ci: remove Linux ARM64 builds from release pipeline

Drop QEMU-based cross-compilation that was slow and unreliable.
Only macOS retains ARM64 as a build target.

Author: pythoninthegrass

.github/workflows/release.yml

@@ -147,55 +147,6 @@ jobs:
           gh release upload "${{ github.event.release.tag_name }}" \
             target/x86_64-unknown-linux-gnu/release/bundle/deb/*.deb
 
-  build-linux-arm64:
-    name: Build Linux (ARM64)
-    if: >
-      github.event_name == 'release' ||
-      inputs.platform == 'all' || inputs.platform == 'linux' || inputs.platform == ''
-    runs-on: blacksmith-4vcpu-ubuntu-2404
-    timeout-minutes: 60
-
-    steps:
-      - uses: actions/checkout@v6
-
-      - name: Install Task
-        uses: go-task/setup-task@v1
-
-
-      - name: Setup Blacksmith Builder
-        uses: useblacksmith/setup-docker-builder@v1
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-        with:
-          platforms: arm64
-
-      - name: Build ARM64 .deb
-        run: |
-          docker buildx build \
-            --platform linux/arm64 \
-            --file docker/Dockerfile.linux-arm64 \
-            --build-arg LASTFM_API_KEY=${{ secrets.LASTFM_API_KEY }} \
-            --build-arg LASTFM_API_SECRET=${{ secrets.LASTFM_API_SECRET }} \
-            --target artifacts \
-            --output type=local,dest=dist/linux-arm64 \
-            .
-
-      - name: Upload artifacts
-        uses: actions/upload-artifact@v7
-        with:
-          name: linux-arm64
-          path: dist/linux-arm64/*.deb
-          retention-days: 7
-
-      - name: Upload release assets
-        if: github.event_name == 'release'
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          gh release upload "${{ github.event.release.tag_name }}" \
-            dist/linux-arm64/*.deb
-
   build-windows:
     name: Build Windows (x64)
     if: >
@@ -313,7 +264,7 @@ jobs:
 
   update-readme:
     name: Update README download links
-    needs: [build-macos, build-linux-amd64, build-linux-arm64, build-windows]
+    needs: [build-macos, build-linux-amd64, build-windows]
     if: github.event_name == 'release'
     runs-on: blacksmith-4vcpu-ubuntu-2404
 
@@ -341,7 +292,6 @@ jobs:
           PLATFORM_MAP = [
             ('.dmg',  'macOS',   'Apple Silicon (ARM64)'),
             ('amd64', 'Linux',   'x86_64 (amd64)'),
-            ('arm64', 'Linux',   'ARM64'),
             ('.exe',  'Windows', 'x64'),
           ]
 

docker/Dockerfile.linux-arm64

@@ -8,7 +8,6 @@ Build configuration, performance tuning, signing, and distribution for mt.
 | ---------- | ------------- | -------- | -------- |
 | macOS | ARM64 | Self-hosted `[macOS, ARM64]` | `.app`, `.dmg` |
 | Linux | amd64 | `ubuntu-latest` (CI) or Docker (`Dockerfile.linux-amd64`) | `.deb` |
-| Linux | arm64 | Docker (`Dockerfile.linux-arm64`) | `.deb` |
 | Windows | x64 | Self-hosted `[self-hosted, Windows, X64]` | `.exe` (NSIS) |
 
 ## Taskfile Commands
@@ -28,7 +27,6 @@ All `task tauri:*` commands default to nightly with parallel codegen and sccache
 | `task tauri:icons` | Generate app icons from `static/logo.png` |
 | `task tauri:build:windows` | Build Windows x64 NSIS `.exe` installer |
 | `task tauri:build:linux-amd64` | Build Linux amd64 `.deb` via Docker |
-| `task tauri:build:linux-arm64` | Build Linux arm64 `.deb` via Docker |
 | `task tauri:clean` | Clean all build artifacts |
 | `task tauri:clean:rust` | Clean only Rust build artifacts |
 | `task tauri:doctor` | Run Tauri environment check |
@@ -109,9 +107,6 @@ rustflags = ["-C", "link-arg=-fuse-ld=lld"]
 [target.x86_64-unknown-linux-gnu]
 rustflags = ["-C", "link-arg=-fuse-ld=mold"]
 
-[target.aarch64-unknown-linux-gnu]
-rustflags = ["-C", "link-arg=-fuse-ld=mold"]
-
 [target.x86_64-pc-windows-msvc]
 rustflags = ["-C", "link-arg=-fuse-ld=lld"]
 ```
@@ -404,31 +399,23 @@ task tauri:build
 
 ### Docker Builds (Linux .deb)
 
-Both Linux architectures can be built locally via Docker, which is useful for producing `.deb` packages from a macOS development machine.
+Linux amd64 packages can be built locally via Docker, which is useful for producing `.deb` packages from a macOS development machine.
 
 | Architecture | Task | Dockerfile | Notes |
 | ------------- | ------ | ------------ | ------- |
-| arm64 | `task build:linux-arm64` | `docker/Dockerfile.linux-arm64` | Native on Apple Silicon |
 | amd64 | `task build:linux-amd64` | `docker/Dockerfile.linux-amd64` | QEMU emulation on Apple Silicon |
 
-The arm64 build runs natively on Apple Silicon with no emulation overhead. The amd64 build uses `--platform linux/amd64` which triggers QEMU emulation — functional but slower.
-
-Artifacts are written to `dist/linux-{arm64,amd64}/`.
+Artifacts are written to `dist/linux-amd64/`.
 
