A pre-commit hook for git running on OS X to abort if it detects keywords in specified files (this version is setup for .coffee and .js files).

README.md

Git pre-commit Hooks

The pre-commit file listed here is setup to scan files for invalid keywords prior to commit to avoid debug or logging information making its way into production files. Right now it is setup to scan only .js and .coffee files for the following keywords:

KEYWORDS_REGEX="console\.(debug|info|log|warn)\(|alert\(|debugger"
EXTENSIONS_REGEX="(.js$|.coffee$)"

Installing the Hook

• cp pre-commit .git/hooks/
• chmod +x .git/hooks/pre-commit

Credits

• modified from: https://github.com/borisguery/git-keywords-checker

pre-commit

#!/usr/bin/env bash
# https://github.com/borisguery/git-keywords-checker

# Add or remove keywords here
KEYWORDS_REGEX="console\.(debug|info|log|warn)\(|alert\(|debugger"
# Add extensions to check here
EXTENSIONS_REGEX="(.js$|.coffee$)"

ERRORS_BUFFER=""
TEXT_DEFAULT="\\033[0;39m"
TEXT_INFO="\\033[1;32m"
TEXT_ERROR="\\033[1;31m"
TEXT_UNDERLINE="\\0033[4m"
TEXT_BOLD="\\0033[1m"
VERBOSE=false

FILES=$(git diff-index --cached --name-only --diff-filter=ACMR HEAD)

echo -e "\\033[1;33m""Keywords checker - pre-commit hook" "$TEXT_DEFAULT"
echo

for FILE in $FILES; do
     if [[ $FILE =~ $EXTENSIONS_REGEX ]]; then
        ERRORS=""
        while IFS=: read -ra RESULT; do
            if [ "$RESULT" != "" ]; then
                ERRORS="$ERRORS\n\tline $TEXT_BOLD${RESULT[1]}$TEXT_DEFAULT: "
                ERRORS="$ERRORS"$(sed -n ${RESULT[1]}p $FILE | sed -E "s/($KEYWORDS_REGEX)/\\$TEXT_UNDERLINE\1\\$TEXT_DEFAULT/g")
                if [ "$ERRORS_BUFFER" != "" ]; then
                    ERRORS_BUFFER="$ERRORS_BUFFER\n$ERRORS"
                else
                    ERRORS_BUFFER="$ERRORS"
                fi
            fi
        done < <(grep -sEnH $KEYWORDS_REGEX $FILE)
        if [ "$ERRORS" != "" ]; then
            ERRORS="$TEXT_ERROR Errors found in $TEXT_BOLD$FILE$TEXT_DEFAULT$ERRORS"
            echo -e "$ERRORS"
        fi
     fi
done

if [ "$ERRORS_BUFFER" != "" ]; then
    echo
    echo -e "$TEXT_ERROR" "There were errors or warnings, commit aborted." "$TEXT_DEFAULT"
    echo -e "$TEXT_INFO" "If you are sure you want to commit those files, use --no-verify option" "$TEXT_DEFAULT"

    exit 1
else
    echo -e "$TEXT_INFO" "All files are clean." "$TEXT_DEFAULT"
    exit 0
fi

Also take a look at git-hooks for managing hooks across repos (can be installed global, per user, or per repo). Useful to avoid copy/pasta hooks.