feat: Add snap support (#23)

* WIP: snapcraft config

* chore: tidy up snap workflow

* fix: update ld_library_path

* fix the version of the snap

This uses a combination of most recent git tag and short rev.

* Add git as a build package

Required because we have a dump plugin and a nill plugin which pull in next to nothing. Making it hard to do a version stamp without the git command

.github/workflows/test-snap-builds.yml

@@ -0,0 +1,38 @@
+name: 🧪 Test snap builds on x86_64
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Build snap
+        uses: snapcore/action-build@v1
+        id: snapcraft
+
+      - name: Show log on build failure
+        if: ${{ failure() }}
+        run: |
+          cat /home/runner/.local/state/snapcraft/log/snapcraft*.log
+          exit 1
+
+      - name: Review snap
+        uses: diddlesnaps/snapcraft-review-action@v1
+        with:
+          snap: ${{ steps.snapcraft.outputs.snap }}
+          isClassic: 'false'
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: 'snap'
+          path: ${{ steps.snapcraft.outputs.snap}}

snap/snapcraft.yaml

@@ -0,0 +1,56 @@
+name: stream-sprout
+base: core24
+adopt-info: stream-sprout
+summary: Restream video to multiple destinations
+description: |
+  Restream a video source to multiple destinations such as Twitch, YouTube,
+  and Owncast
+
+grade: stable
+confinement: strict
+
+platforms:
+  amd64:
+    build-on: [ amd64 ]
+    build-for: [ amd64 ]
+  arm64:
+    build-on: [ arm64 ]
+    build-for:  [arm64 ]
+  armhf:
+    build-on: [ armhf ]
+    build-for: [ armhf ]
+
+parts:
+  stream-sprout:
+    after: [ deps ]
+    plugin: dump
+    source: .
+    build-packages:
+      - git
+    override-pull: |
+      craftctl default
+      craftctl set version=$(git describe --tags --abbrev=0).$(git rev-parse --short HEAD)    
+    prime:
+      - stream-sprout
+      - stream-sprout.yaml.example
+      - LICENSE
+      - SECURITY.md
+
+  deps:
+    plugin: nil
+    stage-packages:
+      - ffmpeg
+      - sed
+      - awk
+      - grep
+
+apps:
+  stream-sprout:
+    command: stream-sprout
+    environment:
+      LD_LIBRARY_PATH: $SNAP/usr/lib/$CRAFT_ARCH_BUILD_FOR/pulseaudio:$SNAP/usr/lib/$CRAFT_ARCH_BUILD_FOR/blas:$SNAP/usr/lib/$CRAFT_ARCH_BUILD_FOR/lapack
+    plugs:
+      - home
+      - removable-media
+      - network-bind
+      - network