Add flatpak bundle build

.github/workflows/build-flatpak.yml

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+name: 'Build Inochi Session (Flatpak)'
+
+on:
+  workflow_call:
+    flatpak_branch:
+      required: true
+      type: string
+
+
+jobs:
+  build-flatpak:
+    runs-on: ubuntu-latest
+    container:
+      image: bilelmoussaoui/flatpak-github-actions:freedesktop-22.08
+      options: --privileged
+
+    env:
+      MANIFEST_PATH: build-aux/linux/flatpak/com.inochi2d.inochi-session.yml
+      FLATPAK_BRANCH: ${{ inputs.flatpak_branch }}
+      FLATPAK_BUILD_DIR: build-dir
+      FLATPAK_BUILD_REPO: build-repo
+
+    steps:
+    - uses: actions/[email protected]
+      with:
+        submodules: true
+
+    - name: Dump canonical manifest
+      run: |
+        set -e
+        flatpak-builder --show-manifest ${MANIFEST_PATH} > canonical-manifest.json
+
+    - name: Download flatpak SDK and sources
+      run: |
+        set -e
+        flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
+        flatpak-builder --default-branch=${FLATPAK_BRANCH} --install-deps-from=flathub --install-deps-only --user /dev/null ${MANIFEST_PATH}
+        flatpak-builder --default-branch=${FLATPAK_BRANCH} --download-only /dev/null ${MANIFEST_PATH}
+
+    - name: Prime cache
+      uses: actions/cache@v3
+      with:
+        path: |
+          .flatpak-builder/ccache
+        key: flatpak-builder-${{ hashFiles('canonical-manifest.json') }}
+        restore-keys: |
+          flatpak-builder-
+
+    - name: Build flatpak
+      run: |
+        set -e
+        flatpak-builder --default-branch=${FLATPAK_BRANCH} --ccache --repo=${FLATPAK_BUILD_REPO} ${FLATPAK_BUILD_DIR} ${MANIFEST_PATH}
+
+    - name: Upload flatpak repo
+      uses: actions/upload-artifact@v4
+      with:
+        name: ${{ env.FLATPAK_BUILD_REPO }}
+        path: |
+          ${{ env.FLATPAK_BUILD_REPO }}
+          !${{ env.FLATPAK_BUILD_REPO }}/.lock
+
+  build-flatpak-bundle:
+    needs: build-flatpak
+    runs-on: ubuntu-latest
+
+    env:
+      APP_ID: com.inochi2d.inochi-session
+      FLATPAK_BUNDLE: inochi-session
+      FLATPAK_BRANCH: ${{ inputs.flatpak_branch }}
+      FLATPAK_BUILD_REPO: build-repo
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install flatpak
+      run: |
+        set -e
+        sudo apt install -y flatpak
+
+    - name: Download flatpak repo
+      uses: actions/download-artifact@v4
+      with:
+        name: ${{ env.FLATPAK_BUILD_REPO }}
+
+    - name: Create flatpak bundle
+      run: |
+        set -e
+        mkdir -p ${FLATPAK_BUILD_REPO}/{extensions,refs/{mirrors,remotes},state,tmp/cache}
+        flatpak build-bundle --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo ${FLATPAK_BUILD_REPO} ${FLATPAK_BUNDLE}.flatpak ${APP_ID} ${FLATPAK_BRANCH}
+
+    - name: Upload flatpak bundle
+      uses: actions/upload-artifact@v4
+      with:
+        name: "build-flatpak"
+        path: ${{ env.FLATPAK_BUNDLE }}.flatpak

