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#
# This is a bash shell fragment, intended to be sourced by scripts that
# want to work with git in the emc2 repo.
#
# Sets GIT_BRANCH to the passed in branch name; if none is passed in it
# attempts to detect the current branch (this will fail if the repo is in a
# detached HEAD state).
#
# Sets DEB_COMPONENT based on the branch. Official release branches get
# their own component, all other branches go in "scratch".
#
# Sets GIT_TAG to the most recent signed tag (this will fall back to the
# most recent tag of any kind if no signed tag is found).
#
function githelper() {
if [ -z "$1" ]; then
GIT_BRANCH=$(git symbolic-ref -q --short HEAD 2>/dev/null)
if [ -z "$GIT_BRANCH" ]; then
GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
fi
else
GIT_BRANCH="$1"
fi
case $GIT_BRANCH in
master)
MM=$(git show HEAD:VERSION | sed -E 's/^([0-9]+)\.([0-9]+).*/\1.\2/')
GIT_TAG_GLOB="v${MM}.*"
DEB_COMPONENT="master"
;;
# release branches have names matching "number.number", which is awkward to express as a glob
[0-9].[0-9] | [0-9].[0-9][0-9] | [0-9].[0-9][0-9][0-9] | [0-9][0-9].[0-9] | [0-9][0-9].[0-9][0-9] | [0-9][0-9].[0-9][0-9][0-9])
GIT_TAG_GLOB="v${GIT_BRANCH}.*"
DEB_COMPONENT=$GIT_BRANCH
;;
v2.5_branch)
GIT_TAG_GLOB="v2.5*"
DEB_COMPONENT="v2.5_branch"
;;
v2.4_branch)
GIT_TAG_GLOB="v2.4*"
DEB_COMPONENT="v2.4_branch"
;;
*)
GIT_TAG_GLOB="*"
DEB_COMPONENT="scratch"
;;
esac
# use the gnupg keyring from our git repo to verify signatures on the release tags
export GNUPGHOME=$(git rev-parse --show-toplevel)/gnupg
NEWEST_SIGNED_TAG_UTIME=-1
NEWEST_UNSIGNED_TAG_UTIME=-1
for TAG in $(git tag -l "$GIT_TAG_GLOB"); do
if ! git cat-file tag $TAG > /dev/null 2> /dev/null; then
continue
fi
TAG_UTIME=$(git cat-file tag $TAG | grep tagger | awk '{print $(NF-1)-$NF*36}')
if git tag -v "$TAG" > /dev/null 2> /dev/null; then
# it's a valid signed tag
if [ $TAG_UTIME -gt $NEWEST_SIGNED_TAG_UTIME ]; then
NEWEST_SIGNED_TAG=$TAG
NEWEST_SIGNED_TAG_UTIME=$TAG_UTIME
fi
else
# unsigned tag
if [ $TAG_UTIME -gt $NEWEST_UNSIGNED_TAG_UTIME ]; then
NEWEST_UNSIGNED_TAG=$TAG
NEWEST_UNSIGNED_TAG_UTIME=$TAG_UTIME
fi
fi
done
if [ $NEWEST_SIGNED_TAG_UTIME -gt -1 ]; then
GIT_TAG="$NEWEST_SIGNED_TAG"
return
fi
if [ $NEWEST_UNSIGNED_TAG_UTIME -gt -1 ]; then
echo "no signed tags found, falling back to unsigned tags" > /dev/null 1>&2
GIT_TAG="$NEWEST_UNSIGNED_TAG"
return
fi
echo "no annotated tags found, not even unsigned" > /dev/null 1>&2
}
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