[NOBIN] Added script to build AppImage (Issue #75)

build_appimage.sh

@@ -0,0 +1,97 @@
+#!/bin/bash
+# build_appimage.sh - Package PE-bear as a self-contained Linux AppImage.
+#
+# Usage:
+#   ./build_appimage.sh                 # Qt6 (recommended)
+#   QT_VARIANT=qt5 ./build_appimage.sh  # Qt5 build
+#   VERSION=0.7.2 ./build_appimage.sh   # override version in output name
+#
+# Build it on the OLDEST glibc you want to support (e.g. Ubuntu 20.04):
+# AppImages are forward-compatible with newer glibc, never backward.
+set -euo pipefail
+
+# ---- Config --------------------------------------------------------------
+VERSION="${VERSION:-0.7.2}"
+QT_VARIANT="${QT_VARIANT:-qt6}"        # qt6 (default) | qt5
+ARCH="$(uname -m)"                     # x86_64
+JOBS="$(nproc)"
+BUILD_DIR="build_appimage"
+APPDIR="$PWD/AppDir"
+TOOLS_DIR="$PWD/tools"
+
+LINUXDEPLOY="$TOOLS_DIR/linuxdeploy-${ARCH}.AppImage"
+LINUXDEPLOY_QT="$TOOLS_DIR/linuxdeploy-plugin-qt-${ARCH}.AppImage"
+LD_BASE="https://github.com/linuxdeploy"
+LINUXDEPLOY_URL="$LD_BASE/linuxdeploy/releases/download/continuous/linuxdeploy-${ARCH}.AppImage"
+LINUXDEPLOY_QT_URL="$LD_BASE/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-${ARCH}.AppImage"
+
+# Containers/CI frequently lack FUSE; let the tool AppImages self-extract.
+export APPIMAGE_EXTRACT_AND_RUN=1
+
+fetch() {  # fetch <dest> <url>
+    if command -v wget >/dev/null 2>&1; then wget -q -O "$1" "$2"
+    else curl -fsSL -o "$1" "$2"; fi
+}
+
+# ---- 1. Configure & build ------------------------------------------------
+CMAKE_QT_FLAGS=()
+[ "$QT_VARIANT" = "qt5" ] && CMAKE_QT_FLAGS+=(-DUSE_QT5=ON)
+
+echo "==> Configuring ($QT_VARIANT)"
+cmake -S . -B "$BUILD_DIR" \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DCMAKE_INSTALL_PREFIX=/usr \
+    "${CMAKE_QT_FLAGS[@]}"
+
+echo "==> Building with $JOBS jobs"
+cmake --build "$BUILD_DIR" --parallel "$JOBS"
+
+# ---- 2. Install into a clean AppDir --------------------------------------
+echo "==> Installing into AppDir"
+rm -rf "$APPDIR"
+DESTDIR="$APPDIR" cmake --install "$BUILD_DIR"
+
+# ---- 3. Fetch linuxdeploy + Qt plugin (cached in ./tools) ----------------
+mkdir -p "$TOOLS_DIR"
+[ -x "$LINUXDEPLOY" ]    || { echo "==> Downloading linuxdeploy";        fetch "$LINUXDEPLOY"    "$LINUXDEPLOY_URL";    chmod +x "$LINUXDEPLOY"; }
+[ -x "$LINUXDEPLOY_QT" ] || { echo "==> Downloading linuxdeploy-plugin-qt"; fetch "$LINUXDEPLOY_QT" "$LINUXDEPLOY_QT_URL"; chmod +x "$LINUXDEPLOY_QT"; }
+
+# linuxdeploy discovers plugins named linuxdeploy-plugin-<name>* on PATH.
+export PATH="$TOOLS_DIR:$PATH"
+
+# Point the Qt plugin at the right qmake when several Qt versions coexist.
+if [ "$QT_VARIANT" = "qt6" ]; then
+    export QMAKE="${QMAKE:-$(command -v qmake6 || true)}"
+else
+    export QMAKE="${QMAKE:-$(command -v qmake || true)}"
+fi
+
+# ---- 4. Normalize the icon to a valid hicolor size -----------------------
+# linuxdeploy rejects icons that aren't a standard resolution (8..512). The
+# source pixmap is oversized, so emit a 256x256 copy in the spec-correct path.
+ICON_SRC="$APPDIR/usr/share/pixmaps/net.hasherezade.pe-bear.png"
+ICON_DEPLOY="$ICON_SRC"
+if command -v magick >/dev/null 2>&1 || command -v convert >/dev/null 2>&1; then
+    IM="$(command -v magick || command -v convert)"
+    ICON_256="$APPDIR/usr/share/icons/hicolor/256x256/apps/net.hasherezade.pe-bear.png"
+    mkdir -p "$(dirname "$ICON_256")"
+    "$IM" "$ICON_SRC" -resize 256x256 "$ICON_256"
+    ICON_DEPLOY="$ICON_256"
+else
+    echo "WARNING: ImageMagick not found; passing the source icon as-is."
+    echo "         Install imagemagick, or resize the icon to 256x256 manually."
+fi
+
+# ---- 5. Bundle & produce the AppImage ------------------------------------
+echo "==> Bundling dependencies & producing AppImage"
+export OUTPUT="PE-bear_${VERSION}_${QT_VARIANT}_${ARCH}_linux.AppImage"
+
+"$LINUXDEPLOY" \
+    --appdir "$APPDIR" \
+    --plugin qt \
+    --executable "$APPDIR/usr/bin/PE-bear" \
+    --desktop-file "$APPDIR/usr/share/applications/net.hasherezade.pe-bear.desktop" \
+    --icon-file "$ICON_DEPLOY" \
+    --output appimage
+
+echo "==> Done: $OUTPUT"