#!/bin/bash

# clones and updates a dist-git repo

# shellcheck disable=SC2164

function die
{
	echo "Error: $1" >&2;
	exit 1;
}

function upload()
{
	[ -n "$RH_DIST_GIT_TEST" ] && return
	$RHPKG_BIN new-sources "$@" >/dev/null || die "uploading $*";
}

if [ -z "$RHDISTGIT_BRANCH" ]; then
	echo "$0: RHDISTGIT_BRANCH is not set" >&2
	exit 1
fi

echo "Cloning the repository"
# clone the dist-git, considering cache
date=$(date +"%Y-%m-%d")
tmpdir="$(mktemp -d --tmpdir="$RHDISTGIT_TMP" RHEL"$RHEL_MAJOR"."$date".XXXXXXXX)"
cd "$tmpdir" || die "Unable to create temporary directory";
echo "Cloning using $RHPKG_BIN" >&2;
# shellcheck disable=SC2086
eval $RHPKG_BIN clone "kernel-headers" >/dev/null || die "Unable to clone using $RHPKG_BIN";

echo "Switching the branch"
# change in the correct branch
cd "$tmpdir/kernel-headers";
$RHPKG_BIN switch-branch "$RHDISTGIT_BRANCH" || die "switching to branch $RHDISTGIT_BRANCH";

echo "Unpacking from SRPM"
"$REDHAT"/scripts/expand_srpm.sh "$tmpdir"
git reset HEAD -- README.md
git checkout README.md
git add README.md

# upload tarballs
upload_list="kernel-headers-$UPSTREAM_TARBALL_NAME.tar.xz"

echo "Uploading new tarballs: $upload_list"
# We depend on word splitting here:
# shellcheck disable=SC2086
upload $upload_list

echo "Creating diff for review ($tmpdir/diff) and changelog"
# diff the result (redhat/git/dontdiff). note: diff reuturns 1 if
# differences were found
diff -X "$REDHAT"/git/dontdiff -upr "$tmpdir/kernel-headers" "$REDHAT"/rpm/SOURCES/ > "$tmpdir"/diff;

# all done
echo "$tmpdir"