Limit manual test runs to a few versions

Author: Wuodan

.github/workflows/build.yaml

@@ -17,6 +17,11 @@ on:
         required: false
         default: ""
         type: string
+      max_versions:
+        description: Maximum number of version tags to build for this manual run
+        required: false
+        default: "1"
+        type: string
 
 env:
   IMAGE_NAME: ${{ inputs.image_name || vars.IMAGE_NAME || 'nikolaik/python-nodejs' }}
@@ -31,8 +36,8 @@ jobs:
     runs-on: ubuntu-latest
     needs: [test]
     outputs:
-      version_matrix: ${{ steps.set-matrix.outputs.matrix }}
-      arch_matrix: ${{ steps.set-matrix.outputs.arch_matrix }}
+      version_matrix: ${{ steps.filter-matrix.outputs.version_matrix }}
+      arch_matrix: ${{ steps.filter-matrix.outputs.arch_matrix }}
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
@@ -45,6 +50,43 @@ jobs:
         run: |
           FORCE=$(if [[ "${{ github.event_name }}" == "workflow_dispatch" && "${{ inputs.force }}" == "true" ]]; then echo "--force"; elif git log --pretty=format:"%s" HEAD^..HEAD | grep -q '\[force\]'; then echo "--force"; else echo ""; fi)
           uv run dpn $FORCE build-matrix --event ${{ github.event_name }}
+      - name: Filter build matrix for manual runs
+        id: filter-matrix
+        run: |
+          version_matrix='${{ steps.set-matrix.outputs.matrix }}'
+          arch_matrix='${{ steps.set-matrix.outputs.arch_matrix }}'
+          max_versions='${{ github.event_name == 'workflow_dispatch' && inputs.max_versions || '0' }}'
+
+          if [[ -z "${version_matrix}" ]]; then
+            echo "version_matrix=" >> "$GITHUB_OUTPUT"
+            echo "arch_matrix=" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          filtered_version_matrix="$(jq -cn \
+            --argjson matrix "${version_matrix}" \
+            --arg max_versions "${max_versions}" '
+              ($matrix.include
+                | if ($max_versions | tonumber) > 0 then .[:($max_versions | tonumber)] else . end
+              ) as $include
+              | if ($include | length) == 0 then empty else {include: $include} end
+            ')"
+
+          if [[ -z "${filtered_version_matrix}" ]]; then
+            echo "version_matrix=" >> "$GITHUB_OUTPUT"
+            echo "arch_matrix=" >> "$GITHUB_OUTPUT"
+            exit 0
+          fi
+
+          filtered_arch_matrix="$(jq -cn \
+            --argjson matrix "${arch_matrix}" \
+            --argjson selected "${filtered_version_matrix}" '
+              ($selected.include | map(.key)) as $keys
+              | {include: ($matrix.include | map(select(.key as $key | $keys | index($key))))}
+            ')"
+
+          echo "version_matrix=${filtered_version_matrix}" >> "$GITHUB_OUTPUT"
+          echo "arch_matrix=${filtered_arch_matrix}" >> "$GITHUB_OUTPUT"
 
 
   build-arch: