Adding upstream version 2.2.0.

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

testing/auto_namedtuple.py

@@ -0,0 +1,11 @@
+import collections
+
+
+def auto_namedtuple(classname='auto_namedtuple', **kwargs):
+    """Returns an automatic namedtuple object.
+
+    Args:
+        classname - The class name for the returned object.
+        **kwargs - Properties to give the returned object.
+    """
+    return (collections.namedtuple(classname, kwargs.keys())(**kwargs))

testing/fixtures.py

@@ -0,0 +1,146 @@
+import contextlib
+import os.path
+import shutil
+
+from cfgv import apply_defaults
+from cfgv import validate
+
+import pre_commit.constants as C
+from pre_commit import git
+from pre_commit.clientlib import CONFIG_SCHEMA
+from pre_commit.clientlib import load_manifest
+from pre_commit.util import cmd_output
+from pre_commit.util import yaml_dump
+from pre_commit.util import yaml_load
+from testing.util import get_resource_path
+from testing.util import git_commit
+
+
+def copy_tree_to_path(src_dir, dest_dir):
+    """Copies all of the things inside src_dir to an already existing dest_dir.
+
+    This looks eerily similar to shutil.copytree, but copytree has no option
+    for not creating dest_dir.
+    """
+    names = os.listdir(src_dir)
+
+    for name in names:
+        srcname = os.path.join(src_dir, name)
+        destname = os.path.join(dest_dir, name)
+
+        if os.path.isdir(srcname):
+            shutil.copytree(srcname, destname)
+        else:
+            shutil.copy(srcname, destname)
+
+
+def git_dir(tempdir_factory):
+    path = tempdir_factory.get()
+    cmd_output('git', 'init', path)
+    return path
+
+
+def make_repo(tempdir_factory, repo_source):
+    path = git_dir(tempdir_factory)
+    copy_tree_to_path(get_resource_path(repo_source), path)
+    cmd_output('git', 'add', '.', cwd=path)
+    git_commit(msg=make_repo.__name__, cwd=path)
+    return path
+
+
+@contextlib.contextmanager
+def modify_manifest(path, commit=True):
+    """Modify the manifest yielded by this context to write to
+    .pre-commit-hooks.yaml.
+    """
+    manifest_path = os.path.join(path, C.MANIFEST_FILE)
+    with open(manifest_path) as f:
+        manifest = yaml_load(f.read())
+    yield manifest
+    with open(manifest_path, 'w') as manifest_file:
+        manifest_file.write(yaml_dump(manifest))
+    if commit:
+        git_commit(msg=modify_manifest.__name__, cwd=path)
+
+
+@contextlib.contextmanager
+def modify_config(path='.', commit=True):
+    """Modify the config yielded by this context to write to
+    .pre-commit-config.yaml
+    """
+    config_path = os.path.join(path, C.CONFIG_FILE)
+    with open(config_path) as f:
+        config = yaml_load(f.read())
+    yield config
+    with open(config_path, 'w', encoding='UTF-8') as config_file:
+        config_file.write(yaml_dump(config))
+    if commit:
+        git_commit(msg=modify_config.__name__, cwd=path)
+
+
+def sample_local_config():
+    return {
+        'repo': 'local',
+        'hooks': [{
+            'id': 'do_not_commit',
+            'name': 'Block if "DO NOT COMMIT" is found',
+            'entry': 'DO NOT COMMIT',
+            'language': 'pygrep',
+        }],
+    }
+
+
+def sample_meta_config():
+    return {'repo': 'meta', 'hooks': [{'id': 'check-useless-excludes'}]}
+
+
+def make_config_from_repo(repo_path, rev=None, hooks=None, check=True):
+    manifest = load_manifest(os.path.join(repo_path, C.MANIFEST_FILE))
+    config = {
+        'repo': f'file://{repo_path}',
+        'rev': rev or git.head_rev(repo_path),
+        'hooks': hooks or [{'id': hook['id']} for hook in manifest],
+    }
+
+    if check:
+        wrapped = validate({'repos': [config]}, CONFIG_SCHEMA)
+        wrapped = apply_defaults(wrapped, CONFIG_SCHEMA)
+        config, = wrapped['repos']
+        return config
+    else:
+        return config
+
+
+def read_config(directory, config_file=C.CONFIG_FILE):
+    config_path = os.path.join(directory, config_file)
+    with open(config_path) as f:
+        config = yaml_load(f.read())
+    return config
+
+
+def write_config(directory, config, config_file=C.CONFIG_FILE):
+    if type(config) is not list and 'repos' not in config:
+        assert isinstance(config, dict), config
+        config = {'repos': [config]}
+    with open(os.path.join(directory, config_file), 'w') as outfile:
+        outfile.write(yaml_dump(config))
+
+
+def add_config_to_repo(git_path, config, config_file=C.CONFIG_FILE):
+    write_config(git_path, config, config_file=config_file)
+    cmd_output('git', 'add', config_file, cwd=git_path)
+    git_commit(msg=add_config_to_repo.__name__, cwd=git_path)
+    return git_path
+
+
+def remove_config_from_repo(git_path, config_file=C.CONFIG_FILE):
+    cmd_output('git', 'rm', config_file, cwd=git_path)
+    git_commit(msg=remove_config_from_repo.__name__, cwd=git_path)
+    return git_path
+
+
+def make_consuming_repo(tempdir_factory, repo_source):
+    path = make_repo(tempdir_factory, repo_source)
+    config = make_config_from_repo(path)
+    git_path = git_dir(tempdir_factory)
+    return add_config_to_repo(git_path, config)

