Add build script for macos dmgs.

.github/workflows/build-dmg.yml

@@ -0,0 +1,44 @@
+name: Build DMG
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  build-dmg:
+    name: Build (macOS, DMG)
+    runs-on: macos-14
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Qt
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: 6.10.*
+          modules: qtshadertools
+          setup-python: false
+          cache: true
+
+      - name: Build DMG
+        run: |
+          JOBS="$(sysctl -n hw.ncpu)"
+          ./scripts/build-dmg.sh
+
+      - name: Collect artifact
+        run: |
+          mkdir -p release
+          mv ./*.dmg release/
+
+      - name: Attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-path: ./release/*
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: cool-retro-term-dmg
+          path: ./release/*

.gitignore

@@ -54,3 +54,4 @@ build
 
 .DS_Store
 *.app
+*.dmg

scripts/build-dmg.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -euo pipefail
+set -x
+
+REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
+OLD_CWD="$(pwd -P)"
+BUILD_DIR="$REPO_ROOT/build/dmg"
+APP="cool-retro-term.app"
+QML_DIR="$REPO_ROOT/app/qml"
+JOBS="${JOBS:-$(sysctl -n hw.ncpu 2>/dev/null || echo 4)}"
+
+if ! command -v qmake >/dev/null; then
+    echo "qmake not found in PATH." >&2
+    exit 1
+fi
+QT_DIR="${QT_DIR:-$(qmake -query QT_INSTALL_PREFIX)}"
+QT_BIN="${QT_DIR%/}/bin"
+
+mkdir -p "$BUILD_DIR"
+rm -f "$BUILD_DIR/${APP%.app}.dmg"
+pushd "$BUILD_DIR"
+
+"$QT_BIN/qmake" CONFIG+=release "$REPO_ROOT/cool-retro-term.pro"
+make -j"$JOBS"
+
+PLUGIN_DST="$APP/Contents/PlugIns/qmltermwidget"
+rm -rf "$PLUGIN_DST"
+mkdir -p "$APP/Contents/PlugIns"
+cp -R qmltermwidget/QMLTermWidget "$PLUGIN_DST"
+
+export QML_IMPORT_PATH="$PWD/$APP/Contents/PlugIns"
+"$QT_BIN/macdeployqt" "$APP" -qmldir="$QML_DIR" -dmg
+
+rm -f "$APP/Contents/PlugIns/sqldrivers/"libqsql{odbc,psql,mimer}.dylib 2>/dev/null || true
+mv "$BUILD_DIR/${APP%.app}.dmg" "$OLD_CWD/"
+popd