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+#!/usr/bin/env bash
+#
+# Copyright (c) 2017, Intel Corporation.
+# All rights reserved.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# distrocompare.sh : provides capability to get a list of new packages
+# based on two distinct branches. This script takes
+# 2 parameters; either a commit-ish or a branch name
+#
+# To run : distrocompare.sh <older hash> <newer hash>
+# E.g. distrocompare.sh morty 92aa0e7
+# E.g. distrocompare.sh morty pyro
+#
+
+# get input as version
+previous_version=$1
+current_version=$2
+
+# set previous and current version
+if [ -z "$2" ]; then
+ previous_version=$1
+ current_version="current"
+fi
+
+# get script location. That's where the source supposedly located as well.
+scriptdir="$( realpath $(dirname "${BASH_SOURCE[0]}" ))"
+sourcedir="$( realpath $scriptdir/../.. )"
+
+# create working directory
+workdir=$(mktemp -d)
+
+# prepare to rollback to the branch if not similar
+branch=`cd $sourcedir; git branch | grep \* | cut -d ' ' -f2`
+
+# set current workdir to store final result
+currentworkdir=`pwd`
+
+# persists the file after local repo change
+cp $scriptdir/build-recipe-list.py $workdir
+
+#==================================================================
+
+function bake_distrodata {
+ # get to source directory of the git
+ cd $sourcedir
+
+ # change the branch / commit. Do not change if input is current
+ if [ "$1" != "current" ]; then
+ output=$(git checkout $1 2>&1)
+
+ # exit if git fails
+ if [[ $output == *"error"* ]]; then
+ echo "git error : $output"
+ echo "exiting ... "
+ rm -rf $workdir
+ exit
+ fi
+ fi
+
+ # make tmp as workdir
+ cd $workdir
+
+ # source oe-init to generate a new build folder
+ source $sourcedir/oe-init-build-env $1
+
+ # if file already exists with distrodata, do not append
+ if ! grep -q "distrodata" "conf/local.conf"; then
+ # add inherit distrodata to local.conf to enable distrodata feature
+ echo 'INHERIT += "distrodata"' >> conf/local.conf
+ fi
+
+ # use from tmp
+ $workdir/build-recipe-list.py generate_recipe_list
+}
+
+bake_distrodata $previous_version
+bake_distrodata $current_version
+
+#==================================================================
+
+cd $workdir
+
+# compare the 2 generated recipe-list.txt
+$workdir/build-recipe-list.py compare_recipe $previous_version $current_version
+
+# copy final result to current working directory
+cp $workdir/*_new_recipe_list.txt $currentworkdir
+
+if [ $? -ne 0 ]; then
+ rm -rf $workdir/$previous_version
+ rm -rf $workdir/$current_version
+ rm $workdir/build-recipe-list.py
+ # preserve the result in /tmp/distrodata if fail to copy the result over
+ exit
+fi
+
+# cleanup
+rm -rf $workdir
+
+# perform rollback branch
+cd $sourcedir
+currentbranch=`git branch | grep \* | cut -d ' ' -f2`
+if [ "$currentbranch" != "$branch" ]; then
+ git checkout $branch
+fi
+
+cd $currentworkdir
+
+#==================================================================
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