List all remote local or branches in your repo, along with colourful freshness information!

git-list-branches.sh

#!/bin/bash
#
# List branch status and age against an integration branch.
#
# Copyright (C) 2012 Julien Letessier
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is furnished to do
# so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
PROGNAME=$(basename $0)


_has_git() {
  git rev-parse head > /dev/null 2>&1
}

_check_branches_format() {
  if [ $porcelain = no ] ; then
    echo "%-10s %70s +%-6s -%-6s %-18s %s\n"
  else
    echo "%s,%s,%s,%s,%s,%s\n"
  fi
}

_xterm_color() {
  color=$(( 16 + ($1 * 36) + ($2 * 6) + $3 ))
  echo "\033[38;5;${color}m"
}

_xterm_escape() {
	echo "\033[$1m"
}


_list_branches() {
  case $1 in
    remote)
      git show-ref | fgrep remotes/origin | sed -e 's:.*remotes/::'
      ;;
    local)
      git show-ref --heads | sed -e 's:.*refs/heads/::'
      ;;
  esac
}

_check_branch() {
  branch=$1
  against=$2
  ahead=$(git rev-list $branch ^$against | wc -l)
  behind=$(git rev-list $against ^$branch | wc -l)
  stamp=$(_rev_stamp $branch)
  if [ $behind -gt 0 ] ; then
    behind_last=$(git rev-list --reverse $against ^$branch | head -1)
    behind_by=$(_rev_age $behind_last)
  else
    behind_by=""
  fi
  
  branch_latest=$(git rev-list -n 1 $branch)
  who=$(_rev_author $branch_latest)

  printf "$(_check_branches_format)" $stamp $branch $ahead $behind "$behind_by" "$who"
}

_rev_age() {
  git log -1 --format='%ar' $1
}

_rev_stamp() {
  git log -1 --format='%at' $1
}

_rev_author() {
  git log -1 --format='%an' $1
}

_check_all_branches() {
  for branch in $(_list_branches $1) ; do
    _check_branch $branch $2
  done
}

_color_by_duration() {
  while read LINE ; do
    case "$LINE" in
      (*minute*)  color=$(_xterm_color 0 5 0) ;;
      (*hour*)    color=$(_xterm_color 0 5 0) ;;
      (*days*)    color=$(_xterm_color 5 5 0) ;;
      (*week*)    color=$(_xterm_color 5 3 0) ;;
      (*month*)   color=$(_xterm_color 5 0 0) ;;
      (*year*)    color=$(_xterm_color 4 0 0) ;;
      (*)         color=$(_xterm_escape 0) ;;
    esac
    normal=$(_xterm_escape 0)
    printf "${color}${LINE}${normal}\n"
    # echo "$LINE"
  done
}

_usage() {
  echo
  echo "$(basename $0) [-l] [-r] [-i integration-branch]"
  echo
  echo "  -l : show local branches (default)"
  echo "  -r : show remote branches"
  echo "  -i [branch] : integration branch, defaults to 'origin/master'"
}

_die() {
  echo "$@" >&2
  exit 1
}

while getopts hprli: opt ; do
  case $opt in
    h) _usage ; exit 0 ;;
    p) porcelain="yes" ;;
    l) where="local" ;;
    r) where="remote" ;;
    i) against="$OPTARG" ;;
    \?) _die ;;
    :)  _die "Option -$OPTARG requires an argument." ;;
    *) echo "argument $OPTARG" ;; 
  esac
done
shift $((OPTIND-1))

[ $# -gt 0 ] && _usage && _die "Too many arguments."

_has_git || die "Not in a git repository !"

: ${porcelain:=no}
: ${where:=local}
: ${against:=origin/master}

if [ $porcelain = no ] ; then
  echo "Listing $where branches against $against"
  printf "$(_check_branches_format)" "TIMESTAMP" "BRANCH NAME" "AHEAD" "BEHIND" "OLDEST UNPULLED" "AUTHOR"
  _check_all_branches $where $against |  _color_by_duration
else
  _check_all_branches $where $against
fi

Now part of Git Whilstles. I won't maintain the Gist directly... sorry.