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authorMasahiro Yamada <masahiroy@kernel.org>2021-05-23 12:14:26 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2021-05-27 04:01:51 +0900
commitffaf62a8050b5f7995083ee93526b57d8d79fec4 (patch)
tree0808e5154d57f9474ba9401283f308eb160b8b38 /scripts/setlocalversion
parenta2be76a352f1035a2e5f914a409743d65dc514c5 (diff)
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scripts/setlocalversion: add more comments to -dirty flag detection
This script stumbled on the read-only source tree over again: - a2bb90a08cb3 ("kbuild: fix delay in setlocalversion on readonly source") - cdf2bc632ebc ("scripts/setlocalversion on write-protected source tree") - 8ef14c2c41d9 ("Revert "scripts/setlocalversion: git: Make -dirty check more robust"") - ff64dd485730 ("scripts/setlocalversion: Improve -dirty check with git-status --no-optional-locks") Add comments to clarify that this script should never ever try to write to the source tree. 'git describe --dirty' might look as a simple solution for appending the -dirty string, but we cannot use it because it creates the .git/index.lock file. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-by: Nico Schottelius <nico-linuxsetlocalversion@schottelius.org>
Diffstat (limited to 'scripts/setlocalversion')
-rwxr-xr-xscripts/setlocalversion4
1 files changed, 4 insertions, 0 deletions
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index f3084d6bbb22..6865df6699c8 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -80,6 +80,10 @@ scm_version()
fi
# Check for uncommitted changes.
+ # This script must avoid any write attempt to the source tree,
+ # which might be read-only.
+ # You cannot use 'git describe --dirty' because it tries to
+ # create .git/index.lock .
# First, with git-status, but --no-optional-locks is only
# supported in git >= 2.14, so fall back to git-diff-index if
# it fails. Note that git-diff-index does not refresh the