#!/bin/sh
##########################################################################
#
# This script will automatically bring the local git branch up to date
# with any changes in the main registry repository and will then squash
# the local changes together in to a single commit
#
# use './squash-my-commits -S' to sign the result with your pgp key
#
##########################################################################
do_sign="$1"

# check for dn42registry remote, and add if missing
git remote -v | grep dn42registry > /dev/null 2>&1
if [ "$?" -ne 0 ]
then
    reg='git@git.dn42.dev:dn42/registry.git'
    echo "Adding dn42registry remote: $reg"
    git remote add dn42registry "$reg"
fi

# fail on errors from here onwards
set -e

# ensure the local branch is up to date 
echo "Rebasing local changes against the registry master"
git fetch dn42registry master
git rebase dn42registry/master

# find number of local commits
count=$(git rev-list --count HEAD ^dn42registry/master)

# if there are less then 2 local commits, there's nothing to do
if [ "$count" -lt 2 ]
then
    echo "$count local commits found, no squash is required"
    exit 0
fi

echo "Squashing $count commits ..."

# construct a new comment based on previous commits
comment="squashed commit:

$(git log --oneline HEAD ^dn42registry/master)"

# and finally squash
git reset --soft dn42registry/master
git commit $do_sign -m "$comment"

echo "---"
git log -n 1 --show-signature
echo "---"

echo "Remember to push your changes using: git push --force"
##########################################################################
# end of file