mgrebenets/git-hooks.md

## git-hooks.md

      
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              git-hooks.md
            
          
    Git Hooks

Use git hooks to automatically add JIRA ID at the start of each commit message.
Main Project Repo

Navigate to the root of the main project repository.
Create a copy of .git/hooks/commit-msg.sample and name it commit-msg.
cp .git/hooks/commit-msg.sample .git/hooks/commit-msg
Remove the example code from it.
# Remove this
test "" = "$(grep '^Signed-off-by: ' "$1" |
	 sort | uniq -c | sed -e '/^[ 	]*1[ 	]/d')" || {
	echo >&2 Duplicate Signed-off-by lines.
	exit 1
}
Add the following bash script code at the end of the file.
# If commit message is a fixup message, ignore it
[[ -n "$(cat $1 | grep 'fixup!')" ]] && FIXUP="YES"

TICKET=$(git symbolic-ref HEAD | rev | cut -d/ -f1 | rev | grep -o -E "[A-Z]+-[0-9]+" | head -n1)
if [[ -n "${TICKET}" && -z "${FIXUP}" ]]; then
	sed -i.bak -e "1s/^/[${TICKET}] /" $1
fi
Submodules

Git hooks for submodules are located in .git/modules/<Submodule/Path>/hooks/. For example .git/modules/Libraries/SomeLib/hooks.
Run this script to use the same gi thooks for all submodules.
for smh in $(find .git/modules -name hooks); do cp -f .git/hooks/commit-msg ${smh}/; done
Make sure you re-run it every time you change the hooks for main repo.