Summary
Using prek==0.3.12 leads to false errors during commit-msg stage. For example, with
#.pre-commit-config.yaml
repos:
- repo: https://github.com/pre-commit/pre-commit-hooks
rev: v6.0.0
hooks:
- id: check-jsonrunning:
prek install
git add .
git commit -m 'dummy'
gives the following output:
Using config file: .pre-commit-config.yaml
check json...........................................(no files to check)Skipped
check json...............................................................Failed
- hook id: check-json
- exit code: 1
.git/COMMIT_EDITMSG: Failed to json decode (expected value at line 1 column 1)
No such error exists for prek<=0.3.12
Pretty sure this is related to #2043.
Willing to submit a PR?
Platform
macOS
Version
prek 0.3.12
.pre-commit-config.yaml
repos:
- repo: https://github.com/pre-commit/pre-commit-hooks
rev: v6.0.0
hooks:
- id: check-jsonLog file
2026-05-05T15:45:56.804557Z DEBUG prek: 0.3.12 (56d6d0c13 2026-05-05)
2026-05-05T15:45:56.804676Z DEBUG Args: ["/Users/wpk/.local/bin/prek", "hook-impl", "--hook-dir", "/Users/wpk/tmp/dummy/.git/hooks", "--script-version", "4", "--hook-type=commit-msg", "--", ".git/COMMIT_EDITMSG"]
2026-05-05T15:45:56.822204Z TRACE get_root: close time.busy=17.1ms time.idle=11.4µs
2026-05-05T15:45:56.822648Z DEBUG Git root: /Users/wpk/tmp/dummy
2026-05-05T15:45:56.822714Z DEBUG Found workspace root at `/Users/wpk/tmp/dummy`
2026-05-05T15:45:56.822734Z DEBUG Found project root at ``
2026-05-05T15:45:56.822772Z DEBUG Loading project configuration path=.pre-commit-config.yaml
2026-05-05T15:45:56.823393Z TRACE Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git ls-files --unmerged`
2026-05-05T15:45:56.837577Z DEBUG Found workspace root at `/Users/wpk/tmp/dummy`
2026-05-05T15:45:56.837635Z TRACE Include selectors: ``
2026-05-05T15:45:56.837651Z TRACE Skip selectors: ``
2026-05-05T15:45:56.838142Z DEBUG discover{root="/Users/wpk/tmp/dummy" config=None refresh=false}: Loaded workspace from cache
2026-05-05T15:45:56.838211Z DEBUG discover{root="/Users/wpk/tmp/dummy" config=None refresh=false}: Loading project configuration path=.pre-commit-config.yaml
2026-05-05T15:45:56.838564Z TRACE discover{root="/Users/wpk/tmp/dummy" config=None refresh=false}: close time.busy=872µs time.idle=3.35µs
2026-05-05T15:45:56.838656Z TRACE Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git diff --exit-code --name-only -z /Users/wpk/tmp/dummy/.pre-commit-config.yaml`
2026-05-05T15:45:56.865328Z TRACE Checking lock resource="store" path=/Users/wpk/.cache/prek/.lock
2026-05-05T15:45:56.865361Z DEBUG Acquired lock resource="store"
2026-05-05T15:45:56.869452Z TRACE No requires-python found in pyproject.toml hook=check-json
2026-05-05T15:45:56.869708Z DEBUG Hooks going to run: ["check-json"]
2026-05-05T15:45:56.873307Z TRACE Executing `/Users/wpk/Library/Application Support/uv/python/cpython-3.14.3-macos-x86_64-none/bin/python3.14 -I -c import sys, json
info = {
"version": ".".join(map(str, sys.version_info[:3])),
"base_exec_prefix": sys.base_exec_prefix,
}
print(json.dumps(info))
[...]`
2026-05-05T15:45:56.930401Z WARN Skipping unhealthy installed hook err=Python version mismatch: expected 3.14.2, found 3.14.3 path=/Users/wpk/.cache/prek/hooks/python-xkaAGEivAuqSpfBA8tYJ
2026-05-05T15:45:56.930791Z DEBUG Found installed environment for hook `check-json` at `/Users/wpk/.cache/prek/hooks/python-ZIU1aU7lxMHAzPhSzSoF`
2026-05-05T15:45:56.930887Z TRACE Released lock path=/Users/wpk/.cache/prek/.lock
2026-05-05T15:45:56.930921Z TRACE Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git diff --diff-filter=A --name-only -z -- /Users/wpk/tmp/dummy`
2026-05-05T15:45:56.943255Z TRACE Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git write-tree`
2026-05-05T15:45:56.977961Z TRACE Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git diff-index --binary --exit-code 34d7949229f90fb6736e0d1fa33568353e123b91 -- /Users/wpk/tmp/dummy`
2026-05-05T15:45:57.008759Z DEBUG Working tree is clean
2026-05-05T15:45:57.009016Z TRACE Files for project `.` after filtered: 1
2026-05-05T15:45:57.009057Z TRACE get_diff{path="/Users/wpk/tmp/dummy"}: Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git diff -- /Users/wpk/tmp/dummy`
2026-05-05T15:45:57.054733Z TRACE get_diff{path="/Users/wpk/tmp/dummy"}: close time.busy=681µs time.idle=45.0ms
2026-05-05T15:45:57.054915Z DEBUG Running priority group with priority 0 with concurrency 16: ["check-json"]
2026-05-05T15:45:57.055037Z TRACE Files for hook `check-json` after filtered: 1
2026-05-05T15:45:57.055406Z DEBUG run{hook_id=check-json language=python}: Running hook `check-json` in fast path
2026-05-05T15:45:57.055862Z TRACE run{hook_id=check-json language=python}: close time.busy=561µs time.idle=169µs
2026-05-05T15:45:57.055936Z TRACE get_diff{path="/Users/wpk/tmp/dummy"}: Executing `/Applications/Xcode.app/Contents/Developer/usr/libexec/git-core/git diff -- /Users/wpk/tmp/dummy`
2026-05-05T15:45:57.075358Z TRACE get_diff{path="/Users/wpk/tmp/dummy"}: close time.busy=1.99ms time.idle=17.4ms
Summary
Using prek==0.3.12 leads to false errors during commit-msg stage. For example, with
running:
gives the following output:
Using config file: .pre-commit-config.yaml check json...........................................(no files to check)Skipped check json...............................................................Failed - hook id: check-json - exit code: 1 .git/COMMIT_EDITMSG: Failed to json decode (expected value at line 1 column 1)No such error exists for
prek<=0.3.12Pretty sure this is related to #2043.
Willing to submit a PR?
Platform
macOS
Version
prek 0.3.12
.pre-commit-config.yaml
Log file