#!/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

# Default to the current release for the new SDK version (minus dev build id)
DEFAULT_SDK="${COREOS_VERSION_STRING%+*}"

DEFINE_integer build "${TODAYS_VERSION}" \
    "Branch name (aka 'build'), should be days since 2013-7-1"
DEFINE_integer branch 0 "Branch revision, normally 0"
DEFINE_integer patch 0 "Branch patch id, normally 0"
DEFINE_string track "dev-channel" "Set the given track to this new branch"
DEFINE_string sdk_version "${DEFAULT_SDK}" \
    "Set the SDK version to use. (current: ${COREOS_SDK_VERSION})"
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-${FLAGS_build}"
BRANCH_VERSION="${FLAGS_build}.${FLAGS_branch}.${FLAGS_patch}"
TAG_NAME="v${BRANCH_VERSION}"

if [[ "${FLAGS_sdk_version}" == keep || "${FLAGS_sdk_version}" == current ]]
then
    FLAGS_sdk_version="${COREOS_SDK_VERSION}"
fi

if [[ "${FLAGS_sdk_version}" == "${BRANCH_VERSION}" ]]; then
    die_notrace "SDK version must be different from the new tag's version!" \
        " Conflicting version: ${BRANCH_VERSION}" \
        "Try --sdk_version keep to use the existing SDK."
fi

cd "${REPO_MANIFESTS_DIR}"

# Clean up existing branch manifest(s) excluding:
# - the current branch if the file already exists.
# - one previous branch, useful for comparing releases.
OLD_BRANCHES=$(find -maxdepth 1 -name 'build-*.xml' \
    -not -name "${BRANCH_NAME}.xml" | sort -rn | tail -n -1)
if [[ -n "${OLD_BRANCHES}" ]]; then
    git rm -f ${OLD_BRANCHES}
fi

repo manifest -o "${BRANCH_NAME}.xml" -r
tee version.txt <<EOF
COREOS_BUILD=${FLAGS_build}
COREOS_BRANCH=${FLAGS_branch}
COREOS_PATCH=${FLAGS_patch}
COREOS_SDK_VERSION=${FLAGS_sdk_version}
EOF
ln -sf "${BRANCH_NAME}.xml" release.xml
git add "${BRANCH_NAME}.xml" release.xml version.txt
info "Creating ${BRANCH_NAME} and tag ${TAG_NAME}"
git commit -m "add(${BRANCH_NAME}): Add manifest for ${TAG_NAME}"
git branch -f "${BRANCH_NAME}"
git tag -m "CoreOS ${TAG_NAME}" "${TAG_NAME}"


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

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