initial zig build system as alternative to cmake

Author: emanspeaks

.gitignore

@@ -1,6 +1,8 @@
 /.claude/
 /.cache/
 /build/
+/.zig-cache/
+/zig-out/
 # /buildtools/bin/
 # /buildtools/downloads/
 # /buildtools/llvm-*/

.gitmodules

@@ -4,3 +4,6 @@
 [submodule ".cspell/cesium"]
 	path = .cspell/cesium
 	url = https://github.com/cesiumlang/cspell-cesium.git
+[submodule "thirdparty/tree-sitter"]
+	path = thirdparty/tree-sitter
+	url = https://github.com/tree-sitter/tree-sitter.git

.vscode/ltex.dictionary.en-US.txt

@@ -6,6 +6,9 @@ CPACK
 darkgray
 Darkmode
 Deallocation
+dlopen
+dlsym
+dylib
 EBNF
 Enums
 Fallthrough
@@ -18,21 +21,29 @@ Interop
 intrinsics
 katex
 lexer
+libtree
 lightgray
 Monomorphization
 MSVC
 Namespacing
+nlohmann
 PYRANDYOS
 PYTHONUNBUFFERED
 RRGGBB
 Schibsted
 scrutinising
 shadowable
 shiki
+subprocessing
 szenius
 unistd
+userland
 vaddps
 Variadic
 variadics
 vmovups
+windarkmode
+yyjson
 Zig
+
+cesium-buildtools

CMakeLists.txt

@@ -0,0 +1,122 @@
+const std = @import("std");
+
+fn setupYyJsonDependency(b: *std.Build, exe: *std.Build.Step.Compile) void {
+    const yyjson_dep = b.dependency("yyjson", .{});
+
+    exe.addCSourceFiles(.{
+        .root = yyjson_dep.path(""),
+        .files = &[_][]const u8{
+            "src/yyjson.c",
+        },
+        .flags = &[_][]const u8{
+            "-std=c99",
+        },
+    });
+
+    exe.addIncludePath(yyjson_dep.path("src"));
+}
+
+fn setupTreeSitterCppDependency(b: *std.Build, exe: *std.Build.Step.Compile) void {
+    const tree_sitter_cpp_dep = b.dependency("tree_sitter_cpp", .{});
+
+    exe.addCSourceFiles(.{
+        .root = tree_sitter_cpp_dep.path(""),
+        .files = &[_][]const u8{
+            "src/parser.c",
+            "src/scanner.c", 
+        },
+        .flags = &[_][]const u8{
+            "-std=c11",  // Use C11 for static_assert support
+        },
+    });
+}
+
+fn setupTreeSitterCoreDependency(b: *std.Build, exe: *std.Build.Step.Compile) void {
+    // Add tree-sitter core from git submodule
+    exe.addCSourceFiles(.{
+        .root = b.path("."),
+        .files = &[_][]const u8{
+            "thirdparty/tree-sitter/lib/src/lib.c",  // Amalgamated source
+        },
+        .flags = &[_][]const u8{
+            "-std=c11",
+        },
+    });
+    
+    // Add tree-sitter include paths
+    exe.addIncludePath(b.path("thirdparty/tree-sitter/lib/include"));
+    exe.addIncludePath(b.path("thirdparty/tree-sitter/lib/src"));
+    
+    // Add tree-sitter macros
+    exe.root_module.addCMacro("_POSIX_C_SOURCE", "200112L");
+    exe.root_module.addCMacro("_DEFAULT_SOURCE", "");
+}
+
+fn configureExecutable(b: *std.Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode) *std.Build.Step.Compile {
+    const exe = b.addExecutable(.{
+        .name = "cesium",
+        .root_module = b.createModule(.{
+            .target = target,
+            .optimize = optimize,
+        }),
+    });
+
+    // Add C++ source files
+    exe.addCSourceFiles(.{
+        .files = &[_][]const u8{
+            "cesium/src/main.cpp",
+        },
+        .flags = &[_][]const u8{
+            "-std=c++20",  // CMAKE_CXX_STANDARD 20
+            "-Wall",       // target_compile_options
+            "-Wextra",
+            "-Wpedantic", 
+            "-Wno-unused-parameter",  // Clang-specific flag from CMake
+        },
+    });
+
+    // Link libraries
+    exe.linkLibCpp();
+    exe.linkLibC();
+
+    return exe;
+}
+
+fn setupBuildSteps(b: *std.Build, exe: *std.Build.Step.Compile) void {
+    // Install the executable
+    b.installArtifact(exe);
+
+    // Create a run step
+    const run_cmd = b.addRunArtifact(exe);
+    run_cmd.step.dependOn(b.getInstallStep());
+
+    // Allow passing arguments to the application
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+
+    // Create a run step that can be executed with `zig build run`
+    const run_step = b.step("run", "Run the cesium compiler");
+    run_step.dependOn(&run_cmd.step);
+
+    // Create test step for future use
+    const test_step = b.step("test", "Run unit tests");
+    _ = test_step; // Suppress unused variable warning for now
+}
+
+pub fn build(b: *std.Build) void {
+    // Standard target and optimization options
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    // Configure the main executable
+    const exe = configureExecutable(b, target, optimize);
+
+    // Setup all dependencies
+    setupYyJsonDependency(b, exe);
+    setupTreeSitterCppDependency(b, exe);
+    setupTreeSitterCoreDependency(b, exe);
+
+    // Setup build steps
+    setupBuildSteps(b, exe);
+}

