Moved AppImage files to dedicated folder

Contributes to CURA-9365

packaging/AppImage/AppRun

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+scriptdir=$(dirname $0)
+
+export PYTHONPATH="$scriptdir/lib/python3.10"
+export LD_LIBRARY_PATH=$scriptdir
+export QT_PLUGIN_PATH="$scriptdir/qt/plugins"
+export QML2_IMPORT_PATH="$scriptdir/qt/qml"
+export QT_QPA_FONTDIR=/usr/share/fonts
+export QT_QPA_PLATFORMTHEME=xdgdesktopportal
+export QT_XKB_CONFIG_ROOT=/usr/share/X11/xkb
+
+# Use the openssl.cnf packaged in the AppImage
+export OPENSSL_CONF="$scriptdir/openssl.cnf"
+
+$scriptdir/Ultimaker-Cura "$@"

packaging/AppImage/create_appimage.py

@@ -0,0 +1,75 @@
+# Copyright (c) 2022 Ultimaker B.V.
+# Cura is released under the terms of the LGPLv3 or higher.
+
+import argparse  # Command line arguments parsing and help.
+from jinja2 import Template
+import os  # Finding installation directory.
+import os.path  # Finding files.
+import shutil  # Copying files.
+import stat  # For setting file permissions.
+import subprocess  # For calling system commands.
+
+def build_appimage(dist_path, version):
+    """
+    Creates an AppImage file from the build artefacts created so far.
+    """
+    copy_metadata_files(dist_path, version)
+
+    appimage_filename = f"Ultimaker-Cura_{version}.AppImage"
+    try:
+        os.remove(os.path.join(dist_path, appimage_filename))  # Ensure any old file is removed, if it exists.
+    except FileNotFoundError:
+        pass  # If it didn't exist, that's even better.
+
+    generate_appimage(dist_path, appimage_filename)
+
+    sign_appimage(dist_path, appimage_filename)
+
+def copy_metadata_files(dist_path, version):
+    """
+    Copy metadata files for the metadata of the AppImage.
+    """
+    copied_files = {
+        "cura-icon_256x256.png": "cura-icon.png",
+        "cura.appdata.xml": "cura.appdata.xml",
+        "AppRun": "AppRun"
+    }
+
+    packaging_dir = os.path.dirname(__file__)
+    for source, dest in copied_files.items():
+        print("Copying", os.path.join(packaging_dir, source), "to", os.path.join(dist_path, dest))
+        shutil.copyfile(os.path.join(packaging_dir, source), os.path.join(dist_path, dest))
+
+    # Ensure that AppRun has the proper permissions: 755 (user reads, writes and executes, group reads and executes, world reads and executes).
+    print("Changing permissions for AppRun")
+    os.chmod(os.path.join(dist_path, "AppRun"), stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR | stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH)
+
+    # Provision the Desktop file with the correct version number.
+    template_path = os.path.join(packaging_dir, "cura.desktop.jinja")
+    desktop_path = os.path.join(dist_path, "cura.desktop")
+    print("Provisioning desktop file from", template_path, "to", desktop_path)
+    with open(template_path, "r") as f:
+        desktop_file = Template(f.read())
+    with open(desktop_path, "w") as f:
+        f.write(desktop_file.render(cura_version = version))
+
+def generate_appimage(dist_path, appimage_filename):
+    appimage_path = os.path.join(dist_path, appimage_filename)
+    command = ["appimagetool", "--appimage-extract-and-run", f"{dist_path}/", appimage_path]
+    result = subprocess.call(command)
+    if result != 0:
+        raise RuntimeError(f"The AppImageTool command returned non-zero: {result}")
+
+def sign_appimage(dist_path, appimage_filename):
+    appimage_path = os.path.join(dist_path, appimage_filename)
+    command = ["gpg", "--yes", "--armor", "--detach-sig", appimage_path]
+    result = subprocess.call(command)
+    if result != 0:
+        raise RuntimeError(f"The GPG command returned non-zero: {result}")
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description = "Create AppImages of Cura.")
+    parser.add_argument("dist_path", type=str, help="Path to where PyInstaller installed the distribution of Cura.")
+    parser.add_argument("version", type=str, help="Full version number of Cura (e.g. '5.1.0-beta')")
+    args = parser.parse_args()
+    build_appimage(args.dist_path, args.version)

packaging/AppImage/cura.appdata.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+	<id>com.ultimaker.cura</id>
+	<metadata_license>CC0-1.0</metadata_license>
+	<project_license>LGPL-3.0</project_license>
+	<name>Ultimaker Cura</name>
+	<summary>Slicer to prepare your 3D printing projects</summary>
+	<description>
+		<p>Ultimaker Cura is a slicer, an application that prepares your model for 3D printing. Optimized, expert-tested profiles for 3D printers and materials mean you can start printing reliably in no time. And with industry-standard software integration, you can streamline your workflow for maximum efficiency.</p>
+	</description>
+	<url type="homepage">https://ultimaker.com/en/software/ultimaker-cura</url>
+	<screenshots>
+		<screenshot type="default">
+			<caption>Print preparation screen</caption>
+			<image>https://raw.githubusercontent.com/Ultimaker/Cura/master/screenshot.png</image>
+		</screenshot>
+	</screenshots>
+</component>

packaging/AppImage/cura.desktop.jinja

@@ -0,0 +1,15 @@
+[Desktop Entry]
+Name=Ultimaker Cura
+Name[de]=Ultimaker Cura
+GenericName=3D Printing Software
+GenericName[de]=3D-Druck-Software
+GenericName[nl]=3D-Print Software
+Comment=Cura converts 3D models into paths for a 3D printer. It prepares your print for maximum accuracy, minimum printing time and good reliability with many extra features that make your print come out great.
+Exec=Ultimaker-Cura %F
+Icon=cura-icon
+Terminal=false
+Type=Application
+MimeType=model/stl;application/vnd.ms-3mfdocument;application/prs.wavefront-obj;image/bmp;image/gif;image/jpeg;image/png;text/x-gcode;application/x-amf;application/x-ply;application/x-ctm;model/vnd.collada+xml;model/gltf-binary;model/gltf+json;model/vnd.collada+xml+zip;
+Categories=Graphics;
+Keywords=3D;Printing;
+X-AppImage-Version={{ cura_version }}