Merging upstream version 2.10.0.

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

17 files changed, 286 insertions, 39 deletions

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d42bb1b..321e839 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.3.0
+    rev: v3.4.0
     hooks:
     -   id: trailing-whitespace
     -   id: end-of-file-fixer
@@ -21,7 +21,7 @@ repos:
     hooks:
     -   id: autopep8
 -   repo: https://github.com/pre-commit/pre-commit
-    rev: v2.9.3
+    rev: v2.10.0
     hooks:
     -   id: validate_manifest
 -   repo: https://github.com/asottile/pyupgrade
@@ -35,16 +35,16 @@ repos:
     -   id: reorder-python-imports
         args: [--py3-plus]
 -   repo: https://github.com/asottile/add-trailing-comma
-    rev: v2.0.1
+    rev: v2.1.0
     hooks:
     -   id: add-trailing-comma
         args: [--py36-plus]
 -   repo: https://github.com/asottile/setup-cfg-fmt
-    rev: v1.15.1
+    rev: v1.16.0
     hooks:
     -   id: setup-cfg-fmt
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.790
+    rev: v0.800
     hooks:
     -   id: mypy
         exclude: ^testing/resources/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ef36dec..1ba7ffa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,27 @@
+2.10.0 - 2021-01-27
+===================
+
+### Features
+- Allow `ci` as a top-level map for configuration for https://pre-commit.ci
+    - #1735 PR by @asottile.
+- Add warning for mutable `rev` in configuration
+    - #1715 PR by @paulhfischer.
+    - #974 issue by @asottile.
+- Add warning for `/*` in top-level `files` / `exclude` regexes
+    - #1750 PR by @paulhfischer.
+    - #1702 issue by @asottile.
+- Expose `PRE_COMMIT_REMOTE_BRANCH` environment variable during `pre-push`
+  hooks
+    - #1770 PR by @surafelabebe.
+- Produce error message for `language` / `language_version` for non-installable
+  languages
+    - #1771 PR by @asottile.
+
+### Fixes
+- Fix execution in worktrees in subdirectories of bare repositories
+    - #1778 PR by @asottile.
+    - #1777 issue by @s0undt3ch.
+
 2.9.3 - 2020-12-07
 ==================
 
@@ -8,7 +32,7 @@
 - Fix cleanup code on docker volumes for go
     - #1725 PR by @fsouza.
 - Fix working directory detection on SUBST drives on windows
-    - #1727 PR by mrogaski.
+    - #1727 PR by @mrogaski.
     - #1610 issue by @jcameron73.
 
 2.9.2 - 2020-11-25
diff --git a/pre_commit/clientlib.py b/pre_commit/clientlib.py
index 20d4492..8f35057 100644
--- a/pre_commit/clientlib.py
+++ b/pre_commit/clientlib.py
@@ -1,6 +1,7 @@
 import argparse
 import functools
 import logging
+import re
 import shlex
 import sys
 from typing import Any
@@ -112,7 +113,26 @@ LOCAL = 'local'
 META = 'meta'
 
 
-class OptionalSensibleRegex(cfgv.OptionalNoDefault):
+# should inherit from cfgv.Conditional if sha support is dropped
+class WarnMutableRev(cfgv.ConditionalOptional):
+    def check(self, dct: Dict[str, Any]) -> None:
+        super().check(dct)
+
+        if self.key in dct:
+            rev = dct[self.key]
+
+            if '.' not in rev and not re.match(r'^[a-fA-F0-9]+$', rev):
+                logger.warning(
+                    f'The {self.key!r} field of repo {dct["repo"]!r} '
+                    f'appears to be a mutable reference '
+                    f'(moving tag / branch).  Mutable references are never '
+                    f'updated after first install and are not supported.  '
+                    f'See https://pre-commit.com/#using-the-latest-version-for-a-repository '  # noqa: E501
+                    f'for more details.',
+                )
+
+
+class OptionalSensibleRegexAtHook(cfgv.OptionalNoDefault):
     def check(self, dct: Dict[str, Any]) -> None:
         super().check(dct)
 
@@ -124,6 +144,17 @@ class OptionalSensibleRegex(cfgv.OptionalNoDefault):
             )
 
