Merging upstream version 3.1.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

21 files changed, 158 insertions, 415 deletions

diff --git a/pre_commit/languages/all.py b/pre_commit/languages/all.py
deleted file mode 100644
index d952ae1..0000000
--- a/pre_commit/languages/all.py
+++ /dev/null
@@ -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)
diff --git a/pre_commit/languages/conda.py b/pre_commit/languages/conda.py
index e2fb019..05f1d29 100644
--- a/pre_commit/languages/conda.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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,
diff --git a/pre_commit/languages/coursier.py b/pre_commit/languages/coursier.py
index 6075758..9c5fbfe 100644
--- a/pre_commit/languages/coursier.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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))
-        helpers.run_setup_cmd(prefix, (cs, 'install', '--dir', envdir, *opts))
+        lang_base.setup_cmd(prefix, (cs, 'fetch', *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
diff --git a/pre_commit/languages/dart.py b/pre_commit/languages/dart.py
index e3c1c58..e8539ca 100644
--- a/pre_commit/languages/dart.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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},
diff --git a/pre_commit/languages/docker.py b/pre_commit/languages/docker.py
index e80c959..8e53ca9 100644
--- a/pre_commit/languages/docker.py
+++ b/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
-health_check = helpers.basic_health_check
-in_env = helpers.no_env  # no special environment for docker
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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)
-    helpers.assert_no_additional_deps('docker', additional_dependencies)
+    lang_base.assert_version_default('docker', version)
+    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 helpers.run_xargs(
-        cmd,
+    return lang_base.run_xargs(
+        (*docker_cmd(), *entry_tag, *cmd_rest),
         file_args,
         require_serial=require_serial,
         color=color,
diff --git a/pre_commit/languages/docker_image.py b/pre_commit/languages/docker_image.py
index 8e5f2c0..26f006e 100644
--- a/pre_commit/languages/docker_image.py
+++ b/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
-health_check = helpers.basic_health_check
-install_environment = helpers.no_install
-in_env = helpers.no_env
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+install_environment = lang_base.no_install
+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)
-    return helpers.run_xargs(
+    cmd = docker_cmd() + lang_base.hook_cmd(entry, args)
+    return lang_base.run_xargs(
         cmd,
         file_args,
         require_serial=require_serial,
diff --git a/pre_commit/languages/dotnet.py b/pre_commit/languages/dotnet.py
index 4c3955e..e9568f2 100644
--- a/pre_commit/languages/dotnet.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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)
-    helpers.assert_no_additional_deps('dotnet', additional_dependencies)
+    lang_base.assert_version_default('dotnet', version)
+    lang_base.assert_no_additional_deps('dotnet', additional_dependencies)
 
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
-    build_dir = 'pre-commit-build'
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    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)
diff --git a/pre_commit/languages/fail.py b/pre_commit/languages/fail.py
index 33df067..a8ec6a5 100644
--- a/pre_commit/languages/fail.py
+++ b/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
-health_check = helpers.basic_health_check
-install_environment = helpers.no_install
-in_env = helpers.no_env
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+install_environment = lang_base.no_install
+in_env = lang_base.no_env
 
