#!/bin/bash

shopt -s nullglob

function help {
  echo "${1}Runs a command on all git directories below the current directory or a specified directory.
Skips directories that contain a file called .ignore.

Usage: $(basename $0) [options] command [directory]

Where:
  command is any command to run in each repository directory, such as 'commit'.
  Options are:
    -d  - Debug mode on
    -n  - Do not supply the git repository directory name to the command
    -m  - Specify argument to pass to command, after -m
    -h  - Show this help text
    -q  - Just show processed directory names
    -Q  - Don't show any information messages

Examples:
  $(basename $0) 'ls -1'     # Show directory contents of the top directory of each git repository
  $(basename $0) -q 'ls -1'  # As above, with less noise
  $(basename $0) -Q 'ls -1'  # As above, with even less noise (just shows contents of all directories run together)
  $(basename $0) -m 'Initial Commit' commit
  $(basename $0) -m 'Initial Commit' commit \$work
"
  exit 1
}

function forALL {
  if [ ! "$QUIET" ]; then echo -e "\n${HIGHLIGHT}Scanning $( pwd )$NORMAL"; fi
  for d in */; do
    #echo "Directory \"$d\" found"
    pushd "$d" > /dev/null
    #echo "Working in $( pwd )"
    if [ -e ".ignore" ]; then
      if [ ! "$QUIET" ]; then echo -e "\n${HIGHLIGHT}Ignoring `pwd`${NORMAL}"; fi
    else
      if [ -d .git ]; then
        if [ ! "$QUIET" == really ]; then echo -e "\n${HIGHLIGHT}Processing `pwd`$NORMAL"; fi
        #echo "COMMAND=$COMMAND"
        if [ "$PROVIDE_DIRECTORY" ]; then
          eval "$COMMAND" `pwd`
        else
          eval "$COMMAND"
        fi
      else
        forALL .
      fi
    fi
    popd > /dev/null
  done
}


export HIGHLIGHT="\e[01;34m"
export NORMAL='\e[00m'
export REPO=origin
export MSG="-"
export PROVIDE_DIRECTORY=true
unset  QUIET
while getopts "dhm:n\?qQ" opt; do
   case $opt in
     d) set -xv ;;
     m) export MSG="$OPTARG" ;;
	   n) unset PROVIDE_DIRECTORY ;;
     q) export QUIET=true ;;
     Q) export QUIET=really ;;
     *) help ;;
   esac
done
shift $(($OPTIND-1))

if [ -z "$1" ];then help "Error: No command given to execute.\n\n"; fi
export COMMAND="$1"
shift

if [ "$1" ]; then
  cd "$1" > /dev/null
  shift
fi

forALL .