Go: add vendor update to //go:gen

go/BUILD.bazel

@@ -1,15 +1,17 @@
 load("@bazel_skylib//rules:native_binary.bzl", "native_binary")
 load("@gazelle//:def.bzl", "gazelle")
 load("@rules_pkg//pkg:install.bzl", "pkg_install")
-load("@rules_pkg//pkg:mappings.bzl", "pkg_filegroup", "pkg_files")
+load("@rules_pkg//pkg:mappings.bzl", "pkg_attributes", "pkg_filegroup", "pkg_files")
 load("//:defs.bzl", "codeql_platform")
 
 gazelle(
-    name = "_gazelle",
+    name = "gazelle",
+    extra_args = ["go/extractor"],
 )
 
 _gen_binaries = [
-    ":_gazelle",
+    "@rules_go//go",
+    ":gazelle",
     "//go/extractor/cli/go-gen-dbscheme",
 ]
 
@@ -62,6 +64,7 @@ pkg_files(
         "//go/extractor/cli/go-gen-dbscheme",
         "//go/extractor/cli/go-tokenizer",
     ],
+    attributes = pkg_attributes(mode = "0755"),
     prefix = "tools/" + codeql_platform,
     visibility = ["//visibility:public"],
 )

go/extractor/vendor/modules.txt

@@ -1,3 +1,4 @@
+## workspace
 # golang.org/x/mod v0.15.0
 ## explicit; go 1.18
 golang.org/x/mod/internal/lazyregexp

go/gen.py

@@ -7,14 +7,17 @@ this = pathlib.Path(__file__).resolve()
 go_extractor_dir = this.parent / "extractor"
 go_dbscheme = this.parent / "ql" / "lib" / "go.dbscheme"
 r = runfiles.Create()
-gazelle, go_gen_dbscheme = map(r.Rlocation, sys.argv[1:])
+go, gazelle, go_gen_dbscheme = map(r.Rlocation, sys.argv[1:])
+
+print("updating vendor")
+subprocess.check_call([go, "-C", go_extractor_dir, "work", "vendor"])
 
 print("clearing generated BUILD files")
 for build_file in go_extractor_dir.glob("*/**/BUILD.bazel"):
     build_file.unlink()
 
 print("running gazelle")
-subprocess.check_call([gazelle, "go/extractor"])
+subprocess.check_call([gazelle])
 
 print("adding header to generated BUILD files")
 for build_file in go_extractor_dir.glob("*/**/BUILD.bazel"):