#!/bin/bash

# Copyright (c) 2013 The CoreOS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
. "${SCRIPT_ROOT}/common.sh" || exit 1

DEFINE_integer build "${TODAYS_VERSION}" \
    "Branch name (aka 'build'), should be days since 2013-7-1"
DEFINE_integer branch 0 "Branch revision, should be 0"
DEFINE_string patch 0 "Branch patch id, should be 0"
DEFINE_string track "dev-channel" "Set the given track to this new branch"
DEFINE_string sdk_version "${COREOS_SDK_VERSION}" "Set the SDK build to use"
DEFINE_boolean push ${FLAGS_FALSE} "Push to public manifest repository."
DEFINE_string remote "origin" "Remote name or URL to push to."

# Parse flags
FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"
switch_to_strict_mode

BRANCH_NAME="build-${FLAGS_build}"
TAG_NAME="v${FLAGS_build}.${FLAGS_branch}.${FLAGS_patch}"

cd "${GCLIENT_ROOT}/.repo/manifests"
git checkout -b "${BRANCH_NAME}"
repo manifest -o "${BRANCH_NAME}.xml" -r
ln -sf "${BRANCH_NAME}.xml" default.xml
tee version.txt <<EOF
COREOS_BUILD=${FLAGS_build}
COREOS_BRANCH=${FLAGS_branch}
COREOS_PATCH=${FLAGS_patch}
COREOS_SDK_VERSION=${FLAGS_sdk_version}
EOF
git add "${BRANCH_NAME}.xml" default.xml version.txt
info "Creating ${BRANCH_NAME} with tag ${TAG_NAME}"
git commit -m "add(${BRANCH_NAME}): Add branched manifest for ${TAG_NAME}"
git tag -m "CoreOS ${TAG_NAME}" "${TAG_NAME}" "${BRANCH_NAME}"


PUSH_TRACK=
if [[ -n "${FLAGS_track}" ]]; then
    git branch -f "${FLAGS_track}" "${BRANCH_NAME}"
    info "Setting ${FLAGS_track} to ${BRANCH_NAME}"
    PUSH_TRACK=1
fi

if [[ ${FLAGS_push} -eq ${FLAGS_TRUE} ]]; then
    git push "${FLAGS_remote}" "refs/heads/${BRANCH_NAME}" \
        ${PUSH_TRACK:+"+refs/heads/${FLAGS_track}"} \
        "refs/tags/${TAG_NAME}"
fi