assert docker._get_docker_path('/project') == '/project'
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_docker_hook(tmp_path):
+    dockerfile = '''\
+FROM ubuntu:22.04
+CMD ["echo", "This is overwritten by the entry"']
+'''
+    tmp_path.joinpath('Dockerfile').write_text(dockerfile)
+
+    ret = run_language(tmp_path, docker, 'echo hello hello world')
+    assert ret == (0, b'hello hello world\n')

tests/languages/dotnet_test.py

@@ -0,0 +1,154 @@
+from __future__ import annotations
+
+from pre_commit.languages import dotnet
+from testing.language_helpers import run_language
+
+
+def _write_program_cs(tmp_path):
+    program_cs = '''\
+using System;
+
+namespace dotnet_tests
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello from dotnet!");
+        }
+    }
+}
+'''
+    tmp_path.joinpath('Program.cs').write_text(program_cs)
+
+
+def _csproj(tool_name):
+    return f'''\
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6</TargetFramework>
+    <PackAsTool>true</PackAsTool>
+    <ToolCommandName>{tool_name}</ToolCommandName>
+    <PackageOutputPath>./nupkg</PackageOutputPath>
+  </PropertyGroup>
+</Project>
+'''
+
+
+def test_dotnet_csproj(tmp_path):
+    csproj = _csproj('testeroni')
+    _write_program_cs(tmp_path)
+    tmp_path.joinpath('dotnet_csproj.csproj').write_text(csproj)
+    ret = run_language(tmp_path, dotnet, 'testeroni')
+    assert ret == (0, b'Hello from dotnet!\n')
+
+
+def test_dotnet_csproj_prefix(tmp_path):
+    csproj = _csproj('testeroni.tool')
+    _write_program_cs(tmp_path)
+    tmp_path.joinpath('dotnet_hooks_csproj_prefix.csproj').write_text(csproj)
+    ret = run_language(tmp_path, dotnet, 'testeroni.tool')
+    assert ret == (0, b'Hello from dotnet!\n')
+
+
+def test_dotnet_sln(tmp_path):
+    csproj = _csproj('testeroni')
+    sln = '''\
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.26124.0
+MinimumVisualStudioVersion = 15.0.26124.0
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "dotnet_hooks_sln_repo", "dotnet_hooks_sln_repo.csproj", "{6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}"
+EndProject
+Global
+        GlobalSection(SolutionConfigurationPlatforms) = preSolution
+                Debug|Any CPU = Debug|Any CPU
+                Debug|x64 = Debug|x64
+                Debug|x86 = Debug|x86
+                Release|Any CPU = Release|Any CPU
+                Release|x64 = Release|x64
+                Release|x86 = Release|x86
+        EndGlobalSection
+        GlobalSection(SolutionProperties) = preSolution
+                HideSolutionNode = FALSE
+        EndGlobalSection
+        GlobalSection(ProjectConfigurationPlatforms) = postSolution
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x64.ActiveCfg = Debug|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x64.Build.0 = Debug|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x86.ActiveCfg = Debug|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Debug|x86.Build.0 = Debug|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|Any CPU.Build.0 = Release|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x64.ActiveCfg = Release|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x64.Build.0 = Release|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x86.ActiveCfg = Release|Any CPU
+                {6568CFDB-6F6F-45A9-932C-8C7DAABC8E56}.Release|x86.Build.0 = Release|Any CPU
+        EndGlobalSection
+EndGlobal
+'''  # noqa: E501
+    _write_program_cs(tmp_path)
+    tmp_path.joinpath('dotnet_hooks_sln_repo.csproj').write_text(csproj)
+    tmp_path.joinpath('dotnet_hooks_sln_repo.sln').write_text(sln)
+
+    ret = run_language(tmp_path, dotnet, 'testeroni')
+    assert ret == (0, b'Hello from dotnet!\n')
+
+
+def _setup_dotnet_combo(tmp_path):
+    sln = '''\
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30114.105
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "proj1", "proj1\\proj1.csproj", "{38A939C3-DEA4-47D7-9B75-0418C4249662}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "proj2", "proj2\\proj2.csproj", "{4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}"
+EndProject
+Global
+        GlobalSection(SolutionConfigurationPlatforms) = preSolution
+                Debug|Any CPU = Debug|Any CPU
+                Release|Any CPU = Release|Any CPU
+        EndGlobalSection
+        GlobalSection(SolutionProperties) = preSolution
+                HideSolutionNode = FALSE
+        EndGlobalSection
+        GlobalSection(ProjectConfigurationPlatforms) = postSolution
+                {38A939C3-DEA4-47D7-9B75-0418C4249662}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {38A939C3-DEA4-47D7-9B75-0418C4249662}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {38A939C3-DEA4-47D7-9B75-0418C4249662}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {38A939C3-DEA4-47D7-9B75-0418C4249662}.Release|Any CPU.Build.0 = Release|Any CPU
+                {4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+                {4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+                {4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+                {4C9916CB-165C-4EF5-8A57-4CB6794C1EBF}.Release|Any CPU.Build.0 = Release|Any CPU
+        EndGlobalSection
+EndGlobal
+'''  # noqa: E501
+    tmp_path.joinpath('dotnet_hooks_combo_repo.sln').write_text(sln)
+
+    csproj1 = _csproj('proj1')
+    proj1 = tmp_path.joinpath('proj1')
+    proj1.mkdir()
+    proj1.joinpath('proj1.csproj').write_text(csproj1)
+    _write_program_cs(proj1)
+
+    csproj2 = _csproj('proj2')
+    proj2 = tmp_path.joinpath('proj2')
+    proj2.mkdir()
+    proj2.joinpath('proj2.csproj').write_text(csproj2)
+    _write_program_cs(proj2)
+
+
+def test_dotnet_combo_proj1(tmp_path):
+    _setup_dotnet_combo(tmp_path)
+    ret = run_language(tmp_path, dotnet, 'proj1')
+    assert ret == (0, b'Hello from dotnet!\n')
+
+
+def test_dotnet_combo_proj2(tmp_path):
+    _setup_dotnet_combo(tmp_path)
+    ret = run_language(tmp_path, dotnet, 'proj2')
+    assert ret == (0, b'Hello from dotnet!\n')

