Adding upstream version 2.2.0.

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

pre_commit/languages/perl.py

@@ -0,0 +1,67 @@
+import contextlib
+import os
+import shlex
+from typing import Generator
+from typing import Sequence
+from typing import Tuple
+
+from pre_commit.envcontext import envcontext
+from pre_commit.envcontext import PatchesT
+from pre_commit.envcontext import Var
+from pre_commit.hook import Hook
+from pre_commit.languages import helpers
+from pre_commit.prefix import Prefix
+from pre_commit.util import clean_path_on_failure
+
+ENVIRONMENT_DIR = 'perl_env'
+get_default_version = helpers.basic_get_default_version
+healthy = helpers.basic_healthy
+
+
+def _envdir(prefix: Prefix, version: str) -> str:
+    directory = helpers.environment_dir(ENVIRONMENT_DIR, version)
+    return prefix.path(directory)
+
+
+def get_env_patch(venv: str) -> PatchesT:
+    return (
+        ('PATH', (os.path.join(venv, 'bin'), os.pathsep, Var('PATH'))),
+        ('PERL5LIB', os.path.join(venv, 'lib', 'perl5')),
+        ('PERL_MB_OPT', f'--install_base {shlex.quote(venv)}'),
+        (
+            'PERL_MM_OPT', (
+                f'INSTALL_BASE={shlex.quote(venv)} '
+                f'INSTALLSITEMAN1DIR=none INSTALLSITEMAN3DIR=none'
+            ),
+        ),
+    )
+
+
+@contextlib.contextmanager
+def in_env(
+        prefix: Prefix,
+        language_version: str,
+) -> Generator[None, None, None]:
+    with envcontext(get_env_patch(_envdir(prefix, language_version))):
+        yield
+
+
+def install_environment(
+        prefix: Prefix, version: str, additional_dependencies: Sequence[str],
+) -> None:
+    helpers.assert_version_default('perl', version)
+
+    with clean_path_on_failure(_envdir(prefix, version)):
+        with in_env(prefix, version):
+            helpers.run_setup_cmd(
+                prefix, ('cpan', '-T', '.', *additional_dependencies),
+            )
+
+
+def run_hook(
+        hook: Hook,
+        file_args: Sequence[str],
+        color: bool,
+) -> Tuple[int, bytes]:
+    with in_env(hook.prefix, hook.language_version):
+        return helpers.run_xargs(hook, hook.cmd, file_args, color=color)