 
+class OptionalSensibleRegexAtTop(cfgv.OptionalNoDefault):
+    def check(self, dct: Dict[str, Any]) -> None:
+        super().check(dct)
+
+        if '/*' in dct.get(self.key, ''):
+            logger.warning(
+                f'The top-level {self.key!r} field is a regex, not a glob -- '
+                f"matching '/*' probably isn't what you want here",
+            )
+
+
 class MigrateShaToRev:
     key = 'rev'
 
@@ -239,8 +270,8 @@ CONFIG_HOOK_DICT = cfgv.Map(
         for item in MANIFEST_HOOK_DICT.items
         if item.key != 'id'
     ),
-    OptionalSensibleRegex('files', cfgv.check_string),
-    OptionalSensibleRegex('exclude', cfgv.check_string),
+    OptionalSensibleRegexAtHook('files', cfgv.check_string),
+    OptionalSensibleRegexAtHook('exclude', cfgv.check_string),
 )
 CONFIG_REPO_DICT = cfgv.Map(
     'Repository', 'repo',
@@ -261,6 +292,14 @@ CONFIG_REPO_DICT = cfgv.Map(
     ),
 
     MigrateShaToRev(),
+    WarnMutableRev(
+        'rev',
+        cfgv.check_string,
+        '',
+        'repo',
+        cfgv.NotIn(LOCAL, META),
+        True,
+    ),
     cfgv.WarnAdditionalKeys(('repo', 'rev', 'hooks'), warn_unknown_keys_repo),
 )
 DEFAULT_LANGUAGE_VERSION = cfgv.Map(
@@ -297,9 +336,15 @@ CONFIG_SCHEMA = cfgv.Map(
             'exclude',
             'fail_fast',
             'minimum_pre_commit_version',
+            'ci',
         ),
         warn_unknown_keys_root,
     ),
+    OptionalSensibleRegexAtTop('files', cfgv.check_string),
+    OptionalSensibleRegexAtTop('exclude', cfgv.check_string),
+
+    # do not warn about configuration for pre-commit.ci
+    cfgv.OptionalNoDefault('ci', cfgv.check_type(dict)),
 )
 
 
diff --git a/pre_commit/commands/hook_impl.py b/pre_commit/commands/hook_impl.py
index d0e226f..25c5fdf 100644
--- a/pre_commit/commands/hook_impl.py
+++ b/pre_commit/commands/hook_impl.py
@@ -69,6 +69,7 @@ def _ns(
         color: bool,
         *,
         all_files: bool = False,
+        remote_branch: Optional[str] = None,
         from_ref: Optional[str] = None,
         to_ref: Optional[str] = None,
         remote_name: Optional[str] = None,
@@ -79,6 +80,7 @@ def _ns(
     return argparse.Namespace(
         color=color,
         hook_stage=hook_type.replace('pre-', ''),
+        remote_branch=remote_branch,
         from_ref=from_ref,
         to_ref=to_ref,
         remote_name=remote_name,
@@ -106,13 +108,14 @@ def _pre_push_ns(
     remote_url = args[1]
 
     for line in stdin.decode().splitlines():
-        _, local_sha, _, remote_sha = line.split()
+        _, local_sha, remote_branch, remote_sha = line.split()
         if local_sha == Z40:
             continue
         elif remote_sha != Z40 and _rev_exists(remote_sha):
             return _ns(
                 'pre-push', color,
                 from_ref=remote_sha, to_ref=local_sha,
+                remote_branch=remote_branch,
                 remote_name=remote_name, remote_url=remote_url,
             )
         else:
@@ -133,6 +136,7 @@ def _pre_push_ns(
                         'pre-push', color,
                         all_files=True,
                         remote_name=remote_name, remote_url=remote_url,
+                        remote_branch=remote_branch,
                     )
                 else:
                     rev_cmd = ('git', 'rev-parse', f'{first_ancestor}^')
@@ -141,6 +145,7 @@ def _pre_push_ns(
                         'pre-push', color,
                         from_ref=source, to_ref=local_sha,
                         remote_name=remote_name, remote_url=remote_url,
+                        remote_branch=remote_branch,
                     )
 
