Enable pipeline packages with multiple files (#939)

* Enable pipeline packages with multiple files

* Added tests

* Initialize the variables to nil

* Trying to read the archive file entry immediately

* Fixed the pipeline packages used by the `TestPipelineAPI` test.
Also added a failing test case. Will disable it in next commit.

* Disabling the test for the UploadFile bug I've discovered

* Fixed the pipeline name.

* Removed the disabled extra test.

* Addressed the feedback.

* Removed the "header == nil" check (feedback).

* Fixed typo

* Addressed the PR feedback
Added space before comment.
Checking for the error again.

Author: Ark-kun

backend/src/apiserver/server/test/arguments_tarball/arguments.tar.gz

@@ -0,0 +1,9 @@
+name: whalesay
+inputs:
+- name: param1
+- name: param2
+implementation:
+  container:
+    image: docker/whalesay:latest
+    command: [cowsay]
+    args: [{inputValue: param1}, {inputValue: param2}]

backend/src/apiserver/server/test/arguments_zip/arguments-parameters.zip

@@ -0,0 +1,36 @@
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: argoproj.io/v1alpha1
+kind: Workflow
+metadata:
+  generateName: arguments-parameters-
+spec:
+  entrypoint: whalesay
+  arguments:
+    parameters:
+    - name: param1
+      value: hello
+    - name: param2
+
+  templates:
+  - name: whalesay
+    inputs:
+      parameters:
+      - name: param1
+      - name: param2
+    container:
+      image: docker/whalesay:latest
+      command: [cowsay]
+      args: ["{{inputs.parameters.param1}}-{{inputs.parameters.param2}}"]

backend/src/apiserver/server/test/pipeline_plus_component/component.yaml

@@ -62,6 +62,10 @@ func isYamlFile(fileName string) bool {
 	return strings.HasSuffix(fileName, ".yaml") || strings.HasSuffix(fileName, ".yml")
 }
 
+func isPipelineYamlFile(fileName string) bool {
+	return fileName == "pipeline.yaml"
+}
+
 func isZipFile(compressedFile []byte) bool {
 	return len(compressedFile) > 2 && compressedFile[0] == '\x50' && compressedFile[1] == '\x4B' //Signature of zip file is "PK"
 }
@@ -75,13 +79,38 @@ func DecompressPipelineTarball(compressedFile []byte) ([]byte, error) {
 	if err != nil {
 		return nil, util.NewInvalidInputErrorWithDetails(err, "Error extracting pipeline from the tarball file. Not a valid tarball file.")
 	}
+	// New behavior: searching for the "pipeline.yaml" file.
 	tarReader := tar.NewReader(gzipReader)
+	for {
+		header, err := tarReader.Next()
+		if err == io.EOF {
+			tarReader = nil
+			break
+		}
+		if err != nil {
+			return nil, util.NewInvalidInputErrorWithDetails(err, "Error extracting pipeline from the tarball file. Not a valid tarball file.")
+		}
+		if isPipelineYamlFile(header.Name) {
+			//Found the pipeline file.
+			break
+		}
+	}
+	// Old behavior - taking the first file in the archive
+	if tarReader == nil {
+		// Resetting the reader
+		gzipReader, err = gzip.NewReader(bytes.NewReader(compressedFile))
+		if err != nil {
+			return nil, util.NewInvalidInputErrorWithDetails(err, "Error extracting pipeline from the tarball file. Not a valid tarball file.")
+		}
+		tarReader = tar.NewReader(gzipReader)
+	}
+
 	header, err := tarReader.Next()
-	if err != nil || header == nil {
+	if err != nil {
 		return nil, util.NewInvalidInputErrorWithDetails(err, "Error extracting pipeline from the tarball file. Not a valid tarball file.")
 	}
 	if !isYamlFile(header.Name) {
-		return nil, util.NewInvalidInputError("Error extracting pipeline from the tarball file. Expecting a YAML file inside the tarball. Got: %v", header.Name)
+		return nil, util.NewInvalidInputError("Error extracting pipeline from the tarball file. Expecting a pipeline.yaml file inside the tarball. Got: %v", header.Name)
 	}
 	decompressedFile, err := ioutil.ReadAll(tarReader)
 	if err != nil {
@@ -98,10 +127,21 @@ func DecompressPipelineZip(compressedFile []byte) ([]byte, error) {
 	if len(reader.File) < 1 {
 		return nil, util.NewInvalidInputErrorWithDetails(err, "Error extracting pipeline from the zip file. Empty zip file.")
 	}
-	if !isYamlFile(reader.File[0].Name) {
-		return nil, util.NewInvalidInputError("Error extracting pipeline from the zip file. Expecting a YAML file inside the zip. Got: %v", reader.File[0].Name)
+
+	// Old behavior - taking the first file in the archive
+	pipelineYamlFile := reader.File[0]
+	// New behavior: searching for the "pipeline.yaml" file.
+	for _, file := range reader.File {
+		if isPipelineYamlFile(file.Name) {
+			pipelineYamlFile = file
+			break
+		}
+	}
+
+	if !isYamlFile(pipelineYamlFile.Name) {
+		return nil, util.NewInvalidInputError("Error extracting pipeline from the zip file. Expecting a pipeline.yaml file inside the zip. Got: %v", pipelineYamlFile.Name)
 	}
-	rc, err := reader.File[0].Open()
+	rc, err := pipelineYamlFile.Open()
 	if err != nil {
 		return nil, util.NewInvalidInputErrorWithDetails(err, "Error extracting pipeline from the zip file. Failed to read the content.")
 	}

backend/src/apiserver/server/test/pipeline_plus_component/pipeline.yaml

@@ -148,6 +148,15 @@ func TestReadPipelineFile_Zip_AnyExtension(t *testing.T) {
 	assert.Equal(t, expectedPipelineFile, pipelineFile)
 }
 
