From 6670513b2fa538b193cf69a432e3f45d3d61a2bc Mon Sep 17 00:00:00 2001
From: Eric Joldasov <bratishkaerik@landless-city.net>
Date: Thu, 30 Jan 2025 21:53:07 +0500
Subject: [PATCH] [WIP] move from `mustache-zig` to `ztl` templates

Hitting some critical bugs right now, that's why it's draft.

Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
---
 share/templates/gentoo.ebuild.ztl | 40 +++++++++++++++++++++++++++++++
 src/main.zig                      | 40 +++++++++++++++++++------------
 2 files changed, 65 insertions(+), 15 deletions(-)
 create mode 100644 share/templates/gentoo.ebuild.ztl

diff --git a/share/templates/gentoo.ebuild.ztl b/share/templates/gentoo.ebuild.ztl
new file mode 100644
index 0000000..9e2815d
--- /dev/null
+++ b/share/templates/gentoo.ebuild.ztl
@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: 2024 BratishkaErik
+// SPDX-License-Identifier: 0BSD
+// 
+// Text above is about this template, not generated file itself.
+// 
+// Text below is just an example for more easy generation of ebuilds
+// for ::gentoo and ::guru repos, you can relicense this output however you want.
+# Copyright <%= @year %> Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# Generated by zig-ebuilder <%= @generator_version %>
+
+EAPI=8
+
+DESCRIPTION="Write manually"
+HOMEPAGE="Write manually"
+
+ZIG_SLOT="<%= @zbs["slot"] %>"
+inherit zig
+
+src_configure() {
+	local my_zbs_args=(
+		# Here you have list of options that are exposed by build.zig,
+		# pass USE flags and default values here.
+
+		<% foreach (@zbs["report"]["user_options"]) |user_option| { %>
+		# <%= user_option["name"] %>: <%= user_option["description"] %>
+		<%- } %>
+
+		<% foreach (@zbs["report"]["user_options"]) |user_option| { %>
+		# -D<%= user_option["name"] %>=[<%= user_option["type"] %>]
+		<%- } %>
+
+		<% foreach (@zbs["report"]["system_integrations"]) |system_integration| { %>
+		-fsys=<%= system_integration %>
+		<%- } %>
+    )
+
+    zig_src_configure
+}
diff --git a/src/main.zig b/src/main.zig
index e6e5129..160832b 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -3,7 +3,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 const std = @import("std");
-const mustache = @import("mustache");
+const ztl = @import("ztl");
 
 const BuildZigZon = @import("BuildZigZon.zig");
 const Dependencies = @import("Dependencies.zig");
@@ -247,26 +247,25 @@ pub fn main() !void {
             return error.InvalidTemplate;
         }
     else
-        generator_setup.templates.dir.readFileAlloc(gpa, "gentoo.ebuild.mustache", 1 * 1024 * 1024) catch |err| {
+        generator_setup.templates.dir.readFileAlloc(gpa, "gentoo.ebuild.ztl", 1 * 1024 * 1024) catch |err| {
             file_searching_events.err(@src(), "Error when searching default \"gentoo\" template: \"{s}\".", .{@errorName(err)});
 
             return error.InvalidTemplate;
         };
     defer gpa.free(template_text);
 
-    const template = switch (try mustache.parseText(gpa, template_text, .{}, .{ .copy_strings = false })) {
-        .parse_error => |detail| {
-            file_searching_events.err(@src(), "Error when loading file: {s} caused by \"{s}\" at {d}:{d}.", .{
-                @errorName(detail.parse_error),
-                if (optional_custom_template_path) |custom_template_path| custom_template_path else "(default template)",
-                detail.lin,
-                detail.col,
-            });
-            return error.InvalidTemplate;
-        },
-        .success => |template| template,
+    var template: ztl.Template(void) = .init(gpa, {});
+    defer template.deinit();
+
+    var template_errors: ztl.CompileErrorReport = .{};
+    template.compile(template_text, .{ .error_report = &template_errors }) catch |err| {
+        file_searching_events.err(@src(), "Error when loading file: {s} caused by \"{s}\": {}", .{
+            @errorName(err),
+            if (optional_custom_template_path) |custom_template_path| custom_template_path else "(default template)",
+            template_errors,
+        });
+        return error.InvalidTemplate;
     };
-    defer template.deinit(gpa);
 
     const dependencies: Dependencies = if (global.fetch_mode != .skip) fetch: {
         const build_zig_zon_loc = if (project_setup.build_zig_zon) |build_zig_zon| build_zig_zon else {
@@ -361,7 +360,18 @@ pub fn main() !void {
     defer gpa.free(context.generator_version);
 
     main_log.info(@src(), "Writing generated ebuild to STDOUT...", .{});
-    try mustache.render(template, context, stdout);
+
+    var render_errors: ztl.RenderErrorReport = .{};
+    defer render_errors.deinit();
+
+    template.render(stdout, context, .{ .error_report = &render_errors }) catch |err| {
+        file_searching_events.err(@src(), "Error when rendering template: {s} caused by: {}", .{
+            @errorName(err),
+            render_errors,
+        });
+        return error.InvalidTemplate;
+    };
+
     main_log.info(@src(), "Generated ebuild was written to STDOUT.", .{});
     main_log.info(@src(), "Note (if using default template): license header there (with \"Gentoo Authors\" and GNU GPLv2) is just an convenience default for making ebuilds for ::gentoo and ::guru repos easier, you can relicense output however you want.", .{});