     # nothing to push
diff --git a/pre_commit/commands/run.py b/pre_commit/commands/run.py
index 1e8fad2..891488d 100644
--- a/pre_commit/commands/run.py
+++ b/pre_commit/commands/run.py
@@ -371,7 +371,8 @@ def run(
         environ['PRE_COMMIT_FROM_REF'] = args.from_ref
         environ['PRE_COMMIT_TO_REF'] = args.to_ref
 
-    if args.remote_name and args.remote_url:
+    if args.remote_name and args.remote_url and args.remote_branch:
+        environ['PRE_COMMIT_REMOTE_BRANCH'] = args.remote_branch
         environ['PRE_COMMIT_REMOTE_NAME'] = args.remote_name
         environ['PRE_COMMIT_REMOTE_URL'] = args.remote_url
 
diff --git a/pre_commit/file_lock.py b/pre_commit/file_lock.py
index 5e7a058..55a8eb2 100644
--- a/pre_commit/file_lock.py
+++ b/pre_commit/file_lock.py
@@ -1,11 +1,11 @@
 import contextlib
 import errno
-import os
+import sys
 from typing import Callable
 from typing import Generator
 
 
-if os.name == 'nt':  # pragma: no cover (windows)
+if sys.platform == 'win32':  # pragma: no cover (windows)
     import msvcrt
 
     # https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/locking
diff --git a/pre_commit/git.py b/pre_commit/git.py
index 5096274..bec816c 100644
--- a/pre_commit/git.py
+++ b/pre_commit/git.py
@@ -61,7 +61,7 @@ def get_root() -> str:
             'git failed. Is it installed, and are you in a Git repository '
             'directory?',
         )
-    if os.path.commonpath((root, git_dir)) == git_dir:
+    if os.path.samefile(root, git_dir):
         raise FatalError(
             'git toplevel unexpectedly empty! make sure you are not '
             'inside the `.git` directory of your repository.',
diff --git a/pre_commit/main.py b/pre_commit/main.py
index c1eb104..ce850c4 100644
--- a/pre_commit/main.py
+++ b/pre_commit/main.py
@@ -97,6 +97,9 @@ def _add_run_options(parser: argparse.ArgumentParser) -> None:
         help='The stage during which the hook is fired.  One of %(choices)s',
     )
     parser.add_argument(
+        '--remote-branch', help='Remote branch ref used by `git push`.',
+    )
+    parser.add_argument(
         '--from-ref', '--source', '-s',
         help=(
             '(for usage with `--from-ref`) -- this option represents the '
diff --git a/pre_commit/repository.py b/pre_commit/repository.py
index 46e96c1..15827dd 100644
--- a/pre_commit/repository.py
+++ b/pre_commit/repository.py
@@ -118,6 +118,24 @@ def _hook(
     if not ret['stages']:
         ret['stages'] = root_config['default_stages']
 
+    if languages[lang].ENVIRONMENT_DIR is None:
+        if ret['language_version'] != C.DEFAULT:
+            logger.error(
+                f'The hook `{ret["id"]}` specifies `language_version` but is '
+                f'using language `{lang}` which does not install an '
+                f'environment.  '
+                f'Perhaps you meant to use a specific language?',
+            )
+            exit(1)
+        if ret['additional_dependencies']:
+            logger.error(
+                f'The hook `{ret["id"]}` specifies `additional_dependencies` '
+                f'but is using language `{lang}` which does not install an '
+                f'environment.  '
+                f'Perhaps you meant to use a specific language?',
+            )
+            exit(1)
+
     return ret
 
 
diff --git a/setup.cfg b/setup.cfg
index 2e77fcf..913344b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = pre_commit
-version = 2.9.3
+version = 2.10.0
 description = A framework for managing and maintaining multi-language pre-commit hooks.
 long_description = file: README.md
 long_description_content_type = text/markdown
diff --git a/testing/util.py b/testing/util.py
index 18cd734..1f8cb35 100644
--- a/testing/util.py
+++ b/testing/util.py
@@ -61,6 +61,7 @@ def run_opts(
         color=False,
         verbose=False,
         hook=None,
+        remote_branch='',
         from_ref='',
         to_ref='',
         remote_name='',
@@ -78,6 +79,7 @@ def run_opts(
         color=color,
         verbose=verbose,
         hook=hook,
+        remote_branch=remote_branch,
         from_ref=from_ref,
         to_ref=to_ref,
         remote_name=remote_name,
diff --git a/tests/clientlib_test.py b/tests/clientlib_test.py
index bfb754b..6bdb0d6 100644
--- a/tests/clientlib_test.py
+++ b/tests/clientlib_test.py
@@ -166,7 +166,85 @@ def test_validate_warn_on_unknown_keys_at_top_level(tmpdir, caplog):
     ]
 