testing/gen-languages-all

@@ -0,0 +1,28 @@
+#!/usr/bin/env python3
+import sys
+
+LANGUAGES = [
+    'conda', 'docker', 'docker_image', 'fail', 'golang', 'node', 'perl',
+    'pygrep', 'python', 'python_venv', 'ruby', 'rust', 'script', 'swift',
+    'system',
+]
+FIELDS = [
+    'ENVIRONMENT_DIR', 'get_default_version', 'healthy', 'install_environment',
+    'run_hook',
+]
+
+
+def main() -> int:
+    print(f'    # BEGIN GENERATED ({sys.argv[0]})')
+    for lang in LANGUAGES:
+        parts = [f'    {lang!r}: Language(name={lang!r}']
+        for k in FIELDS:
+            parts.append(f', {k}={lang}.{k}')
+        parts.append('),  # noqa: E501')
+        print(''.join(parts))
+    print('    # END GENERATED')
+    return 0
+
+
+if __name__ == '__main__':
+    exit(main())

testing/get-swift.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# This is a script used in CI to install swift
+set -euxo pipefail
+
+. /etc/lsb-release
+if [ "$DISTRIB_CODENAME" = "bionic" ]; then
+    SWIFT_URL='https://swift.org/builds/swift-5.1.3-release/ubuntu1804/swift-5.1.3-RELEASE/swift-5.1.3-RELEASE-ubuntu18.04.tar.gz'
+    SWIFT_HASH='ac82ccd773fe3d586fc340814e31e120da1ff695c6a712f6634e9cc720769610'
+else
+    echo "unknown dist: ${DISTRIB_CODENAME}" 1>&2
+    exit 1
+fi
+
+check() {
+    echo "$SWIFT_HASH  $TGZ" | sha256sum --check
+}
+
+TGZ="$HOME/.swift/swift.tar.gz"
+mkdir -p "$(dirname "$TGZ")"
+if ! check >& /dev/null; then
+    rm -f "$TGZ"
+    curl --location --silent --output "$TGZ" "$SWIFT_URL"
+    check
+fi
+
+mkdir -p /tmp/swift
+tar -xf "$TGZ" --strip 1 --directory /tmp/swift