 ```bash
 # Build amd64 .deb
 task build:linux-amd64
 
-# Build arm64 .deb
-task build:linux-arm64
-
 # Copy to target machine
 scp dist/linux-amd64/*.deb zima:~/Downloads/
-scp dist/linux-arm64/*.deb rpi:~/Downloads/
 
 # Debug shell (inspect build environment)
 task build:linux-amd64:shell
-task build:linux-arm64:shell
 ```
 
 ### Windows (NSIS)
@@ -599,7 +586,7 @@ sudo apt install libasound2-plugins
 
 ## Runtime Memory Optimization
 
-The app includes several runtime memory optimizations, particularly important on resource-constrained platforms like Raspberry Pi (Linux ARM64).
+The app includes several runtime memory optimizations, particularly important on resource-constrained Linux platforms.
 
 ### Frontend: Summary-Only Section Cache
 

docs/builds.md

@@ -260,8 +260,8 @@ mt/
 
 ## Performance
 
-| Metric | macOS | Linux ARM64 | Notes |
-|--------|-------|-------------|-------|
+| Metric | macOS | Linux | Notes |
+|--------|-------|-------|-------|
 | Cold start | < 500ms | < 1s | |
 | Track switch | < 50ms | < 50ms | |
 | Memory (idle) | ~115 MB | ~480 MB | WebKitGTK multi-process overhead on Linux |

docs/tauri-architecture.md

@@ -84,11 +84,6 @@ tasks:
     cmds:
       - task: tauri:build:x64
 
-  build:linux-arm64:
-    desc: "Build Linux ARM64 .deb via Docker (for Raspberry Pi)"
-    cmds:
-      - task: tauri:build:linux-arm64
-
   build:linux-amd64:
     desc: "Build Linux amd64 .deb via Docker"
     cmds:

taskfile.yml

@@ -268,63 +268,6 @@ tasks:
     preconditions:
       - test -d "{{.APP_PATH}}"
 
-  build:linux-arm64:
-    desc: "Build Linux ARM64 .deb via Docker (for Raspberry Pi)"
-    cmds:
-      - |
-        echo "Building mt for aarch64-unknown-linux-gnu via Docker..."
-        mkdir -p dist/linux-arm64
-
-        docker build \
-          --platform linux/arm64 \
-          -f docker/Dockerfile.linux-arm64 \
-          --build-arg LASTFM_API_KEY=${LASTFM_API_KEY:-} \
-          --build-arg LASTFM_API_SECRET=${LASTFM_API_SECRET:-} \
-          --target artifacts \
-          --output type=local,dest=dist/linux-arm64 \
-          .
-
-        echo ""
-        echo "Build complete. Artifacts:"
-        ls -lh dist/linux-arm64/
-    sources:
-      - "{{.TAURI_DIR}}/src/**/*.rs"
-      - "{{.TAURI_DIR}}/Cargo.toml"
-      - "crates/mt-core/src/**/*.rs"
-      - "crates/mt-core/Cargo.toml"
-      - "zig-core/src/**/*.zig"
-      - "zig-core/build.zig"
-      - "app/frontend/js/**/*.js"
-      - "app/frontend/index.html"
-      - "docker/Dockerfile.linux-arm64"
-    generates:
-      - "dist/linux-arm64/*.deb"
-
-  build:linux-arm64:shell:
-    desc: "Open a shell in the Linux ARM64 build container (debugging)"
-    deps: ["build:linux-arm64:image"]
-    cmds:
-      - |
-        docker run --rm -it \
-          --platform linux/arm64 \
-          mt-builder:linux-arm64 \
-          /bin/bash
-    interactive: true
-
-  build:linux-arm64:image:
-    internal: true
-    desc: "Build the Docker builder image"
-    cmds:
-      - |
-        docker build \
-          --platform linux/arm64 \
-          -f docker/Dockerfile.linux-arm64 \
-          --target builder \
-          -t mt-builder:linux-arm64 \
-          .
-    status:
-      - docker image inspect mt-builder:linux-arm64 >/dev/null 2>&1
-
   build:linux-amd64:
     desc: "Build Linux amd64 .deb via Docker"
     cmds: