From 75cfb36608a3457f182eb3284d99cd677f463dcb Mon Sep 17 00:00:00 2001
From: Roland Shoemaker <roland@golang.org>
Date: Thu, 11 Dec 2025 18:09:46 -0500
Subject: [PATCH] cmd/go: add VCS telemetry counter

Change-Id: I601b842f8690f723682dccca0df778f124ac99a6
Reviewed-on: https://go-review.googlesource.com/c/go/+/729500
Auto-Submit: Roland Shoemaker <roland@golang.org>
Reviewed-by: Hongxiang Jiang <hxjiang@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
---
 src/cmd/go/internal/vcs/vcs.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/cmd/go/internal/vcs/vcs.go b/src/cmd/go/internal/vcs/vcs.go
index 0822844127..26b103b1d0 100644
--- a/src/cmd/go/internal/vcs/vcs.go
+++ b/src/cmd/go/internal/vcs/vcs.go
@@ -27,6 +27,7 @@ import (
 	"cmd/go/internal/str"
 	"cmd/go/internal/web"
 	"cmd/internal/pathcache"
+	"cmd/internal/telemetry/counter"
 
 	"golang.org/x/mod/module"
 )
@@ -872,6 +873,12 @@ func RepoRootForImportPath(importPath string, mod ModuleMode, security web.Secur
 		rr = nil
 		err = importErrorf(importPath, "cannot expand ... in %q", importPath)
 	}
+
+	// Record telemetry about which VCS was used.
+	if err == nil {
+		counter.Inc("go/vcs:" + rr.VCS.Name)
+	}
+
 	return rr, err
 }