From 7b605f471d9c0aa0acd165f72e32f0897fc6eece Mon Sep 17 00:00:00 2001
From: Jamal Carvalho <jamal@golang.org>
Date: Wed, 20 Jul 2022 18:49:20 +0000
Subject: [PATCH] gopls/internal/vulncheck: pass go version to vulncheck config

For golang/go#53869

Change-Id: I8c34adaf81415dafb724ca67fa731912832c3ee5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/418538
Run-TryBot: Jamal Carvalho <jamal@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
---
 gopls/internal/vulncheck/command.go |  2 +-
 gopls/internal/vulncheck/util.go    | 16 ++++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/gopls/internal/vulncheck/command.go b/gopls/internal/vulncheck/command.go
index 53bf0f0386..a29bc008c7 100644
--- a/gopls/internal/vulncheck/command.go
+++ b/gopls/internal/vulncheck/command.go
@@ -84,7 +84,7 @@ func (c *cmd) Run(ctx context.Context, cfg *packages.Config, patterns ...string)
 
 	log.Printf("analyzing %d packages...\n", len(loadedPkgs))
 
-	r, err := vulncheck.Source(ctx, loadedPkgs, &vulncheck.Config{Client: c.Client})
+	r, err := vulncheck.Source(ctx, loadedPkgs, &vulncheck.Config{Client: c.Client, SourceGoVersion: goVersion()})
 	if err != nil {
 		return nil, err
 	}
diff --git a/gopls/internal/vulncheck/util.go b/gopls/internal/vulncheck/util.go
index c329461894..05332d375c 100644
--- a/gopls/internal/vulncheck/util.go
+++ b/gopls/internal/vulncheck/util.go
@@ -8,8 +8,11 @@
 package vulncheck
 
 import (
+	"bytes"
 	"fmt"
 	"go/token"
+	"os"
+	"os/exec"
 
 	gvc "golang.org/x/tools/gopls/internal/govulncheck"
 	"golang.org/x/tools/internal/lsp/protocol"
@@ -80,3 +83,16 @@ func posToPosition(pos *token.Position) (p protocol.Position) {
 	}
 	return p
 }
+
+func goVersion() string {
+	if v := os.Getenv("GOVERSION"); v != "" {
+		// Unlikely to happen in practice, mostly used for testing.
+		return v
+	}
+	out, err := exec.Command("go", "env", "GOVERSION").Output()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "failed to determine go version; skipping stdlib scanning: %v\n", err)
+		return ""
+	}
+	return string(bytes.TrimSpace(out))
+}