flatpak: use a VM to build the package bundle

In order to be able to test the package, we need to build the image
outside of a Docker container. Both snap and flatpak cannot run
correctly inside a Docker container.

So, stop using Gitlab to build the flatpak bundle.

Signed-off-by: Claudio André <[email protected]>

.github/workflows/flatpak-bundle.yml

@@ -0,0 +1,94 @@
+###############################################################################
+#        _       _             _   _            _____  _
+#       | |     | |           | | | |          |  __ \(_)
+#       | | ___ | |__  _ __   | |_| |__   ___  | |__) |_ _ __  _ __   ___ _ __
+#   _   | |/ _ \| '_ \| '_ \  | __| '_ \ / _ \ |  _  /| | '_ \| '_ \ / _ \ '__|
+#  | |__| | (_) | | | | | | | | |_| | | |  __/ | | \ \| | |_) | |_) |  __/ |
+#   \____/ \___/|_| |_|_| |_|  \__|_| |_|\___| |_|  \_\_| .__/| .__/ \___|_|
+#                                                       | |   | |
+#                                                       |_|   |_|
+#
+# Copyright (c) 2024 Claudio André <[email protected]>
+#
+# This program comes with ABSOLUTELY NO WARRANTY; express or implied.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, as expressed in version 2, seen at
+# http://www.gnu.org/licenses/gpl-2.0.html
+###############################################################################
+# GitHub Action to build John the Ripper's flatpak bundle
+# More info at https://github.com/openwall/john-packages
+
+---
+name: Flatpak Bundle
+
+on:
+  workflow_dispatch:
+
+  push:
+    branches:
+      - "flatpak"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: Build bundle
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+        with:
+          disable-sudo: false
+          egress-policy: audit
+
+      - name: Check out the repo
+        uses: actions/checkout@9bb56186c3b09b4f86b1c65136769dd318469633 # v4.1.2
+
+      - name: Get data
+        id: data
+        run: |
+          #TODO: edit before release (JUMBO_RELEASE)
+          {
+            echo "now=$(date -u)"
+            echo "revision=$(git rev-parse --short=7 HEAD 2>/dev/null)"
+            echo "version=1.9.$(date +%Y%m%d)"
+          } >> "$GITHUB_OUTPUT"
+
+      - name: Dependencies
+        run: |
+          sudo apt-get update -yq
+          sudo apt-get install -y flatpak
+          sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+          flatpak install -y --user flathub org.flatpak.Builder
+          flatpak install -y --user flathub org.freedesktop.Platform//23.08 org.freedesktop.Sdk//23.08
+
+      - name: Build
+        run: |
+          wget https://github.com/openwall/john-packages/archive/refs/heads/release.zip -O main.zip #TODO undo Me
+          unzip main.zip
+          cp -r tests/ john-packages-release/deploy/ #TODO undo Me
+
+          # To build the package, go to the place the recipe lives
+          cd john-packages-release/deploy/flatpak
+
+          export DISPLAY=:0.0
+          flatpak-builder --force-clean --sandbox --user --install --install-deps-from=flathub --ccache --mirror-screenshots-url=https://dl.flathub.org/media/ --repo=repo builddir com.openwall.John.json
+          flatpak run com.openwall.John
+
+          ls ../.. -lR
+          sha256sum john.flatpak || true
+
+          flatpak run --command=flatpak-builder-lint org.flatpak.Builder manifest com.openwall.John.json
+          flatpak run --command=flatpak-builder-lint org.flatpak.Builder repo repo
+        shell: bash
+
+      - name: 'Upload Artifact'
+        uses: actions/upload-artifact@v4
+        with:
+          name: bundle
+          path: john.flatpak
+          retention-days: 15