summary of branches

git-branch-status.sh

#!/bin/bash
# based on https://gist.github.com/1288596
RED="\033[0;31m"
YELLOW="\033[0;33m"
GREEN="\033[0;32m"
NOCOLOR="\033[00m"
BOLD="\033[1;37m"

git for-each-ref --format="%(refname:short) %(upstream:short)" refs/heads | \
while read local remote
do
    [ -z "$remote" ] && remote="master"
    git rev-list --left-right ${local}...${remote} -- 2>/dev/null >/tmp/git_upstream_status_delta || continue
    LEFT_AHEAD=$(grep -c '^<' /tmp/git_upstream_status_delta)
    RIGHT_AHEAD=$(grep -c '^>' /tmp/git_upstream_status_delta)
    BRANCH_NAME=$(echo -e "$local:" | sed -e :a -e 's/^.\{1,20\}$/& /;ta')
    echo -ne "${BOLD}${BRANCH_NAME}${NOCOLOR}"
    if [ "$LEFT_AHEAD" -gt 0 ]; then
        if [ "$RIGHT_AHEAD" -gt 0 ]; then
            STATUS="diverged ($LEFT_AHEAD ahead, $RIGHT_AHEAD behind)"
            COLOR="$RED"
        else
            STATUS="ahead ($LEFT_AHEAD commits)"
            COLOR="$GREEN"
        fi
    elif [ "$RIGHT_AHEAD" -gt 0 ]; then
        COLOR="$YELLOW"
        STATUS="behind ($RIGHT_AHEAD commits)"
    else
        COLOR=""
        STATUS="clean"
    fi
    STATUS=$(echo -e "$STATUS" | sed -e :a -e 's/^.\{1,36\}$/& /;ta')
    echo -ne "${COLOR}${STATUS}${NOCOLOR}"
    echo "from $remote"
    rm -f /tmp/git_upstream_status_delta
done