git commit -a bypasses git hook when it shouldn't

问题

I have a git hook for commit-msg which works quite happily when I run

git commit -m "MSG HERE"

but if I run

git commit -a

Which triggers committing using your text editor it skips the hook.

Any suggestions on how to fix this?

My hook is as follows

#!/bin/bash
if ! egrep -q 'DAVE-[0-9]+' $1 ; then
     echo "No Jira Issue Number found" >&2
     exit 1
fi

if [[ "$(wc -c $1 | awk '{print $1}')" -le 20 ]] ; then
     echo "Commit message too short" >&2
     exit 1
fi

回答1:

I can't reproduce your problem, so my guess here is that there's a misunderstanding -- the commit-msg hook runs after you specified your message, ie. after you close the commit text editor, not before, so you will only notice the changes in your git log.

EDIT:

Are you sure you're not counting comment lines? These would easily blow up the message to above 20 characters. Use something like cat $1|grep -vE '^#'|wc -c|awk ....

来源：https://stackoverflow.com/questions/27983784/git-commit-a-bypasses-git-hook-when-it-shouldnt