fix(test): update dummyDocker mock to handle OCI layout export

Update the dummyDocker mock script to handle 'docker buildx build --output type=oci'
commands by creating a minimal OCI layout tar file.

This fixes the TestBuildDocker_ExportToCache test which was failing because the
mock didn't support the new OCI layout export format introduced in PR #286.

Co-authored-by: Ona <no-reply@ona.com>

Author: leodido

pkg/leeway/build.go

@@ -114,7 +114,7 @@ const (
 var buildProcessVersions = map[PackageType]int{
 	YarnPackage:    7,
 	GoPackage:      2,
-	DockerPackage:  4, // Bumped for OCI layout format change (PR #286)
+	DockerPackage:  4,
 	GenericPackage: 1,
 }
 

pkg/leeway/build_test.go

@@ -18,6 +18,7 @@ func boolPtr(b bool) *bool {
 const dummyDocker = `#!/bin/bash
 
 POSITIONAL_ARGS=()
+OUTPUT=""
 
 while [[ $# -gt 0 ]]; do
   case $1 in
@@ -26,6 +27,15 @@ while [[ $# -gt 0 ]]; do
       shift # past argument
       shift # past value
       ;;
+    --output)
+      # Handle --output type=oci,dest=path
+      OUTPUT_ARG="$2"
+      if [[ "$OUTPUT_ARG" =~ dest=(.+) ]]; then
+        OUTPUT="${BASH_REMATCH[1]}"
+      fi
+      shift # past argument
+      shift # past value
+      ;;
     inspect)
       # Mock docker inspect to return a valid ID
       echo '[{"Id":"sha256:1234567890abcdef"}]'
@@ -40,9 +50,21 @@ done
 
 set -- "${POSITIONAL_ARGS[@]}" # restore positional parameters
 
-if [ "${POSITIONAL_ARGS}" == "save" ]; then
+# Handle docker save
+if [[ " ${POSITIONAL_ARGS[@]} " =~ " save " ]]; then
 	tar cvvfz "${OUTPUT}" -T /dev/null
 fi
+
+# Handle docker buildx build --output type=oci
+if [[ " ${POSITIONAL_ARGS[@]} " =~ " buildx " ]] && [[ " ${POSITIONAL_ARGS[@]} " =~ " build " ]] && [[ -n "${OUTPUT}" ]]; then
+	# Create a minimal OCI layout tar
+	mkdir -p /tmp/oci-layout-$$
+	echo '{"imageLayoutVersion": "1.0.0"}' > /tmp/oci-layout-$$/oci-layout
+	echo '{"schemaVersion": 2, "manifests": []}' > /tmp/oci-layout-$$/index.json
+	mkdir -p /tmp/oci-layout-$$/blobs/sha256
+	tar -cf "${OUTPUT}" -C /tmp/oci-layout-$$ .
+	rm -rf /tmp/oci-layout-$$
+fi
 `
 
 // Create a mock for extractImageWithOCILibs to avoid dependency on actual Docker daemon