build flatpak on CI

.github/workflows/linux-flatpak.yml

@@ -0,0 +1,125 @@
+name: Build flatpak
+
+on:
+  release:
+    types: [published]
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Release tag'
+        required: false
+
+jobs:
+  get-version:
+    uses: ./.github/workflows/get-version.yml
+    with:
+      version: ${{ inputs.tag }}
+
+  flatpak:
+    name: "Build flatpak"
+    needs: [get-version]
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/flathub-infra/flatpak-github-actions:gnome-48
+      options: --privileged
+    strategy:
+      matrix:
+        variant:
+          - arch: x86_64
+            runner: ubuntu-24.04
+          - arch: aarch64
+            runner: ubuntu-24.04-arm
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          path: cryptomator
+      - name: Get SHA of HEAD commit
+        id: git-head-sha
+        run: echo "head-sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+      - name: Transform build template into build script
+        run: envsubst '$FLATPAK_VERSION $FLATPAK_REVISION $CRYPTOMATOR_SOURCE' < cryptomator/dist/linux/flatpak/org.cryptomator.Cryptomator.TEMPLATE.yaml > org.cryptomator.Cryptomator.yaml
+        env:
+          FLATPAK_VERSION: ${{ needs.get-version.outputs.semVerNum }}
+          FLATPAK_REVISION: 1
+          CRYPTOMATOR SOURCE: |-
+            type: git
+                    path: cryptomator
+                    commit: ${{ steps.git-head-sha.outputs.head-sha }}
+      - uses: flatpak/flatpak-github-actions/flatpak-builder@92ae9851ad316786193b1fd3f40c4b51eb5cb101 # v6.6
+        with:
+          bundle: cryptomator.flatpak
+          manifest-path: org.cryptomator.Cryptomator.yaml
+          cache-key: flatpak-builder-${{ github.sha }}
+          #build-dir: flatpak_app
+          #gpg-sign:
+          arch: ${{ matrix.variant.arch }}
+
+  tarball:
+    name: Determines tarball url and compute checksum
+    runs-on: ubuntu-latest
+    needs: [get-version]
+    if:  github.event_name == 'workflow_dispatch' || needs.get-version.outputs.versionType == 'stable'
+    outputs:
+      url: ${{ steps.url.outputs.url}}
+      sha512: ${{ steps.sha512.outputs.sha512}}
+    steps:
+      - name: Determine tarball url
+        id: url
+        run: |
+          URL="https://github.com/cryptomator/cryptomator/archive/refs/tags/${TAG}.tar.gz"
+          echo "url=${URL}" >> "$GITHUB_OUTPUT"
+        env:
+          TAG: ${{ inputs.tag || github.event.release.tag_name}}
+      - name: Download source tarball and compute checksum
+        id: sha512
+        run: |
+          curl --silent --fail-with-body --proto "=https" -L -H "Accept: application/vnd.github+json" ${{ steps.url.outputs.url }} --output cryptomator.tar.gz
+          TARBALL_SHA512=$(sha512sum cryptomator.tar.gz | cut -d ' ' -f1)
+          echo "sha512=${TARBALL_SHA512}" >> "$GITHUB_OUTPUT"
+  flathub:
+    name: Create PR for flathub
+    runs-on: ubuntu-latest
+    needs: [tarball, get-version]
+    env:
+      FLATHUB_PR_URL: tbd
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          repository: 'flathub/org.cryptomator.Cryptomator'
+          token: ${{ secrets.CRYPTOBOT_PR_TOKEN }}
+      - name: Checkout release branch
+        run: |
+          git checkout -b release/${{ needs.get-version.outputs.semVerStr }}
+      - name: Update build file
+        run: |
+          sed -i -e 's/VERSION: [0-9]\+\.[0-9]\+\.[0-9]\+.*/VERSION: ${{ needs.get-version.outputs.semVerStr }}/g' org.cryptomator.Cryptomator.yaml
+          sed -i -e 's/sha512: [0-9A-Za-z_\+-]\{128\} #CRYPTOMATOR/sha512: ${{ needs.tarball.outputs.sha512 }} #CRYPTOMATOR/g' org.cryptomator.Cryptomator.yaml
+          sed -i -e 's;url: https://github.com/cryptomator/cryptomator/archive/refs/tags/[^[:blank:]]\+;url: ${{ needs.tarball.outputs.url }};g' org.cryptomator.Cryptomator.yaml
+      - name: Commit and push
+        run: |
+          git config user.name "${{ github.actor }}"
+          git config user.email "${{ github.actor_id }}+${{ github.actor }}@users.noreply.github.com"
+          git config push.autoSetupRemote true
+          git stage .
+          git commit -m "Prepare release ${{needs.get-version.outputs.semVerStr}}"
+          git push
+      - name: Create pull request
+        run: |
+          printf "> [!IMPORTANT]\n> Todos:\n> - [ ] Update maven dependencies\n> - [ ] Check for JDK update\n> - [ ] Check for JFX update" > pr_body.md
+          PR_URL=$(gh pr create --title "Release ${{ needs.get-version.outputs.semVerStr }}" --body-file pr_body.md)
+          echo "FLATHUB_PR_URL=$PR_URL" >> "$GITHUB_ENV"
+        env:
+          GH_TOKEN: ${{ secrets.CRYPTOBOT_PR_TOKEN }}
+      - name: Slack Notification
+        uses: rtCamp/action-slack-notify@e31e87e03dd19038e411e38ae27cbad084a90661 # v2.3.3
+        if: github.event_name == 'release'
+        env:
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_URL }}
+          SLACK_USERNAME: 'Cryptobot'
+          SLACK_ICON: false
+          SLACK_ICON_EMOJI: ':bot:'
+          SLACK_CHANNEL: 'cryptomator-desktop'
+          SLACK_TITLE: "Flathub release PR created for ${{ github.event.repository.name }} ${{ github.event.release.tag_name }} created."
+          SLACK_MESSAGE: "See <${{ env.FLATHUB_PR_URL }}|PR> on how to proceed.>."
+          SLACK_FOOTER: false
+          MSG_MINIMAL: true