From 5500e1f4c58b1df8c971d4a55adbba2b00d21240 Mon Sep 17 00:00:00 2001
From: Altagos <jakob@altagos.dev>
Date: Sun, 26 Oct 2025 11:06:05 +0100
Subject: [PATCH] build: setup imgui

---
 .tangled/workflows/build.yml |  2 +-
 build.zig                    | 88 ++++++++++++++++++++++++++----------
 build.zig.zon                |  4 ++
 3 files changed, 68 insertions(+), 26 deletions(-)

diff --git a/.tangled/workflows/build.yml b/.tangled/workflows/build.yml
index ed9ceaf..27ad1f6 100644
--- a/.tangled/workflows/build.yml
+++ b/.tangled/workflows/build.yml
@@ -18,4 +18,4 @@ steps:
       mise exec zig -- zig build test --summary all
   - name: Build ReleaseSafe
     command: |
-      mise exec zig -- zig build -Doptimize=ReleaseSafe
\ No newline at end of file
+      mise exec zig -- zig build -Doptimize=ReleaseSafe -Ddocking
\ No newline at end of file
diff --git a/build.zig b/build.zig
index f64a007..6d059c1 100644
--- a/build.zig
+++ b/build.zig
@@ -1,22 +1,38 @@
 const std = @import("std");
 const Build = std.Build;
+
 const sokol = @import("sokol");
+const cimgui = @import("cimgui");
 
 const Options = struct {
-    mod: *Build.Module,
+    mod_ft: *Build.Module,
+    mod_exe: *Build.Module,
     dep_sokol: *Build.Dependency,
+    dep_cimgui: *Build.Dependency,
+    cimgui_clib_name: []const u8,
 };
 
 pub fn build(b: *std.Build) !void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
+    const opt_docking = b.option(bool, "docking", "Build with docking support") orelse false;
+
+    const cimgui_conf = cimgui.getConfig(opt_docking);
+
     const dep_sokol = b.dependency("sokol", .{
         .target = target,
         .optimize = optimize,
+        .with_sokol_imgui = true,
+    });
+    const dep_cimgui = b.dependency("cimgui", .{
+        .target = target,
+        .optimize = optimize,
     });
 
-    const mod = b.addModule("ft", .{
+    dep_sokol.artifact("sokol_clib").addIncludePath(dep_cimgui.path(cimgui_conf.include_dir));
+
+    const mod_ft = b.addModule("ft", .{
         .root_source_file = b.path("src/root.zig"),
         .target = target,
     });
@@ -26,40 +42,41 @@ pub fn build(b: *std.Build) !void {
         .target = target,
         .optimize = optimize,
         .imports = &.{
-            .{ .name = "ft", .module = mod },
-            .{ .name = "sokol", .module = dep_sokol.module("sokol") },
+            .{ .name = "ft", .module = mod_ft },
+            .{
+                .name = "sokol",
+                .module = dep_sokol.module("sokol"),
+            },
+            .{
+                .name = cimgui_conf.module_name,
+                .module = dep_cimgui.module(cimgui_conf.module_name),
+            },
             // .{ .name = "shader", .module = try createShaderModule(b, dep_sokol) },
         },
     });
 
-    const opts = Options{ .mod = mod_exe, .dep_sokol = dep_sokol };
+    const options_mod_exe = b.addOptions();
+    options_mod_exe.addOption(bool, "docking", opt_docking);
+    mod_exe.addOptions("build_options", options_mod_exe);
+
+    const opts = Options{
+        .mod_ft = mod_ft,
+        .mod_exe = mod_exe,
+        .dep_sokol = dep_sokol,
+        .dep_cimgui = dep_cimgui,
+        .cimgui_clib_name = cimgui_conf.clib_name,
+    };
     if (target.result.cpu.arch.isWasm()) {
         try buildWeb(b, opts);
     } else {
         try buildNative(b, opts);
-
-        const mod_tests = b.addTest(.{
-            .name = "mod tests",
-            .root_module = mod,
-        });
-        const run_mod_tests = b.addRunArtifact(mod_tests);
-
-        const exe_tests = b.addTest(.{
-            .name = "exe tests",
-            .root_module = mod_exe,
-        });
-        const run_exe_tests = b.addRunArtifact(exe_tests);
-
-        const test_step = b.step("test", "Run tests");
-        test_step.dependOn(&run_mod_tests.step);
-        test_step.dependOn(&run_exe_tests.step);
     }
 }
 
 fn buildNative(b: *Build, opts: Options) !void {
     const exe = b.addExecutable(.{
         .name = "factorio_toolbox",
-        .root_module = opts.mod,
+        .root_module = opts.mod_exe,
     });
 
     b.installArtifact(exe);
@@ -73,19 +90,40 @@ fn buildNative(b: *Build, opts: Options) !void {
     if (b.args) |args| {
         run_cmd.addArgs(args);
     }
+
+    const mod_tests = b.addTest(.{
+        .name = "mod tests",
+        .root_module = opts.mod_ft,
+    });
+    const run_mod_tests = b.addRunArtifact(mod_tests);
+
+    const exe_tests = b.addTest(.{
+        .name = "exe tests",
+        .root_module = opts.mod_exe,
+    });
+    const run_exe_tests = b.addRunArtifact(exe_tests);
+
+    const test_step = b.step("test", "Run tests");
+    test_step.dependOn(&run_mod_tests.step);
+    test_step.dependOn(&run_exe_tests.step);
 }
 
 fn buildWeb(b: *Build, opts: Options) !void {
     const lib = b.addLibrary(.{
         .name = "factorio_toolbox",
-        .root_module = opts.mod,
+        .root_module = opts.mod_exe,
     });
 
     const emsdk = opts.dep_sokol.builder.dependency("emsdk", .{});
+
+    const emsdk_incl_path = emsdk.path("upstream/emscripten/cache/sysroot/include");
+    opts.dep_cimgui.artifact(opts.cimgui_clib_name).addSystemIncludePath(emsdk_incl_path);
+    opts.dep_cimgui.artifact(opts.cimgui_clib_name).step.dependOn(&opts.dep_sokol.artifact("sokol_clib").step);
+
     const link_step = try sokol.emLinkStep(b, .{
         .lib_main = lib,
-        .target = opts.mod.resolved_target.?,
-        .optimize = opts.mod.optimize.?,
+        .target = opts.mod_exe.resolved_target.?,
+        .optimize = opts.mod_exe.optimize.?,
         .emsdk = emsdk,
         .use_webgl2 = true,
         .use_emmalloc = true,
diff --git a/build.zig.zon b/build.zig.zon
index 5021a4b..e76a097 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -8,6 +8,10 @@
             .url = "git+https://github.com/floooh/sokol-zig.git#76d4afd25adfae9666d76a0d324cdb70ad178a88",
             .hash = "sokol-0.1.0-pb1HK3TYLgCx8lOxdLVWIVDcAzacxO8YDfyw2Er-_2nN",
         },
+        .cimgui = .{
+            .url = "git+https://github.com/floooh/dcimgui.git#d5fb4e3d27b79062dc5981db3631dadc4f204654",
+            .hash = "cimgui-0.1.0-44Clkd6YlAAYULKHDwsDX9EPmka-VAVEjUl-o6ve307E",
+        },
     },
     .paths = .{
         "build.zig",
-- 
2.51.2