#!/usr/bin/env bash
# Maintainer: alfador <contact@havi.dev>
_pkgname="go"
_branch="master"
# shellcheck disable=SC2034
pkgname="${_pkgname}-git"
# shellcheck disable=SC2034
pkgver=1.17.5
# shellcheck disable=SC2034
pkgrel=1
# shellcheck disable=SC2034
epoch=1
# shellcheck disable=SC2034
pkgdesc='Latest stable core compiler tools for the Go programming language.'
# shellcheck disable=SC2034
arch=("x86_64")
# shellcheck disable=SC2034
url='https://golang.org'
# shellcheck disable=SC2034
license=("BSD")
# shellcheck disable=SC2034
makedepends=(
  "git"
  "perl"
  "golang-go" # Go is a self-hosting compiler so we install a base version for the build.
  "netbase" # Required for tests
)
# shellcheck disable=SC2034
options=(!strip staticlibs)
# shellcheck disable=SC2034
source=("${_pkgname}::git+https://go.googlesource.com/go#branch=${_branch}")
# shellcheck disable=SC2034
md5sums=('SKIP')
postinst=post.install
# ────────────────────────────────────────────────────────────────────────────────
export GOOS="linux"
export GOARCH="amd64"
export GOROOT_FINAL="/usr/lib/go"
export GOROOT_BOOTSTRAP="/usr/lib/go"
# ────────────────────────────────────────────────────────────────────────────────
prepare() {
  cd "${_pkgname}" || exit 1
  git reset --hard
  git fetch --all --tags
  git clean -xdf
  git checkout "tags/go${pkgver}"
}
pkgver() {
  cd "${_pkgname}" || exit 1
  git tag |
      grep 'go' |
      grep -vP '(rc|beta)' |
      sed 's/go//g' |
      sort -bt. -k1,1 -k2,2n -k3,3n -k4,4n -k5,5n |
      tail -n1
}
build() {
  export GO_LDFLAGS="-buildmode=pie"
  # shellcheck disable=SC2154
  export GOPATH="${srcdir}"
  export GOROOT="${srcdir}/go"
  export GOBIN="${GOROOT}/bin"
  cd  "${GOROOT}/src" || exit 1
  ./make.bash -v
}

# check() {
#   # shellcheck disable=SC2154
#   export GOPATH="${srcdir}"
#   export GOROOT="${srcdir}/go"
#   export GOBIN="${GOROOT}/bin"
#   export PATH="${GOROOT}/bin:${PATH}"
#   export GO_TEST_TIMEOUT_SCALE="2"
#   cd "${GOROOT}/src" || exit 1
#   ./run.bash --no-rebuild -v -v -v -k
# }

package() {
  # shellcheck disable=SC2034
  provides=("go")
  # shellcheck disable=SC2034
  conflicts=("go" "golang-go")
  cd "${_pkgname}" || exit 1
  # ─── COPYING GO SOURCE FILES ────────────────────────────────────────────────────
  # shellcheck disable=SC2154
  install -d "${pkgdir}/usr/bin" "${pkgdir}/usr/lib/go" "${pkgdir}/usr/share/doc/go"
  cp -a "bin" "pkg" "src" "lib" "misc" "${pkgdir}/usr/lib/go"
  cp -r "doc/"* "${pkgdir}/usr/share/doc/go"
  # ─── LINKING BINARIES ───────────────────────────────────────────────────────────
  ln -sf "/usr/lib/go/bin/go" "${pkgdir}/usr/bin/go"
  ln -sf "/usr/lib/go/bin/gofmt" "${pkgdir}/usr/bin/gofmt"
  # ─── DOCUMENTS AND MANPAGES ─────────────────────────────────────────────────────
  ln -sf "/usr/share/doc/go" "${pkgdir}/usr/lib/go/doc"
  install -Dm644 "VERSION" "${pkgdir}/usr/lib/go/VERSION"
  # ─── LICENCE ────────────────────────────────────────────────────────────────────
  install -Dm644 "LICENSE" "${pkgdir}/usr/share/licenses/go/copyright"
  # ─── CLEANUP ────────────────────────────────────────────────────────────────────
  rm -rf "${pkgdir}/usr/lib/go/pkg/bootstrap"
  rm -rf "${pkgdir}/usr/lib/go/pkg/tool/*/api"
}
# [ NOTE ] => This pkgbuild is based on
# - https://aur.archlinux.org/packages/go-git
# - https://git.alpinelinux.org/aports/tree/community/go/APKBUILD