ci: Run on ARM runners in addition to x64

Author: nschonni

.github/workflows/build-test.yml

@@ -51,7 +51,7 @@ jobs:
     if: ${{ fromJson(needs.gen-matrix.outputs.matrix) }}
     needs: gen-matrix
     name: build
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     timeout-minutes: 60
     strategy:
       fail-fast: false

genMatrix.js

@@ -69,8 +69,8 @@ const getDockerfileMatrixEntry = (file) => {
 const generateBuildMatrix = (filesAdded, filesModified, filesRenamed) => {
   const dockerfiles = [...new Set(getAffectedDockerfiles(filesAdded, filesModified, filesRenamed))];
 
-  const entries = dockerfiles.map(getDockerfileMatrixEntry);
-
+  let entries = dockerfiles.map(getDockerfileMatrixEntry);
+  entries.os = [ 'ubuntu-24.04', 'ubuntu-24.04-arm' ]
   // Return null if there are no entries so we can skip the matrix step
   return entries.length
     ? { include: entries }