release

#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'

main() {
  validate
  clean
  compile
  compress
  release
}

validate() {
  if [[ -n "$(git status --porcelain)" ]]; then
    echo 'error: repo has uncomitted changes'
    exit 1
  fi

  if [[ "$(git symbolic-ref --short HEAD)" != master ]]; then
    echo 'error: not on the master branch'
    exit 1
  fi

  log 'fetching upstream branches'
  git fetch

  if [[ "$(git rev-parse master)" != "$(git rev-parse origin/master)" ]]; then
    echo 'error: not up to date with origin/master'
    exit 1
  fi

  if ! git describe --tags --exact-match &> /dev/null; then
    echo 'error: current commit is not tagged'
    exit 1
  fi
}

clean() {
  log 'cleaning build directory'
  rm -rf build
  mkdir build
}

compile() {
  log 'cross compiling'
  (cd build && gox -gocmd=vgo ..)
}

compress() {
  log 'compressing binaries'
  for file in build/*; do
    zip "${file%.*}.zip" "$file"
    rm "$file"
  done
}

release() {
  log 'creating release'
  local tag
  tag="$(git describe --tags --exact-match)"
  ghr -username ooesili -repository partygif "$tag" build
}

log() {
  echo "==> $*"
}

main "$@"