# Maintainer: unom <noreply@anthropic.com>
#
# Arch Linux / SteamOS package for the punktfunk streaming HOST. Mirrors the artifact
# set of packaging/rpm/punktfunk.spec and packaging/debian/build-deb.sh exactly.
#
# Two build modes:
#   - AUR / standalone:  makepkg in this dir (fetches the git tag below).
#   - In-tree / CI:       PF_SRCDIR=$(git rev-parse --show-toplevel) makepkg --holdver
#                         (builds the working tree instead of the tagged source — see build()).
#
# IMPORTANT: encode is NVENC-only (crates/punktfunk-host/src/encode/linux.rs). This package is
# functional on NVIDIA hosts (nvidia-utils + Arch's NVENC-enabled ffmpeg). On an AMD Steam Deck
# it installs but CANNOT encode until a VAAPI (hevc_vaapi) backend exists — see packaging/arch/README.md.
pkgname=punktfunk-host
pkgver=0.0.1
pkgrel=1
pkgdesc="Low-latency desktop/game streaming host (Moonlight-compatible + punktfunk/1)"
arch=('x86_64')
url="https://git.unom.io/unom/punktfunk"
license=('MIT OR Apache-2.0')

# Runtime libs the binary links or drives. NVENC + GPU EGL/CUDA come from the NVIDIA driver
# (nvidia-utils) — kept an optdepend, never a hard dep, exactly as the RPM (__requires_exclude
# libcuda) and deb (shlibdeps grep-filter) do: the driver is installed out of band.
depends=(
  'ffmpeg'          # libavcodec/format/util — Arch's ffmpeg ships hevc_nvenc/av1_nvenc
  'pipewire'        # capture + audio transport
  'pipewire-pulse'  # desktop audio bridge
  'wireplumber'     # PipeWire session manager
  'opus'            # GameStream/punktfunk Opus audio
  'libei'           # input injection (RemoteDesktop portal / EIS)
  'mesa'            # libgbm (+ EGL on non-NVIDIA)
  'libglvnd'        # libGL/libEGL loader
  'libxkbcommon'    # virtual keyboard keymap
  'wayland'         # wayland-client (vdisplay backends)
)
optdepends=(
  'nvidia-utils: NVENC hardware encode + GPU EGL/CUDA zero-copy (REQUIRED to encode on NVIDIA)'
  'gamescope: per-session nested compositor backend (no desktop login needed) — needs >=3.16.22'
  'kwin: stream a KDE Plasma desktop (kwin VirtualDisplay backend)'
  'mutter: stream a GNOME desktop (Mutter RecordVirtual backend)'
  'sway: stream a wlroots desktop (Sway VirtualDisplay backend)'
  'xdg-desktop-portal-kde: portal for the headless KDE session helper'
  'xdg-desktop-portal-wlr: portal for the headless Sway session helper'
)
makedepends=('rust' 'cargo' 'clang' 'cmake' 'nasm' 'pkgconf' 'git')

# AUR source (a tagged release). For an in-tree CI build, set PF_SRCDIR to the repo root and
# build() uses it instead; see the README.
source=("git+https://git.unom.io/unom/punktfunk.git#tag=v${pkgver}")
sha256sums=('SKIP')
install="${pkgname}.install"

_repo() { printf '%s' "${PF_SRCDIR:-$srcdir/punktfunk}"; }

build() {
  cd "$(_repo)"
  export RUSTUP_TOOLCHAIN=stable CARGO_TARGET_DIR="$srcdir/target"
  # The zero-copy FFI link-needs libcuda at build time; nvidia-utils provides it on an NVIDIA
  # builder. On a GPU-less builder, symlink the CUDA stub into the link path first (same caveat
  # the RPM documents): ln -s "$(find / -name libcuda.so -path '*stubs*' | head -1)" /usr/lib/
  cargo build --release --locked -p punktfunk-host
}

package() {
  local R; R="$(_repo)"; local T="$srcdir/target/release"

  install -Dm0755 "$T/punktfunk-host"                 "$pkgdir/usr/bin/punktfunk-host"

  # /dev/uinput + /dev/uhid -> input group (virtual gamepads + DualSense UHID)
  install -Dm0644 "$R/scripts/60-punktfunk.rules"     "$pkgdir/usr/lib/udev/rules.d/60-punktfunk.rules"
  # 32 MB UDP socket buffers (send-side headroom at high bitrate)
  install -Dm0644 "$R/scripts/99-punktfunk-net.conf"  "$pkgdir/usr/lib/sysctl.d/99-punktfunk-net.conf"

  # systemd USER units (the host runs in the graphical session, not as root); the source units
  # point at the dev tree — repoint ExecStart at the installed paths (mirrors rpm/deb).
  install -Dm0644 "$R/scripts/punktfunk-host.service" "$pkgdir/usr/lib/systemd/user/punktfunk-host.service"
  sed -i 's#%h/punktfunk/target/release/punktfunk-host#/usr/bin/punktfunk-host#' \
    "$pkgdir/usr/lib/systemd/user/punktfunk-host.service"
  install -Dm0644 "$R/scripts/punktfunk-kde-session.service" "$pkgdir/usr/lib/systemd/user/punktfunk-kde-session.service" 2>/dev/null || true
  [ -f "$pkgdir/usr/lib/systemd/user/punktfunk-kde-session.service" ] && \
    sed -i 's#%h/punktfunk/scripts/headless/run-headless-kde.sh#/usr/share/punktfunk/headless/run-headless-kde.sh#' \
      "$pkgdir/usr/lib/systemd/user/punktfunk-kde-session.service"

  # headless session helpers + env templates + OpenAPI doc
  install -Dm0755 "$R/scripts/headless/run-headless-kde.sh"  "$pkgdir/usr/share/punktfunk/headless/run-headless-kde.sh"
  install -Dm0755 "$R/scripts/headless/run-headless-sway.sh" "$pkgdir/usr/share/punktfunk/headless/run-headless-sway.sh"
  install -Dm0644 "$R/scripts/headless/kde-authorized"       "$pkgdir/usr/share/punktfunk/headless/kde-authorized"
  install -Dm0644 "$R/scripts/headless/punktfunk-sink.conf"  "$pkgdir/usr/share/punktfunk/headless/punktfunk-sink.conf"
  install -Dm0644 "$R/scripts/host.env.example"              "$pkgdir/usr/share/punktfunk/host.env.example"
  install -Dm0644 "$R/packaging/bazzite/host.env"            "$pkgdir/usr/share/punktfunk/host.env.bazzite"
  install -Dm0644 "$R/packaging/kde/host.env"                "$pkgdir/usr/share/punktfunk/host.env.kde"
  install -Dm0644 "$R/docs/api/openapi.json"                 "$pkgdir/usr/share/punktfunk/openapi.json"

  install -Dm0644 "$R/LICENSE-MIT"    "$pkgdir/usr/share/licenses/$pkgname/LICENSE-MIT"
  install -Dm0644 "$R/LICENSE-APACHE" "$pkgdir/usr/share/licenses/$pkgname/LICENSE-APACHE"
  install -Dm0644 "$R/README.md"      "$pkgdir/usr/share/doc/$pkgname/README.md"
}