tests/languages/fail_test.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from pre_commit.languages import fail
+from testing.language_helpers import run_language
+
+
+def test_fail_hooks(tmp_path):
+    ret = run_language(
+        tmp_path,
+        fail,
+        'watch out for',
+        file_args=('bunnies',),
+    )
+    assert ret == (1, b'watch out for\n\nbunnies\n')

tests/languages/golang_test.py

@@ -6,8 +6,11 @@ import pytest
 import re_assert
 
 import pre_commit.constants as C
+from pre_commit import lang_base
+from pre_commit.envcontext import envcontext
 from pre_commit.languages import golang
-from pre_commit.languages import helpers
+from pre_commit.store import _make_local_repo
+from testing.language_helpers import run_language
 
 
 ACTUAL_GET_DEFAULT_VERSION = golang.get_default_version.__wrapped__
@@ -15,7 +18,7 @@ ACTUAL_GET_DEFAULT_VERSION = golang.get_default_version.__wrapped__
 
 @pytest.fixture
 def exe_exists_mck():
-    with mock.patch.object(helpers, 'exe_exists') as mck:
+    with mock.patch.object(lang_base, 'exe_exists') as mck:
         yield mck
 
 
@@ -41,3 +44,93 @@ def test_golang_infer_go_version_default():
 
