Merge pull request #42103 from superbrothers/kubectl-context-completion

Automatic merge from submit-queue (batch tested with PRs 38676, 41765, 42103, 41833, 41702) Support --context flag completion for kubectl **What this PR does / why we need it**: With this PR, `--context` flag completion is supported for kubectl. **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # **Special notes for your reviewer**: **Release note**: ```release-note ```

Merge pull request #42103 from superbrothers/kubectl-context-completion
ba7c533f · Kubernetes Submit Queue · GitHub · bd3ac1c2 · 4da41ca5 · ba7c533f
Commit ba7c533f authored Mar 01, 2017 by Kubernetes Submit Queue Committed by GitHub Mar 01, 2017
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cmd.go pkg/kubectl/cmd/cmd.go +19 -0

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--- a/pkg/kubectl/cmd/cmd.go
+++ b/pkg/kubectl/cmd/cmd.go
@@ -76,6 +76,15 @@ __kubectl_get_namespaces()
    fi
 }
+__kubectl_get_contexts()
+{
+    local template kubectl_out
+    template="{{ range .contexts  }}{{ .name }} {{ end }}"
+    if kubectl_out=$(kubectl config $(__kubectl_override_flags) -o template --template="${template}" view 2>/dev/null); then
+        COMPREPLY=( $( compgen -W "${kubectl_out[*]}" -- "$cur" ) )
+    fi
+}
 __kubectl_parse_get()
 {
    local template
@@ -326,6 +335,16 @@ func NewKubectlCommand(f cmdutil.Factory, in io.Reader, out, err io.Writer) *cob
 		)
 	}
+	if cmds.Flag("context") != nil {
+		if cmds.Flag("context").Annotations == nil {
+			cmds.Flag("context").Annotations = map[string][]string{}
+		}
+		cmds.Flag("context").Annotations[cobra.BashCompCustom] = append(
+			cmds.Flag("context").Annotations[cobra.BashCompCustom],
+			"__kubectl_get_contexts",
+		)
+	}
 	cmds.AddCommand(cmdconfig.NewCmdConfig(clientcmd.NewDefaultPathOptions(), out, err))
 	cmds.AddCommand(NewCmdVersion(f, out))
 	cmds.AddCommand(NewCmdApiVersions(f, out))