use_filesnames_file

pre_commit/clientlib.py

@@ -128,6 +128,7 @@ MANIFEST_HOOK_DICT = cfgv.Map(
     cfgv.Optional('always_run', cfgv.check_bool, False),
     cfgv.Optional('fail_fast', cfgv.check_bool, False),
     cfgv.Optional('pass_filenames', cfgv.check_bool, True),
+    cfgv.Optional('use_filesnames_file', cfgv.check_bool, False),
     cfgv.Optional('description', cfgv.check_string, ''),
     cfgv.Optional('language_version', cfgv.check_string, C.DEFAULT),
     cfgv.Optional('log_file', cfgv.check_string, ''),

pre_commit/commands/run.py

@@ -7,6 +7,7 @@ import logging
 import os
 import re
 import subprocess
+import tempfile
 import time
 import unicodedata
 from collections.abc import Generator
@@ -187,6 +188,11 @@ def _run_single_hook(
 
         if not hook.pass_filenames:
             filenames = ()
+        elif hook.use_filesnames_file:
+            filenames_file = tempfile.NamedTemporaryFile("w+")
+            filenames_file.write("\n".join(filenames))
+            filenames = (f"@{filenames_file}",)
+
         time_before = time.monotonic()
         language = languages[hook.language]
         with language.in_env(hook.prefix, hook.language_version):

pre_commit/hook.py

@@ -28,6 +28,7 @@ class Hook(NamedTuple):
     always_run: bool
     fail_fast: bool
     pass_filenames: bool
+    use_filesnames_file: bool
     description: str
     language_version: str
     log_file: str

tests/commands/run_test.py

@@ -1064,6 +1064,31 @@ def test_pass_filenames(
     assert (b'foo.py' in printed) == pass_filenames
 
 
+@pytest.mark.parametrize(
+    ('use_filesnames_file', 'hook_args'),
+    (
+        (True, []),
+        (False, []),
+        (True, ['some', 'args']),
+        (False, ['some', 'args']),
+    ),
+)
+def test_use_filesnames_file(
+        cap_out, store, repo_with_passing_hook,
+        use_filesnames_file, hook_args,
+):
+    with modify_config() as config:
+        config['repos'][0]['hooks'][0]['use_filesnames_file'] = use_filesnames_file
+        config['repos'][0]['hooks'][0]['args'] = hook_args
+    stage_a_file()
+    ret, printed = _do_run(
+        cap_out, store, repo_with_passing_hook, run_opts(verbose=True),
+    )
+    out_lines = printed.splitlines()
+    out_lines[-1] == b"Hello World"
+    assert out_lines[-2].startswith(b"@") == use_filesnames_file
+
+
 def test_fail_fast(cap_out, store, repo_with_failing_hook):
     with modify_config() as config:
         # More than one hook

tests/repository_test.py

@@ -455,6 +455,7 @@ def test_manifest_hooks(tempdir_factory, store):
         minimum_pre_commit_version='0',
         name='Bash hook',
         pass_filenames=True,
+        use_filesnames_file=False,
         require_serial=False,
         stages=[
             'commit-msg',