CMakePresets.json

@@ -0,0 +1,60 @@
+.{
+    // This is the default name used by packages depending on this one. For
+    // example, when a user runs `zig fetch --save <url>`, this field is used
+    // as the key in the `dependencies` table. Although the user can choose a
+    // different name, most users will stick with this provided value.
+    //
+    // It is redundant to include "zig" in this name because it is already
+    // within the Zig package namespace.
+    .name = .cesium,
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "0.1.0",
+    // Together with name, this represents a globally unique package
+    // identifier. This field is generated by the Zig toolchain when the
+    // package is first created, and then *never changes*. This allows
+    // unambiguous detection of one package being an updated version of
+    // another.
+    //
+    // When forking a Zig project, this id should be regenerated (delete the
+    // field and run `zig build`) if the upstream project is still maintained.
+    // Otherwise, the fork is *hostile*, attempting to take control over the
+    // original project's identity. Thus it is recommended to leave the comment
+    // on the following line intact, so that it shows up in code reviews that
+    // modify the field.
+    .fingerprint = 0x31b74be1c2c745f5, // Changing this has security and trust implications.
+    // Tracks the earliest Zig version that the package considers to be a
+    // supported use case.
+    .minimum_zig_version = "0.15.1",
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        .yyjson = .{
+            .url = "https://github.com/ibireme/yyjson/archive/refs/tags/0.12.0.tar.gz",
+            .hash = "N-V-__8AADJobAAfcT3EULUqTBZto6rfWBxzeDyfBxrSCP_b",
+        },
+        .tree_sitter_cpp = .{
+            .url = "https://github.com/tree-sitter/tree-sitter-cpp/archive/refs/tags/v0.23.4.tar.gz",
+            .hash = "N-V-__8AABV0FwFoNpDVbhYQMEJgss9bkxDorw6hbZVJPCdg",
+        },
+    },
+    // Specifies the set of files and directories that are included in this package.
+    // Only files and directories listed here are included in the `hash` that
+    // is computed for this package. Only files listed here will remain on disk
+    // when using the zig package manager. As a rule of thumb, one should list
+    // files required for compilation plus any license(s).
+    // Paths are relative to the build root. Use the empty string (`""`) to refer to
+    // the build root itself.
+    // A directory listed here means that all files within, recursively, are included.
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "cesium",
+        // For example...
+        //"LICENSE",
+        //"README.md",
+    },
+}

build.zig

@@ -12,11 +12,15 @@
     "files.watcherExclude": {
 			"buildtools/clang+llvm-*/": true,
 			"buildtools/llvm-*/": true,
+      "buildtools/bin/zig-*/": true,
+			"buildtools/bin/zig-x86_64-windows-*/": true,
 			"buildtools/bin/cmake-*-windows-x86_64/**": true,
 			"buildtools/bin/cmake-*/**": true,
-			"build/CMakeFiles/**": true,
+			"build/**": true,
+      "**/.zig-cache/**": true,
       "**/node_modules/**": true,
       "**/.cache/**": true,
+      "**/.git/**": true,
 		},
     "files.exclude": {
       "**/node_modules/**": true,
@@ -40,16 +44,20 @@
     // "foam.files.newNotePath": "currentDir",
     // "foam.completion.useAlias": "whenPathDiffersFromTitle",
     // "foam.preview.embedNoteType": "content-inline",
-    "cmake.environment": {
-      "PATH": "${workspaceFolder}/buildtools/bin;${workspaceFolder}/buildtools/llvm-21.1.0/bin;${env:PATH}"
-    },
-    "cmake.additionalCompilerSearchDirs": [
-      "${workspaceFolder:cesium-src}/buildtools/bin",
-      "${workspaceFolder:cesium-src}/buildtools/llvm-21.1.0/bin",
-    ],
-    "cmake.cmakePath": "${workspaceFolder}/buildtools/bin/cmake-4.1.1/bin/cmake",
+    // "cmake.environment": {
+    //   "PATH": "${workspaceFolder}/buildtools/bin;${workspaceFolder}/buildtools/llvm-21.1.0/bin;${env:PATH}"
+    // },
+    // "cmake.additionalCompilerSearchDirs": [
+    //   "${workspaceFolder:cesium-src}/buildtools/bin",
+    //   "${workspaceFolder:cesium-src}/buildtools/llvm-21.1.0/bin",
+    // ],
+    // "cmake.cmakePath": "${workspaceFolder}/buildtools/bin/cmake-4.1.1/bin/cmake",
     "clangd.path": "${workspaceFolder}/buildtools/llvm-21.1.0/bin/clangd.exe",
-    // "cmake.configureOnOpen": false,
+    "cmake.configureOnOpen": false,
+    "cmake.configureOnEdit": false,
+    "terminal.integrated.env.windows": {
+      "PATH": "${workspaceFolder}/buildtools/bin/zig-0.15.1;${workspaceFolder}/buildtools/llvm-21.1.0/bin;${env:PATH}"
+    },
   },
   "extensions": {
     // See http://go.microsoft.com/fwlink/?LinkId=827846