add a build.zig and build.zig.zon file for use as Zig package

.gitignore

@@ -4,3 +4,5 @@ imgui-docking/
 dear_bindings/
 build/
 src*/*.json
+.zig-*
+zig-*

README.md

@@ -1,7 +1,7 @@
 [![Build](https://github.com/floooh/dcimgui/actions/workflows/build.yml/badge.svg)](https://github.com/floooh/dcimgui/actions/workflows/build.yml)
 
 An version-tagged all-in-one [Dear ImGui](https://github.com/ocornut/imgui)
-source distribution repository for C and C++ coding with:
+source distribution repository for C, C++ and Zig coding with:
 
 - regular and docking flavours of Dear ImGui
 - C bindings for both flavours (generated with the
@@ -29,3 +29,10 @@ To use the C++ API:
 
 - for regular version: link with `imgui` and include `imgui.h`
 - for the docking version: link with `imgui-docking` and include `imgui.h`
+
+To use the Zig module:
+
+- add a dependency to `git+https://github.com/floooh/dcimgui.git#[version]` to
+  your build.zig.zon
+- ...and see https://github.com/floooh/sokol-zig-imgui-sample/blob/main/build.zig
+  for how to integrate the `cimgui` module

build.zig

@@ -0,0 +1,48 @@
+const std = @import("std");
+const builtin = @import("builtin");
+
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const lib_cimgui = b.addStaticLibrary(.{
+        .name = "cimgui_clib",
+        .target = target,
+        .optimize = optimize,
+        .link_libc = true,
+    });
+    lib_cimgui.linkLibCpp();
+    lib_cimgui.addCSourceFiles(.{
+        .files = &.{
+            "src/cimgui.cpp",
+            "src/imgui_demo.cpp",
+            "src/imgui_draw.cpp",
+            "src/imgui_tables.cpp",
+            "src/imgui_widgets.cpp",
+            "src/imgui.cpp",
+        },
+    });
+
+    // make cimgui available as artifact, this allows to inject
+    // the Emscripten sysroot include path in another build.zig
+    b.installArtifact(lib_cimgui);
+
+    // translate-c the cimgui.h file
+    // NOTE: running this step with the host target is intended to avoid
+    // any Emscripten header search path shenanigans
+    const translateC = b.addTranslateC(.{
+        .root_source_file = b.path("src/cimgui.h"),
+        .target = b.host,
+        .optimize = optimize,
+    });
+
+    // build cimgui as module
+    const mod_cimgui = b.addModule("cimgui", .{
+        .root_source_file = translateC.getOutput(),
+        .target = target,
+        .optimize = optimize,
+        .link_libc = true,
+        .link_libcpp = true,
+    });
+    mod_cimgui.linkLibrary(lib_cimgui);
+}

build.zig.zon

@@ -0,0 +1,10 @@
+.{
+    .name = "cimgui",
+    .version = "0.1.0",
+    .paths = .{
+        "src",
+        "src-docking",
+        "build.zig",
+        "build.zig.zon",
+    },
+}