lib: make toHyprconf support strings and attrs in sections

Adds support for

    section = [
      "abc"
      { a = 123; }
    ];

Which gets generated to

    section=abc

    section {
      a=123
    }

This is very useful with the new windowrule syntax, where you can
create anonymous window rules as strings and named rules as attribute
sets. See <https://wiki.hypr.land/Configuring/Window-Rules/>.

modules/lib/generators.nix

@@ -21,6 +21,7 @@
         isList
         mapAttrsToList
         replicate
+        attrNames
         ;
 
       initialIndent = concatStrings (replicate indentLevel "  ");
@@ -28,31 +29,36 @@
       toHyprconf' =
         indent: attrs:
         let
-          sections = filterAttrs (n: v: isAttrs v || (isList v && all isAttrs v)) attrs;
+          isImportantField =
+            n: _: foldl (acc: prev: if hasPrefix prev n then true else acc) false importantPrefixes;
+          importantFields = filterAttrs isImportantField attrs;
+          withoutImportantFields = fields: removeAttrs fields (attrNames importantFields);
+
+          allSections = filterAttrs (n: v: isAttrs v || isList v) attrs;
+          sections = withoutImportantFields allSections;
 
           mkSection =
             n: attrs:
-            if lib.isList attrs then
-              (concatMapStringsSep "\n" (a: mkSection n a) attrs)
-            else
+            if isList attrs then
+              let
+                separator = if all isAttrs attrs then "\n" else "";
+              in
+              (concatMapStringsSep separator (a: mkSection n a) attrs)
+            else if isAttrs attrs then
               ''
                 ${indent}${n} {
                 ${toHyprconf' "  ${indent}" attrs}${indent}}
-              '';
+              ''
+            else
+              toHyprconf' indent { ${n} = attrs; };
 
           mkFields = generators.toKeyValue {
             listsAsDuplicateKeys = true;
             inherit indent;
           };
 
-          allFields = filterAttrs (n: v: !(isAttrs v || (isList v && all isAttrs v))) attrs;
-
-          isImportantField =
-            n: _: foldl (acc: prev: if hasPrefix prev n then true else acc) false importantPrefixes;
-
-          importantFields = filterAttrs isImportantField allFields;
-
-          fields = builtins.removeAttrs allFields (mapAttrsToList (n: _: n) importantFields);
+          allFields = filterAttrs (n: v: !(isAttrs v || isList v)) attrs;
+          fields = withoutImportantFields allFields;
         in
         mkFields importantFields
         + concatStringsSep "\n" (mapAttrsToList mkSection sections)

tests/lib/generators/default.nix

@@ -1,4 +1,5 @@
 {
+  generators-hyprconf = ./tohyprconf.nix;
   generators-tokdl = ./tokdl.nix;
   generators-toscfg-empty = ./toscfg-empty.nix;
   generators-toscfg-example = ./toscfg-example.nix;

tests/lib/generators/tohyprconf-result.txt

@@ -0,0 +1,93 @@
+$important=123
+attrs-section {
+  bool=true
+  float=0.800000
+  int=5
+  null=null
+  string=abc
+}
+
+combined-attrs-nested-section {
+  a {
+    a=123
+  }
+
+  a {
+    b=123
+  }
+
+  a {
+    c=123
+  }
+
+  b {
+    a=123
+  }
+
+  b {
+    b=123
+  }
+
+  b {
+    c=123
+  }
+}
+
+combined-list-nested-section {
+  b {
+    c {
+      abc=123
+    }
+  }
+}
+
+combined-list-nested-section {
+  bar {
+    baz {
+      aaa=111
+    }
+  }
+}
+
+list-section=foo
+list-section=bar
+list-section=baz
+
+list-with-strings-and-attrs=abc
+list-with-strings-and-attrs {
+  a=123
+}
+list-with-strings-and-attrs=foo
+list-with-strings-and-attrs {
+  b=321
+}
+
+nested-attrs-section {
+  a {
+    b {
+      c {
+        abc=123
+      }
+    }
+  }
+
+  foo {
+    bar {
+      baz {
+        aaa=111
+      }
+    }
+  }
+}
+
+nested-list-section {
+  a=123
+}
+
+nested-list-section {
+  b=123
+}
+
+nested-list-section {
+  c=123
+}