build-aux/linux/flatpak/com.inochi2d.inochi-session.yml

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+id: com.inochi2d.inochi-session
+runtime: org.freedesktop.Platform
+runtime-version: '24.08'
+sdk: org.freedesktop.Sdk
+sdk-extensions:
+  - org.freedesktop.Sdk.Extension.ldc
+  - org.freedesktop.Sdk.Extension.llvm18
+command: inochi-session
+finish-args:
+  - --device=all          # OpenGL rendering, webcams (may be required? not sure)
+  - --socket=fallback-x11
+  - --share=ipc
+  - --share=network       # Needed to communicate with external trackers
+  - --socket=wayland
+  - --filesystem=host     # This is a dev tool, it should probably have as much access to the host as it can. Also needs it for "Recent Files"
+
+modules:
+
+  # --- Inochi Session ---
+  - name: Inochi-Session
+    buildsystem: simple
+    build-options:
+      build-args:
+        - "--share=network"
+
+      append-path: /usr/lib/sdk/ldc/bin
+      prepend-path: /usr/lib/sdk/llvm18/bin
+      prepend-ld-library-path: /usr/lib/sdk/llvm18/lib
+      env:
+        DFLAGS: '-g --d-debug'
+    build-commands:
+      - chmod +x ./gentl.sh; ./gentl.sh
+      - git clone https://github.com/Inochi2D/i2d-imgui.git --recurse-submodules;
+        git clone https://github.com/Inochi2D/dcv-i2d;
+        dub add-local i2d-imgui/ "0.8.0";
+        dub add-local dcv-i2d/ "0.3.0";
+        dub build --config=update-version;
+        dub build --config=meta;
+        dub build --config=linux-nightly --debug=InExperimental
+      - install -Dm 755 ./out/inochi-session /app/bin/inochi-session
+      - install -Dm 755 ./out/cimgui.so /app/bin/cimgui.so
+      # Uncomment when session translations are actually a thing. 
+      #- install -Dm644 ./out/*.mo /app/bin
+
+    sources:
+      - type: dir
+        path: ../../.. # The root of the Inochi Session repo
+
+  - name: Metadata
+    buildsystem: simple
+    build-commands:
+
+      - install -Dm644 com.inochi2d.inochi-session.metainfo.xml /app/share/metainfo/com.inochi2d.inochi-session.metainfo.xml
+      - install -Dm644 ./session/icon_128.png /app/share/icons/hicolor/128x128/apps/com.inochi2d.inochi-session.png
+      - install -Dm644 ./session/icon_256.png /app/share/icons/hicolor/256x256/apps/com.inochi2d.inochi-session.png
+      - install -Dm644 ./session/icon_512.png /app/share/icons/hicolor/512x512/apps/com.inochi2d.inochi-session.png
+      - install -Dm644 inochi-session.desktop /app/share/applications/com.inochi2d.inochi-session.desktop
+
+    sources:
+      - type: git
+        url: https://github.com/Inochi2D/branding.git
+        commit: 7caad43eb2b6d423275a3d972ac1e7ee36da2850
+
+      - type: dir
+        path: ./nightly/

build-aux/linux/flatpak/extras/flatpak-remote/LICENSE

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+Copyright (c) 2021 TheEvilSkeleton
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

