Fix mixin expansion in compiled templates and adjust include resolution

build.zig.zon

@@ -1,6 +1,6 @@
 .{
     .name = .pugz,
-    .version = "0.3.8",
+    .version = "0.3.9",
     .fingerprint = 0x822db0790e17621d, // Changing this has security and trust implications.
     .minimum_zig_version = "0.15.2",
     .dependencies = .{},

src/compile_tpls.zig

@@ -207,14 +207,17 @@ fn compileSingleFile(
     // Parse template with full resolution (handles includes, extends, mixins)
     const final_ast = try engine.parseTemplate(arena_allocator, template_name, registry);
 
+    // Expand mixin calls into concrete AST nodes for codegen
+    const expanded_ast = try mixin.expandMixins(arena_allocator, final_ast, registry);
+
     // Extract field names
-    const fields = try zig_codegen.extractFieldNames(arena_allocator, final_ast);
+    const fields = try zig_codegen.extractFieldNames(arena_allocator, expanded_ast);
 
     // Generate Zig code
     var codegen = zig_codegen.Codegen.init(arena_allocator);
     defer codegen.deinit();
 
-    const zig_code = try codegen.generate(final_ast, "render", fields);
+    const zig_code = try codegen.generate(expanded_ast, "render", fields);
 
     // Create flat filename from views-relative path to avoid collisions
     // e.g., "pages/404.pug" → "pages_404.zig"

src/tpl_compiler/main.zig

@@ -114,12 +114,15 @@ fn compileSingleFile(allocator: mem.Allocator, input_path: []const u8, output_pa
 
     // Parse template with full resolution (handles includes, extends, mixins)
     const final_ast = try engine.parseTemplate(allocator, template_name, &registry);
+
+    // Expand mixin calls into concrete AST nodes for codegen
+    const expanded_ast = try mixin.expandMixins(allocator, final_ast, &registry);
     // Note: Don't free final_ast as it's managed by the ViewEngine
     // The normalized_source is intentionally leaked as AST strings point into it
     // Both will be cleaned up by the allocator when the CLI exits
 
     // Extract field names from final resolved AST
-    const fields = try zig_codegen.extractFieldNames(allocator, final_ast);
+    const fields = try zig_codegen.extractFieldNames(allocator, expanded_ast);
     defer {
         for (fields) |field| allocator.free(field);
         allocator.free(fields);
@@ -139,7 +142,7 @@ fn compileSingleFile(allocator: mem.Allocator, input_path: []const u8, output_pa
     var codegen = Codegen.init(allocator);
     defer codegen.deinit();
 
-    const zig_code = try codegen.generate(final_ast, function_name, fields);
+    const zig_code = try codegen.generate(expanded_ast, function_name, fields);
     defer allocator.free(zig_code);
 
     // Write output file

src/view_engine.zig

@@ -280,8 +280,7 @@ pub const ViewEngine = struct {
 
     /// Resolves a path relative to the current file's directory.
     /// - Paths starting with "/" are absolute from views_dir root
-    /// - Paths starting with "./" or "../" are relative to current file's directory
+    /// - Other paths are relative to current file's directory (if provided)
-    /// - Other paths are relative to views_dir root (Pug convention)
     /// Returns a path relative to views_dir.
     fn resolveRelativePath(self: *const ViewEngine, allocator: std.mem.Allocator, path: []const u8, current_dir: ?[]const u8) ![]const u8 {
         _ = self;
@@ -291,14 +290,6 @@ pub const ViewEngine = struct {
             return allocator.dupe(u8, path[1..]);
         }
 
-        // Check if path is explicitly relative (starts with "./" or "../")
-        const is_explicit_relative = std.mem.startsWith(u8, path, "./") or std.mem.startsWith(u8, path, "../");
-
-        // If not explicitly relative, treat as relative to views_dir root (Pug convention)
-        if (!is_explicit_relative) {
-            return allocator.dupe(u8, path);
-        }
-
         // If no current directory (top-level call), path is already relative to views_dir
         const dir = current_dir orelse {
             return allocator.dupe(u8, path);
@@ -455,15 +446,15 @@ test "resolveRelativePath - relative paths from subdirectory" {
     defer allocator.free(result3);
     try std.testing.expectEqualStrings("pages/utils", result3);
 
-    // From pages/, include header (no ./) -> header (relative to views root, Pug convention)
+    // From pages/, include header (no ./) -> pages/header (relative to current dir)
     const result4 = try engine.resolveRelativePath(allocator, "header", "pages");
     defer allocator.free(result4);
-    try std.testing.expectEqualStrings("header", result4);
+    try std.testing.expectEqualStrings("pages/header", result4);
 
-    // From pages/, include includes/partial -> includes/partial (relative to views root)
+    // From pages/, include includes/partial -> pages/includes/partial (relative to current dir)
     const result5 = try engine.resolveRelativePath(allocator, "includes/partial", "pages");
     defer allocator.free(result5);
-    try std.testing.expectEqualStrings("includes/partial", result5);
+    try std.testing.expectEqualStrings("pages/includes/partial", result5);
 }
 
 test "resolveRelativePath - absolute paths from views root" {