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startbuild.go
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startbuild.go
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package cmd
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"strings"
"github.com/golang/glog"
"github.com/spf13/cobra"
kapi "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
cmdutil "github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl/cmd/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
buildapi "github.com/openshift/origin/pkg/build/api"
osclient "github.com/openshift/origin/pkg/client"
"github.com/openshift/origin/pkg/cmd/util/clientcmd"
"github.com/openshift/origin/pkg/generate/git"
)
const (
startBuildLong = `Start a build.
This command starts a build for the provided BuildConfig or re-runs an existing build using
--from-build=<name>. You may pass the --follow flag to see output from the build.`
startBuildExample = ` // Starts build from BuildConfig matching the name "3bd2ug53b"
$ %[1]s start-build 3bd2ug53b
// Starts build from build matching the name "3bd2ug53b"
$ %[1]s start-build --from-build=3bd2ug53b
// Starts build from BuildConfig matching the name "3bd2ug53b" and watches the logs until the build
// completes or fails
$ %[1]s start-build 3bd2ug53b --follow`
)
// NewCmdStartBuild implements the OpenShift cli start-build command
func NewCmdStartBuild(fullName string, f *clientcmd.Factory, out io.Writer) *cobra.Command {
webhooks := util.StringFlag{}
webhooks.Default("none")
cmd := &cobra.Command{
Use: "start-build (BUILDCONFIG | --from-build=BUILD)",
Short: "Starts a new build",
Long: startBuildLong,
Example: fmt.Sprintf(startBuildExample, fullName),
Run: func(cmd *cobra.Command, args []string) {
err := RunStartBuild(f, out, cmd, args, webhooks)
cmdutil.CheckErr(err)
},
}
cmd.Flags().String("from-build", "", "Specify the name of a build which should be re-run")
cmd.Flags().Bool("follow", false, "Start a build and watch its logs until it completes or fails")
cmd.Flags().Var(&webhooks, "list-webhooks", "List the webhooks for the specified BuildConfig or build; accepts 'all', 'generic', or 'github'")
cmd.Flags().String("from-webhook", "", "Specify a webhook URL for an existing BuildConfign to trigger")
cmd.Flags().String("git-post-receive", "", "The contents of the post-receive hook to trigger a build")
cmd.Flags().String("git-repository", "", "The path to the git repository for post-receive; defaults to the current directory")
return cmd
}
// RunStartBuild contains all the necessary functionality for the OpenShift cli start-build command
func RunStartBuild(f *clientcmd.Factory, out io.Writer, cmd *cobra.Command, args []string, webhooks util.StringFlag) error {
webhook := cmdutil.GetFlagString(cmd, "from-webhook")
buildName := cmdutil.GetFlagString(cmd, "from-build")
follow := cmdutil.GetFlagBool(cmd, "follow")
switch {
case len(webhook) > 0:
if len(args) > 0 || len(buildName) > 0 {
return cmdutil.UsageError(cmd, "The '--from-webhook' flag is incompatible with arguments or '--from-build'")
}
path := cmdutil.GetFlagString(cmd, "git-repository")
postReceivePath := cmdutil.GetFlagString(cmd, "git-post-receive")
repo := git.NewRepository()
return RunStartBuildWebHook(f, out, webhook, path, postReceivePath, repo)
case len(args) != 1 && len(buildName) == 0:
return cmdutil.UsageError(cmd, "Must pass a name of a BuildConfig or specify build name with '--from-build' flag")
}
name := buildName
isBuild := true
if len(name) == 0 {
name = args[0]
isBuild = false
}
if webhooks.Provided() {
return RunListBuildWebHooks(f, out, cmd.Out(), name, isBuild, webhooks.String())
}
client, _, err := f.Clients()
if err != nil {
return err
}
namespace, err := f.DefaultNamespace()
if err != nil {
return err
}
request := &buildapi.BuildRequest{
ObjectMeta: kapi.ObjectMeta{Name: name},
}
var newBuild *buildapi.Build
if isBuild {
if newBuild, err = client.Builds(namespace).Clone(request); err != nil {
return err
}
} else {
if newBuild, err = client.BuildConfigs(namespace).Instantiate(request); err != nil {
return err
}
}
fmt.Fprintf(out, "%s\n", newBuild.Name)
if follow {
opts := buildapi.BuildLogOptions{
Follow: true,
NoWait: false,
}
rd, err := client.BuildLogs(namespace).Get(newBuild.Name, opts).Stream()
if err != nil {
return fmt.Errorf("error getting logs: %v", err)
}
defer rd.Close()
_, err = io.Copy(out, rd)
if err != nil {
return fmt.Errorf("error streaming logs: %v", err)
}
}
return nil
}
// RunListBuildWebHooks prints the webhooks for the provided build config.
