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kbuild: make W=1 warn files that are tracked but ignored by git

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The top .gitignore comments about how to detect files breaking
.gitignore rules, but people rarely care about it.

Add a new W=1 warning to detect files that are tracked but ignored by
git. If git is not installed or the source tree is not tracked by git
at all, this script does not print anything.

Running it on v6.2-rc1 detected the following:

  $ make W=1 misc-check
  Documentation/devicetree/bindings/.yamllint: warning: ignored by one of the .gitignore files
  drivers/clk/.kunitconfig: warning: ignored by one of the .gitignore files
  drivers/gpu/drm/tests/.kunitconfig: warning: ignored by one of the .gitignore files
  drivers/hid/.kunitconfig: warning: ignored by one of the .gitignore files
  fs/ext4/.kunitconfig: warning: ignored by one of the .gitignore files
  fs/fat/.kunitconfig: warning: ignored by one of the .gitignore files
  kernel/kcsan/.kunitconfig: warning: ignored by one of the .gitignore files
  lib/kunit/.kunitconfig: warning: ignored by one of the .gitignore files
  mm/kfence/.kunitconfig: warning: ignored by one of the .gitignore files
  tools/testing/selftests/arm64/tags/.gitignore: warning: ignored by one of the .gitignore files
  tools/testing/selftests/arm64/tags/Makefile: warning: ignored by one of the .gitignore files
  tools/testing/selftests/arm64/tags/run_tags_test.sh: warning: ignored by one of the .gitignore files
  tools/testing/selftests/arm64/tags/tags_test.c: warning: ignored by one of the .gitignore files

These are ignored by the '.*' or 'tags' in the top .gitignore, but
there is no rule to negate it.

You might be tempted to do 'git add -f' but I want to have the real
issue fixed (by fixing a .gitignore, or by renaming files, etc.).

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
This commit is contained in:
Masahiro Yamada 2022-12-29 16:43:10 +09:00
parent b8a9ddcafc
commit 91ecf7ff1b
2 changed files with 25 additions and 0 deletions
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6
Makefile
View File

@ -1861,6 +1861,12 @@ rust-analyzer:
# Misc
# ---------------------------------------------------------------------------
PHONY += misc-check
misc-check:
$(Q)$(srctree)/scripts/misc-check
all: misc-check
PHONY += scripts_gdb
scripts_gdb: prepare0
$(Q)$(MAKE) $(build)=scripts/gdb

19
scripts/misc-check Executable file
View File

@ -0,0 +1,19 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
set -e
# Detect files that are tracked but ignored by git. This is checked only when
# ${KBUILD_EXTRA_WARN} contains 1, git is installed, and the source tree is
# tracked by git.
check_tracked_ignored_files () {
case "${KBUILD_EXTRA_WARN}" in
*1*) ;;
*) return;;
esac
git -C ${srctree:-.} ls-files -i -c --exclude-per-directory=.gitignore 2>/dev/null |
sed 's/$/: warning: ignored by one of the .gitignore files/' >&2
}
check_tracked_ignored_files