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cancelbuild.go
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cancelbuild.go
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package cmd
import (
"fmt"
"io"
"github.com/golang/glog"
"github.com/spf13/cobra"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/errors"
kcmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"k8s.io/kubernetes/pkg/kubectl/resource"
buildapi "github.com/openshift/origin/pkg/build/api"
"github.com/openshift/origin/pkg/cmd/util/clientcmd"
)
const (
cancelBuildLong = `
Cancels a pending or running build
This command requests a graceful shutdown of the running build. There may be a delay between requesting
the build and the time the build is terminated.`
cancelBuildExample = ` # Cancel the build with the given name
$ %[1]s cancel-build 1da32cvq
# Cancel the named build and print the build logs
$ %[1]s cancel-build 1da32cvq --dump-logs
# Cancel the named build and create a new one with the same parameters
$ %[1]s cancel-build 1da32cvq --restart`
)
// NewCmdCancelBuild implements the OpenShift cli cancel-build command
func NewCmdCancelBuild(fullName string, f *clientcmd.Factory, out io.Writer) *cobra.Command {
cmd := &cobra.Command{
Use: "cancel-build BUILD",
Short: "Cancel a pending or running build",
Long: cancelBuildLong,
Example: fmt.Sprintf(cancelBuildExample, fullName),
SuggestFor: []string{"builds", "stop-build"},
Run: func(cmd *cobra.Command, args []string) {
err := RunCancelBuild(f, out, cmd, args)
kcmdutil.CheckErr(err)
},
}
cmd.Flags().Bool("dump-logs", false, "Specify if the build logs for the cancelled build should be shown.")
cmd.Flags().Bool("restart", false, "Specify if a new build should be created after the current build is cancelled.")
//cmdutil.AddOutputFlagsForMutation(cmd)
return cmd
}
// RunCancelBuild contains all the necessary functionality for the OpenShift cli cancel-build command
func RunCancelBuild(f *clientcmd.Factory, out io.Writer, cmd *cobra.Command, args []string) error {
if len(args) == 0 || len(args[0]) == 0 {
return kcmdutil.UsageError(cmd, "You must specify the name of a build to cancel.")
}
buildName := args[0]
namespace, _, err := f.DefaultNamespace()
if err != nil {
return err
}
client, _, err := f.Clients()
if err != nil {
return err
}
buildClient := client.Builds(namespace)
mapper, typer := f.Object()
obj, err := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), kapi.Codecs.UniversalDecoder()).
NamespaceParam(namespace).
ResourceNames("builds", buildName).
SingleResourceType().
Do().Object()
if err != nil {
return err
}
build, ok := obj.(*buildapi.Build)
if !ok {
return fmt.Errorf("%q is not a valid build", buildName)
}
if !isBuildCancellable(build, out) {
return nil
}
// Print build logs before cancelling build.
if kcmdutil.GetFlagBool(cmd, "dump-logs") {
opts := buildapi.BuildLogOptions{
NoWait: true,
}
response, err := client.BuildLogs(namespace).Get(build.Name, opts).Do().Raw()
if err != nil {
glog.Errorf("Could not fetch build logs for %s: %v", build.Name, err)
} else {
glog.Infof("Build logs for %s:\n%v", build.Name, string(response))
}
}
// Mark build to be cancelled.
for {
build.Status.Cancelled = true
if _, err = buildClient.Update(build); err != nil && errors.IsConflict(err) {
build, err = buildClient.Get(build.Name)
if err != nil {
return err
}
continue
}
if err != nil {
return err
}
break
}
fmt.Fprintf(out, "Build %s was cancelled.\n", build.Name)
// mapper, typer := f.Object()
// resourceMapper := &resource.Mapper{ObjectTyper: typer, RESTMapper: mapper, ClientMapper: f.ClientMapperForCommand()}
// shortOutput := kcmdutil.GetFlagString(cmd, "output") == "name"
// Create a new build with the same configuration.
if kcmdutil.GetFlagBool(cmd, "restart") {
request := &buildapi.BuildRequest{
ObjectMeta: kapi.ObjectMeta{Name: build.Name},
}
newBuild, err := client.Builds(namespace).Clone(request)
if err != nil {
return err
}
fmt.Fprintf(out, "Restarted build %s.\n", build.Name)
fmt.Fprintf(out, "%s\n", newBuild.Name)
// fmt.Fprintf(out, "%s\n", newBuild.Name)
// info, err := resourceMapper.InfoForObject(newBuild)
// if err != nil {
// return err
// }
//kcmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "restarted")
} else {
fmt.Fprintf(out, "%s\n", build.Name)
// info, err := resourceMapper.InfoForObject(build)
// if err != nil {
// return err
// }
// kcmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "cancelled")
}
return nil
}
// isBuildCancellable checks if another cancellation event was triggered, and if the build status is correct.
func isBuildCancellable(build *buildapi.Build, out io.Writer) bool {
if build.Status.Cancelled {
fmt.Fprintf(out, "A cancellation event was already triggered for the build %s.\n", build.Name)
return false
}
if build.Status.Phase != buildapi.BuildPhaseNew &&
build.Status.Phase != buildapi.BuildPhasePending &&
build.Status.Phase != buildapi.BuildPhaseRunning {
fmt.Fprintf(out, "A build can be cancelled only if it has new/pending/running status.\n")
return false
}
return true
}