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git hooks: commit msg: allow to opt in for auto-sign-off

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Just the subset when author and the committer is the same.

Signed-off-by: Miklos Vajna <vmiklos@collabora.com>
Change-Id: Icff594a6a82bd0395e31f8e46cb56cb0e046e638
This commit is contained in:
Miklos Vajna 2020-11-04 12:18:24 +01:00
parent bb30f7c346
commit 32517390e8
2 changed files with 28 additions and 6 deletions
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11
.git-hooks/README Normal file
View file

@ -0,0 +1,11 @@
commit-msg
----------
This hooks supports the `commit.signOff` option.
This is a boolean value which lets you enable the -s/--signoff option of
commit by default. Note: Adding the Signed-off-by: line to a commit should be
a conscious act and means that you certify you have the rights to submit this
work under the same open source license. Please see the README.CONTRIBUTING.md
document for further discussion. The option is ignored if the author and the
committer is not the same.

23
.git-hooks/commit-msg
View file

@ -28,9 +28,26 @@ if test ! -f "$1" ; then
exit 1
fi
# $RANDOM will be undefined if not using bash, so don't use set -u
random=$( (whoami ; hostname ; date; cat $1 ; echo $RANDOM) | git hash-object --stdin)
dest="$1.tmp.${random}"
trap 'rm -f "${dest}"' EXIT
GIT_AUTHOR="$(git var GIT_AUTHOR_IDENT | sed 's/^\(.*>\).*$/\1/')"
GIT_COMMITTER="$(git var GIT_COMMITTER_IDENT | sed 's/^\(.*>\).*$/\1/')"
git config --bool --get commit.signOff >/dev/null
if [ $? = 0 -a "${GIT_AUTHOR}" = "${GIT_COMMITTER}" ]; then
SOB="Signed-off-by: ${GIT_AUTHOR}"
git -c trailer.ifexists=doNothing interpret-trailers \
--trailer "${SOB}" < "$1" > "${dest}"
mv "${dest}" "$1"
fi
if ! grep -q "^Signed-off-by:" "$1"; then
echo "Commit message is not signed off: $1"
echo "Use 'git commit -s' to sign off the commit message."
echo "Use 'git config commit.signOff true' to automatically sign off commits."
exit 1
fi
@ -39,12 +56,6 @@ if test "false" = "`git config --bool --get gerrit.createChangeId`" ; then
exit 0
fi
# $RANDOM will be undefined if not using bash, so don't use set -u
random=$( (whoami ; hostname ; date; cat $1 ; echo $RANDOM) | git hash-object --stdin)
dest="$1.tmp.${random}"
trap 'rm -f "${dest}"' EXIT
if ! git stripspace --strip-comments < "$1" > "${dest}" ; then
echo "cannot strip comments from $1"
exit 1