Ignore vendor folder with mod=readonly

README.md

@@ -42,6 +42,8 @@ The `xcaddy` command will use the latest version of Caddy by default. You can cu
 
 As usual with `go` command, the `xcaddy` command will pass the `GOOS`, `GOARCH`, and `GOARM` environment variables through for cross-compilation.
 
+Note that `xcaddy` will ignore the `vendor/` folder with `-mod=readonly`.
+
 
 ### Custom builds
 

cmd/main.go

@@ -183,7 +183,7 @@ func runDev(ctx context.Context, args []string) error {
 	// and since this tool is a carry-through for the user's actual
 	// go.mod, we need to transfer their replace directives through
 	// to the one we're making
-	cmd := exec.Command(utils.GetGo(), "list", "-m", "-json", "all")
+	cmd := exec.Command(utils.GetGo(), "list", "-mod=readonly", "-m", "-json", "all")
 	cmd.Stderr = os.Stderr
 	out, err := cmd.Output()
 	if err != nil {
@@ -318,7 +318,7 @@ func parseGoListJson(out []byte) (currentModule, moduleDir string, replacements
 	for _, idx := range unjoinedReplaces {
 		unresolved := string(replacements[idx].New)
 		resolved := filepath.Join(moduleDir, unresolved)
-		log.Printf("[INFO] Resolved relative replacement %s to %s", unresolved, resolved)
+		log.Printf("[INFO] Resolved previously-unjoined relative replacement %s to %s", unresolved, resolved)
 		replacements[idx].New = xcaddy.ReplacementPath(resolved)
 	}
 	return