 
-def test_validate_optional_sensible_regex(caplog):
+def test_ci_map_key_allowed_at_top_level(caplog):
+    cfg = {
+        'ci': {'skip': ['foo']},
+        'repos': [{'repo': 'meta', 'hooks': [{'id': 'identity'}]}],
+    }
+    cfgv.validate(cfg, CONFIG_SCHEMA)
+    assert not caplog.record_tuples
+
+
+def test_ci_key_must_be_map():
+    with pytest.raises(cfgv.ValidationError):
+        cfgv.validate({'ci': 'invalid', 'repos': []}, CONFIG_SCHEMA)
+
+
+@pytest.mark.parametrize(
+    'rev',
+    (
+        'v0.12.4',
+        'b27f281',
+        'b27f281eb9398fc8504415d7fbdabf119ea8c5e1',
+        '19.10b0',
+        '4.3.21-2',
+    ),
+)
+def test_warn_mutable_rev_ok(caplog, rev):
+    config_obj = {
+        'repo': 'https://gitlab.com/pycqa/flake8',
+        'rev': rev,
+        'hooks': [{'id': 'flake8'}],
+    }
+    cfgv.validate(config_obj, CONFIG_REPO_DICT)
+
+    assert caplog.record_tuples == []
+
+
+@pytest.mark.parametrize(
+    'rev',
+    (
+        '',
+        'HEAD',
+        'stable',
+        'master',
+        'some_branch_name',
+    ),
+)
+def test_warn_mutable_rev_invalid(caplog, rev):
+    config_obj = {
+        'repo': 'https://gitlab.com/pycqa/flake8',
+        'rev': rev,
+        'hooks': [{'id': 'flake8'}],
+    }
+    cfgv.validate(config_obj, CONFIG_REPO_DICT)
+
+    assert caplog.record_tuples == [
+        (
+            'pre_commit',
+            logging.WARNING,
+            "The 'rev' field of repo 'https://gitlab.com/pycqa/flake8' "
+            'appears to be a mutable reference (moving tag / branch).  '
+            'Mutable references are never updated after first install and are '
+            'not supported.  '
+            'See https://pre-commit.com/#using-the-latest-version-for-a-repository '  # noqa: E501
+            'for more details.',
+        ),
+    ]
+
+
+def test_warn_mutable_rev_conditional():
+    config_obj = {
+        'repo': 'meta',
+        'rev': '3.7.7',
+        'hooks': [{'id': 'flake8'}],
+    }
+
+    with pytest.raises(cfgv.ValidationError):
+        cfgv.validate(config_obj, CONFIG_REPO_DICT)
+
+
+def test_validate_optional_sensible_regex_at_hook_level(caplog):
     config_obj = {
         'id': 'flake8',
         'files': 'dir/*.py',
@@ -183,6 +261,23 @@ def test_validate_optional_sensible_regex(caplog):
     ]
 