     assert version != C.DEFAULT
     re_assert.Matches(r'^\d+\.\d+(?:\.\d+)?$').assert_matches(version)
+
+
+def _make_hello_world(tmp_path):
+    go_mod = '''\
+module golang-hello-world
+
+go 1.18
+
+require github.com/BurntSushi/toml v1.1.0
+'''
+    go_sum = '''\
+github.com/BurntSushi/toml v1.1.0 h1:ksErzDEI1khOiGPgpwuI7x2ebx/uXQNw7xJpn9Eq1+I=
+github.com/BurntSushi/toml v1.1.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+'''  # noqa: E501
+    hello_world_go = '''\
+package main
+
+
+import (
+        "fmt"
+        "github.com/BurntSushi/toml"
+)
+
+type Config struct {
+        What string
+}
+
+func main() {
+        var conf Config
+        toml.Decode("What = 'world'\\n", &conf)
+        fmt.Printf("hello %v\\n", conf.What)
+}
+'''
+    tmp_path.joinpath('go.mod').write_text(go_mod)
+    tmp_path.joinpath('go.sum').write_text(go_sum)
+    mod_dir = tmp_path.joinpath('golang-hello-world')
+    mod_dir.mkdir()
+    main_file = mod_dir.joinpath('main.go')
+    main_file.write_text(hello_world_go)
+
+
+def test_golang_system(tmp_path):
+    _make_hello_world(tmp_path)
+
+    ret = run_language(tmp_path, golang, 'golang-hello-world')
+    assert ret == (0, b'hello world\n')
+
+
+def test_golang_default_version(tmp_path):
+    _make_hello_world(tmp_path)
+
+    ret = run_language(
+        tmp_path,
+        golang,
+        'golang-hello-world',
+        version=C.DEFAULT,
+    )
+    assert ret == (0, b'hello world\n')
+
+
+def test_golang_versioned(tmp_path):
+    _make_local_repo(str(tmp_path))
+
+    ret, out = run_language(
+        tmp_path,
+        golang,
+        'go version',
+        version='1.18.4',
+    )
+
+    assert ret == 0
+    assert out.startswith(b'go version go1.18.4')
+
+
+def test_local_golang_additional_deps(tmp_path):
+    _make_local_repo(str(tmp_path))
+
+    ret = run_language(
+        tmp_path,
+        golang,
+        'hello',
+        deps=('golang.org/x/example/hello@latest',),
+    )
+
+    assert ret == (0, b'Hello, Go examples!\n')
+
+
+def test_golang_hook_still_works_when_gobin_is_set(tmp_path):
+    with envcontext((('GOBIN', str(tmp_path.joinpath('gobin'))),)):
+        test_golang_system(tmp_path)

tests/languages/pygrep_test.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import pytest
 
 from pre_commit.languages import pygrep
+from testing.language_helpers import run_language
 
 
 @pytest.fixture
@@ -13,6 +14,9 @@ def some_files(tmpdir):
     tmpdir.join('f4').write_binary(b'foo\npattern\nbar\n')
     tmpdir.join('f5').write_binary(b'[INFO] hi\npattern\nbar')
     tmpdir.join('f6').write_binary(b"pattern\nbarwith'foo\n")
+    tmpdir.join('f7').write_binary(b"hello'hi\nworld\n")
+    tmpdir.join('f8').write_binary(b'foo\nbar\nbaz\n')
+    tmpdir.join('f9').write_binary(b'[WARN] hi\n')
     with tmpdir.as_cwd():
         yield
 
@@ -125,3 +129,16 @@ def test_multiline_multiline_flag_is_enabled(cap_out):
     out = cap_out.get()
     assert ret == 1
     assert out == 'f1:1:foo\nbar\n'
+
+
+def test_grep_hook_matching(some_files, tmp_path):
+    ret = run_language(
+        tmp_path, pygrep, 'ello', file_args=('f7', 'f8', 'f9'),
+    )
+    assert ret == (1, b"f7:1:hello'hi\n")
+
+
+@pytest.mark.parametrize('regex', ('nope', "foo'bar", r'^\[INFO\]'))
+def test_grep_hook_not_matching(regex, some_files, tmp_path):
+    ret = run_language(tmp_path, pygrep, regex, file_args=('f7', 'f8', 'f9'))
+    assert ret == (0, b'')

tests/languages/python_test.py

@@ -12,6 +12,7 @@ from pre_commit.languages import python
 from pre_commit.prefix import Prefix
 from pre_commit.util import make_executable
 from pre_commit.util import win_exe
+from testing.language_helpers import run_language
 
 
 def test_read_pyvenv_cfg(tmpdir):
@@ -210,3 +211,25 @@ def test_unhealthy_then_replaced(python_dir):
     os.replace(f'{py_exe}.tmp', py_exe)
 
     assert python.health_check(prefix, C.DEFAULT) is None
+
+
+def test_language_versioned_python_hook(tmp_path):
+    setup_py = '''\
+from setuptools import setup
+setup(
+    name='example',
+    py_modules=['mod'],
+    entry_points={'console_scripts': ['myexe=mod:main']},
+)
+'''
+    tmp_path.joinpath('setup.py').write_text(setup_py)
+    tmp_path.joinpath('mod.py').write_text('def main(): print("ohai")')
+
+    # we patch this to force virtualenv executing with `-p` since we can't
+    # reliably have multiple pythons available in CI
+    with mock.patch.object(
+            python,
+            '_sys_executable_matches',
+            return_value=False,
+    ):
+        assert run_language(tmp_path, python, 'myexe') == (0, b'ohai\n')

