gqlgenc: add versionCheckHook

pkgs/by-name/gq/gqlgenc/fix-version.patch

@@ -0,0 +1,11 @@
+--- a/main.go
++++ b/main.go
+@@ -9,7 +9,7 @@
+ 	"github.com/urfave/cli/v2"
+ )
+ 
+-const version = "0.31.0"
++var version string
+ 
+ var versionCmd = &cli.Command{
+ 	Name:  "version",

pkgs/by-name/gq/gqlgenc/package.nix

@@ -2,6 +2,7 @@
   buildGoModule,
   fetchFromGitHub,
   lib,
+  versionCheckHook,
 }:
 
 buildGoModule rec {
@@ -15,10 +16,27 @@ buildGoModule rec {
     sha256 = "sha256-AGbE+R3502Igl4/HaN8yvFVJBsKQ6iVff8IEvddJLEo=";
   };
 
+  patches = [
+    ./fix-version.patch
+  ];
+
   excludedPackages = [ "example" ];
 
   vendorHash = "sha256-kBv9Kit5KdPB48V/g1OaeB0ABFd1A1I/9F5LaQDWxUE=";
 
+  ldflags = [
+    "-X"
+    "main.version=${version}"
+  ];
+
+  doInstallCheck = true;
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  versionCheckProgramArg = "version";
+
+  # FAIL: TestLoadConfig_LoadSchema/correct_schema
+  # panic: httptest: failed to listen on a port: listen tcp6 [::1]:0: bind: operation not permitted
+  __darwinAllowLocalNetworking = true;
+
   meta = with lib; {
     description = "Go tool for building GraphQL client with gqlgen";
     mainProgram = "gqlgenc";