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step_create_buildtemplate.go
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step_create_buildtemplate.go
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package cmd
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/ghodss/yaml"
"github.com/jenkins-x/jx/pkg/jenkinsfile"
"github.com/jenkins-x/jx/pkg/jenkinsfile/gitresolver"
"github.com/jenkins-x/jx/pkg/jx/cmd/templates"
"github.com/jenkins-x/jx/pkg/kube"
"github.com/jenkins-x/jx/pkg/log"
"github.com/jenkins-x/jx/pkg/util"
buildapi "github.com/knative/build/pkg/apis/build/v1alpha1"
"github.com/pkg/errors"
"github.com/spf13/cobra"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
defaultContainerName = "maven"
)
var (
createBuildTemplateLong = templates.LongDesc(`
Creates a Knative build resource for a project
`)
createBuildTemplateExample = templates.Examples(`
# create a Knative build and render to the console
jx step create buildtemplate
# create a Knative build
jx step create buildtemplate -o mybuild.yaml
`)
)
// StepCreateBuildTemplateOptions contains the command line flags
type StepCreateBuildTemplateOptions struct {
StepOptions
Dir string
OutputDir string
BuildPackURL string
BuildPackRef string
PodTemplates map[string]*corev1.Pod
MissingPodTemplates map[string]bool
}
// NewCmdStepCreateBuildTemplate Creates a new Command object
func NewCmdStepCreateBuildTemplate(commonOpts *CommonOptions) *cobra.Command {
options := &StepCreateBuildTemplateOptions{
StepOptions: StepOptions{
CommonOptions: commonOpts,
},
}
cmd := &cobra.Command{
Use: "buildtemplate",
Short: "Creates a Knative build templates based on the current build pack",
Long: createBuildTemplateLong,
Example: createBuildTemplateExample,
Aliases: []string{"bt"},
Run: func(cmd *cobra.Command, args []string) {
options.Cmd = cmd
options.Args = args
err := options.Run()
CheckErr(err)
},
}
cmd.Flags().StringVarP(&options.Dir, "dir", "d", "", "The directory to query to find the projects .git directory")
cmd.Flags().StringVarP(&options.OutputDir, "output-dir", "o", "jx-build-templates", "The directory where the generated build yaml files will be output to")
cmd.Flags().StringVarP(&options.BuildPackURL, "url", "u", "", "The URL for the build pack Git repository")
cmd.Flags().StringVarP(&options.BuildPackRef, "ref", "r", "", "The Git reference (branch,tag,sha) in the Git repository to use")
return cmd
}
// Run implements this command
func (o *StepCreateBuildTemplateOptions) Run() error {
if o.BuildPackURL == "" || o.BuildPackRef == "" {
settings, err := o.TeamSettings()
if err != nil {
return err
}
if o.BuildPackURL == "" {
o.BuildPackURL = settings.BuildPackURL
}
if o.BuildPackRef == "" {
o.BuildPackRef = settings.BuildPackRef
}
}
if o.BuildPackURL == "" {
return util.MissingOption("url")
}
if o.BuildPackRef == "" {
return util.MissingOption("ref")
}
if o.OutputDir == "" {
return util.MissingOption("output-dir")
}
err := o.loadPodTemplates()
if err != nil {
return err
}
o.MissingPodTemplates = map[string]bool{}
err = os.MkdirAll(o.OutputDir, util.DefaultWritePermissions)
if err != nil {
return errors.Wrapf(err, "failed to create output dir %s", o.OutputDir)
}
packDir, err := gitresolver.InitBuildPack(o.Git(), o.BuildPackURL, o.BuildPackRef)
if err != nil {
return err
}
files, err := ioutil.ReadDir(packDir)
if err != nil {
return err
}
resolver, err := gitresolver.CreateResolver(packDir, o.Git())
if err != nil {
return err
}
for _, f := range files {
if f.IsDir() {
name := f.Name()
pipelineFile := filepath.Join(packDir, name, jenkinsfile.PipelineConfigFileName)
exists, err := util.FileExists(pipelineFile)
if err != nil {
return err
}
if exists {
pipelineConfig, err := jenkinsfile.LoadPipelineConfig(pipelineFile, resolver, true, false)
if err != nil {
return err
}
err = o.generateBuildTemplate(name, pipelineConfig)
if err != nil {
