Git pre-commit hook: ban "nocommit" lines, do not allow to commit

pre-commit

#!/bin/bash

# .git/hooks/pre-commit
# Find "//nocommit" lines in the diff, do not allow them

# This line will output all "nocommit" lines, if any: you'll see this as git error.
git diff --no-ext-diff --cached | grep -iE '//\s*nocommit'

# If the retcode=0, then "nocommit" lines were found. Fail on them.
if [[ $? -eq 0  ]]; then
    echo "WARNING: You are going to commit some 'nocommit' lines!"
    echo
    echo "You can ignore this warning by running the commit command with '--no-verify'"
    exit 1
fi