/
watch.go
111 lines (98 loc) · 2.81 KB
/
watch.go
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package commands
import (
"context"
"fmt"
"io"
"os"
"time"
"github.com/argoproj/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/argoproj/argo-workflows/v3/cmd/argo/commands/client"
workflowpkg "github.com/argoproj/argo-workflows/v3/pkg/apiclient/workflow"
wfv1 "github.com/argoproj/argo-workflows/v3/pkg/apis/workflow/v1alpha1"
"github.com/argoproj/argo-workflows/v3/util"
"github.com/argoproj/argo-workflows/v3/workflow/packer"
)
func NewWatchCommand() *cobra.Command {
var getArgs getFlags
command := &cobra.Command{
Use: "watch WORKFLOW",
Short: "watch a workflow until it completes",
Example: `# Watch a workflow:
argo watch my-wf
# Watch the latest workflow:
argo watch @latest
`,
Run: func(cmd *cobra.Command, args []string) {
if len(args) != 1 {
cmd.HelpFunc()(cmd, args)
os.Exit(1)
}
ctx, apiClient := client.NewAPIClient()
serviceClient := apiClient.NewWorkflowServiceClient()
namespace := client.Namespace()
watchWorkflow(ctx, serviceClient, namespace, args[0], getArgs)
},
}
command.Flags().StringVar(&getArgs.status, "status", "", "Filter by status (Pending, Running, Succeeded, Skipped, Failed, Error)")
command.Flags().StringVar(&getArgs.nodeFieldSelectorString, "node-field-selector", "", "selector of node to display, eg: --node-field-selector phase=abc")
return command
}
func watchWorkflow(ctx context.Context, serviceClient workflowpkg.WorkflowServiceClient, namespace string, workflow string, getArgs getFlags) {
req := &workflowpkg.WatchWorkflowsRequest{
Namespace: namespace,
ListOptions: &metav1.ListOptions{
FieldSelector: util.GenerateFieldSelectorFromWorkflowName(workflow),
ResourceVersion: "0",
},
}
stream, err := serviceClient.WatchWorkflows(ctx, req)
errors.CheckError(err)
wfChan := make(chan *wfv1.Workflow)
go func() {
for {
event, err := stream.Recv()
if err == io.EOF {
log.Debug("Re-establishing workflow watch")
stream, err = serviceClient.WatchWorkflows(ctx, req)
errors.CheckError(err)
continue
}
errors.CheckError(err)
if event == nil {
continue
}
wfChan <- event.Object
}
}()
var wf *wfv1.Workflow
ticker := time.NewTicker(time.Second)
for {
select {
case newWf := <-wfChan:
// If we get a new event, update our workflow
if newWf == nil {
return
}
wf = newWf
case <-ticker.C:
// If we don't, refresh the workflow screen every second
}
printWorkflowStatus(wf, getArgs)
if wf != nil && !wf.Status.FinishedAt.IsZero() {
return
}
}
}
func printWorkflowStatus(wf *wfv1.Workflow, getArgs getFlags) {
if wf == nil {
return
}
err := packer.DecompressWorkflow(wf)
errors.CheckError(err)
print("\033[H\033[2J")
print("\033[0;0H")
fmt.Print(printWorkflowHelper(wf, getArgs))
}