Trying to grep from the input COMMIT_EDITMSG file in a hook fails

[endika-campo]

Context

When trying to grep from the input COMMIT_EDITMSG ($1) file in the prepare-commit-msg hook makes it fail without any relevant trace nor error message.

• The version of terminal is zsh 5.9 on a Mac
• Husky version 9.0.11
• Try to grep from the $1 input variable in the aforementioned hook. It doesn't execute the hook as it fails on that line.

You have the following code I am currently using on my prepare-commit-msg. It executes correctly until it reaches line COMMIT_TYPE_PRESENT_IN_MESSAGE=$(echo $COMMIT_MESSAGE | grep -Eo "^(${COMMIT_TYPE_LITERALS}):").

I have correctly extract the contents of the $1 file with cat, but as soon as I try to grep anything from it, the hook fails.

#!/bin/sh

COMMIT_TYPE_LITERALS='feat|fix|docs|style|refactor|test|chore|perf|test|build|ci|chore|revert'

BRANCH_NAME=$(git symbolic-ref --short HEAD)
TICKET_ID=$(echo $BRANCH_NAME | grep -Eo 'CU-.{9}')
COMMIT_TYPE=$(echo $BRANCH_NAME | grep -Eo "^(${COMMIT_TYPE_LITERALS})")
COMMIT_MESSAGE=$(cat $1)

COMMIT_TYPE_PRESENT_IN_MESSAGE=$(echo $COMMIT_MESSAGE | grep -Eo "^(${COMMIT_TYPE_LITERALS}):")

if [ $COMMIT_TYPE_PRESENT_IN_MESSAGE ];
then
    CLEAN_COMMIT_MESSAGE=$(echo $COMMIT_MESSAGE | grep -E "^(${COMMIT_TYPE_LITERALS}):" | sed 's/^.*:https://')
    sed -i.bak -e "s/.*:/$COMMIT_TYPE_PRESENT_IN_MESSAGE $TICKET_ID | /" $1
else
    sed -i.bak -e "1s~^~$COMMIT_TYPE: $TICKET_ID | ~" $1
fi