[SOLVED] How to append string to the end of same line of Git commit message with Git commit hook

How to append string to the end of same line of Git commit message with Git commit hook

I'm trying to append a string to the end of a Git commit message and this SO post was a very helpful step in the right direction.

So far, this is working in .git/hooks/prepare-commit-msg but appending my string on a new line:

echo "foo" >> "$1"

with output:

"Initial commit
 foo"

I was looking into how to append on the same line with echo but I'm unable to successfully pass the -n argument to echo in a commit hook. In addition to echo, I also tried printf to no avail as well.

I'm looking to have the my commit message look like:

"Initial commit foo"

How can this be accomplished?

Solution

I finally got it after revisiting this recently. Here's my prepare-commit-hook:

# Append string/emoji to each commit message
commitMsgFile = "$1"
existingMsg = `cat $commitMsgFile`
echo "$existingMsg :shipit:" > "$1"

I was unable to pass echo arguments but I was able to overwrite the original commit message with the addition of the string on the same line. Hope this helps someone in the future.