tag_release

#!/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_MAJOR=${TODAYS_VERSION}
DEFAULT_MINOR=0
DEFAULT_BRANCH=${FLAGS_FALSE}

CURRENT_VERSION=( ${COREOS_VERSION_ID//./ } )

# Detect if we are on a branch or still tracking master.
DEFAULT_MANIFEST=$(readlink "${REPO_MANIFESTS_DIR}/default.xml") \
    || die "Failed to read default manifest link"
if [[ "${DEFAULT_MANIFEST}" != master.xml ]]; then
    DEFAULT_MAJOR=${CURRENT_VERSION[0]}
    DEFAULT_BRANCH=${FLAGS_TRUE}
fi

# Increment $MINOR if we already made a major release.
if [[ ${DEFAULT_MAJOR} -eq ${CURRENT_VERSION[0]} ]]; then
    DEFAULT_MINOR=$((${CURRENT_VERSION[1]} + 1))
fi

DEFINE_integer major ${DEFAULT_MAJOR} "Branch major version (aka 'build')"
DEFINE_integer minor ${DEFAULT_MINOR} "Branch revision or minor version"
DEFINE_integer patch 0 "Branch patch id, normally 0"
DEFINE_string sdk_version "${COREOS_VERSION_ID}" \
    "SDK version to use, or 'keep'. (current: ${COREOS_SDK_VERSION})"
DEFINE_boolean branch ${DEFAULT_BRANCH} "Release branch, diverge from master"
DEFINE_boolean push ${FLAGS_FALSE} "Push to public manifest repository."
DEFINE_string remote "origin" "Remote name or URL to push to."
DEFINE_string signer '' "Alternate GPG key ID used to sign the tag."

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

# Easy to mix up versions when tagging a branch, so double check.
if [[ ${FLAGS_branch} -eq ${FLAGS_TRUE} ]]; then
    if [[ ${FLAGS_major} -ne ${CURRENT_VERSION[0]} ]]; then
        die_notrace "Branch major should be ${CURRENT_VERSION[0]}"
    fi
    if [[ ${FLAGS_minor} -le ${CURRENT_VERSION[1]} ]]; then
        die_notrace "Branch minor should be greater than ${CURRENT_VERSION[1]}"
    fi
fi

BRANCH_NAME="build-${FLAGS_major}"
BRANCH_VERSION="${FLAGS_major}.${FLAGS_minor}.${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

sign_args=( -s )
if [ -n "${FLAGS_signer}" ]; then
    sign_args=( -u "${FLAGS_signer}" )
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

# transitional, now a file but used to be a symlink.
if [[ -L release.xml ]]; then
    rm release.xml
fi

# Generate a release manifest with all revisions pinned
tmp=$(mktemp --suffix repo)
trap "rm --force ${tmp}" EXIT
repo manifest -o ${tmp} -r
# double check because repo may not exit with non-zero on failure
[[ -s ${tmp} ]] || die "repo failed to generate release.xml (${tmp})"
mv ${tmp} release.xml
git add release.xml

# Generate a branch manifest, unpinning any branched projects.
# OW! Don't hit me! I'll write this for real in Go soon I swear!
sed -e "s%revision=.*upstream=\"refs/heads/${BRANCH_NAME}\"%revision=\"refs/heads/${BRANCH_NAME}\"%" release.xml > "${BRANCH_NAME}.xml"
git add "${BRANCH_NAME}.xml"

if [[ ${FLAGS_branch} -eq ${FLAGS_TRUE} ]]; then
    ln -sf "${BRANCH_NAME}.xml" default.xml
    git add default.xml
fi

tee version.txt <<EOF
COREOS_VERSION=${BRANCH_VERSION}
COREOS_VERSION_ID=${BRANCH_VERSION}
COREOS_BUILD_ID=""
COREOS_SDK_VERSION=${FLAGS_sdk_version}
EOF
git add version.txt

# Help various pinentry programs find the tty.
GPG_TTY=$(tty)
export GPG_TTY

info "Creating ${BRANCH_NAME} and tag ${TAG_NAME}"
git commit -m "${BRANCH_NAME}: release ${TAG_NAME}"
git branch -f "${BRANCH_NAME}"
git tag "${sign_args[@]}" -m "CoreOS ${TAG_NAME}" "${TAG_NAME}"

if [[ ${FLAGS_push} -eq ${FLAGS_TRUE} ]]; then
    master="HEAD:refs/heads/master"
    if [[ ${FLAGS_branch} -eq ${FLAGS_TRUE} ]]; then
        master=""
    fi

    git push "${FLAGS_remote}" $master \
        "refs/heads/${BRANCH_NAME}" \
        "refs/tags/${TAG_NAME}"
fi