build-aux/linux/flatpak/nightly/com.inochi2d.inochi-session.metainfo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+  <id>com.inochi2d.inochi-session</id>
+  <name>Inochi Session</name>
+  <summary>Stream with Inochi2D puppets</summary>
+  <developer id="com.inochi2d">
+    <name>Luna the Foxgirl</name>
+  </developer>
+  <launchable type="desktop-id">com.inochi2d.inochi-session.desktop</launchable>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>BSD-2-Clause</project_license>
+  <description>
+    <p>Inochi2D is a framework for realtime 2D puppet animation which can be used for VTubing, 
+      game development and digital animation.</p>
+    <p>Inochi Session is a tool that lets you use your Inochi2D models for live streaming.</p>
+  </description>
+  <screenshots>
+    <screenshot type="default">
+      <caption>Title screen</caption>
+      <image type="source">https://user-images.githubusercontent.com/7032834/181119161-f83e8e57-2f9e-409f-90bd-1b1b9c047bcc.png</image>
+    </screenshot>
+  </screenshots>
+  <releases>
+    <release version="nightly">
+      <url>https://github.com/Inochi2D/inochi-session/</url>
+      <description>
+         <p>This is a nightly build of Inochi Session!</p>
+         <p>Inochi Session may crash unexpectedly and you will likely encounter bugs.</p>
+         <p>Make sure to save and back up your work often!</p>
+      </description>
+    </release>
+  </releases>
+  <url type="homepage">https://lunafoxgirlvt.itch.io/inochi-session</url>
+  <url type="bugtracker">https://github.com/Inochi2D/inochi-session/issues</url>
+  <url type="help">https://docs.inochi2d.com</url>
+  <url type="donation">https://inochi2d.com/#donate</url>
+  <url type="vcs-browser">https://github.com/Inochi2D/inochi-session</url>
+  <url type="contribute">https://github.com/Inochi2D/inochi-session</url>
+  <categories>
+    <category>Graphics</category>
+  </categories>
+  <recommends>
+    <control>pointing</control>
+    <control>keyboard</control>
+  </recommends>
+  <branding>
+    <color type="primary" scheme_preference="light">#dbdbdb</color>
+    <color type="primary" scheme_preference="dark">#242424</color>
+  </branding>
+  <content_rating type="oars-1.1"/>
+</component>

build-aux/linux/flatpak/nightly/inochi-session.desktop

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+[Desktop Entry]
+Name=Inochi Session (Nightly)
+Exec=inochi-session
+Icon=com.inochi2d.inochi-session
+Type=Application
+Categories=Utility

build-aux/linux/flatpak/release/com.inochi2d.inochi-session.metainfo.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop">
+  <id>com.inochi2d.inochi-session</id>
+  <name>Inochi Session</name>
+  <summary>Stream with Inochi2D puppets</summary>
+  <developer id="com.inochi2d">
+    <name>Luna the Foxgirl</name>
+  </developer>
+  <launchable type="desktop-id">com.inochi2d.inochi-session.desktop</launchable>
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>BSD-2-Clause</project_license>
+  <description>
+    <p>Inochi2D is a framework for realtime 2D puppet animation which can be used for VTubing, 
+      game development and digital animation.</p>
+    <p>Inochi Session is a tool that lets you use your Inochi2D models for live streaming.</p>
+  </description>
+  <screenshots>
+    <screenshot type="default">
+      <caption>Title screen</caption>
+      <image type="source">https://user-images.githubusercontent.com/7032834/181119161-f83e8e57-2f9e-409f-90bd-1b1b9c047bcc.png</image>
+    </screenshot>
+  </screenshots>
+  <releases>
+    <release version="stable"/>
+  </releases>
+  <url type="homepage">https://lunafoxgirlvt.itch.io/inochi-session</url>
+  <url type="bugtracker">https://github.com/Inochi2D/inochi-session/issues</url>
+  <url type="help">https://docs.inochi2d.com</url>
+  <url type="donation">https://inochi2d.com/#donate</url>
+  <url type="vcs-browser">https://github.com/Inochi2D/inochi-session</url>
+  <url type="contribute">https://github.com/Inochi2D/inochi-session</url>
+  <categories>
+    <category>Graphics</category>
+  </categories>
+  <recommends>
+    <control>pointing</control>
+    <control>keyboard</control>
+  </recommends>
+  <branding>
+    <color type="primary" scheme_preference="light">#dbdbdb</color>
+    <color type="primary" scheme_preference="dark">#242424</color>
+  </branding>
+  <content_rating type="oars-1.1"/>
+</component>

build-aux/linux/flatpak/release/inochi-session.desktop

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+[Desktop Entry]
+Name=Inochi Session
+Exec=inochi-session
+Icon=com.inochi2d.inochi-session
+Type=Application
+Categories=Utility