git: use attrsOf instead of attrs

This makes sure that values added to

    programs.git.aliases

or

    programs.git.extraConfig

are merged as expected.

Also add a few option examples.

modules/programs/git.nix

@@ -6,6 +6,12 @@ let
 
   cfg = config.programs.git;
 
+  gitIniType = with types;
+    let
+      primitiveType = either bool (either int str);
+    in
+      attrsOf (attrsOf primitiveType);
+
   signModule = types.submodule {
     options = {
       key = mkOption {
@@ -80,8 +86,9 @@ in
       };
 
       aliases = mkOption {
-        type = types.attrs;
+        type = types.attrsOf types.str;
         default = {};
+        example = { co = "checkout"; };
         description = "Git aliases to define.";
       };
 
@@ -92,13 +99,16 @@ in
       };
 
       extraConfig = mkOption {
-        type = types.either types.attrs types.lines;
+        type = types.either types.lines gitIniType;
         default = {};
+        example = {
+          core = { whitespace = "trailing-space,space-before-tab"; };
+        };
         description = "Additional configuration to add.";
       };
 
       iniContent = mkOption {
-        type = types.attrsOf types.attrs;
+        type = gitIniType;
         internal = true;
       };
 

tests/modules/programs/git-expected.conf

@@ -1,11 +1,13 @@
 [alias]
 a1=foo
-a2=bar
+a2=baz
 
 [commit]
 gpgSign=true
 
 [extra]
+boolean=true
+integer=38
 name=value
 
 [gpg]

tests/modules/programs/git.nix

@@ -4,7 +4,8 @@ with lib;
 
 {
   config = {
-    programs.git = {
+    programs.git = mkMerge [
+      {
         enable = true;
         aliases = {
           a1 = "foo";
@@ -30,7 +31,14 @@ with lib;
         };
         userEmail = "user@example.org";
         userName = "John Doe";
-    };
+      }
+
+      {
+        aliases.a2 = mkForce "baz";
+        extraConfig.extra.boolean = true;
+        extraConfig.extra.integer = 38;
+      }
+    ];
 
     nmt.script = ''
       assertFileExists home-files/.config/git/config