From b93b0e62c9cf98a99ab84f62be3075b81a2ad3e1 Mon Sep 17 00:00:00 2001
From: Joshua Bronson <joshua.bronson@chicagotrading.com>
Date: Mon, 25 May 2026 10:24:43 -0500
Subject: [PATCH] fix(gazelle): guard against nil proto config in loadConfig

proto.GetProtoConfig() returns nil when the proto Gazelle language
is not loaded alongside buf. Guard the return value to prevent a
nil pointer dereference panic.

Fixes #147
---
 gazelle/buf/config.go | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/gazelle/buf/config.go b/gazelle/buf/config.go
index c1f45f4..884619b 100644
--- a/gazelle/buf/config.go
+++ b/gazelle/buf/config.go
@@ -113,17 +113,21 @@ func loadConfig(gazelleConfig *config.Config, packageRelativePath string, file *
 	// Here we set the config if the directive is not present
 	if config.ModuleRoot && packageRelativePath != "" {
 		protoConfig := proto.GetProtoConfig(gazelleConfig)
-		stripImportPrefix := "/" + packageRelativePath
-		if protoConfig.StripImportPrefix == "" {
-			protoConfig.StripImportPrefix = stripImportPrefix
-		}
-		if protoConfig.StripImportPrefix != stripImportPrefix {
-			log.Printf(
-				"strip_import_prefix at %s should be %s but is %s",
-				packageRelativePath,
-				stripImportPrefix,
-				protoConfig.StripImportPrefix,
-			)
+		if protoConfig == nil {
+			log.Print("buf: proto language is not enabled; skipping strip_import_prefix configuration")
+		} else {
+			stripImportPrefix := "/" + packageRelativePath
+			if protoConfig.StripImportPrefix == "" {
+				protoConfig.StripImportPrefix = stripImportPrefix
+			}
+			if protoConfig.StripImportPrefix != stripImportPrefix {
+				log.Printf(
+					"strip_import_prefix at %s should be %s but is %s",
+					packageRelativePath,
+					stripImportPrefix,
+					protoConfig.StripImportPrefix,
+				)
+			}
 		}
 	}
 	if file == nil {