Fix/umbrella chart support (#31)

Co-authored-by: moilanik <niko.moilanen@tietoevry.com>
Reviewed-on: #31

tests/check-version.bats

@@ -153,6 +153,21 @@ teardown() {
   [ "$NEXT_VERSION" = "0.3.2" ]
 }
 
+@test "VERSION_FILE=Chart-umbrella.yaml extracts only top-level version" {
+  mock_set_sequence '[{"code": 200, "body": []}]'
+  mock_start
+
+  export VERSION_FILE="$BATS_TEST_DIRNAME/fixtures/check-version/Chart-umbrella.yaml"
+  run bash scripts/check-version.sh
+
+  echo "STATUS=$status"
+  echo "OUTPUT=$output"
+  [ "$status" -eq 0 ]
+  source /tmp/build-ctx/build.env
+  echo "NEXT_VERSION=$NEXT_VERSION"
+  [ "$NEXT_VERSION" = "0.1.0" ]
+}
+
 @test "no version source exits with error" {
   mock_set_sequence '[{"code": 200, "body": []}]'
   mock_start

tests/fixtures/check-version/Chart-umbrella.yaml

@@ -0,0 +1,12 @@
+apiVersion: v2
+name: agent-platform
+description: Agent Platform umbrella chart
+type: application
+version: 0.1.0
+dependencies:
+  - name: vikunja
+    version: "0.1.0"
+    repository: oci://registry.example.com
+  - name: langfuse
+    version: "0.2.0"
+    repository: oci://registry.example.com