 
 def run_hook(
diff --git a/pre_commit/languages/golang.py b/pre_commit/languages/golang.py
index 3c4b652..bea91e9 100644
--- a/pre_commit/languages/golang.py
+++ b/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
-run_hook = helpers.basic_run_hook
+health_check = lang_base.basic_health_check
+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')
diff --git a/pre_commit/languages/helpers.py b/pre_commit/languages/helpers.py
deleted file mode 100644
index d1be409..0000000
--- a/pre_commit/languages/helpers.py
+++ /dev/null
@@ -1,158 +0,0 @@
-from __future__ import annotations
-
-import contextlib
-import multiprocessing
-import os
-import random
-import re
-import shlex
-from typing import Any
-from typing import Generator
-from typing import NoReturn
-from typing import Sequence
-
-import pre_commit.constants as C
-from pre_commit import parse_shebang
-from pre_commit.prefix import Prefix
-from pre_commit.util import cmd_output_b
-from pre_commit.xargs import xargs
-
-FIXED_RANDOM_SEED = 1542676187
-
-SHIMS_RE = re.compile(r'[/\\]shims[/\\]')
-
-
-def exe_exists(exe: str) -> bool:
-    found = parse_shebang.find_executable(exe)
-    if found is None:  # exe exists
-        return False
-
-    homedir = os.path.expanduser('~')
-    try:
-        common: str | None = os.path.commonpath((found, homedir))
-    except ValueError:  # on windows, different drives raises ValueError
-        common = None
-
-    return (
-        # it is not in a /shims/ directory
-        not SHIMS_RE.search(found) and
-        (
-            # the homedir is / (docker, service user, etc.)
-            os.path.dirname(homedir) == homedir or
-            # the exe is not contained in the home directory
-            common != homedir
-        )
-    )
-
-
-def run_setup_cmd(prefix: Prefix, cmd: tuple[str, ...], **kwargs: Any) -> None:
-    cmd_output_b(*cmd, cwd=prefix.prefix_dir, **kwargs)
-
-
-def environment_dir(prefix: Prefix, d: str, language_version: str) -> str:
-    return prefix.path(f'{d}-{language_version}')
-
-
-def assert_version_default(binary: str, version: str) -> None:
-    if version != C.DEFAULT:
-        raise AssertionError(
-            f'for now, pre-commit requires system-installed {binary} -- '
-            f'you selected `language_version: {version}`',
-        )
-
-
-def assert_no_additional_deps(
-        lang: str,
-        additional_deps: Sequence[str],
-) -> None:
-    if additional_deps:
-        raise AssertionError(
-            f'for now, pre-commit does not support '
-            f'additional_dependencies for {lang} -- '
-            f'you selected `additional_dependencies: {additional_deps}`',
-        )
-
-
-def basic_get_default_version() -> str:
-    return C.DEFAULT
-
-
-def basic_health_check(prefix: Prefix, language_version: str) -> str | None:
-    return None
-
-
-def no_install(
-        prefix: Prefix,
-        version: str,
-        additional_dependencies: Sequence[str],
-) -> NoReturn:
-    raise AssertionError('This language is not installable')
-
-
-@contextlib.contextmanager
-def no_env(prefix: Prefix, version: str) -> Generator[None, None, None]:
-    yield
-
-
-def target_concurrency() -> int:
-    if 'PRE_COMMIT_NO_CONCURRENCY' in os.environ:
-        return 1
-    else:
-        # Travis appears to have a bunch of CPUs, but we can't use them all.
-        if 'TRAVIS' in os.environ:
-            return 2
-        else:
-            try:
-                return multiprocessing.cpu_count()
-            except NotImplementedError:
-                return 1
-
-
-def _shuffled(seq: Sequence[str]) -> list[str]:
-    """Deterministically shuffle"""
-    fixed_random = random.Random()
-    fixed_random.seed(FIXED_RANDOM_SEED, version=1)
-
-    seq = list(seq)
-    fixed_random.shuffle(seq)
-    return seq
-
-
-def run_xargs(
-        cmd: tuple[str, ...],
-        file_args: Sequence[str],
-        *,
-        require_serial: bool,
-        color: bool,
-) -> tuple[int, bytes]:
-    if require_serial:
-        jobs = 1
-    else:
-        # Shuffle the files so that they more evenly fill out the xargs
-        # partitions, but do it deterministically in case a hook cares about
-        # ordering.
-        file_args = _shuffled(file_args)
-        jobs = target_concurrency()
-    return xargs(cmd, file_args, target_concurrency=jobs, color=color)
-
-
-def hook_cmd(entry: str, args: Sequence[str]) -> tuple[str, ...]:
-    return (*shlex.split(entry), *args)
-
-
-def basic_run_hook(
-        prefix: Prefix,
-        entry: str,
-        args: Sequence[str],
-        file_args: Sequence[str],
-        *,
-        is_local: bool,
-        require_serial: bool,
-        color: bool,
-) -> tuple[int, bytes]:
-    return run_xargs(
-        hook_cmd(entry, args),
-        file_args,
-        require_serial=require_serial,
-        color=color,
-    )
diff --git a/pre_commit/languages/lua.py b/pre_commit/languages/lua.py
index ffc40b5..12d0661 100644
--- a/pre_commit/languages/lua.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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)
diff --git a/pre_commit/languages/node.py b/pre_commit/languages/node.py
index 9688da3..66d6136 100644
--- a/pre_commit/languages/node.py
+++ b/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:
-    with in_env(prefix, language_version):
+def health_check(prefix: Prefix, version: str) -> str | None:
+    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
diff --git a/pre_commit/languages/perl.py b/pre_commit/languages/perl.py
index 2530c0e..2a7f162 100644
--- a/pre_commit/languages/perl.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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),
         )
diff --git a/pre_commit/languages/pygrep.py b/pre_commit/languages/pygrep.py
index f0eb9a9..ec55560 100644
--- a/pre_commit/languages/pygrep.py
+++ b/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
-health_check = helpers.basic_health_check
-install_environment = helpers.no_install
-in_env = helpers.no_env
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+install_environment = lang_base.no_install
+in_env = lang_base.no_env
 