tests/languages/ruby_test.py

@@ -9,8 +9,8 @@ import pre_commit.constants as C
 from pre_commit import parse_shebang
 from pre_commit.envcontext import envcontext
 from pre_commit.languages import ruby
+from pre_commit.languages.ruby import _resource_bytesio
 from pre_commit.store import _make_local_repo
-from pre_commit.util import resource_bytesio
 from testing.language_helpers import run_language
 from testing.util import cwd
 from testing.util import xfailif_windows
@@ -40,7 +40,7 @@ def test_uses_system_if_both_gem_and_ruby_are_available(find_exe_mck):
     ('rbenv.tar.gz', 'ruby-build.tar.gz', 'ruby-download.tar.gz'),
 )
 def test_archive_root_stat(filename):
-    with resource_bytesio(filename) as f:
+    with _resource_bytesio(filename) as f:
         with tarfile.open(fileobj=f) as tarf:
             root, _, _ = filename.partition('.')
             assert oct(tarf.getmember(root).mode) == '0o755'

tests/languages/script_test.py

@@ -0,0 +1,14 @@
+from __future__ import annotations
+
+from pre_commit.languages import script
+from pre_commit.util import make_executable
+from testing.language_helpers import run_language
+
+
+def test_script_language(tmp_path):
+    exe = tmp_path.joinpath('main')
+    exe.write_text('#!/usr/bin/env bash\necho hello hello world\n')
+    make_executable(exe)
+
+    expected = (0, b'hello hello world\n')
+    assert run_language(tmp_path, script, 'main') == expected

tests/languages/system_test.py

@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+from pre_commit.languages import system
+from testing.language_helpers import run_language
+
+
+def test_system_language(tmp_path):
+    expected = (0, b'hello hello world\n')
+    assert run_language(tmp_path, system, 'echo hello hello world') == expected

tests/repository_test.py

@@ -10,15 +10,12 @@ import pytest
 import re_assert
 
 import pre_commit.constants as C
-from pre_commit import git
+from pre_commit import lang_base
+from pre_commit.all_languages import languages
 from pre_commit.clientlib import CONFIG_SCHEMA
 from pre_commit.clientlib import load_manifest
-from pre_commit.envcontext import envcontext
 from pre_commit.hook import Hook
-from pre_commit.languages import golang
-from pre_commit.languages import helpers
 from pre_commit.languages import python
-from pre_commit.languages.all import languages
 from pre_commit.prefix import Prefix
 from pre_commit.repository import _hook_installed
 from pre_commit.repository import all_hooks
@@ -28,22 +25,20 @@ from pre_commit.util import cmd_output_b
 from testing.fixtures import make_config_from_repo
 from testing.fixtures import make_repo
 from testing.fixtures import modify_manifest
+from testing.language_helpers import run_language
 from testing.util import cwd
 from testing.util import get_resource_path
-from testing.util import skipif_cant_run_docker
-
-
-def _norm_out(b):
-    return b.replace(b'\r\n', b'\n')
 
 
 def _hook_run(hook, filenames, color):
-    with languages[hook.language].in_env(hook.prefix, hook.language_version):
+    return run_language(
-        return languages[hook.language].run_hook(
+        path=hook.prefix.prefix_dir,
-            hook.prefix,
+        language=languages[hook.language],
-            hook.entry,
+        exe=hook.entry,
-            hook.args,
+        args=hook.args,
-            filenames,
+        file_args=filenames,
+        version=hook.language_version,
+        deps=hook.additional_dependencies,
         is_local=hook.src == 'local',
         require_serial=hook.require_serial,
         color=color,
@@ -81,7 +76,7 @@ def _test_hook_repo(
     hook = _get_hook(config, store, hook_id)
     ret, out = _hook_run(hook, args, color=color)
     assert ret == expected_return_code
-    assert _norm_out(out) == expected
+    assert out == expected
 
 
 def test_python_hook(tempdir_factory, store):
@@ -129,66 +124,21 @@ def test_python_hook_weird_setup_cfg(in_git_dir, tempdir_factory, store):
     )
 
