publish-release

#!/usr/bin/env bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

function show_usage() {
cat << EOF
Usage: publish-release [-t GITHUB_TOKEN] [-r REF] TAG

Try 'publish-release --help' for more information.
EOF
}

function show_help() {
cat << EOF
Usage: publish-release [-t GITHUB_TOKEN] [-r REF] [-n NAME] [-d DIR] TAG

  Publish a Patchwork release to GitHub

  Tags a given REF with TAG, pushes the tag to GitHub, and uses the GitHub
  Releases API to create a release."

  For more information on the GitHub Releases API, refer to the GitHub API
  Documentation:

    https://developer.github.com/v3/repos/releases/

Example:

  publish-release -t ABC123ZYZ -r HEAD v2.0.0

Options:

  -t GITHUB_TOKEN  a GitHub oAuth token used for authentication; use
                   https://github.com/settings/tokens to generate a personal
                   access token
  -r REF           a commit or object; defaults to HEAD
  -n NAME          name for the release; only used if tagging a new release
                   rather than a bugfix release or release candidate
  -d DIR           source directory for Patchwork. Defaults to '../patchwork'
  -v               display version information and exit
  -h               display this help text and exit
EOF
}

#
# Read arguments from user
#

OPTIND=1  # reset in case getopts has been used previously in the shell.

github_token=""
ref="HEAD"
name=""
dir="$DIR/../patchwork"
while getopts "h?r:t:n:d:" opt; do
    case "$opt" in
    h)
        show_help
        exit 0
        ;;
    r)  ref=$OPTARG
        ;;
    t)  github_token=$OPTARG
        ;;
    n)  name=$OPTARG
        ;;
    d)  dir=$OPTARG
        ;;
    esac
done

tag=${*:$OPTIND:1}
if [[ -z "${tag// }" ]]; then
    echo "TAG must be provided"
    exit 2
fi

#
# Useful debug information
#

echo "Debug info -->"
echo ""

echo "dir=$dir"
echo "ref=$ref"
echo "tag=$tag"
echo "name=$name"
echo "github_token=$github_token"

#
# Determine if release is a pre-release, bug fix, or full release
#
if [[ "$tag" =~ ^v[0-9].[0-9].0$ ]]; then
    # MAJOR/MINOR release
    pre_release=false

    release_version="$tag"
    candidate_version=""

    if [[ -z "${name// }" ]]; then
        echo "-n NAME must be specified if tagging a MAJOR.MINOR release"
        exit 2
    fi

    title="$tag (\\\"$name\\\")"
    message="TODO"
elif [[ "$tag" =~ ^(v[0-9].[0-9].)([0-9]+)$ ]]; then
    # PATCH (bugfix) release
    pre_release=false

    release_version="$tag"
    candidate_version=""
    old_version="${BASH_REMATCH[1]}$((${BASH_REMATCH[2]}-1))"

    title="$tag"
    message="This release fixes a number of bugs found in the $old_version release."
elif [[ "$tag" =~ ^(v[0-9].[0-9].0)-rc([0-9])$ ]]; then
    # release candidate
    pre_release=true

    release_version="${BASH_REMATCH[1]}"
    candidate_version="${BASH_REMATCH[2]}"

    title="$release_version Release Candidate $candidate_version"
    message="This is release candidate $candidate_version of Patchwork $release_version"
else
    show_usage
    exit 2
fi

echo "pre_release=$pre_release"
echo "release_version=$release_version"
echo "candidate_version=$candidate_version"
echo "message=$message"

# Main function

echo ""
echo "Tagging release '$ref' with '$tag' -->"
echo ""

pushd "$dir"

if ! git tag -a -m "Version $tag" "$tag"; then
    echo "Failed to tag release"
    exit 2
fi

echo ""
echo "Push Tags -->"
echo ""

git push --tags

popd

echo ""
echo "Publish Release -->"
echo ""

releases_json=$(printf '{"tag_name": "%s","target_commitish": "master","name": "%s","body": "%s","draft": false,"prerelease": %s}' "$tag" "$title" "$message" "$pre_release")
curl --data "$releases_json" "https://api.github.com/repos/getpatchwork/patchwork/releases?access_token=$github_token"