tests/lib/generators/tohyprconf.nix

@@ -0,0 +1,70 @@
+{ lib, ... }:
+
+{
+  home.file."tohyprconf-result.txt".text = lib.hm.generators.toHyprconf {
+    attrs = rec {
+      "$important" = 123;
+
+      list-section = [
+        "foo"
+        "bar"
+        "baz"
+      ];
+
+      attrs-section = {
+        string = "abc";
+        int = 5;
+        float = 0.8;
+        bool = true;
+        null = null;
+      };
+
+      nested-attrs-section = {
+        a = {
+          b = {
+            c = {
+              abc = 123;
+            };
+          };
+        };
+
+        foo = {
+          bar = {
+            baz = {
+              aaa = 111;
+            };
+          };
+        };
+      };
+
+      nested-list-section = [
+        { a = 123; }
+        { b = 123; }
+        { c = 123; }
+      ];
+
+      combined-list-nested-section = [
+        nested-attrs-section.a
+        nested-attrs-section.foo
+      ];
+
+      combined-attrs-nested-section = {
+        a = nested-list-section;
+        b = nested-list-section;
+      };
+
+      list-with-strings-and-attrs = [
+        "abc"
+        { a = 123; }
+        "foo"
+        { b = 321; }
+      ];
+    };
+  };
+
+  nmt.script = ''
+    assertFileContent \
+      home-files/tohyprconf-result.txt \
+      ${./tohyprconf-result.txt}
+  '';
+}

tests/modules/services/hyprland/multiple-devices-config.conf

@@ -13,6 +13,10 @@ animations {
   enabled=true
 }
 
+bindm=$mod, mouse:272, movewindow
+bindm=$mod, mouse:273, resizewindow
+bindm=$mod ALT, mouse:272, resizewindow
+
 decoration {
   col.shadow=rgba(00000099)
   shadow_offset=0 5
@@ -45,9 +49,6 @@ plugin {
     dummy=plugin setting
   }
 }
-bindm=$mod, mouse:272, movewindow
-bindm=$mod, mouse:273, resizewindow
-bindm=$mod ALT, mouse:272, resizewindow
 # window resize
 bind = $mod, S, submap, resize
 

tests/modules/services/hyprland/simple-config.conf

@@ -13,6 +13,10 @@ animations {
   enabled=true
 }
 
+bindm=$mod, mouse:272, movewindow
+bindm=$mod, mouse:273, resizewindow
+bindm=$mod ALT, mouse:272, resizewindow
+
 decoration {
   col.shadow=rgba(00000099)
   shadow_offset=0 5
@@ -48,9 +52,6 @@ plugin {
     dummy=plugin setting
   }
 }
-bindm=$mod, mouse:272, movewindow
-bindm=$mod, mouse:273, resizewindow
-bindm=$mod ALT, mouse:272, resizewindow
 # window resize
 bind = $mod, S, submap, resize
 

tests/modules/services/hyprland/sourceFirst-false-config.conf

@@ -10,4 +10,5 @@ input {
   follow_mouse=1
   kb_layout=ro
 }
+
 source=sourced.conf

tests/modules/services/hyprland/submaps-config.conf

@@ -17,6 +17,7 @@ submap = reset
 submap = resize
 bind=, escape, submap, reset
 bind=, return, submap, reset
+
 binde=, right, resizeactive, 10 0
 binde=, left, resizeactive, -10 0
 binde=, up, resizeactive, 0 -10

tests/modules/services/hyprpaper/hyprpaper.conf

@@ -1,7 +1,8 @@
-ipc=on
 preload=/share/wallpapers/buttons.png
 preload=/share/wallpapers/cat_pacman.png
-splash=false
-splash_offset=2.000000
+
 wallpaper=DP-3,/share/wallpapers/buttons.png
 wallpaper=DP-1,/share/wallpapers/cat_pacman.png
+ipc=on
+splash=false
+splash_offset=2.000000