 
-def test_python_venv(tempdir_factory, store):
+def test_python_venv_deprecation(store, caplog):
-    _test_hook_repo(
+    config = {
-        tempdir_factory, store, 'python_venv_hooks_repo',
+        'repo': 'local',
-        'foo', [os.devnull],
+        'hooks': [{
-        f'[{os.devnull!r}]\nHello World\n'.encode(),
+            'id': 'example',
-    )
+            'name': 'example',
-
+            'language': 'python_venv',
-
+            'entry': 'echo hi',
-def test_language_versioned_python_hook(tempdir_factory, store):
+        }],
-    # we patch this force virtualenv executing with `-p` since we can't
+    }
-    # reliably have multiple pythons available in CI
+    _get_hook(config, store, 'example')
-    with mock.patch.object(
+    assert caplog.messages[-1] == (
-            python,
+        '`repo: local` uses deprecated `language: python_venv`.  '
-            '_sys_executable_matches',
+        'This is an alias for `language: python`.  '
-            return_value=False,
+        'Often `pre-commit autoupdate --repo local` will fix this.'
-    ):
-        _test_hook_repo(
-            tempdir_factory, store, 'python3_hooks_repo',
-            'python3-hook',
-            [os.devnull],
-            f'3\n[{os.devnull!r}]\nHello World\n'.encode(),
-        )
-
-
-@skipif_cant_run_docker  # pragma: win32 no cover
-def test_run_a_docker_hook(tempdir_factory, store):
-    _test_hook_repo(
-        tempdir_factory, store, 'docker_hooks_repo',
-        'docker-hook',
-        ['Hello World from docker'], b'Hello World from docker\n',
-    )
-
-
-@skipif_cant_run_docker  # pragma: win32 no cover
-def test_run_a_docker_hook_with_entry_args(tempdir_factory, store):
-    _test_hook_repo(
-        tempdir_factory, store, 'docker_hooks_repo',
-        'docker-hook-arg',
-        ['Hello World from docker'], b'Hello World from docker',
-    )
-
-
-@skipif_cant_run_docker  # pragma: win32 no cover
-def test_run_a_failing_docker_hook(tempdir_factory, store):
-    _test_hook_repo(
-        tempdir_factory, store, 'docker_hooks_repo',
-        'docker-hook-failing',
-        ['Hello World from docker'],
-        mock.ANY,  # an error message about `bork` not existing
-        expected_return_code=127,
-    )
-
-
-@skipif_cant_run_docker  # pragma: win32 no cover
-@pytest.mark.parametrize('hook_id', ('echo-entrypoint', 'echo-cmd'))
-def test_run_a_docker_image_hook(tempdir_factory, store, hook_id):
-    _test_hook_repo(
-        tempdir_factory, store, 'docker_image_hooks_repo',
-        hook_id,
-        ['Hello World from docker'], b'Hello World from docker\n',
     )
 
 
@@ -199,92 +149,6 @@ def test_system_hook_with_spaces(tempdir_factory, store):
     )
 
 
-def test_golang_system_hook(tempdir_factory, store):
-    _test_hook_repo(
-        tempdir_factory, store, 'golang_hooks_repo',
-        'golang-hook', ['system'], b'hello world from system\n',
-        config_kwargs={
-            'hooks': [{
-                'id': 'golang-hook',
-                'language_version': 'system',
-            }],
-        },
-    )
-
-
-def test_golang_versioned_hook(tempdir_factory, store):
-    _test_hook_repo(
-        tempdir_factory, store, 'golang_hooks_repo',
-        'golang-hook', [], b'hello world from go1.18.4\n',
-        config_kwargs={
-            'hooks': [{
-                'id': 'golang-hook',
-                'language_version': '1.18.4',
-            }],
-        },
-    )
-
-
-def test_golang_hook_still_works_when_gobin_is_set(tempdir_factory, store):
-    gobin_dir = tempdir_factory.get()
-    with envcontext((('GOBIN', gobin_dir),)):
-        test_golang_system_hook(tempdir_factory, store)
-    assert os.listdir(gobin_dir) == []
-
-
-def test_golang_with_recursive_submodule(tmpdir, tempdir_factory, store):
-    sub_go = '''\
-package sub
-
-import "fmt"
-
-func Func() {
-    fmt.Println("hello hello world")
-}
-'''
-    sub = tmpdir.join('sub').ensure_dir()
-    sub.join('sub.go').write(sub_go)
-    cmd_output('git', '-C', str(sub), 'init', '.')
-    cmd_output('git', '-C', str(sub), 'add', '.')
-    git.commit(str(sub))
-
-    pre_commit_hooks = '''\
--   id: example
-    name: example
-    entry: example
-    language: golang
-    verbose: true
-'''
-    go_mod = '''\
-module github.com/asottile/example
-
-go 1.14
-'''
-    main_go = '''\
-package main
-
-import "github.com/asottile/example/sub"
-
-func main() {
-    sub.Func()
-}
-'''
-    repo = tmpdir.join('repo').ensure_dir()
-    repo.join('.pre-commit-hooks.yaml').write(pre_commit_hooks)
-    repo.join('go.mod').write(go_mod)
-    repo.join('main.go').write(main_go)
-    cmd_output('git', '-C', str(repo), 'init', '.')
-    cmd_output('git', '-C', str(repo), 'add', '.')
-    cmd_output('git', '-C', str(repo), 'submodule', 'add', str(sub), 'sub')
-    git.commit(str(repo))
-
-    config = make_config_from_repo(str(repo))
-    hook = _get_hook(config, store, 'example')
-    ret, out = _hook_run(hook, (), color=False)
-    assert ret == 0
-    assert _norm_out(out) == b'hello hello world\n'
-
-
 def test_missing_executable(tempdir_factory, store):
     _test_hook_repo(
         tempdir_factory, store, 'not_found_exe',
@@ -345,52 +209,6 @@ def test_output_isatty(tempdir_factory, store):
     )
 
