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#!/bin/bash
# by http://github.com/jehiah
# this prints out some branch status (similar to the '... ahead' info you get from git status)

# example:
# $ git branch-status
# dns_check (ahead 1) | (behind 112) origin/master
# master (ahead 2) | (behind 0) origin/master

git for-each-ref --format="%(refname:short) %(upstream:short)" refs/heads | \
while read local remote
do
    [ -z "$remote" ] && continue
    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)
    echo "$local (ahead $LEFT_AHEAD) | (behind $RIGHT_AHEAD) $remote"
done