Add self-contained release packaging for Linux, macOS, and Windows.

Resolve asset/progress paths for AppImage and .app bundles, and ship GitHub Actions builds on version tags.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/bundle-linux.sh

@@ -0,0 +1,116 @@
+#!/usr/bin/env bash
+# Build a self-contained Linux AppImage (x86_64).
+# Requires: make, pkg-config, GTK4, curl, and fuse/appimagetool (pulled as needed).
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$ROOT"
+
+ARCH="$(uname -m)"
+case "$ARCH" in
+  x86_64|amd64) ARCH=x86_64 ;;
+  aarch64|arm64) ARCH=aarch64 ;;
+  *)
+    echo "Unsupported architecture: $ARCH" >&2
+    exit 1
+    ;;
+esac
+
+OUT_NAME="maturita-linux-${ARCH}.AppImage"
+APPDIR="$ROOT/dist/AppDir"
+TOOLS="$ROOT/dist/tools"
+ICON_DST="assets/icons/hicolor/512x512/apps/maturita.png"
+
+echo "==> Building maturita"
+make -C "$ROOT" clean
+make -C "$ROOT"
+
+echo "==> Preparing AppDir"
+rm -rf "$APPDIR"
+mkdir -p "$APPDIR/usr/bin" \
+         "$APPDIR/usr/share/applications" \
+         "$APPDIR/usr/share/icons/hicolor/512x512/apps" \
+         "$APPDIR/icons/hicolor/512x512/apps" \
+         "$APPDIR/share"
+
+cp -f "$ROOT/maturita" "$APPDIR/usr/bin/maturita"
+cp -f "$ROOT/style.css" "$APPDIR/style.css"
+cp -f "$ROOT/$ICON_DST" "$APPDIR/icons/hicolor/512x512/apps/maturita.png"
+cp -f "$ROOT/$ICON_DST" "$APPDIR/usr/share/icons/hicolor/512x512/apps/maturita.png"
+cp -f "$ROOT/$ICON_DST" "$APPDIR/maturita.png"
+cp -R "$ROOT/share/." "$APPDIR/share/"
+cp -R "$ROOT/share/." "$APPDIR/usr/share/"
+cp -f "$ROOT/share/applications/org.maturita.Maturita.desktop" \
+   "$APPDIR/usr/share/applications/org.maturita.Maturita.desktop"
+# AppImage desktop entry must live at AppDir root and Exec= must be AppRun-compatible.
+cp -f "$ROOT/share/applications/org.maturita.Maturita.desktop" \
+   "$APPDIR/org.maturita.Maturita.desktop"
+# linuxdeploy expects Icon= without path and a matching PNG at AppDir root.
+sed -i.bak 's|^Exec=.*|Exec=maturita|' "$APPDIR/org.maturita.Maturita.desktop"
+sed -i.bak 's|^Icon=.*|Icon=maturita|' "$APPDIR/org.maturita.Maturita.desktop"
+rm -f "$APPDIR/org.maturita.Maturita.desktop.bak"
+
+mkdir -p "$TOOLS"
+LINUXDEPLOY="$TOOLS/linuxdeploy-${ARCH}.AppImage"
+GTK_PLUGIN="$TOOLS/linuxdeploy-plugin-gtk.sh"
+
+if [[ ! -x "$LINUXDEPLOY" ]]; then
+  echo "==> Downloading linuxdeploy"
+  curl -fsSL -o "$LINUXDEPLOY" \
+    "https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-${ARCH}.AppImage"
+  chmod +x "$LINUXDEPLOY"
+fi
+if [[ ! -f "$GTK_PLUGIN" ]]; then
+  echo "==> Downloading linuxdeploy-plugin-gtk"
+  curl -fsSL -o "$GTK_PLUGIN" \
+    "https://raw.githubusercontent.com/linuxdeploy/linuxdeploy-plugin-gtk/master/linuxdeploy-plugin-gtk.sh"
+  chmod +x "$GTK_PLUGIN"
+fi
+
+# Extract linuxdeploy if FUSE is unavailable (common on CI).
+run_linuxdeploy() {
+  if "$LINUXDEPLOY" --appimage-help >/dev/null 2>&1; then
+    "$LINUXDEPLOY" "$@"
+  else
+    local extract_dir="$TOOLS/linuxdeploy-extracted"
+    rm -rf "$extract_dir"
+    cd "$TOOLS"
+    "$LINUXDEPLOY" --appimage-extract >/dev/null
+    mv squashfs-root "$extract_dir"
+    cd "$ROOT"
+    "$extract_dir/AppRun" "$@"
+  fi
+}
+
+echo "==> Bundling GTK libraries into AppDir"
+export LDAI_OUTPUT="$ROOT/dist/$OUT_NAME"
+export LINUXDEPLOY_OUTPUT_VERSION="${VERSION:-continuous}"
+# Place plugin on PATH so linuxdeploy can find it.
+export PATH="$TOOLS:$PATH"
+cp -f "$GTK_PLUGIN" "$TOOLS/linuxdeploy-plugin-gtk.sh"
+
+run_linuxdeploy \
+  --appdir "$APPDIR" \
+  --executable "$APPDIR/usr/bin/maturita" \
+  --desktop-file "$APPDIR/org.maturita.Maturita.desktop" \
+  --icon-file "$APPDIR/maturita.png" \
+  --plugin gtk \
+  --output appimage
+
+# linuxdeploy may write the AppImage into the cwd; normalise the name/location.
+shopt -s nullglob
+for f in "$ROOT"/*.AppImage "$ROOT/dist"/*.AppImage; do
+  case "$(basename "$f")" in
+    linuxdeploy*|appimagetool*) continue ;;
+  esac
+  mv -f "$f" "$ROOT/dist/$OUT_NAME"
+done
+shopt -u nullglob
+
+if [[ ! -f "$ROOT/dist/$OUT_NAME" ]]; then
+  echo "AppImage was not created" >&2
+  exit 1
+fi
+
+chmod +x "$ROOT/dist/$OUT_NAME"
+echo "Created dist/$OUT_NAME"