#!/bin/sh

# Script for generating a list of candidates for cherry-picking to a stable branch
#
# Usage examples:
#
# $ bin/get-pick-list.sh
# $ bin/get-pick-list.sh > picklist
# $ bin/get-pick-list.sh | tee picklist
#
# The output is as follows:
# [nomination_type] commit_sha commit summary

is_stable_nomination()
{
	git show --summary "$1" | grep -q -i -o "CC:.*mesa-stable"
}

is_typod_nomination()
{
	git show --summary "$1" | grep -q -i -o "CC:.*mesa-dev"
}

# Use the last branchpoint as our limit for the search
latest_branchpoint=`git merge-base origin/master HEAD`

# Grep for commits with "cherry picked from commit" in the commit message.
git log --reverse --pretty=medium --grep="cherry picked from commit" $latest_branchpoint..HEAD |\
	grep "cherry picked from commit" |\
	sed -e 's/^[[:space:]]*(cherry picked from commit[[:space:]]*//' -e 's/)//' > already_picked

# Grep for commits that were marked as a candidate for the stable tree.
git log --reverse --pretty=%H -i --grep='^CC:.*mesa-stable\|^CC:.*mesa-dev' $latest_branchpoint..origin/master |\
while read sha
do
	# Check to see whether the patch is on the ignore list.
	if [ -f bin/.cherry-ignore ] ; then
		if grep -q ^$sha bin/.cherry-ignore ; then
			continue
		fi
	fi

	# Check to see if it has already been picked over.
	if grep -q ^$sha already_picked ; then
		continue
	fi

	if is_stable_nomination "$sha"; then
		tag=stable
	elif is_typod_nomination "$sha"; then
		tag=typod
	else
		continue
	fi

	printf "[ %8s ] " "$tag"
	git --no-pager show --summary --oneline $sha
done

rm -f already_picked