Add CloudBuild

internal/cmdexport/cmdexport.go

@@ -30,7 +30,7 @@ func ExportCommand() *cobra.Command {
 	return GetExportRunner().Command
 }
 
-// Create a ExportRunner instance and wire it to the corresponding Command.
+// GetExportRunner creates a ExportRunner instance and wires it to the corresponding Command.
 func GetExportRunner() *ExportRunner {
 	r := &ExportRunner{PipelineConfig: &types.PipelineConfig{}}
 	c := &cobra.Command{
@@ -81,7 +81,7 @@ type ExportRunner struct {
 	Pipeline orchestrators.Pipeline
 }
 
-// Generate the pipeline and write it into a file or stdout.
+// runE generates the pipeline and writes it into a file or stdout.
 func (r *ExportRunner) runE(c *cobra.Command, args []string) error {
 	pipeline := r.Pipeline.Init(r.PipelineConfig).Generate()
 

internal/cmdexport/orchestrators/cloudbuild.go

@@ -0,0 +1,61 @@
+// Copyright 2020 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.
+
+package orchestrators
+
+import (
+	"github.com/GoogleContainerTools/kpt/internal/cmdexport/types"
+	"sigs.k8s.io/kustomize/kyaml/yaml"
+)
+
+// CloudBuild is a simplified representation of Cloud Build config.
+// @see https://cloud.google.com/cloud-build/docs/build-config
+type CloudBuild struct {
+	Steps []CloudBuildStep `yaml:",omitempty"`
+}
+
+type CloudBuildStep struct {
+	Name string   `yaml:",omitempty"`
+	Args []string `yaml:",omitempty"`
+}
+
+func (p *CloudBuild) Init(config *types.PipelineConfig) Pipeline {
+	step := CloudBuildStep{}
+	step.Name = KptImage
+	step.Args = []string{
+		"fn",
+		"run",
+		config.Dir,
+	}
+
+	if fnPaths := config.FnPaths; len(fnPaths) > 0 {
+		step.Args = append(
+			step.Args,
+			append(
+				[]string{"--fn-path"},
+				fnPaths...
+			)...
+		)
+	}
+
+	p.Steps = []CloudBuildStep{step}
+
+	return p
+}
+
+func (p *CloudBuild) Generate() []byte {
+	data, _ := yaml.Marshal(p)
+
+	return data
+}

internal/cmdexport/orchestrators/cloudbuild_test.go

@@ -0,0 +1,75 @@
+// Copyright 2020 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.
+
+package orchestrators
+
+import "github.com/GoogleContainerTools/kpt/internal/cmdexport/types"
+
+var cloudBuildTestCases = []testCase{
+	{
+		description: "generates a Cloud Build pipeline",
+		config: &types.PipelineConfig{
+			Dir:     ".",
+			FnPaths: nil,
+		},
+		expected: `
+steps:
+  - name: gongpu/kpt:latest
+    args:
+      - fn
+      - run
+      - .
+`,
+	},
+	{
+		description: "generates a Cloud Build pipeline with --fn-path",
+		config: &types.PipelineConfig{
+			Dir:     "resources",
+			FnPaths: []string{"config/function.yaml"},
+		},
+		expected: `
+steps:
+  - name: gongpu/kpt:latest
+    args:
+      - fn
+      - run
+      - resources
+      - --fn-path
+      - config/function.yaml
+`,
+	},
+	{
+		description: "generates a Cloud Build pipeline with multiple --fn-path",
+		config: &types.PipelineConfig{
+			Dir:     "resources",
+			FnPaths: []string{"config/function1.yaml", "config/function2.yaml"},
+		},
+		expected: `
+steps:
+  - name: gongpu/kpt:latest
+    args:
+      - fn
+      - run
+      - resources
+      - --fn-path
+      - config/function1.yaml
+      - config/function2.yaml
+`,
+	},
+}
+
+var cloudBuildTestSuite = testSuite{
+	pipeline:  &CloudBuild{},
+	testCases: cloudBuildTestCases,
+}

internal/cmdexport/orchestrators/githubactions.go

@@ -22,7 +22,7 @@ import (
 	"sigs.k8s.io/kustomize/kyaml/yaml"
 )
 
-// Represent a GitHub Actions workflow.
+// GitHubActions represents a GitHub Actions workflow.
 // @see https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions
 type GitHubActions struct {
 	Name string                          `yaml:",omitempty"`

internal/cmdexport/orchestrators/pipeline_test.go

@@ -34,7 +34,10 @@ type testSuite struct {
 }
 
 func TestPipeline(t *testing.T) {
-	testSuites := []testSuite{githubActionsTestSuite}
+	testSuites := []testSuite{
+		githubActionsTestSuite,
+		cloudBuildTestSuite,
+	}
 
 	for _, testSuite := range testSuites {
 		pipeline := testSuite.pipeline

internal/cmdexport/types/PipelineConfig.go

@@ -14,7 +14,7 @@
 
 package types
 
-// Configuration of a pipeline.
+// PipelineConfig describes configuration of a pipeline.
 type PipelineConfig struct {
 	Dir     string
 	FnPaths []string