ci: workflow dispatch input to build one target

.github/matrix.yml

@@ -0,0 +1,82 @@
+target:
+  - name: windows-2022-x64
+    runs-on: windows-latest-16-cores
+    package-os: windows-x64
+
+  - name: macos-14-arm64
+    runs-on: macos-14
+    package-os: macos-arm64
+
+  - name: macos-14-x64
+    runs-on: macos-14-large
+    package-os: macos-x64
+
+  - name: debian-13-x86_64
+    runs-on: ubuntu-latest
+    container: debian:trixie-slim
+
+  - name: debian-12-x86_64
+    runs-on: ubuntu-latest
+    container: debian:bookworm-slim
+
+  - name: ubuntu-25.04-x86_64
+    runs-on: ubuntu-latest
+    container: ubuntu:25.04
+
+  - name: ubuntu-24.04-x86_64
+    runs-on: ubuntu-latest
+    container: ubuntu:24.04
+
+  - name: ubuntu-24.04-arm64
+    runs-on: ubuntu-24.04-8-core-arm64
+    container: ubuntu:24.04
+
+  - name: ubuntu-22.04-x86_64
+    runs-on: ubuntu-latest
+    container: ubuntu:22.04
+
+  - name: ubuntu-22.04-arm64
+    runs-on: ubuntu-24.04-8-core-arm64
+    container: ubuntu:22.04
+
+  - name: fedora-42-arm64
+    runs-on: ubuntu-24.04-8-core-arm64
+    container: fedora:42
+
+  - name: fedora-42-x86_64
+    runs-on: ubuntu-latest
+    container: fedora:42
+
+  - name: fedora-41-x86_64
+    runs-on: ubuntu-latest
+    container: fedora:41
+
+  - name: fedora-40-x86_84
+    runs-on: ubuntu-latest
+    container: fedora:40
+
+  - name: opensuse-tumbleweed-x86_64
+    runs-on: ubuntu-latest
+    container: opensuse/tumbleweed:latest
+
+  - name: arch-linux-x86_64
+    runs-on: ubuntu-latest
+    container: archlinux:latest
+
+  - name: manjaro-x86_64
+    runs-on: ubuntu-latest
+    container: manjarolinux/base:latest
+
+  - name: flatpak-x86_64
+    runs-on: ubuntu-latest
+    arch: x86_64
+    container:
+      image: ghcr.io/flathub-infra/flatpak-github-actions:kde-6.8
+      options: --privileged
+
+  - name: flatpak-arm64
+    runs-on: ubuntu-24.04-8-core-arm64
+    arch: aarch64
+    container:
+      image: ghcr.io/flathub-infra/flatpak-github-actions:kde-6.8
+      options: --privileged

.github/workflows/ci.yml

@@ -20,6 +20,10 @@ on:
         description: "Override AWS S3 upload dir"
         required: false
         type: string
+      target:
+        description: "Only build one target (e.g. ubuntu-24.04-x86_64)"
+        required: false
+        type: string
   push:
     branches:
       - master*
@@ -59,8 +63,24 @@ jobs:
     steps:
       - run: echo "✅ CI passed" > $GITHUB_STEP_SUMMARY
 
+  setup-matrix:
+    runs-on: ubuntu-latest
+
+    outputs:
+      matrix: ${{ steps.setup-matrix.outputs.matrix }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup matrix
+        id: setup-matrix
+        uses: symless/actions/setup-matrix@v1
+        with:
+          file: ".github/matrix.yml"
+          target: ${{ inputs.target }}
+
   get-version:
-    if: ${{ !github.event.pull_request.draft }}
     runs-on: ubuntu-latest
 
     outputs:
@@ -78,7 +98,7 @@ jobs:
         uses: ./.github/actions/get-version
 
   main:
-    needs: get-version
+    needs: [get-version, setup-matrix]
     name: main / ${{ matrix.target.name }}
     runs-on: ${{ matrix.target.runs-on }}
     container: ${{ matrix.target.container }}
@@ -89,89 +109,8 @@ jobs:
       # fail due to transient issues unrelated to the build.
       fail-fast: false
 
-      matrix:
-        target:
-          - name: windows-2022-x64
-            runs-on: windows-latest-16-cores
-            package-os: windows-x64
-
-          - name: macos-14-arm64
-            runs-on: macos-14
-            package-os: macos-arm64
-
-          - name: macos-14-x64
-            runs-on: macos-14-large
-            package-os: macos-x64
-
-          - name: debian-13-x86_64
-            runs-on: ubuntu-latest
-            container: debian:trixie-slim
-
-          - name: debian-12-x86_64
-            runs-on: ubuntu-latest
-            container: debian:bookworm-slim
-
-          - name: ubuntu-25.04-x86_64
-            runs-on: ubuntu-latest
-            container: ubuntu:25.04
-
-          - name: ubuntu-24.04-x86_64
-            runs-on: ubuntu-latest
-            container: ubuntu:24.04
-
-          - name: ubuntu-24.04-arm64
-            runs-on: ubuntu-24.04-8-core-arm64
-            container: ubuntu:24.04
-
-          - name: ubuntu-22.04-x86_64
-            runs-on: ubuntu-latest
-            container: ubuntu:22.04
-
-          - name: ubuntu-22.04-arm64
-            runs-on: ubuntu-24.04-8-core-arm64
-            container: ubuntu:22.04
-
-          - name: fedora-42-arm64
-            runs-on: ubuntu-24.04-8-core-arm64
-            container: fedora:42
-
-          - name: fedora-42-x86_64
-            runs-on: ubuntu-latest
-            container: fedora:42
-
-          - name: fedora-41-x86_64
-            runs-on: ubuntu-latest
-            container: fedora:41
-
-          - name: fedora-40-x86_84
-            runs-on: ubuntu-latest
-            container: fedora:40
-
-          - name: opensuse-tumbleweed-x86_64
-            runs-on: ubuntu-latest
-            container: opensuse/tumbleweed:latest
-
-          - name: arch-linux-x86_64
-            runs-on: ubuntu-latest
-            container: archlinux:latest
-
-          - name: manjaro-x86_64
-            runs-on: ubuntu-latest
-            container: manjarolinux/base:latest
-
-          - name: flatpak-x86_64
-            runs-on: ubuntu-latest
-            arch: x86_64
-            container:
-              image: ghcr.io/flathub-infra/flatpak-github-actions:kde-6.8
-              options: --privileged
-
-          - name: flatpak-arm64
-            runs-on: ubuntu-24.04-8-core-arm64
-            arch: aarch64
-            container:
-              image: ghcr.io/flathub-infra/flatpak-github-actions:kde-6.8
-              options: --privileged
+      # Build targets are defined in .github/matrix.yml
+      matrix: ${{ fromJSON(needs.setup-matrix.outputs.matrix) }}
 
     steps:
       - name: Setup variables