internal/task: include date in vscode-go github release note

For golang/vscode-go#3500

Change-Id: I24844b96621d641cbb50378ea7a4adbdd38975f4
Reviewed-on: https://go-review.googlesource.com/c/build/+/617477
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

internal/task/releasevscodego.go

@@ -498,6 +498,8 @@ func vsixFileName(release releaseVersion, prerelease string) string {
 // vscodeGoReleaseData holds data for the "vscode-go" extension release notes
 // template.
 type vscodeGoReleaseData struct {
+	Date string
+
 	// PreviousTag and CurrentTag are tags used to show the differences between
 	// the current release and the previous one.
 	PreviousTag string
@@ -612,6 +614,7 @@ See release https://github.com/golang/vscode-go/releases/tag/%s for details.`
 
 		nextStable := releaseVersion{Major: release.Major, Minor: release.Minor + 1, Patch: 0}.String()
 		data = vscodeGoReleaseData{
+			Date:        time.Now().Format(time.DateOnly),
 			CurrentTag:  current,
 			PreviousTag: previous,
 			// For insider version, the milestone will point to the next stable minor.
@@ -636,6 +639,7 @@ See release https://github.com/golang/vscode-go/releases/tag/%s for details.`
 		}
 
 		data = vscodeGoReleaseData{
+			Date:        time.Now().Format(time.DateOnly),
 			CurrentTag:  current,
 			PreviousTag: previous,
 			Milestone:   release.String(),

internal/task/releasevscodego_test.go

@@ -688,12 +688,17 @@ CHANGE FOR v0.42.0 LINE 2
 				Gerrit: gerrit,
 			}
 
-			got, err := tasks.vscodeGoGitHubReleaseBody(ctx, tc.release, tc.prerelease)
+			gotBody, err := tasks.vscodeGoGitHubReleaseBody(ctx, tc.release, tc.prerelease)
 			if err != nil {
 				t.Fatal(err)
 			}
 
-			if diff := cmp.Diff(testdataFile(t, tc.wantContent), got); diff != "" {
+
+			re := regexp.MustCompile(`Date: (.*)\n`)
+			want := re.ReplaceAllString(testdataFile(t, tc.wantContent), "\n")
+			got := re.ReplaceAllString(string(gotBody), "\n")
+
+			if diff := cmp.Diff(want, got); diff != "" {
 				t.Errorf("body text mismatch (-want +got):\n%s", diff)
 			}
 		})

internal/task/template/vscode-go-release-note.md

@@ -2,6 +2,9 @@
 This is the [pre-release version](https://code.visualstudio.com/api/working-with-extensions/publishing-extension#prerelease-extensions) of {{ .NextStable }}.
 
 {{ end -}}
+
+Date: {{ .Date }}
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/{{.PreviousTag}}...{{.CurrentTag}}
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3A{{.Milestone}}
 {{- if .Body }}

internal/task/testdata/vscode-go-next-insider-minor.md

@@ -1,5 +1,7 @@
 This is the [pre-release version](https://code.visualstudio.com/api/working-with-extensions/publishing-extension#prerelease-extensions) of v0.44.0.
 
+Date: 2002-01-02
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/v0.42.0-rc.1...v0.43.0
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.44.0
 

internal/task/testdata/vscode-go-next-insider-patch.md

@@ -1,5 +1,7 @@
 This is the [pre-release version](https://code.visualstudio.com/api/working-with-extensions/publishing-extension#prerelease-extensions) of v0.44.0.
 
+Date: 2002-01-02
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/v0.42.0-rc.1...v0.43.4
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.44.0
 

internal/task/testdata/vscode-go-next-stable-minor.md

@@ -1,3 +1,5 @@
+Date: 2002-01-02
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/v0.42.1...v0.44.0
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.44.0
 

internal/task/testdata/vscode-go-next-stable-patch.md

@@ -1,2 +1,4 @@
+Date: 2002-01-02
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/v0.42.1...v0.42.2
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.42.2

internal/task/testdata/vscode-go-rc-next-stable-minor.md

@@ -1,3 +1,5 @@
+Date: 2002-01-02
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/v0.42.1...v0.44.0-rc.4
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.44.0
 

internal/task/testdata/vscode-go-rc-next-stable-patch.md

@@ -1,3 +1,5 @@
+Date: 2002-01-02
+
 **Full Changelog**: https://github.com/golang/vscode-go/compare/v0.42.1...v0.42.2-rc.3
 **Milestone**: https://github.com/golang/vscode-go/issues?q=milestone%3Av0.42.2