 
 def _process_filename_by_line(pattern: Pattern[bytes], filename: str) -> int:
diff --git a/pre_commit/languages/python.py b/pre_commit/languages/python.py
index c373646..976674e 100644
--- a/pre_commit/languages/python.py
+++ b/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:
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, language_version)
+def health_check(prefix: Prefix, version: str) -> str | None:
+    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)
diff --git a/pre_commit/languages/r.py b/pre_commit/languages/r.py
index e238365..138a26e 100644
--- a/pre_commit/languages/r.py
+++ b/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
-health_check = helpers.basic_health_check
+get_default_version = lang_base.basic_get_default_version
+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,
diff --git a/pre_commit/languages/ruby.py b/pre_commit/languages/ruby.py
index 4416f72..76631f2 100644
--- a/pre_commit/languages/ruby.py
+++ b/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
-run_hook = helpers.basic_run_hook
+health_check = lang_base.basic_health_check
+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',
diff --git a/pre_commit/languages/rust.py b/pre_commit/languages/rust.py
index 391fd86..e98e0d0 100644
--- a/pre_commit/languages/rust.py
+++ b/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
-run_hook = helpers.basic_run_hook
+health_check = lang_base.basic_health_check
+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
diff --git a/pre_commit/languages/script.py b/pre_commit/languages/script.py
index 08325f4..89a3ab2 100644
--- a/pre_commit/languages/script.py
+++ b/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
-health_check = helpers.basic_health_check
-install_environment = helpers.no_install
-in_env = helpers.no_env
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+install_environment = lang_base.no_install
+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,
diff --git a/pre_commit/languages/swift.py b/pre_commit/languages/swift.py
index c66ad5f..8250ab7 100644
--- a/pre_commit/languages/swift.py
+++ b/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
-health_check = helpers.basic_health_check
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+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)
-    helpers.assert_no_additional_deps('swift', additional_dependencies)
-    envdir = helpers.environment_dir(prefix, ENVIRONMENT_DIR, version)
+    lang_base.assert_version_default('swift', version)
+    lang_base.assert_no_additional_deps('swift', additional_dependencies)
+    envdir = lang_base.environment_dir(prefix, ENVIRONMENT_DIR, version)
 
     # Build the swift package
     os.mkdir(envdir)
diff --git a/pre_commit/languages/system.py b/pre_commit/languages/system.py
index 204cad7..f6ad688 100644
--- a/pre_commit/languages/system.py
+++ b/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
-health_check = helpers.basic_health_check
-install_environment = helpers.no_install
-in_env = helpers.no_env
-run_hook = helpers.basic_run_hook
+get_default_version = lang_base.basic_get_default_version
+health_check = lang_base.basic_health_check
+install_environment = lang_base.no_install
+in_env = lang_base.no_env
+run_hook = lang_base.basic_run_hook