#!/bin/bash
set -euo pipefail

GO="${GO:-go}"
RELEASE_LDFLAGS="-s -w $LDFLAGS"
RELEASE_TAGS="bindata $TAGS"
RELEASE_PATH_PREFIX="${DIST}/binaries/gitea-${VERSION##*/}"

RELEASE_PLATFORMS_DEFAULT=(
  linux/amd64 linux/arm-5 linux/arm-6 linux/arm64 linux/riscv64 \
  windows/amd64 windows/arm64 \
  darwin/amd64 darwin/arm64 \
  freebsd/amd64
)

RELEASE_PLATFORMS_GOGIT=(windows/amd64 windows/arm64)

build() {
  echo "building ${*} ..."
  local target="${1:?}"
  local variant="${2:-}"

  local goos="${target%%/*}"
  local goarch="${target##*/}"
  local goarm=""
  if [[ "$goarch" == arm-* ]]; then
    goarm="${goarch#arm-}"
    goarch="arm"
  fi

  local tags="${RELEASE_TAGS}"
  local suffix
  if [[ "$variant" == "gogit" ]]; then
    tags="gogit${tags:+ ${tags}}"
    suffix="-gogit-${target//\//-}"
  else
    suffix="-${target//\//-}"
  fi

  local output="${RELEASE_PATH_PREFIX}${suffix}"
  local args=()
  if [[ "$goos" == "windows" ]]; then
    output="${output}.exe"
  fi
  args+=(-tags "$tags")
  args+=(-ldflags "$RELEASE_LDFLAGS")
  echo "  args: ${args[*]}"
  echo "  output: ${output}"
  # must disable CGO (host compiler & linker) to get host-independent static builds
  CGO_ENABLED=0 GOOS="$goos" GOARCH="$goarch" GOARM="$goarm" "$GO" build "${args[@]}" -o "$output" .
}

main() {
  # When building release binaries, some TAGS (bindata) are needed by the release script,
  # so here it needs to use the TAGS to generate the assets (embed bindata).
  echo "generating assets with tags=${RELEASE_TAGS}"
  "$GO" generate -tags "${RELEASE_TAGS}" ./...
  local platform="${1:-}"
  for target in "${RELEASE_PLATFORMS_DEFAULT[@]}"; do
    if [[ -z "$platform" || "$target" == "$platform/"* ]]; then
      build "$target"
    fi
  done

  for target in "${RELEASE_PLATFORMS_GOGIT[@]}"; do
    if [[ -z "$platform" || "$target" == "$platform/"* ]]; then
      build "$target" "gogit"
    fi
  done
}

main "$@"