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

@@ -0,0 +1,5 @@
+-   id: hook
+    name: hook
+    entry: ./hook.sh
+    language: script
+    files: \.py$

testing/resources/arbitrary_bytes_repo/hook.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# Intentionally write mixed encoding to the output.  This should not crash
+# pre-commit and should write bytes to the output.
+# '☃'.encode() + '²'.encode('latin1')
+echo -e '\xe2\x98\x83\xb2'
+# exit 1 to trigger printing
+exit 1

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

@@ -0,0 +1,6 @@
+-   id: arg-per-line
+    name: Args per line hook
+    entry: bin/hook.sh
+    language: script
+    files: ''
+    args: [hello, world]

testing/resources/arg_per_line_hooks_repo/bin/hook.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+for i in "$@"; do
+    echo "arg: $i"
+done

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

@@ -0,0 +1,10 @@
+-   id: sys-exec
+    name: sys-exec
+    entry: python -c 'import os; import sys; print(sys.executable.split(os.path.sep)[-2]) if os.name == "nt" else print(sys.executable.split(os.path.sep)[-3])'
+    language: conda
+    files: \.py$
+-   id: additional-deps
+    name: additional-deps
+    entry: python
+    language: conda
+    files: \.py$

testing/resources/conda_hooks_repo/environment.yml

@@ -0,0 +1,6 @@
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python
+  - pip

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

@@ -0,0 +1,17 @@
+-   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

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

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

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

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

@@ -0,0 +1,6 @@
+-   id: python-files
+    name: Python files
+    entry: bin/hook.sh
+    language: script
+    types: [python]
+    exclude_types: [python3]

testing/resources/exclude_types_repo/bin/hook.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+echo $@
+exit 1

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

@@ -0,0 +1,5 @@
+-   id: failing_hook
+    name: Failing hook
+    entry: bin/hook.sh
+    language: script
+    files: .

testing/resources/failing_hook_repo/bin/hook.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+echo 'Fail'
+echo $@
+exit 1

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

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

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

@@ -0,0 +1,17 @@
+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)
+}

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

@@ -0,0 +1,6 @@
+-   id: logfile test hook
+    name: Logfile test hook
+    entry: bin/hook.sh
+    language: script
+    files: .
+    log_file: test.log

testing/resources/logfile_repo/bin/hook.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+echo "This is STDOUT output"
+echo "This is STDERR output" 1>&2
+
+exit 1

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

@@ -0,0 +1,15 @@
+-   id: bash_hook
+    name: Bash hook
+    entry: bin/hook.sh
+    language: script
+    files: 'foo.py'
+-   id: bash_hook2
+    name: Bash hook
+    entry: bin/hook2.sh
+    language: script
+    files: ''
+-   id: bash_hook3
+    name: Bash hook
+    entry: bin/hook3.sh
+    language: script
+    files: 'bar.py'

testing/resources/modified_file_returns_zero_repo/bin/hook.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+for f in $@; do
+    # Non UTF-8 bytes
+    echo -e '\x01\x97' > "$f"
+    echo "Modified: $f!"
+done

testing/resources/modified_file_returns_zero_repo/bin/hook2.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+echo $@

testing/resources/modified_file_returns_zero_repo/bin/hook3.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+for f in $@; do
+    # Non UTF-8 bytes
+    echo -e '\x01\x97' > "$f"
+done

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

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

testing/resources/node_hooks_repo/bin/main.js

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+
+console.log('Hello World');

testing/resources/node_hooks_repo/package.json

@@ -0,0 +1,5 @@
+{
+    "name": "foo",
+    "version": "0.0.1",
+    "bin": {"foo": "./bin/main.js"}
+}

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

@@ -0,0 +1,6 @@
+-   id: versioned-node-hook
+    name: Versioned node hook
+    entry: versioned-node-hook
+    language: node
+    language_version: 9.3.0
+    files: \.js$

testing/resources/node_versioned_hooks_repo/bin/main.js

@@ -0,0 +1,4 @@
+#!/usr/bin/env node
+
+console.log(process.version);
+console.log('Hello World');

testing/resources/node_versioned_hooks_repo/package.json

@@ -0,0 +1,5 @@
+{
+    "name": "versioned-node-hook",
+    "version": "0.0.1",
+    "bin": {"versioned-node-hook": "./bin/main.js"}
+}

