From 05d93b2c7aa248dbd2a6ea51a90b9c68e2c3a8d0 Mon Sep 17 00:00:00 2001
From: Matthew Fisher <matt.fisher@microsoft.com>
Date: Tue, 24 Sep 2019 11:41:31 -0700
Subject: [PATCH] feat(cmd): implement `helm get --template`

Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>
---
 cmd/helm/get.go                                   | 11 ++++++++++-
 cmd/helm/get_test.go                              |  5 +++++
 cmd/helm/testdata/output/get-release-template.txt |  1 +
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 cmd/helm/testdata/output/get-release-template.txt

diff --git a/cmd/helm/get.go b/cmd/helm/get.go
index bc98c33c2..acbe5fe27 100644
--- a/cmd/helm/get.go
+++ b/cmd/helm/get.go
@@ -39,6 +39,7 @@ chart, the supplied values, and the generated manifest file.
 `
 
 func newGetCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
+	var template string
 	client := action.NewGet(cfg)
 
 	cmd := &cobra.Command{
@@ -51,11 +52,19 @@ func newGetCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 			if err != nil {
 				return err
 			}
+			if template != "" {
+				data := map[string]interface{}{
+					"Release": res,
+				}
+				return tpl(template, data, out)
+			}
 			return printRelease(out, res)
 		},
 	}
 
-	cmd.Flags().IntVar(&client.Version, "revision", 0, "get the named release with revision")
+	f := cmd.Flags()
+	f.IntVar(&client.Version, "revision", 0, "get the named release with revision")
+	f.StringVar(&template, "template", "", "go template for formatting the output, eg: {{.Release.Name}}")
 
 	cmd.AddCommand(newGetValuesCmd(cfg, out))
 	cmd.AddCommand(newGetManifestCmd(cfg, out))
diff --git a/cmd/helm/get_test.go b/cmd/helm/get_test.go
index 21eba28e1..6fc7d6e32 100644
--- a/cmd/helm/get_test.go
+++ b/cmd/helm/get_test.go
@@ -28,6 +28,11 @@ func TestGetCmd(t *testing.T) {
 		cmd:    "get thomas-guide",
 		golden: "output/get-release.txt",
 		rels:   []*release.Release{release.Mock(&release.MockReleaseOptions{Name: "thomas-guide"})},
+	}, {
+		name:   "get with a formatted release",
+		cmd:    "get elevated-turkey --template {{.Release.Chart.Metadata.Version}}",
+		golden: "output/get-release-template.txt",
+		rels:   []*release.Release{release.Mock(&release.MockReleaseOptions{Name: "elevated-turkey"})},
 	}, {
 		name:      "get requires release name arg",
 		cmd:       "get",
diff --git a/cmd/helm/testdata/output/get-release-template.txt b/cmd/helm/testdata/output/get-release-template.txt
new file mode 100644
index 000000000..02d44fb01
--- /dev/null
+++ b/cmd/helm/testdata/output/get-release-template.txt
@@ -0,0 +1 @@
+0.1.0-beta.1
\ No newline at end of file