return err
}
} else {
log.Infof("No pipeline YAML file for %s\n", pipelineFile)
}
}
}
for k := range o.MissingPodTemplates {
log.Warnf("Missing pod template for container %s\n", k)
}
log.Infof("generated build packs at %s\n", util.ColorInfo(o.OutputDir))
return err
}
func (o *StepCreateBuildTemplateOptions) loadPodTemplates() error {
o.PodTemplates = map[string]*corev1.Pod{}
kubeClient, ns, err := o.KubeClientAndDevNamespace()
if err != nil {
return err
}
configMapName := kube.ConfigMapJenkinsPodTemplates
cm, err := kubeClient.CoreV1().ConfigMaps(ns).Get(configMapName, metav1.GetOptions{})
if err != nil {
return err
}
for k, v := range cm.Data {
pod := &corev1.Pod{}
if v != "" {
err := yaml.Unmarshal([]byte(v), pod)
if err != nil {
return err
}
o.PodTemplates[k] = pod
}
}
return nil
}
func (o *StepCreateBuildTemplateOptions) generateBuildTemplate(name string, pipelineConfig *jenkinsfile.PipelineConfig) error {
pipelines := pipelineConfig.Pipelines
err := o.generatePipeline(name, pipelineConfig, pipelines.Release, "release")
if err != nil {
return err
}
err = o.generatePipeline(name, pipelineConfig, pipelines.PullRequest, "pullrequest")
if err != nil {
return err
}
return o.generatePipeline(name, pipelineConfig, pipelines.Feature, "feature")
}
func (o *StepCreateBuildTemplateOptions) generatePipeline(languageName string, pipelineConfig *jenkinsfile.PipelineConfig, lifecycles *jenkinsfile.PipelineLifecycles, templateKind string) error {
if lifecycles == nil {
return nil
}
container := pipelineConfig.Agent.Container
dir := "/workspace"
steps := []corev1.Container{}
for _, n := range lifecycles.All() {
l := n.Lifecycle
if l == nil {
continue
}
for _, s := range l.Steps {
ss, err := o.createSteps(languageName, pipelineConfig, templateKind, s, container, dir)
if err != nil {
return err
}
steps = append(steps, ss...)
}
}
name := "jx-buildtemplate-" + languageName + "-" + templateKind
build := &buildapi.BuildTemplate{
TypeMeta: metav1.TypeMeta{
APIVersion: "build.knative.dev/v1alpha1",
Kind: "BuildTemplate",
},
ObjectMeta: metav1.ObjectMeta{
Name: kube.ToValidName(name),
},
Spec: buildapi.BuildTemplateSpec{
Steps: steps,
},
}
fileName := filepath.Join(o.OutputDir, name+".yaml")
data, err := yaml.Marshal(build)
if err != nil {
return errors.Wrapf(err, "failed to marshal Build YAML")
}
err = ioutil.WriteFile(fileName, data, util.DefaultWritePermissions)
if err != nil {
return errors.Wrapf(err, "failed to save build template file %s", fileName)
}
return nil
}
func (o *StepCreateBuildTemplateOptions) createSteps(languageName string, pipelineConfig *jenkinsfile.PipelineConfig, templateKind string, step *jenkinsfile.PipelineStep, containerName string, dir string) ([]corev1.Container, error) {
steps := []corev1.Container{}
if step.Container != "" {
containerName = step.Container
} else if step.Dir != "" {
dir = step.Dir
}
if step.Command != "" {
if containerName == "" {
containerName = defaultContainerName
}
podTemplate := o.PodTemplates[containerName]
if podTemplate == nil {
o.MissingPodTemplates[containerName] = true
podTemplate = o.PodTemplates[defaultContainerName]
}
containers := podTemplate.Spec.Containers
if len(containers) == 0 {
return steps, fmt.Errorf("No Containers for pod template %s", containerName)
}
c := containers[0]
c.Command = []string{"/bin/sh"}
c.Args = []string{"-c", step.Command}
if strings.HasPrefix(dir, "./") {
dir = "/workspace" + strings.TrimPrefix(dir, ".")
}
if !filepath.IsAbs(dir) {
dir = filepath.Join("/workspace", dir)
}
c.WorkingDir = dir
// TODO use different image based on if its jx or not?
c.Image = "jenkinsxio/jx:latest"
steps = append(steps, c)
}
for _, s := range step.Steps {
childSteps, err := o.createSteps(languageName, pipelineConfig, templateKind, s, containerName, dir)
if err != nil {
return steps, err
}
steps = append(steps, childSteps...)
}
return steps, nil
}