 
+def test_validate_optional_sensible_regex_at_top_level(caplog):
+    config_obj = {
+        'files': 'dir/*.py',
+        'repos': [],
+    }
+    cfgv.validate(config_obj, CONFIG_SCHEMA)
+
+    assert caplog.record_tuples == [
+        (
+            'pre_commit',
+            logging.WARNING,
+            "The top-level 'files' field is a regex, not a glob -- matching "
+            "'/*' probably isn't what you want here",
+        ),
+    ]
+
+
 @pytest.mark.parametrize('fn', (validate_config_main, validate_manifest_main))
 def test_mains_not_ok(tmpdir, fn):
     not_yaml = tmpdir.join('f.notyaml')
diff --git a/tests/commands/run_test.py b/tests/commands/run_test.py
index 914d567..eaea813 100644
--- a/tests/commands/run_test.py
+++ b/tests/commands/run_test.py
@@ -486,6 +486,7 @@ def test_from_ref_to_ref_error_msg_error(
 def test_all_push_options_ok(cap_out, store, repo_with_passing_hook):
     args = run_opts(
         from_ref='master', to_ref='master',
+        remote_branch='master',
         remote_name='origin', remote_url='https://example.com/repo',
     )
     ret, printed = _do_run(cap_out, store, repo_with_passing_hook, args)
diff --git a/tests/conftest.py b/tests/conftest.py
index 335d261..b36ce5a 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -261,15 +261,6 @@ def cap_out():
         yield Fixture(stream)
 
 
-@pytest.fixture
-def fake_log_handler():
-    handler = mock.Mock(level=logging.INFO)
-    logger = logging.getLogger('pre_commit')
-    logger.addHandler(handler)
-    yield handler
-    logger.removeHandler(handler)
-
-
 @pytest.fixture(scope='session', autouse=True)
 def set_git_templatedir(tmpdir_factory):
     tdir = str(tmpdir_factory.mktemp('git_template_dir'))
diff --git a/tests/git_test.py b/tests/git_test.py
index fafd4a6..69fd206 100644
--- a/tests/git_test.py
+++ b/tests/git_test.py
@@ -3,6 +3,7 @@ import os.path
 import pytest
 
 from pre_commit import git
+from pre_commit.error_handler import FatalError
 from pre_commit.util import cmd_output
 from testing.util import git_commit
 
@@ -18,6 +19,25 @@ def test_get_root_deeper(in_git_dir):
         assert os.path.normcase(git.get_root()) == expected
 
 
+def test_in_exactly_dot_git(in_git_dir):
+    with in_git_dir.join('.git').as_cwd(), pytest.raises(FatalError):
+        git.get_root()
+
+
+def test_get_root_bare_worktree(tmpdir):
+    src = tmpdir.join('src').ensure_dir()
+    cmd_output('git', 'init', str(src))
+    git_commit(cwd=str(src))
+
+    bare = tmpdir.join('bare.git').ensure_dir()
+    cmd_output('git', 'clone', '--bare', str(src), str(bare))
+
+    cmd_output('git', 'worktree', 'add', 'foo', 'HEAD', cwd=bare)
+
+    with bare.join('foo').as_cwd():
+        assert git.get_root() == os.path.abspath('.')
+
+
 def test_get_staged_files_deleted(in_git_dir):
     in_git_dir.join('test').ensure()
     cmd_output('git', 'add', 'test')
diff --git a/tests/main_test.py b/tests/main_test.py
index 6738df6..2460bd8 100644
--- a/tests/main_test.py
+++ b/tests/main_test.py
@@ -35,11 +35,6 @@ def test_adjust_args_and_chdir_not_in_git_dir(in_tmpdir):
         main._adjust_args_and_chdir(_args())
 
 
-def test_adjust_args_and_chdir_in_dot_git_dir(in_git_dir):
-    with in_git_dir.join('.git').as_cwd(), pytest.raises(FatalError):
-        main._adjust_args_and_chdir(_args())
-
-
 def test_adjust_args_and_chdir_noop(in_git_dir):
     args = _args(command='run', files=['f1', 'f2'])
     main._adjust_args_and_chdir(args)
diff --git a/tests/repository_test.py b/tests/repository_test.py
index d513cb7..8540db3 100644
--- a/tests/repository_test.py
+++ b/tests/repository_test.py
@@ -569,7 +569,7 @@ def test_additional_golang_dependencies_installed(
     path = make_repo(tempdir_factory, 'golang_hooks_repo')
     config = make_config_from_repo(path)
     # A small go package
-    deps = ['github.com/golang/example/hello']
+    deps = ['golang.org/x/example/hello']
     config['hooks'][0]['additional_dependencies'] = deps
     hook = _get_hook(config, store, 'golang-hook')
     binaries = os.listdir(
@@ -590,7 +590,7 @@ def test_local_golang_additional_dependencies(store):
             'name': 'hello',
             'entry': 'hello',
             'language': 'golang',
-            'additional_dependencies': ['github.com/golang/example/hello'],
+            'additional_dependencies': ['golang.org/x/example/hello'],
         }],
     }
     hook = _get_hook(config, store, 'hello')
@@ -640,7 +640,7 @@ def test_fail_hooks(store):
     )
 