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

@@ -0,0 +1,5 @@
+-   id: not-found-exe
+    name: Not found exe
+    entry: i-dont-exist-lol
+    language: system
+    files: ''

testing/resources/perl_hooks_repo/.gitignore

@@ -0,0 +1,7 @@
+/MYMETA.json
+/MYMETA.yml
+/Makefile
+/PreCommitHello-*.tar.*
+/PreCommitHello-*/
+/blib/
+/pm_to_blib

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

@@ -0,0 +1,5 @@
+-   id: perl-hook
+    name: perl example hook
+    entry: pre-commit-perl-hello
+    language: perl
+    files: ''

testing/resources/perl_hooks_repo/MANIFEST

@@ -0,0 +1,4 @@
+MANIFEST
+Makefile.PL
+bin/pre-commit-perl-hello
+lib/PreCommitHello.pm

testing/resources/perl_hooks_repo/Makefile.PL

@@ -0,0 +1,10 @@
+use strict;
+use warnings;
+
+use ExtUtils::MakeMaker;
+
+WriteMakefile(
+    NAME => "PreCommitHello",
+    VERSION_FROM => "lib/PreCommitHello.pm",
+    EXE_FILES => [qw(bin/pre-commit-perl-hello)],
+);

testing/resources/perl_hooks_repo/bin/pre-commit-perl-hello

@@ -0,0 +1,7 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use PreCommitHello;
+
+PreCommitHello::hello();

testing/resources/perl_hooks_repo/lib/PreCommitHello.pm

@@ -0,0 +1,12 @@
+package PreCommitHello;
+
+use strict;
+use warnings;
+
+our $VERSION = "0.1.0";
+
+sub hello {
+    print "Hello from perl-commit Perl!\n";
+}
+
+1;

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

@@ -0,0 +1,5 @@
+-   id: prints_cwd
+    name: Prints Cwd
+    entry: pwd
+    language: system
+    files: \.sh$

testing/resources/python3_hooks_repo/.pre-commit-hooks.yaml

@@ -0,0 +1,6 @@
+-   id: python3-hook
+    name: Python 3 Hook
+    entry: python3-hook
+    language: python
+    language_version: python3
+    files: \.py$

testing/resources/python3_hooks_repo/py3_hook.py

@@ -0,0 +1,8 @@
+import sys
+
+
+def main():
+    print(sys.version_info[0])
+    print(repr(sys.argv[1:]))
+    print('Hello World')
+    return 0

testing/resources/python3_hooks_repo/setup.py

@@ -0,0 +1,8 @@
+from setuptools import setup
+
+setup(
+    name='python3_hook',
+    version='0.0.0',
+    py_modules=['py3_hook'],
+    entry_points={'console_scripts': ['python3-hook = py3_hook:main']},
+)

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

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

testing/resources/python_hooks_repo/foo.py

@@ -0,0 +1,7 @@
+import sys
+
+
+def main():
+    print(repr(sys.argv[1:]))
+    print('Hello World')
+    return 0

testing/resources/python_hooks_repo/setup.py

@@ -0,0 +1,8 @@
+from setuptools import setup
+
+setup(
+    name='foo',
+    version='0.0.0',
+    py_modules=['foo'],
+    entry_points={'console_scripts': ['foo = foo:main']},
+)

