#!/bin/bash
#
# This script takes patches stored in the bundle and places
# them into a branch named frombundle for each local repo it
# finds.

# NYI: report if the required base commit isn't there - they may need to fetch the latest from upstream

set -e

source ./config.sh

rm -rf $GIT_DIR
rm -rf $CMP_DIR
rm -rf $BUNDLE_DIR
rm -f checkpatch.log

mkdir -p $BUNDLE_DIR
tar xJf bundles.tar.xz -C $BUNDLE_DIR
BUNDLE_FILES=$(find $BUNDLE_DIR -printf "%P\n"|grep "bundle$")

for entry in ${BUNDLE_FILES[@]}; do
    if [[ $entry =~ ^(.*)[/]*([a-f0-9]{40})[.]bundle$ ]]; then
        SUBDIR=${BASH_REMATCH[1]}
        GITREPO_COMMIT_ISH=${BASH_REMATCH[2]}
    else
        echo "ERROR! BAD BUNDLE CONTENT!"
        exit
    fi
    for (( i=0; i <$REPO_COUNT; i++ )); do
        if [[ "$SUBDIR" = "${PATCH_PATH_MAP[$i]}" ]]; then
	    PATCH_RANGE_INDEX=$i
	    break
        fi
    done

    LOCAL_REPO=$(readlink -f ${LOCAL_REPO_MAP[$PATCH_RANGE_INDEX]})
    if [ -e $LOCAL_REPO ]; then
        echo "Found local repo $LOCAL_REPO corresponding to archived git bundle"
    else
        echo "No local repo $LOCAL_REPO corresponding to archived git bundle"
    fi
    git -C $LOCAL_REPO remote remove bundlerepo || true
# git won't let you delete this branch if it's the current branch (returns 1) HOW TO HANDLE?
# detect this case, and ask user to switch to another branch? or do it for them - switch to master killing any "state" for this branch
    git -C $LOCAL_REPO branch -D frombundle || true
    git -C $LOCAL_REPO remote add bundlerepo $BUNDLE_DIR/$entry 
    # in next, the head may be FETCH_HEAD or HEAD depending on how we created:
    git -C $LOCAL_REPO fetch bundlerepo FETCH_HEAD
    #git -C $LOCAL_REPO fetch bundlerepo HEAD
    git -C $LOCAL_REPO branch frombundle FETCH_HEAD
    git -C $LOCAL_REPO remote remove bundlerepo
done
echo "For each local repo found a branch named frombundle contains the patches from the bundle."
echo "Use this as the starting point for making changes to the $GIT_BRANCH, which gets used as"
echo "the source when updating the bundle stored with the package."
rm -rf $BUNDLE_DIR