 
-def test_unknown_keys(store, fake_log_handler):
+def test_unknown_keys(store, caplog):
     config = {
         'repo': 'local',
         'hooks': [{
@@ -653,8 +653,8 @@ def test_unknown_keys(store, fake_log_handler):
         }],
     }
     _get_hook(config, store, 'too-much')
-    expected = 'Unexpected key(s) present on local => too-much: foo, hello'
-    assert fake_log_handler.handle.call_args[0][0].msg == expected
+    msg, = caplog.messages
+    assert msg == 'Unexpected key(s) present on local => too-much: foo, hello'
 
 
 def test_reinstall(tempdir_factory, store, log_info_mock):
@@ -832,27 +832,28 @@ def test_default_stages(store, local_python_config):
     assert hook.stages == ['push']
 
 
-def test_hook_id_not_present(tempdir_factory, store, fake_log_handler):
+def test_hook_id_not_present(tempdir_factory, store, caplog):
     path = make_repo(tempdir_factory, 'script_hooks_repo')
     config = make_config_from_repo(path)
     config['hooks'][0]['id'] = 'i-dont-exist'
     with pytest.raises(SystemExit):
         _get_hook(config, store, 'i-dont-exist')
-    assert fake_log_handler.handle.call_args[0][0].msg == (
+    _, msg = caplog.messages
+    assert msg == (
         f'`i-dont-exist` is not present in repository file://{path}.  '
         f'Typo? Perhaps it is introduced in a newer version?  '
         f'Often `pre-commit autoupdate` fixes this.'
     )
 
 
-def test_too_new_version(tempdir_factory, store, fake_log_handler):
+def test_too_new_version(tempdir_factory, store, caplog):
     path = make_repo(tempdir_factory, 'script_hooks_repo')
     with modify_manifest(path) as manifest:
         manifest[0]['minimum_pre_commit_version'] = '999.0.0'
     config = make_config_from_repo(path)
     with pytest.raises(SystemExit):
         _get_hook(config, store, 'bash_hook')
-    msg = fake_log_handler.handle.call_args[0][0].msg
+    _, msg = caplog.messages
     pattern = re_assert.Matches(
         r'^The hook `bash_hook` requires pre-commit version 999\.0\.0 but '
         r'version \d+\.\d+\.\d+ is installed.  '
@@ -942,3 +943,49 @@ def test_dotnet_hook(tempdir_factory, store, 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',
+        'hooks': [{
+            'id': 'system-hook',
+            'name': 'system-hook',
+            'language': 'system',
+            'entry': 'python3 -c "import sys; print(sys.version)"',
+            'language_version': 'python3.10',
+        }],
+    }
+    with pytest.raises(SystemExit) as excinfo:
+        _get_hook(config, store, 'system-hook')
+    assert excinfo.value.code == 1
+
+    msg, = caplog.messages
+    assert msg == (
+        'The hook `system-hook` specifies `language_version` but is using '
+        'language `system` which does not install an environment.  '
+        'Perhaps you meant to use a specific language?'
+    )
+
+
+def test_non_installable_hook_error_for_additional_dependencies(store, caplog):
+    config = {
+        'repo': 'local',
+        'hooks': [{
+            'id': 'system-hook',
+            'name': 'system-hook',
+            'language': 'system',
+            'entry': 'python3 -c "import sys; print(sys.version)"',
+            'additional_dependencies': ['astpretty'],
+        }],
+    }
+    with pytest.raises(SystemExit) as excinfo:
+        _get_hook(config, store, 'system-hook')
+    assert excinfo.value.code == 1
+
+    msg, = caplog.messages
+    assert msg == (
+        'The hook `system-hook` specifies `additional_dependencies` but is '
+        'using language `system` which does not install an environment.  '
+        'Perhaps you meant to use a specific language?'
+    )