remote-branch-info.sh

#!/bin/bash

# Simple script to list last author and commit date, as well as number of
# unmerged commits, for each remote branch of a given remote.
#
# This is useful for analyzing which branches are obsolete and/or moldy.

remote="$*"
if [ "$remote" == "" ];
then
  remote=$(git rev-parse --symbolic-full-name HEAD@{u})
  remote=${remote%/*}
  remote=${remote#refs/remotes/}
  echo Using remote $remote
fi

case "$remote" in
--help|-h)
  echo Please specify one of the following remotes:
  git remote
  exit 1
  ;;
esac

for ref in $(git for-each-ref refs/remotes/$remote --format='%(refname)')
do
  headBranch=$(git remote show "$remote" | grep HEAD | sed 's/ *HEAD branch: //')
  refname=${ref#refs/remotes/$remote/}
  test "$refname" = "$headBranch" -o "$refname" = HEAD && continue
  unmerged_count=$(git cherry "$headBranch" "$ref" | grep '^+' | wc -l)
  author=$(git log -n 1 --format='%an' "$ref")
  timestamp=$(git log -n 1 --format='%ar' "$ref")
  echo "$refname~$author~$timestamp~$unmerged_count unmerged"
done | column -t -s '~'