#!/bin/bash

. build/envsetup.sh

PLATFORM="${1}"
SQUASH="${2}"

TOP="${ANDROID_BUILD_TOP}"
MANIFEST="${TOP}/.repo/manifest.xml"
BRANCH=$(grep "default revision" "${MANIFEST}" \
        | sed 's/^ *//g;s/<default revision=\"refs\/heads\///g;s/\"//g')
STAGINGBRANCH="${BRANCH}-${PLATFORM}-gsi"

# Build list of LineageOS forked repos
PROJECTBLACKLIST="Gallery2"
PROJECTPATHS=$(grep "name=\"LineageOS/" "${MANIFEST}" \
        | grep -v "clone-depth=\"1\"" \
        | egrep -v ${PROJECTBLACKLIST} \
        | sed -n 's/.*path="\([^"]\+\)".*/\1/p')

repo abandon "${STAGINGBRANCH}"

# Iterate over each forked project
for PROJECTPATH in ${PROJECTPATHS}; do
    cd "${TOP}/${PROJECTPATH}"
    repo start "${STAGINGBRANCH}" .
    aospremote | grep -v "Remote 'aosp' created"
    git fetch -q aosp "${PLATFORM}"-gsi

    echo "#### Merging ${PLATFORM} into ${PROJECTPATH} ####"
    if [ ! -z $SQUASH ]; then
        git merge --log --squash aosp/"${PLATFORM}"-gsi
        if [ $? -eq 1 ]; then read; fi
        if ! git diff --cached --exit-code > /dev/null; then
            git commit --no-edit
            OLD_MSG=$(git log --format=%B -n1)
            git commit --amend -m "[DNM] Squash of ${STAGINGBRANCH}" -m "$OLD_MSG"
        fi
    else
        git merge --log aosp/"${PLATFORM}"-gsi
        if [ $? -eq 1 ]; then read; fi
    fi
done