Special git cherry-pick with a git rebase interactive

cherrypick_interactive

#!/bin/bash

# Author: Juan Antonio Tubio <jatubio@gmail.com>
# GitHub: https://github.com/jatubio
# Twitter: @jatubio
#
#
# Special git cherry-pick with a git rebase interactive
# To use on branch with the last-commit
#
# Parameters: hash of oldest commit to cherry-pick
#
#

if [ -z $1 ]; then
    echo "Special git cherry-pick with a git rebase interactive.";
	echo "Pass the hash of oldest commit to cherry-pick";
    echo "";
    echo "Usage:  $0 hash";
    echo "";
    exit 1;
fi


# Abort any cherry-pick in progress
GIT_SEQUENCE_DIR=$(git rev-parse --git-dir)/sequencer
if [ -d $GIT_SEQUENCE_DIR ]; then
	echo "Aborting any cherry-pick in progress"
	echo ""
	git cherry-pick --abort
fi

GIT_OLD_BRANCH=$(git current-branch)
GIT_LAST_COMMIT=$(git last-commit)
GIT_FIRST_COMMIT=$1
GIT_TEMP_BRANCH=${GIT_OLD_BRANCH}_${GIT_LAST_COMMIT}_$RANDOM
GIT_BACKUP_BRANCH="backups/cpi/${GIT_OLD_BRANCH}"

# Make one backup
echo Making a Backup of $GIT_OLD_BRANCH onto ${GIT_BACKUP_BRANCH}
echo ""
if [ `git branch --list | grep ${GIT_BACKUP_BRANCH} -i` ]; then
	git branch -D "${GIT_BACKUP_BRANCH}" > /dev/null
fi
git branch "${GIT_BACKUP_BRANCH}" $GIT_OLD_BRANCH

# Make a temporary branch from first commit to pick
echo Making a temporary branch from first commit to pick
echo ""
git branch $GIT_TEMP_BRANCH $GIT_FIRST_COMMIT
git checkout $GIT_TEMP_BRANCH

# Cherry pick all commits onto temporary branch
echo Cherry picking all commits onto temporary branch
echo ""
git cherry-pick $GIT_FIRST_COMMIT..$GIT_LAST_COMMIT
if [ $? -ne 0 ]; then
	echo error on Cherry-picking
	git branch -D "${GIT_TEMP_BRANCH}"
	git checkout $GIT_OLD_BRANCH
	exit 1
fi	

# Git rebase interactive all commits of temporary branch
echo Git rebase interactive all commits of temporary branch
echo ""
git rebase -i ${GIT_TEMP_BRANCH}~$(git first-rebase-commit-counts ${GIT_TEMP_BRANCH})
if [ $? -ne 0 ]; then
	echo error on Git rebase interactive
	git branch -D "${GIT_TEMP_BRANCH}"
	git checkout $GIT_OLD_BRANCH
	exit 1
fi

# Reset old branch head to temporary branch and remove temporary branch
echo Reset old branch head to temporary branch and remove temporary branch
echo ""
git checkout $GIT_OLD_BRANCH
git reset --hard $GIT_TEMP_BRANCH
git branch -D $GIT_TEMP_BRANCH