func RunListBuildWebHooks(f *clientcmd.Factory, out, errOut io.Writer, name string, isBuild bool, webhookFilter string) error {
generic, github := false, false
prefix := false
switch webhookFilter {
case "all":
generic, github = true, true
prefix = true
case "generic":
generic = true
case "github":
github = true
default:
return fmt.Errorf("--list-webhooks must be 'all', 'generic', or 'github'")
}
client, _, err := f.Clients()
if err != nil {
return err
}
namespace, err := f.DefaultNamespace()
if err != nil {
return err
}
if isBuild {
build, err := client.Builds(namespace).Get(name)
if err != nil {
return err
}
ref := build.Config
if ref == nil {
return fmt.Errorf("the provided Build %q was not created from a BuildConfig and cannot have webhooks", name)
}
if len(ref.Namespace) > 0 {
namespace = ref.Namespace
}
name = ref.Name
}
config, err := client.BuildConfigs(namespace).Get(name)
if err != nil {
return err
}
for _, t := range config.Triggers {
hookType := ""
switch {
case t.GenericWebHook != nil && generic:
if prefix {
hookType = "generic "
}
case t.GitHubWebHook != nil && github:
if prefix {
hookType = "github "
}
default:
continue
}
url, err := client.BuildConfigs(namespace).WebHookURL(name, &t)
if err != nil {
if err != osclient.ErrTriggerIsNotAWebHook {
fmt.Fprintf(errOut, "error: unable to get webhook for %s: %v", name, err)
}
continue
}
fmt.Fprintf(out, "%s%s\n", hookType, url.String())
}
return nil
}
// RunStartBuildWebHook tries to trigger the provided webhook. It will attempt to utilize the current client
// configuration if the webhook has the same URL.
func RunStartBuildWebHook(f *clientcmd.Factory, out io.Writer, webhook string, path, postReceivePath string, repo git.Repository) error {
hook, err := url.Parse(webhook)
if err != nil {
return err
}
event, err := hookEventFromPostReceive(repo, path, postReceivePath)
if err != nil {
return err
}
// TODO: should be a versioned struct
data, err := json.Marshal(event)
if err != nil {
return err
}
httpClient := http.DefaultClient
// when using HTTPS, try to reuse the local config transport if possible to get a client cert
// TODO: search all configs
if hook.Scheme == "https" {
config, err := f.OpenShiftClientConfig.ClientConfig()
if err == nil {
if url, err := client.DefaultServerURL(config.Host, "", "test", true); err == nil {
if url.Host == hook.Host && url.Scheme == hook.Scheme {
if rt, err := client.TransportFor(config); err == nil {
httpClient = &http.Client{Transport: rt}
}
}
}
}
}
glog.V(4).Infof("Triggering hook %s\n%s", hook, string(data))
resp, err := httpClient.Post(hook.String(), "application/json", bytes.NewBuffer(data))
if err != nil {
return err
}
switch {
case resp.StatusCode == 301 || resp.StatusCode == 302:
// TODO: follow redirect and display output
case resp.StatusCode < 200 || resp.StatusCode >= 300:
body, _ := ioutil.ReadAll(resp.Body)
return fmt.Errorf("server rejected our request %d\nremote: %s", resp.StatusCode, string(body))
}
return nil
}
// hookEventFromPostReceive creates a GenericWebHookEvent from the provided git repository and
// post receive input. If no inputs are available will return an empty event.
func hookEventFromPostReceive(repo git.Repository, path, postReceivePath string) (*buildapi.GenericWebHookEvent, error) {
// TODO: support other types of refs
event := &buildapi.GenericWebHookEvent{
Type: buildapi.BuildSourceGit,
Git: &buildapi.GitInfo{},
}
// attempt to extract a post receive body
refs := []git.ChangedRef{}
switch receive := postReceivePath; {
case receive == "-":
r, err := git.ParsePostReceive(os.Stdin)
if err != nil {
return nil, err
}
refs = r
case len(receive) > 0:
file, err := os.Open(receive)
if err != nil {
return nil, fmt.Errorf("unable to open --git-post-receive argument as a file: %v", err)
}
defer file.Close()
r, err := git.ParsePostReceive(file)
if err != nil {
return nil, err
}
refs = r
}
for _, ref := range refs {
if len(ref.New) == 0 || ref.New == ref.Old {
continue
}
info, err := gitRefInfo(repo, path, ref.New)
if err != nil {
glog.V(4).Infof("Could not retrieve info for %s:%s: %v", ref.Ref, ref.New, err)
}
info.Ref = ref.Ref
info.Commit = ref.New
event.Git.Refs = append(event.Git.Refs, info)
}
return event, nil
}
// gitRefInfo extracts a buildapi.GitRefInfo from the specified repository or returns
// an error.
func gitRefInfo(repo git.Repository, dir, ref string) (buildapi.GitRefInfo, error) {
info := buildapi.GitRefInfo{}
if repo == nil {
return info, nil
}
out, err := repo.ShowFormat(dir, ref, "%an%n%ae%n%cn%n%ce%n%B")
if err != nil {
return info, err
}
lines := strings.SplitN(out, "\n", 5)
if len(lines) != 5 {
full := make([]string, 5)
copy(full, lines)
lines = full
}
info.Author.Name = lines[0]
info.Author.Email = lines[1]
info.Committer.Name = lines[2]
info.Committer.Email = lines[3]
info.Message = lines[4]
return info, nil
}