#!/usr/bin/env bash
# Builds OVRAS for the Steam Frame (aarch64) and packages it:
#   dist/AdvancedSettings-<version>-linux-arm64/  (+ .tar.gz)
# The package uses SteamOS's own Qt (no Qt bundled). It contains the program
# folder as OVRAS expects it (binary, libopenvr_api.so, manifests, res/) plus
# install.sh, uninstall.sh, run.sh and README.txt. Adapted from the
# vrdashboard template.
#
#   build_scripts/steamframe/package-release.sh [--no-build]
set -euo pipefail

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(cd "$here/../.." && pwd)"
build=1
for arg in "$@"; do
    case "$arg" in
        --no-build) build=0 ;;
        *) echo "usage: $0 [--no-build]" >&2; exit 2 ;;
    esac
done
# On the Frame itself build natively, elsewhere cross-compile.
if [[ "$(uname -m)" == aarch64 ]]; then mode=native; else mode=cross; fi

(( build )) && "$here/container-build.sh" "$mode"

exe=AdvancedSettings_app
bin="$root/build/steamframe-$mode/Release"
version="$(sed -n 's/^CMAKE_PROJECT_VERSION:[A-Z]*=//p' "$root/build/steamframe-$mode/CMakeCache.txt")"
[[ "$(file -b "$bin/$exe")" == *aarch64* ]] || { echo "$bin/$exe is not an aarch64 build" >&2; exit 1; }

package="AdvancedSettings-$version-linux-arm64"
out="$root/dist/$package"
rm -rf "$out" "$out.tar.gz"
mkdir -p "$out"
cp -a "$bin/." "$out/"

# The scripts start the program from the package folder: OVRAS writes its log
# (AdvancedSettings.log) to the working directory. Process names are cut to
# 15 characters, so running instances are found by command line.
cat > "$out/install.sh" <<EOF
#!/bin/sh
# Installs or updates OVR Advanced Settings: registers it with SteamVR (starts
# automatically with SteamVR from now on) and starts it now. SteamVR must be
# running. Works over SSH.
cd "\$(dirname "\$0")" || exit 1
# An update replaces the files of a running instance: stop it first.
pkill -f "/$exe( |\\\$)" 2>/dev/null && sleep 1
# OVRAS creates its QApplication before handling the manifest options, and
# Qt's default platform plugin (xcb) aborts without a display, e.g. over SSH.
# Registering draws nothing, so use the display-less "offscreen" plugin.
QT_QPA_PLATFORM=offscreen ./$exe --force-install-manifest || exit 1
# Start now. Over SSH there is no display; Qt needs one even for off-screen
# rendering, so use the Frame's (:0).
DISPLAY="\${DISPLAY:-:0}" nohup ./$exe >/dev/null 2>&1 &
echo "Installed and started."
EOF

cat > "$out/uninstall.sh" <<EOF
#!/bin/sh
# Unregisters OVR Advanced Settings from SteamVR and stops it. The folder can
# be deleted afterwards.
cd "\$(dirname "\$0")" || exit 1
pkill -f "/$exe( |\\\$)" 2>/dev/null
# No display needed for unregistering (see install.sh).
exec env QT_QPA_PLATFORM=offscreen ./$exe --force-remove-manifest
EOF

cat > "$out/run.sh" <<EOF
#!/bin/sh
# Restarts OVR Advanced Settings with the given graphics API, for testing.
# Further arguments go to the program:
#   ./run.sh [opengl|vulkan] [options]   (default: opengl)
#   e.g. ./run.sh opengl --snapshot /tmp/ovras.png
cd "\$(dirname "\$0")" || exit 1
api="\${1:-opengl}"
[ \$# -gt 0 ] && shift
pkill -f "/$exe( |\\\$)" 2>/dev/null && sleep 1
DISPLAY="\${DISPLAY:-:0}" nohup ./$exe --graphics-api "\$api" "\$@" >/dev/null 2>&1 &
echo "Started with \$api; log: \$(pwd)/AdvancedSettings.log"
EOF
chmod +x "$out/install.sh" "$out/uninstall.sh" "$out/run.sh"

cat > "$out/README.txt" <<EOF
OVR Advanced Settings $version for the Steam Frame (SteamOS, aarch64)

Uses the system's Qt (SteamOS: Qt 6.8 or newer).

Install / update:  ./install.sh     (SteamVR must be running)
                   SteamVR remembers this folder's location: after moving it,
                   run ./install.sh again.
Uninstall:         ./uninstall.sh
Test a graphics API: ./run.sh opengl | ./run.sh vulkan
Log:               AdvancedSettings.log in the working directory (this folder
                   when started by the scripts)

License: GPL-3.0 (LICENSE); OpenVR: LICENSE-VALVE.
EOF

tar -C "$root/dist" -czf "$out.tar.gz" "$package"
echo "Release folder: $out"
echo "Archive:        $out.tar.gz ($(du -h "$out.tar.gz" | cut -f1))"