Adding the platform option without adding a breaking change

govuk-one-login · Apr 17, 2024 · 5930153 · 5930153
1 parent 66b01b7
commit 5930153
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Showing 2 changed files with 11 additions and 2 deletions.
diff --git a/action.yaml b/action.yaml
@@ -32,7 +32,7 @@ inputs:
   docker-platform:
     description: The target architecture for the image build
     required: false
-    default: "linux/amd64"
+    default: ""
   checkout-repo:
     description: Checks out the repo as the first step of the action. Default "true".
     required: false

diff --git a/scripts/build-tag-push-ecr.sh b/scripts/build-tag-push-ecr.sh
@@ -8,9 +8,18 @@ fi
 
 echo "Building image"
 
+PLATFORM_OPTION=""
+
+if [ -n "${DOCKER_PLATFORM}" ]; then
+    echo "Using platform option as --platform ${DOCKER_PLATFORM}"
+    PLATFORM_OPTION="--platform ${DOCKER_PLATFORM}"
+else
+    echo "No platform option supplied, using defaults."
+fi
+
 docker build \
     --tag "$ECR_REGISTRY/$ECR_REPO_NAME:$GITHUB_SHA" \
-    --platform "${DOCKER_PLATFORM}" \
+    $PLATFORM_OPTION \
     --file "$DOCKER_BUILD_PATH"/"$DOCKERFILE" \
     "$DOCKER_BUILD_PATH"