+func TestReadPipelineFile_MultifileZip(t *testing.T) {
+	file, _ := os.Open("test/pipeline_plus_component/pipeline_plus_component.zip")
+	pipelineFile, err := ReadPipelineFile("pipeline_plus_component.ai-hub-package", file, MaxFileLength)
+	assert.Nil(t, err)
+
+	expectedPipelineFile, _ := ioutil.ReadFile("test/pipeline_plus_component/pipeline.yaml")
+	assert.Equal(t, expectedPipelineFile, pipelineFile)
+}
+
 func TestReadPipelineFile_Tarball(t *testing.T) {
 	file, _ := os.Open("test/arguments_tarball/arguments.tar.gz")
 	pipelineFile, err := ReadPipelineFile("arguments.tar.gz", file, MaxFileLength)
@@ -166,6 +175,15 @@ func TestReadPipelineFile_Tarball_AnyExtension(t *testing.T) {
 	assert.Equal(t, expectedPipelineFile, pipelineFile)
 }
 
+func TestReadPipelineFile_MultifileTarball(t *testing.T) {
+	file, _ := os.Open("test/pipeline_plus_component/pipeline_plus_component.tar.gz")
+	pipelineFile, err := ReadPipelineFile("pipeline_plus_component.ai-hub-package", file, MaxFileLength)
+	assert.Nil(t, err)
+
+	expectedPipelineFile, _ := ioutil.ReadFile("test/pipeline_plus_component/pipeline.yaml")
+	assert.Equal(t, expectedPipelineFile, pipelineFile)
+}
+
 func TestReadPipelineFile_UnknownFileFormat(t *testing.T) {
 	file, _ := os.Open("test/unknown_format.foo")
 	_, err := ReadPipelineFile("unknown_format.foo", file, MaxFileLength)

backend/src/apiserver/server/test/pipeline_plus_component/pipeline_plus_component.tar.gz

@@ -80,17 +80,17 @@ func (s *PipelineApiTest) TestPipelineAPI() {
 	/* ---------- Upload pipelines zip ---------- */
 	time.Sleep(1 * time.Second)
 	argumentUploadPipeline, err := s.pipelineUploadClient.UploadFile(
-		"../resources/zip-arguments.zip", &uploadParams.UploadPipelineParams{Name: util.StringPointer("zip-arguments-parameters")})
+		"../resources/arguments.pipeline.zip", &uploadParams.UploadPipelineParams{Name: util.StringPointer("zip-arguments-parameters")})
 	assert.Nil(t, err)
 	assert.Equal(t, "zip-arguments-parameters", argumentUploadPipeline.Name)
 
 	/* ---------- Import pipeline tarball by URL ---------- */
 	time.Sleep(1 * time.Second)
 	argumentUrlPipeline, err := s.pipelineClient.Create(&params.CreatePipelineParams{
 		Body: &pipeline_model.APIPipeline{URL: &pipeline_model.APIURL{
-			PipelineURL: "https://storage.googleapis.com/ml-pipeline-dataset/arguments.zip"}}})
+			PipelineURL: "https://storage.googleapis.com/ml-pipeline-dataset/arguments.pipeline.zip"}}})
 	assert.Nil(t, err)
-	assert.Equal(t, "arguments.zip", argumentUrlPipeline.Name)
+	assert.Equal(t, "arguments.pipeline.zip", argumentUrlPipeline.Name)
 
 	/* ---------- Verify list pipeline works ---------- */
 	pipelines, totalSize, _, err := s.pipelineClient.List(params.NewListPipelinesParams())
@@ -111,7 +111,7 @@ func (s *PipelineApiTest) TestPipelineAPI() {
 	assert.Equal(t, 2, len(listFirstPagePipelines))
 	assert.Equal(t, 4, totalSize)
 	assert.Equal(t, "arguments-parameters.yaml", listFirstPagePipelines[0].Name)
-	assert.Equal(t, "arguments.zip", listFirstPagePipelines[1].Name)
+	assert.Equal(t, "arguments.pipeline.zip", listFirstPagePipelines[1].Name)
 	assert.NotEmpty(t, nextPageToken)
 
 	listSecondPagePipelines, totalSize, nextPageToken, err := s.pipelineClient.List(
@@ -139,7 +139,7 @@ func (s *PipelineApiTest) TestPipelineAPI() {
 	assert.Equal(t, 2, len(listSecondPagePipelines))
 	assert.Equal(t, 4, totalSize)
 	assert.Equal(t, "zip-arguments-parameters", listSecondPagePipelines[0].Name)
-	assert.Equal(t, "arguments.zip", listSecondPagePipelines[1].Name)
+	assert.Equal(t, "arguments.pipeline.zip", listSecondPagePipelines[1].Name)
 	assert.Empty(t, nextPageToken)
 
 	/* ---------- List pipelines sort by unsupported description field. Should fail. ---------- */
@@ -162,7 +162,7 @@ func (s *PipelineApiTest) TestPipelineAPI() {
 	assert.Nil(t, err)
 	assert.Equal(t, 2, len(listSecondPagePipelines))
 	assert.Equal(t, 4, totalSize)
-	assert.Equal(t, "arguments.zip", listSecondPagePipelines[0].Name)
+	assert.Equal(t, "arguments.pipeline.zip", listSecondPagePipelines[0].Name)
 	assert.Equal(t, "arguments-parameters.yaml", listSecondPagePipelines[1].Name)
 	assert.Empty(t, nextPageToken)