git-trim

#!/bin/sh
#
# Copyright (c) 2012 Dustin Barker
#
# 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.

all=.git-trim-all
keep=.git-trim-keep

cleanup() {
  rm $all $keep
}

if [ $# -eq 0 ]
then
  branches=`git branch`
else
  branches=`git ls-remote --heads $1 | awk '{print $2}' | awk 'BEGIN { FS = "/" } ; {print $3}'`
fi

if [ $? != 0 ]; then
  exit 1
fi

if [[ ! $EDITOR ]]; then
  EDITOR=vim
fi

echo "$branches" | grep -v '^*' | sed 's/^  //' | tee $all $keep > /dev/null

if [ `cat $all | wc -l` == 0 ]; then
  echo "No branches found to delete (cannot delete current branch)."
  cleanup
  exit 0
fi

cat >> $keep << EOF

#  Remove the branches you would like to delete.

EOF

eval $EDITOR $keep

if [ $? != 0 ]; then
  echo "Unable to open editor '$EDITOR'. Check value of \$EDITOR and try again."
  cleanup
  exit 1
fi

delete=`diff --suppress-common-lines $all $keep | grep '^< ' | awk '{print $2}'`

if [ $# -eq 0 ]
then
  echo $delete | xargs git branch -D
else
  for branch in $delete
  do
    git push $1 :$branch
  done
fi

cleanup