nix: remove XDG_DATA_DIR env reference (#673)

using symlinkJoin instead

Author: Aylur

cmd/types.go

@@ -59,18 +59,6 @@ func init() {
 	f.MarkHidden("tsconfig")
 }
 
-func girDirectories() []string {
-	dataDirs := append([]string{
-		"/usr/local/share",
-		"/usr/share",
-		"/usr/share/*",
-	}, strings.Split(os.Getenv("NIX_GI_DIRS"), ":")...)
-
-	return lib.Map(dataDirs, func(dir string) string {
-		return filepath.Join(dir, "gir-1.0")
-	})
-}
-
 func spinner(stopChan chan bool) {
 	chars := []string{"⣾", "⣽", "⣻", "⢿", "⡿", "⣟", "⣯", "⣷"}
 
@@ -110,7 +98,13 @@ func genTypes(configDir, pattern string, verbose bool) {
 		"--outdir", filepath.Join(configDir, "@girs"),
 	}
 
-	for _, path := range girDirectories() {
+	dataDirs := append([]string{
+		"/usr/local/share/gir-1.0",
+		"/usr/share/gir-1.0",
+		"/usr/share/*/gir-1.0",
+	}, strings.Split(os.Getenv("EXTRA_GIR_DIRS"), ":")...)
+
+	for _, path := range dataDirs {
 		flags = append(flags, "-g", path)
 	}
 

nix/default.nix

@@ -1,11 +1,11 @@
 {
+  symlinkJoin,
   astal3,
   astal4,
   gtk4-layer-shell,
   astal-io,
   astal-gjs,
   lib,
-  writers,
   buildGoModule,
   wrapGAppsHook,
   gobject-introspection,
@@ -18,27 +18,42 @@
   extraPackages ? [],
 }: let
   inherit (builtins) replaceStrings readFile;
+  version = replaceStrings ["\n"] [""] (readFile ../version);
+  pname = "ags";
 
-  datadirs = writers.writeNu "datadirs" ''
-    $env.XDG_DATA_DIRS
-    | split row ":"
-    | filter { $"($in)/gir-1.0" | path exists }
-    | str join ":"
-  '';
+  buildInputs =
+    extraPackages
+    ++ [
+      glib
+      astal-io
+      astal3
+      astal4
+      gobject-introspection # needed for type generation
+    ];
 
   bins = [
     gjs
     nodejs
     dart-sass
     blueprint-compiler
-    astal-io # FIXME: should not be needed after the astal commends are properly implemented using dbus in astal.go
+    astal-io # FIXME: should not be needed after the astal commands are properly implemented using dbus in astal.go
   ];
 
-  version = replaceStrings ["\n"] [""] (readFile ../version);
-  pname = "ags";
+  girDirs = let
+    # gir files are usually in `dev` output.
+    # `propagatedBuildInputs` are also available in the gjs runtime
+    # so we also want to generate types for these.
+    depsOf = pkg:
+      [(pkg.dev or pkg)]
+      ++ (map depsOf (pkg.propagatedBuildInputs or []));
+  in
+    symlinkJoin {
+      name = "gir-dirs";
+      paths = lib.flatten (map depsOf buildInputs);
+    };
 in
   buildGoModule {
-    inherit pname version;
+    inherit pname version buildInputs;
 
     src = builtins.path {
       name = "${pname}-${version}";
@@ -54,18 +69,9 @@ in
       installShellFiles
     ];
 
-    buildInputs =
-      extraPackages
-      ++ [
-        glib
-        astal-io
-        astal3
-        astal4
-      ];
-
     preFixup = ''
       gappsWrapperArgs+=(
-        --prefix NIX_GI_DIRS : "$(${datadirs})"
+        --prefix EXTRA_GIR_DIRS : "${girDirs}/share/gir-1.0"
         --prefix PATH : "${lib.makeBinPath (bins ++ extraPackages)}"
       )
     '';