pre-commit.sh

#!/bin/bash

# COLORS!!!!
RED=$(tput setaf 1)
CLR=$(tput sgr0)

# 1. grab pending chagnes
# 2. remove ?? files that aren't part of the commit
# 3. only grab things in the index
git status --porcelain |\
grep -v '^??'          |\
grep '^[MA]'           |\
while read line; do

  # the file path
  file=$(echo "$line" | sed 's/...//')

  # fail if a file has unstaged modifications
  # a file is staged if it's got M/A in the first column
  # a file has unstanged changes if it's got M in the second column
  # e.g. 
  # 
  #  M file-unstange with modifications
  # M  modified file-staged 
  # MM file with staged *and* unstanged modifications
  # 
  if [[ "$line" =~ ^.[MA].* ]]; then 
    echo "${RED}Cannot JSHint on Dirty File $file${CLR}"
    exit -2 
  fi

  # we should only JSHint staged files
  echo "Testing JSHINT: $file"
  jshint $file || exit -1

done

# bail if shit goes south
if [[ $? -ne 0 ]]; then
  echo -e "${RED}Commit Failed JSHint${CLR}"
  exit 1
fi