pre-commit Shell Example (PHP Lint)

pre-commit

#!/bin/bash

# find the changed files, get the name only and pipe result to a while loop
git diff --cached --name-only | while read FILE; do
# ff file matches extension pattern then
if [[ "$FILE" =~ ^.+(php|inc|module|install|test)$ ]]; then
  # if file is actually and file that exists then
  if [[ -f $FILE ]]; then
    # php lint the file and   
    php -l "$FILE" 1> /dev/null
    # if the result is not equal to 0 then
    if [ $? -ne 0 ]; then
      # show the error in the terminal and exit with a number not equal to 0 so the commit does not get processed
      echo -e "\e[1;31m\tAborting commit due to files with syntax errors" >&2
      exit 1
    fi
  fi
fi
done