 
-def _make_grep_repo(entry, store, args=()):
-    config = {
-        'repo': 'local',
-        'hooks': [{
-            'id': 'grep-hook',
-            'name': 'grep-hook',
-            'language': 'pygrep',
-            'entry': entry,
-            'args': args,
-            'types': ['text'],
-        }],
-    }
-    return _get_hook(config, store, 'grep-hook')
-
-
-@pytest.fixture
-def greppable_files(tmpdir):
-    with tmpdir.as_cwd():
-        cmd_output_b('git', 'init', '.')
-        tmpdir.join('f1').write_binary(b"hello'hi\nworld\n")
-        tmpdir.join('f2').write_binary(b'foo\nbar\nbaz\n')
-        tmpdir.join('f3').write_binary(b'[WARN] hi\n')
-        yield tmpdir
-
-
-def test_grep_hook_matching(greppable_files, store):
-    hook = _make_grep_repo('ello', store)
-    ret, out = _hook_run(hook, ('f1', 'f2', 'f3'), color=False)
-    assert ret == 1
-    assert _norm_out(out) == b"f1:1:hello'hi\n"
-
-
-def test_grep_hook_case_insensitive(greppable_files, store):
-    hook = _make_grep_repo('ELLO', store, args=['-i'])
-    ret, out = _hook_run(hook, ('f1', 'f2', 'f3'), color=False)
-    assert ret == 1
-    assert _norm_out(out) == b"f1:1:hello'hi\n"
-
-
-@pytest.mark.parametrize('regex', ('nope', "foo'bar", r'^\[INFO\]'))
-def test_grep_hook_not_matching(regex, greppable_files, store):
-    hook = _make_grep_repo(regex, store)
-    ret, out = _hook_run(hook, ('f1', 'f2', 'f3'), color=False)
-    assert (ret, out) == (0, b'')
-
-
 def _norm_pwd(path):
     # Under windows bash's temp and windows temp is different.
     # This normalizes to the bash /tmp
@@ -440,7 +258,7 @@ def test_repository_state_compatibility(tempdir_factory, store, v):
 
     config = make_config_from_repo(path)
     hook = _get_hook(config, store, 'foo')
-    envdir = helpers.environment_dir(
+    envdir = lang_base.environment_dir(
         hook.prefix,
         python.ENVIRONMENT_DIR,
         hook.language_version,
@@ -449,67 +267,6 @@ def test_repository_state_compatibility(tempdir_factory, store, v):
     assert _hook_installed(hook) is True
 
