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Support SHA-256 zero OIDs in pre-push hook by dajinzhu · Pull Request #3748 · pre-commit/pre-commit · GitHub

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Support SHA-256 zero OIDs in pre-push hook #3748

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dajinzhu wants to merge 1 commit into from
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Support SHA-256 zero OIDs in pre-push hook #3748

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8 changes: 5 additions & 3 deletions pre_commit/commands/hook_impl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,9 @@
from pre_commit.parse_shebang import normalize_cmd
from pre_commit.store import Store

Z40 = '0' * 40

def _is_zero_oid(oid: str) -> bool:
return bool(oid) and all(character == '0' for character in oid)


def _run_legacy(
Expand Down Expand Up @@ -128,9 +130,9 @@ def _pre_push_ns(
for line in stdin.decode().splitlines():
parts = line.rsplit(maxsplit=3)
local_branch, local_sha, remote_branch, remote_sha = parts
if local_sha == Z40:
if _is_zero_oid(local_sha):
continue
elif remote_sha != Z40 and _rev_exists(remote_sha):
elif not _is_zero_oid(remote_sha) and _rev_exists(remote_sha):
return _ns(
'pre-push', color,
from_ref=remote_sha, to_ref=local_sha,
Expand Down
22 changes: 14 additions & 8 deletions tests/commands/hook_impl_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@
from testing.util import cwd
from testing.util import git_commit

ZERO_OID = '0' * 40


def test_validate_config_file_exists(tmpdir):
cfg = tmpdir.join(C.CONFIG_FILE).ensure()
Expand Down Expand Up @@ -284,12 +286,14 @@ def test_run_ns_pre_push_updating_branch(push_example):
assert ns.all_files is False


def test_run_ns_pre_push_new_branch(push_example):
@pytest.mark.parametrize('zero_oid_length', (40, 64))
def test_run_ns_pre_push_new_branch(push_example, zero_oid_length):
src, src_head, clone, clone_head = push_example

with cwd(clone):
args = ('origin', src)
stdin = f'HEAD {clone_head} refs/heads/b {hook_impl.Z40}\n'.encode()
zero_oid = '0' * zero_oid_length
stdin = f'HEAD {clone_head} refs/heads/b {zero_oid}\n'.encode()
ns = hook_impl._run_ns('pre-push', False, args, stdin)

assert ns is not None
Expand All @@ -302,7 +306,7 @@ def test_run_ns_pre_push_new_branch_existing_rev(push_example):

with cwd(clone):
args = ('origin', src)
stdin = f'HEAD {src_head} refs/heads/b2 {hook_impl.Z40}\n'.encode()
stdin = f'HEAD {src_head} refs/heads/b2 {ZERO_OID}\n'.encode()
ns = hook_impl._run_ns('pre-push', False, args, stdin)

assert ns is None
Expand All @@ -313,7 +317,7 @@ def test_run_ns_pre_push_ref_with_whitespace(push_example):

with cwd(clone):
args = ('origin', src)
line = f'HEAD^{{/ }} {src_head} refs/heads/b2 {hook_impl.Z40}\n'
line = f'HEAD^{{/ }} {src_head} refs/heads/b2 {ZERO_OID}\n'
stdin = line.encode()
ns = hook_impl._run_ns('pre-push', False, args, stdin)

Expand All @@ -329,19 +333,21 @@ def test_pushing_orphan_branch(push_example):

with cwd(clone):
args = ('origin', src)
stdin = f'HEAD {clone_rev} refs/heads/b2 {hook_impl.Z40}\n'.encode()
stdin = f'HEAD {clone_rev} refs/heads/b2 {ZERO_OID}\n'.encode()
ns = hook_impl._run_ns('pre-push', False, args, stdin)

assert ns is not None
assert ns.all_files is True


def test_run_ns_pre_push_deleting_branch(push_example):
@pytest.mark.parametrize('zero_oid_length', (40, 64))
def test_run_ns_pre_push_deleting_branch(push_example, zero_oid_length):
src, src_head, clone, _ = push_example

with cwd(clone):
args = ('origin', src)
stdin = f'(delete) {hook_impl.Z40} refs/heads/b {src_head}'.encode()
zero_oid = '0' * zero_oid_length
stdin = f'(delete) {zero_oid} refs/heads/b {src_head}'.encode()
ns = hook_impl._run_ns('pre-push', False, args, stdin)

assert ns is None
Expand All @@ -350,7 +356,7 @@ def test_run_ns_pre_push_deleting_branch(push_example):
def test_hook_impl_main_noop_pre_push(cap_out, store, push_example):
src, src_head, clone, _ = push_example

stdin = f'(delete) {hook_impl.Z40} refs/heads/b {src_head}'.encode()
stdin = f'(delete) {ZERO_OID} refs/heads/b {src_head}'.encode()
with mock.patch.object(sys.stdin.buffer, 'read', return_value=stdin):
with cwd(clone):
write_config('.', sample_local_config())
Expand Down
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