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Merge branch 'pm'
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@efjimm
efjimm committed Jul 27, 2023
2 parents 8061d1c + b4e665b commit 1da9836
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Showing 3 changed files with 72 additions and 98 deletions.
1 change: 1 addition & 0 deletions .gitignore
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zig-cache/
zig-out/
164 changes: 66 additions & 98 deletions build.zig
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const std = @import("std");

const Build = std.Build;
const CompileStep = std.build.CompileStep;

pub const LuaVersion = enum {
lua_51,
Expand All @@ -11,123 +10,92 @@ pub const LuaVersion = enum {
// lua_jit,
};

fn libPath(version: LuaVersion) []const u8 {
return switch (version) {
.lua_51 => "src/ziglua-5.1/lib.zig",
.lua_52 => "src/ziglua-5.2/lib.zig",
.lua_53 => "src/ziglua-5.3/lib.zig",
.lua_54 => "src/ziglua-5.4/lib.zig",
};
}

pub fn build(b: *Build) void {
const version = b.option(LuaVersion, "version", "lua version to test") orelse .lua_54;

const tests = b.addTest(.{
.root_source_file = switch (version) {
.lua_51 => .{ .path = "src/ziglua-5.1/tests.zig" },
.lua_52 => .{ .path = "src/ziglua-5.2/tests.zig" },
.lua_53 => .{ .path = "src/ziglua-5.3/tests.zig" },
.lua_54 => .{ .path = "src/ziglua-5.4/tests.zig" },
const target = b.standardTargetOptions(.{});
const optimize = b.standardOptimizeOption(.{});
const lua_version = b.option(LuaVersion, "version", "Lua API and library version") orelse .lua_54;
const shared = b.option(bool, "shared", "Build shared library instead of static") orelse false;

const lib_opts = .{
.name = "lua",
.target = target,
.optimize = optimize,
.version = switch (lua_version) {
.lua_51 => std.SemanticVersion{ .major = 5, .minor = 1, .patch = 5 },
.lua_52 => std.SemanticVersion{ .major = 5, .minor = 2, .patch = 4 },
.lua_53 => std.SemanticVersion{ .major = 5, .minor = 3, .patch = 6 },
.lua_54 => std.SemanticVersion{ .major = 5, .minor = 4, .patch = 4 },
},
});
link(b, tests, .{ .use_apicheck = true, .version = version });

const run_unit_tests = b.addRunArtifact(tests);

const test_step = b.step("test", "Run ziglua tests");
test_step.dependOn(&run_unit_tests.step);
}

fn dir() []const u8 {
return std.fs.path.dirname(@src().file) orelse ".";
}

pub const Options = struct {
/// Defines the macro LUA_USE_APICHECK in debug builds
use_apicheck: bool = false,
/// Defines the Lua version to build and link
version: LuaVersion = .lua_54,

shared: bool = false,
};

pub fn compileAndCreateModule(b: *Build, step: *CompileStep, options: Options) *std.build.Module {
link(b, step, options);

const lib_path = libPath(options.version);
return b.createModule(.{
.source_file = .{ .path = std.fs.path.join(b.allocator, &.{ dir(), lib_path }) catch unreachable },
});
}

// TODO: expose the link and package steps separately for advanced use cases?
fn link(b: *Build, step: *CompileStep, options: Options) void {
const lua = buildLua(b, step, options);
step.linkLibrary(lua);
}

// TODO: how to test all versions? May need a make/help script to test all
// versions separately because there might be name collisions
fn buildLua(b: *Build, step: *CompileStep, options: Options) *CompileStep {
const lib_dir = switch (options.version) {
.lua_51 => "lib/lua-5.1/src/",
.lua_52 => "lib/lua-5.2/src/",
.lua_53 => "lib/lua-5.3/src/",
.lua_54 => "lib/lua-5.4/src/",
};

const lua = brk: {
if (options.shared) break :brk b.addSharedLibrary(.{
.name = "lua",
.target = step.target,
.optimize = step.optimize,
});

