Prevent commits with keywords you shouldn't ever have in production code. Just put this file under `<repo>/.git/hooks/pre-commit`

pre-commit

#!/bin/sh
 
for FILE in `git diff-index --name-only HEAD --` ; do
    # Check if the file contains 'debugger'
    if cat $FILE | grep -q 'debugger' $FILE; then
        echo $FILE ' contains debugger!'
        exit 1
    fi

    # Check if the file contains 'console.log'
    if cat $FILE | grep -q 'console.log' $FILE; then
        echo $FILE ' contains console.log!'
        exit 1
    fi

    # Check if the file contains 'describe.only'
    if cat $FILE | grep -q 'describe.only' $FILE; then
        echo $FILE ' contains describe.only!'
        exit 1
    fi

    # Check if the file contains 'it.only'
    if cat $FILE | grep -q 'it.only' $FILE; then
        echo $FILE ' contains it.only!'
        exit 1
    fi
done
exit