lix/maintainers/check-headers.sh
jade 6ac0f16b3d pre-commit check for pragma once and ///@file
This is in our style guide, we can cheaply enforce it, let's do it.

```
$ pre-commit
check-case-conflicts.....................................................Passed
check-executables-have-shebangs..........................................Passed
check-headers............................................................Failed
- hook id: check-headers
- exit code: 1

Missing pattern @file in file src/libexpr/value.hh

We found some header files that don't conform to the style guide.

The Lix style guide requests that header files:
- Begin with `#pragma once` so they only get parsed once
- Contain a doxygen comment (`/**` or `///`) containing `@file`, for
  example, `///@file`, which will make doxygen generate docs for them.

  When adding that, consider also adding a `@brief` with a sentence
  explaining what the header is for.

For more details: https://wiki.lix.systems/link/3#bkmrk-header-files

check-merge-conflicts....................................................Passed
check-shebang-scripts-are-executable.....................................Passed
check-symlinks.......................................(no files to check)Skipped
end-of-file-fixer........................................................Passed
mixed-line-endings.......................................................Passed
no-commit-to-branch......................................................Passed
release-notes........................................(no files to check)Skipped
treefmt..................................................................Passed
trim-trailing-whitespace.................................................Passed
```

Fixes: lix-project/lix#233
Change-Id: I77150b9298c844ffedd0f85cc5250ae9208502e3
2024-04-08 16:10:57 -07:00

48 lines
1.2 KiB
Bash
Executable file

#!/usr/bin/env bash
set -eu
# n.b. this might be printed multiple times if any violating header files are
# in different parallelism groups inside pre-commit. We cannot do anything about
# this.
explanation=$(cat <<'EOF'
We found some header files that don't conform to the style guide.
The Lix style guide requests that header files:
- Begin with `#pragma once` so they only get parsed once
- Contain a doxygen comment (`/**` or `///`) containing `@file`, for
example, `///@file`, which will make doxygen generate docs for them.
When adding that, consider also adding a `@brief` with a sentence
explaining what the header is for.
For more details: https://wiki.lix.systems/link/3#bkmrk-header-files
EOF
)
check_file() {
grep -q "$1" "$2" || (echo "Missing pattern $1 in file $2" >&2; return 1)
}
patterns=(
# makes a file get included only once even if it is included multiple times
'^#pragma once$'
# as used in ///@file, makes the file appear to doxygen
'@file'
)
fail=0
for pattern in "${patterns[@]}"; do
for file in "$@"; do
check_file "$pattern" "$file" || fail=1
done
done
if [[ $fail != 0 ]]; then
echo "$explanation" >&2
exit 1
else
echo OK
fi