 
-def test_additional_golang_dependencies_installed(
-        tempdir_factory, store,
-):
-    path = make_repo(tempdir_factory, 'golang_hooks_repo')
-    config = make_config_from_repo(path)
-    # A small go package
-    deps = ['golang.org/x/example/hello@latest']
-    config['hooks'][0]['additional_dependencies'] = deps
-    hook = _get_hook(config, store, 'golang-hook')
-    envdir = helpers.environment_dir(
-        hook.prefix,
-        golang.ENVIRONMENT_DIR,
-        golang.get_default_version(),
-    )
-    binaries = os.listdir(os.path.join(envdir, 'bin'))
-    # normalize for windows
-    binaries = [os.path.splitext(binary)[0] for binary in binaries]
-    assert 'hello' in binaries
-
-
-def test_local_golang_additional_dependencies(store):
-    config = {
-        'repo': 'local',
-        'hooks': [{
-            'id': 'hello',
-            'name': 'hello',
-            'entry': 'hello',
-            'language': 'golang',
-            'additional_dependencies': ['golang.org/x/example/hello@latest'],
-        }],
-    }
-    hook = _get_hook(config, store, 'hello')
-    ret, out = _hook_run(hook, (), color=False)
-    assert ret == 0
-    assert _norm_out(out) == b'Hello, Go examples!\n'
-
-
-def test_fail_hooks(store):
-    config = {
-        'repo': 'local',
-        'hooks': [{
-            'id': 'fail',
-            'name': 'fail',
-            'language': 'fail',
-            'entry': 'make sure to name changelogs as .rst!',
-            'files': r'changelog/.*(?<!\.rst)$',
-        }],
-    }
-    hook = _get_hook(config, store, 'fail')
-    ret, out = _hook_run(
-        hook, ('changelog/123.bugfix', 'changelog/wat'), color=False,
-    )
-    assert ret == 1
-    assert out == (
-        b'make sure to name changelogs as .rst!\n'
-        b'\n'
-        b'changelog/123.bugfix\n'
-        b'changelog/wat\n'
-    )
-
-
 def test_unknown_keys(store, caplog):
     config = {
         'repo': 'local',
@@ -553,7 +310,7 @@ def test_control_c_control_c_on_install(tempdir_factory, store):
     # raise as well.
     with pytest.raises(MyKeyboardInterrupt):
         with mock.patch.object(
-            helpers, 'run_setup_cmd', side_effect=MyKeyboardInterrupt,
+            lang_base, 'setup_cmd', side_effect=MyKeyboardInterrupt,
         ):
             with mock.patch.object(
                 shutil, 'rmtree', side_effect=MyKeyboardInterrupt,
@@ -562,7 +319,7 @@ def test_control_c_control_c_on_install(tempdir_factory, store):
 
     # Should have made an environment, however this environment is broken!
     hook, = hooks
-    envdir = helpers.environment_dir(
+    envdir = lang_base.environment_dir(
         hook.prefix,
         python.ENVIRONMENT_DIR,
         hook.language_version,
@@ -585,7 +342,7 @@ def test_invalidated_virtualenv(tempdir_factory, store):
     hook = _get_hook(config, store, 'foo')
 
     # Simulate breaking of the virtualenv
-    envdir = helpers.environment_dir(
+    envdir = lang_base.environment_dir(
         hook.prefix,
         python.ENVIRONMENT_DIR,
         hook.language_version,
@@ -667,7 +424,7 @@ def test_local_python_repo(store, local_python_config):
     assert hook.language_version != C.DEFAULT
     ret, out = _hook_run(hook, ('filename',), color=False)
     assert ret == 0
-    assert _norm_out(out) == b"['filename']\nHello World\n"
+    assert out == b"['filename']\nHello World\n"
 
 
 def test_default_language_version(store, local_python_config):
@@ -781,22 +538,6 @@ def test_manifest_hooks(tempdir_factory, store):
     )
 
 
-@pytest.mark.parametrize(
-    'repo',
-    (
-        'dotnet_hooks_csproj_repo',
-        'dotnet_hooks_sln_repo',
-        'dotnet_hooks_combo_repo',
-        'dotnet_hooks_csproj_prefix_repo',
-    ),
-)
-def test_dotnet_hook(tempdir_factory, store, repo):
-    _test_hook_repo(
-        tempdir_factory, store, repo,
-        'dotnet-example-hook', [], b'Hello from dotnet!\n',
-    )
-
-
 def test_non_installable_hook_error_for_language_version(store, caplog):
     config = {
         'repo': 'local',

tests/staged_files_only_test.py

@@ -1,12 +1,15 @@
 from __future__ import annotations
 
+import contextlib
 import itertools
 import os.path
 import shutil
 
 import pytest
+import re_assert
 
 from pre_commit import git
+from pre_commit.errors import FatalError
 from pre_commit.staged_files_only import staged_files_only
 from pre_commit.util import cmd_output
 from testing.auto_namedtuple import auto_namedtuple
@@ -14,6 +17,7 @@ from testing.fixtures import git_dir
 from testing.util import cwd
 from testing.util import get_resource_path
 from testing.util import git_commit
+from testing.util import xfailif_windows
 