break :brk b.addStaticLibrary(.{
.name = "lua",
.target = step.target,
.optimize = step.optimize,
});
const lib = if (shared)
b.addSharedLibrary(lib_opts)
else
b.addStaticLibrary(lib_opts);
const lib_dir = switch (lua_version) {
.lua_51 => "lib/lua-5.1.5/src",
.lua_52 => "lib/lua-5.2.4/src",
.lua_53 => "lib/lua-5.3.6/src",
.lua_54 => "lib/lua-5.4.4/src",
};

lua.linkLibC();

const apicheck = step.optimize == .Debug and options.use_apicheck;

step.addIncludePath(std.fs.path.join(b.allocator, &.{ dir(), lib_dir }) catch unreachable);

const target = (std.zig.system.NativeTargetInfo.detect(step.target) catch unreachable).target;

const lua_source_files = switch (lua_version) {
.lua_51 => &lua_51_source_files,
.lua_52 => &lua_52_source_files,
.lua_53 => &lua_53_source_files,
.lua_54 => &lua_54_source_files,
};
lib.addIncludePath(lib_dir);
const os_tag = target.os_tag orelse
(std.zig.system.NativeTargetInfo.detect(target) catch unreachable).target.os.tag;
const flags = [_][]const u8{
// Standard version used in Lua Makefile
"-std=gnu99",

// Define target-specific macro
switch (target.os.tag) {
switch (os_tag) {
.linux => "-DLUA_USE_LINUX",
.macos => "-DLUA_USE_MACOSX",
.windows => "-DLUA_USE_WINDOWS",
else => "-DLUA_USE_POSIX",
},

// Enable api check if desired
if (apicheck) "-DLUA_USE_APICHECK" else "",
};

const lua_source_files = switch (options.version) {
.lua_51 => &lua_51_source_files,
.lua_52 => &lua_52_source_files,
.lua_53 => &lua_53_source_files,
.lua_54 => &lua_54_source_files,
if (optimize == .Debug) "-DLUA_USE_APICHECK" else "",
};

for (lua_source_files) |file| {
const path = std.fs.path.join(b.allocator, &.{ dir(), lib_dir, file }) catch unreachable;
lua.addCSourceFile(path, &flags);
const path = std.fs.path.join(b.allocator, &.{ lib_dir, file }) catch unreachable;
lib.addCSourceFile(path, &flags);
}
lib.linkLibC();
b.installArtifact(lib);
lib.installHeader(b.pathJoin(&.{ lib_dir, "lua.h" }), "lua/lua.h");
lib.installHeader(b.pathJoin(&.{ lib_dir, "lualib.h" }), "lua/lualib.h");
lib.installHeader(b.pathJoin(&.{ lib_dir, "lauxlib.h" }), "lua/lauxlib.h");

_ = b.addModule("ziglua", .{
.source_file = switch (lua_version) {
.lua_51 => .{ .path = "src/ziglua-5.1/lib.zig" },
.lua_52 => .{ .path = "src/ziglua-5.2/lib.zig" },
.lua_53 => .{ .path = "src/ziglua-5.3/lib.zig" },
.lua_54 => .{ .path = "src/ziglua-5.4/lib.zig" },
},
});
// TODO: mod.addIncludePath(lib_dir);
// https://github.com/ziglang/zig/issues/14719

const tests = b.addTest(.{
.root_source_file = switch (lua_version) {
.lua_51 => .{ .path = "src/ziglua-5.1/tests.zig" },
.lua_52 => .{ .path = "src/ziglua-5.2/tests.zig" },
.lua_53 => .{ .path = "src/ziglua-5.3/tests.zig" },
.lua_54 => .{ .path = "src/ziglua-5.4/tests.zig" },
},
.optimize = optimize,
});
tests.addIncludePath(lib_dir);
tests.linkLibrary(lib);

return lua;
const test_step = b.step("test", "Run ziglua tests");
test_step.dependOn(&tests.step);
}

const lua_51_source_files = [_][]const u8{
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5 changes: 5 additions & 0 deletions build.zig.zon
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.{
.name = "ziglua",
.description = "Zig bindings for the Lua C API",
.version = "0.1.0",
}

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