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

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

testing/resources/python_venv_hooks_repo/foo.py

@@ -0,0 +1,7 @@
+import sys
+
+
+def main():
+    print(repr(sys.argv[1:]))
+    print('Hello World')
+    return 0

testing/resources/python_venv_hooks_repo/setup.py

@@ -0,0 +1,8 @@
+from setuptools import setup
+
+setup(
+    name='foo',
+    version='0.0.0',
+    py_modules=['foo'],
+    entry_points={'console_scripts': ['foo = foo:main']},
+)

testing/resources/ruby_hooks_repo/.gitignore

@@ -0,0 +1 @@
+*.gem

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

@@ -0,0 +1,5 @@
+-   id: ruby_hook
+    name: Ruby Hook
+    entry: ruby_hook
+    language: ruby
+    files: \.rb$

testing/resources/ruby_hooks_repo/bin/ruby_hook

@@ -0,0 +1,3 @@
+#!/usr/bin/env ruby
+
+puts 'Hello world from a ruby hook'

testing/resources/ruby_hooks_repo/ruby_hook.gemspec

@@ -0,0 +1,9 @@
+Gem::Specification.new do |s|
+    s.name = 'ruby_hook'
+    s.version = '0.1.0'
+    s.authors = ['Anthony Sottile']
+    s.summary = 'A ruby hook!'
+    s.description = 'A ruby hook!'
+    s.files = ['bin/ruby_hook']
+    s.executables = ['ruby_hook']
+end

testing/resources/ruby_versioned_hooks_repo/.gitignore

@@ -0,0 +1 @@
+*.gem

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

@@ -0,0 +1,6 @@
+-   id: ruby_hook
+    name: Ruby Hook
+    entry: ruby_hook
+    language: ruby
+    language_version: 2.5.1
+    files: \.rb$

testing/resources/ruby_versioned_hooks_repo/bin/ruby_hook

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+
+puts RUBY_VERSION
+puts 'Hello world from a ruby hook'

testing/resources/ruby_versioned_hooks_repo/ruby_hook.gemspec

@@ -0,0 +1,9 @@
+Gem::Specification.new do |s|
+    s.name = 'ruby_hook'
+    s.version = '0.1.0'
+    s.authors = ['Anthony Sottile']
+    s.summary = 'A ruby hook!'
+    s.description = 'A ruby hook!'
+    s.files = ['bin/ruby_hook']
+    s.executables = ['ruby_hook']
+end

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

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

testing/resources/rust_hooks_repo/Cargo.lock

@@ -0,0 +1,3 @@
+[[package]]
+name = "rust-hello-world"
+version = "0.1.0"

testing/resources/rust_hooks_repo/Cargo.toml

@@ -0,0 +1,3 @@
+[package]
+name = "rust-hello-world"
+version = "0.1.0"

testing/resources/rust_hooks_repo/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("hello world");
+}

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

@@ -0,0 +1,5 @@
+-   id: bash_hook
+    name: Bash hook
+    entry: bin/hook.sh
+    language: script
+    files: ''

testing/resources/script_hooks_repo/bin/hook.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+echo $@
+echo 'Hello World'

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

@@ -0,0 +1,8 @@
+-   id: stdout-stderr
+    name: stdout-stderr
+    language: script
+    entry: ./stdout-stderr-entry
+-   id: tty-check
+    name: tty-check
+    language: script
+    entry: ./tty-check-entry

testing/resources/stdout_stderr_repo/stdout-stderr-entry

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+echo 0
+echo 1 1>&2
+echo 2
+echo 3 1>&2
+echo 4
+echo 5 1>&2

testing/resources/stdout_stderr_repo/tty-check-entry

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+t() {
+    if [ -t "$1" ]; then
+        echo "$2: True"
+    else
+        echo "$2: False"
+    fi
+}
+t 0 stdin
+t 1 stdout
+t 2 stderr

testing/resources/swift_hooks_repo/.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+/.build
+/Packages
+/*.xcodeproj

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

@@ -0,0 +1,6 @@
+-   id: swift-hooks-repo
+    name: Swift hooks repo example
+    description: Runs the hello world app generated by swift package init --type executable (binary called swift_hooks_repo here)
+    entry: swift_hooks_repo
+    language: swift
+    files: \.(swift)$

testing/resources/swift_hooks_repo/Package.swift

@@ -0,0 +1,7 @@
+// swift-tools-version:5.0
+import PackageDescription
+
+let package = Package(
+    name: "swift_hooks_repo",
+    targets: [.target(name: "swift_hooks_repo")]
+)

testing/resources/swift_hooks_repo/Sources/swift_hooks_repo/main.swift

@@ -0,0 +1 @@
+print("Hello, world!")