 
 FOO_CONTENTS = '\n'.join(('1', '2', '3', '4', '5', '6', '7', '8', ''))
@@ -382,3 +386,49 @@ def test_intent_to_add(in_git_dir, patch_dir):
     with staged_files_only(patch_dir):
         assert_no_diff()
     assert git.intent_to_add_files() == ['foo']
+
+
+@contextlib.contextmanager
+def _unreadable(f):
+    orig = os.stat(f).st_mode
+    os.chmod(f, 0o000)
+    try:
+        yield
+    finally:
+        os.chmod(f, orig)
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_failed_diff_does_not_discard_changes(in_git_dir, patch_dir):
+    # stage 3 files
+    for i in range(3):
+        with open(str(i), 'w') as f:
+            f.write(str(i))
+    cmd_output('git', 'add', '0', '1', '2')
+
+    # modify all of their contents
+    for i in range(3):
+        with open(str(i), 'w') as f:
+            f.write('new contents')
+
+    with _unreadable('1'):
+        with pytest.raises(FatalError) as excinfo:
+            with staged_files_only(patch_dir):
+                raise AssertionError('should have errored on enter')
+
+    # the diff command failed to produce a diff of `1`
+    msg, = excinfo.value.args
+    re_assert.Matches(
+        r'^pre-commit failed to diff -- perhaps due to permissions\?\n\n'
+        r'command: .*\n'
+        r'return code: 128\n'
+        r'stdout: \(none\)\n'
+        r'stderr:\n'
+        r'    error: open\("1"\): Permission denied\n'
+        r'    fatal: cannot hash 1$',
+    ).assert_matches(msg)
+
+    # even though it errored, the unstaged changes should still be present
+    for i in range(3):
+        with open(str(i)) as f:
+            assert f.read() == 'new contents'

tests/store_test.py

@@ -180,7 +180,7 @@ def test_create_when_store_already_exists(store):
 
 def test_db_repo_name(store):
     assert store.db_repo_name('repo', ()) == 'repo'
-    assert store.db_repo_name('repo', ('b', 'a', 'c')) == 'repo:a,b,c'
+    assert store.db_repo_name('repo', ('b', 'a', 'c')) == 'repo:b,a,c'
 
 
 def test_local_resources_reflects_reality():
@@ -246,3 +246,27 @@ def test_mark_config_as_used_readonly(tmpdir):
     # should be skipped due to readonly
     store.mark_config_used(str(cfg))
     assert store.select_all_configs() == []
+
+
+def test_clone_with_recursive_submodules(store, tmp_path):
+    sub = tmp_path.joinpath('sub')
+    sub.mkdir()
+    sub.joinpath('submodule').write_text('i am a submodule')
+    cmd_output('git', '-C', str(sub), 'init', '.')
+    cmd_output('git', '-C', str(sub), 'add', '.')
+    git.commit(str(sub))
+
+    repo = tmp_path.joinpath('repo')
+    repo.mkdir()
+    repo.joinpath('repository').write_text('i am a repo')
+    cmd_output('git', '-C', str(repo), 'init', '.')
+    cmd_output('git', '-C', str(repo), 'add', '.')
+    cmd_output('git', '-C', str(repo), 'submodule', 'add', str(sub), 'sub')
+    git.commit(str(repo))
+
+    rev = git.head_rev(str(repo))
+    ret = store.clone(str(repo), rev)
+
+    assert os.path.exists(ret)
+    assert os.path.exists(os.path.join(ret, str(repo), 'repository'))
+    assert os.path.exists(os.path.join(ret, str(sub), 'submodule'))

tests/util_test.py

@@ -16,7 +16,7 @@ from pre_commit.util import rmtree
 
 
 def test_CalledProcessError_str():
-    error = CalledProcessError(1, ('exe',), b'output', b'errors')
+    error = CalledProcessError(1, ('exe',), b'output\n', b'errors\n')
     assert str(error) == (
         "command: ('exe',)\n"
         'return code: 1\n'

tox.ini

@@ -6,8 +6,8 @@ deps = -rrequirements-dev.txt
 passenv = *
 commands =
     coverage erase
-    coverage run -m pytest {posargs:tests}
+    coverage run -m pytest {posargs:tests} --ignore=tests/languages
-    coverage report
+    coverage report --omit=pre_commit/languages/*,tests/languages/*
 
 [testenv:pre-commit]
 skip_install = true