add taskrun describe command

docs/cmd/tkn_taskrun.md

@@ -20,6 +20,7 @@ Manage taskruns
 
 * [tkn](tkn.md)	 - CLI for tekton pipelines
 * [tkn taskrun delete](tkn_taskrun_delete.md)	 - Delete a taskrun in a namespace
+* [tkn taskrun describe](tkn_taskrun_describe.md)	 - Describe a taskrun in a namespace
 * [tkn taskrun list](tkn_taskrun_list.md)	 - Lists taskruns in a namespace
 * [tkn taskrun logs](tkn_taskrun_logs.md)	 - Show taskruns logs
 

docs/cmd/tkn_taskrun_describe.md

@@ -0,0 +1,45 @@
+## tkn taskrun describe
+
+Describe a taskrun in a namespace
+
+***Aliases**: desc*
+
+### Usage
+
+```
+tkn taskrun describe
+```
+
+### Synopsis
+
+Describe a taskrun in a namespace
+
+### Examples
+
+
+# Describe a TaskRun of name 'foo' in namespace 'bar'
+tkn taskrun describe foo -n bar
+
+tkn tr desc foo -n bar",
+
+
+### Options
+
+```
+      --allow-missing-template-keys   If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats. (default true)
+  -h, --help                          help for describe
+  -o, --output string                 Output format. One of: json|yaml|name|go-template|go-template-file|template|templatefile|jsonpath|jsonpath-file.
+      --template string               Template string or path to template file to use when -o=go-template, -o=go-template-file. The template format is golang templates [http://golang.org/pkg/text/template/#pkg-overview].
+```
+
+### Options inherited from parent commands
+
+```
+  -k, --kubeconfig string   kubectl config file (default: $HOME/.kube/config)
+  -n, --namespace string    namespace to use (default: from $KUBECONFIG)
+```
+
+### SEE ALSO
+
+* [tkn taskrun](tkn_taskrun.md)	 - Manage taskruns
+

docs/man/man1/tkn-taskrun-describe.1

@@ -0,0 +1,62 @@
+.TH "TKN\-TASKRUN\-DESCRIBE" "1" "Sep 2019" "Auto generated by spf13/cobra" "" 
+.nh
+.ad l
+
+
+.SH NAME
+.PP
+tkn\-taskrun\-describe \- Describe a taskrun in a namespace
+
+
+.SH SYNOPSIS
+.PP
+\fBtkn taskrun describe\fP
+
+
+.SH DESCRIPTION
+.PP
+Describe a taskrun in a namespace
+
+
+.SH OPTIONS
+.PP
+\fB\-\-allow\-missing\-template\-keys\fP[=true]
+    If true, ignore any errors in templates when a field or map key is missing in the template. Only applies to golang and jsonpath output formats.
+
+.PP
+\fB\-h\fP, \fB\-\-help\fP[=false]
+    help for describe
+
+.PP
+\fB\-o\fP, \fB\-\-output\fP=""
+    Output format. One of: json|yaml|name|go\-template|go\-template\-file|template|templatefile|jsonpath|jsonpath\-file.
+
+.PP
+\fB\-\-template\fP=""
+    Template string or path to template file to use when \-o=go\-template, \-o=go\-template\-file. The template format is golang templates [
+\[la]http://golang.org/pkg/text/template/#pkg-overview\[ra]].
+
+
+.SH OPTIONS INHERITED FROM PARENT COMMANDS
+.PP
+\fB\-k\fP, \fB\-\-kubeconfig\fP=""
+    kubectl config file (default: $HOME/.kube/config)
+
+.PP
+\fB\-n\fP, \fB\-\-namespace\fP=""
+    namespace to use (default: from $KUBECONFIG)
+
+
+.SH EXAMPLE
+
+.SH Describe a TaskRun of name 'foo' in namespace 'bar'
+.PP
+tkn taskrun describe foo \-n bar
+
+.PP
+tkn tr desc foo \-n bar",
+
+
+.SH SEE ALSO
+.PP
+\fBtkn\-taskrun(1)\fP