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

@@ -0,0 +1,5 @@
+-   id: system-hook-with-spaces
+    name: System hook with spaces
+    entry: bash -c 'echo "Hello World"'
+    language: system
+    files: \.sh$

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

@@ -0,0 +1,5 @@
+-   id: python-files
+    name: Python files
+    entry: bin/hook.sh
+    language: script
+    types: [python]

testing/resources/types_repo/bin/hook.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+echo $@
+exit 1

testing/util.py

@@ -0,0 +1,113 @@
+import contextlib
+import os.path
+import subprocess
+
+import pytest
+
+from pre_commit import parse_shebang
+from pre_commit.languages.docker import docker_is_running
+from pre_commit.util import cmd_output
+from testing.auto_namedtuple import auto_namedtuple
+
+
+TESTING_DIR = os.path.abspath(os.path.dirname(__file__))
+
+
+def get_resource_path(path):
+    return os.path.join(TESTING_DIR, 'resources', path)
+
+
+def cmd_output_mocked_pre_commit_home(
+        *args, tempdir_factory, pre_commit_home=None, env=None, **kwargs,
+):
+    if pre_commit_home is None:
+        pre_commit_home = tempdir_factory.get()
+    env = env if env is not None else os.environ
+    kwargs.setdefault('stderr', subprocess.STDOUT)
+    # Don't want to write to the home directory
+    env = dict(env, PRE_COMMIT_HOME=pre_commit_home)
+    ret, out, _ = cmd_output(*args, env=env, **kwargs)
+    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",
+)
+skipif_cant_run_swift = pytest.mark.skipif(
+    parse_shebang.find_executable('swift') is None,
+    reason="swift isn't installed or can't be found",
+)
+xfailif_windows_no_ruby = pytest.mark.xfail(
+    os.name == 'nt',
+    reason='Ruby support not yet implemented on windows.',
+)
+xfailif_windows = pytest.mark.xfail(os.name == 'nt', reason='windows')
+
+
+def supports_venv():  # pragma: no cover (platform specific)
+    try:
+        __import__('ensurepip')
+        __import__('venv')
+        return True
+    except ImportError:
+        return False
+
+
+xfailif_no_venv = pytest.mark.xfail(
+    not supports_venv(), reason='Does not support venv module',
+)
+
+
+def run_opts(
+        all_files=False,
+        files=(),
+        color=False,
+        verbose=False,
+        hook=None,
+        from_ref='',
+        to_ref='',
+        remote_name='',
+        remote_url='',
+        hook_stage='commit',
+        show_diff_on_failure=False,
+        commit_msg_filename='',
+        checkout_type='',
+):
+    # These are mutually exclusive
+    assert not (all_files and files)
+    return auto_namedtuple(
+        all_files=all_files,
+        files=files,
+        color=color,
+        verbose=verbose,
+        hook=hook,
+        from_ref=from_ref,
+        to_ref=to_ref,
+        remote_name=remote_name,
+        remote_url=remote_url,
+        hook_stage=hook_stage,
+        show_diff_on_failure=show_diff_on_failure,
+        commit_msg_filename=commit_msg_filename,
+        checkout_type=checkout_type,
+    )
+
+
+@contextlib.contextmanager
+def cwd(path):
+    original_cwd = os.getcwd()
+    os.chdir(path)
+    try:
+        yield
+    finally:
+        os.chdir(original_cwd)
+
+
+def git_commit(*args, fn=cmd_output, msg='commit!', **kwargs):
+    kwargs.setdefault('stderr', subprocess.STDOUT)
+
+    cmd = ('git', 'commit', '--allow-empty', '--no-gpg-sign', '-a') + args
+    if msg is not None:  # allow skipping `-m` with `msg=None`
+        cmd += ('-m', msg)
+    ret, out, _ = fn(*cmd, **kwargs)
+    return ret, out.replace('\r\n', '\n')