pkg/cmd/taskrun/describe.go

@@ -0,0 +1,174 @@
+// Copyright © 2019 The Tekton Authors.
+//
+// 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 taskrun
+
+import (
+	"fmt"
+
+	"text/tabwriter"
+	"text/template"
+
+	"github.com/spf13/cobra"
+	"github.com/tektoncd/cli/pkg/cli"
+	"github.com/tektoncd/cli/pkg/formatted"
+	"github.com/tektoncd/pipeline/pkg/apis/pipeline/v1alpha1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	cliopts "k8s.io/cli-runtime/pkg/genericclioptions"
+)
+
+const templ = `Name:	{{ .TaskRun.Name }}
+Namespace:	{{ .TaskRun.Namespace }}
+Task Ref:	{{ .TaskRun.Spec.TaskRef.Name }}
+{{- if ne .TaskRun.Spec.ServiceAccount "" }}
+Service Account:	{{ .TaskRun.Spec.ServiceAccount }}
+{{- end }}
+
+Status
+STARTED 	DURATION 	STATUS
+{{ formatAge .TaskRun.Status.StartTime  .Params.Time }}	{{ formatDuration .TaskRun.Status.StartTime .TaskRun.Status.CompletionTime }}	{{ formatCondition .TaskRun.Status.Conditions }}
+{{- $msg := hasFailed .TaskRun -}}
+{{-  if ne $msg "" }}
+
+Message
+{{ $msg }}
+{{- end }}
+
+Inputs
+{{- $l := len .TaskRun.Spec.Inputs.Resources }}{{ if eq $l 0 }}
+No resources
+{{- else }}
+NAME	RESOURCE REF
+{{- range $i, $r := .TaskRun.Spec.Inputs.Resources }}
+{{$r.Name }}	{{ $r.ResourceRef.Name }}
+{{- end }}
+{{- end }}
+
+Outputs
+{{- $l := len .TaskRun.Spec.Outputs.Resources }}{{ if eq $l 0 }}
+No resources
+{{- else }}
+NAME	RESOURCE REF
+{{- range $i, $r := .TaskRun.Spec.Outputs.Resources }}
+{{$r.Name }}	{{ $r.ResourceRef.Name }}
+{{- end }}
+{{- end }}
+
+Params
+{{- $l := len .TaskRun.Spec.Inputs.Params }}{{ if eq $l 0 }}
+No params
+{{- else }}
+NAME	VALUE
+{{- range $i, $p := .TaskRun.Spec.Inputs.Params }}
+{{- if eq $p.Value.Type "string" }}
+{{ $p.Name }}	{{ $p.Value.StringVal }}
+{{- else }}
+{{ $p.Name }}	{{ $p.Value.ArrayVal }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+Steps
+{{- $l := len .TaskRun.Status.Steps }}{{ if eq $l 0 }}
+No steps
+{{- else }}
+STEP NAME
+{{- range $steps := .TaskRun.Status.Steps }}
+{{ $steps.Name }}
+{{- end }}
+{{- end }}
+`
+
+func describeCommand(p cli.Params) *cobra.Command {
+	f := cliopts.NewPrintFlags("describe")
+	eg := `
+# Describe a TaskRun of name 'foo' in namespace 'bar'
+tkn taskrun describe foo -n bar
+
+tkn tr desc foo -n bar",
+`
+
+	c := &cobra.Command{
+		Use:          "describe",
+		Aliases:      []string{"desc"},
+		Short:        "Describe a taskrun in a namespace",
+		Example:      eg,
+		Args:         cobra.MinimumNArgs(1),
+		SilenceUsage: true,
+		Annotations: map[string]string{
+			"commandType": "main",
+		},
+		RunE: func(cmd *cobra.Command, args []string) error {
+			s := &cli.Stream{
+				Out: cmd.OutOrStdout(),
+				Err: cmd.OutOrStderr(),
+			}
+			return printTaskRunDescription(s, args[0], p)
+		},
+	}
+
+	_ = c.MarkZshCompPositionalArgumentCustom(1, "__tkn_get_taskrun")
+	f.AddFlags(c)
+
+	return c
+}
+
+func printTaskRunDescription(s *cli.Stream, trName string, p cli.Params) error {
+	cs, err := p.Clients()
+	if err != nil {
+		return fmt.Errorf("failed to create tekton client")
+	}
+
+	tr, err := cs.Tekton.TektonV1alpha1().TaskRuns(p.Namespace()).Get(trName, metav1.GetOptions{})
+	if err != nil {
+		return fmt.Errorf("failed to find taskrun %q", trName)
+	}
+
+	var data = struct {
+		TaskRun *v1alpha1.TaskRun
+		Params  cli.Params
+	}{
+		TaskRun: tr,
+		Params:  p,
+	}
+
+	funcMap := template.FuncMap{
+		"formatAge":       formatted.Age,
+		"formatDuration":  formatted.Duration,
+		"formatCondition": formatted.Condition,
+		"hasFailed":       hasFailed,
+	}
+
+	w := tabwriter.NewWriter(s.Out, 0, 5, 3, ' ', tabwriter.TabIndent)
+	t := template.Must(template.New("Describe taskrun").Funcs(funcMap).Parse(templ))
+
+	err = t.Execute(w, data)
+	if err != nil {
+		fmt.Fprintf(s.Err, "Failed to execute template")
+		return err
+	}
+	return w.Flush()
+}
+
+func hasFailed(tr *v1alpha1.TaskRun) string {
+	if len(tr.Status.Conditions) == 0 {
+		return ""
+	}
+
+	if tr.Status.Conditions[0].Status == corev1.ConditionFalse {
+		return tr.Status.Conditions[0].Message
+	}
+	return ""
+}