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build.zig
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build.zig
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const std = @import("std");
const builtin = @import("builtin");
const pkmn = @import("node_modules/@pkmn/engine/build.zig");
const CompileStep = if (@hasDecl(std.Build, "Step"))
std.Build.Step.Compile
else
std.Build.CompileStep;
const has_path = @hasField(std.Build.LazyPath, "path");
const root_module = @hasField(CompileStep, "root_module");
const getenv = if (@hasDecl(std, "posix")) std.posix.getenv else std.os.getenv;
pub fn build(b: *std.Build) !void {
const release = if (getenv("DEBUG_PKMN_ENGINE")) |_| false else true;
const fast = try std.SemanticVersion.parse("0.12.0-dev.866+3a47bc715");
if (release and fast.order(builtin.zig_version) == .lt) {
std.log.warn("Release builds are ~10-20% slower than before Zig " ++
"v0.12.0-dev.866+3a47bc715 due to ziglang/zig#17768", .{});
}
const target = if (@hasDecl(std.Build, "resolveTargetQuery"))
b.resolveTargetQuery(.{})
else
std.zig.CrossTarget{};
const showdown =
b.option(bool, "showdown", "Enable Pokémon Showdown compatibility mode") orelse true;
const module = pkmn.module(b, .{ .log = true, .showdown = showdown });
const node_modules = b.pathJoin(&.{ "node_modules", "@pkmn", "@engine", "build" });
const node = if (b.findProgram(&.{"node"}, &.{})) |path| path else |_| {
try std.io.getStdErr().writeAll("Cannot find node\n");
std.process.exit(1);
};
const node_headers = headers: {
var headers = resolve(b, &.{ node, "..", "..", "include", "node" });
var node_h = b.pathJoin(&.{ headers, "node.h" });
if (try exists(headers)) break :headers headers;
headers = resolve(b, &.{ node_modules, "include" });
node_h = b.pathJoin(&.{ headers, "node.h" });
if (try exists(headers)) break :headers headers;
try std.io.getStdErr().writeAll("Cannot find node headers\n");
std.process.exit(1);
};
const node_import_lib = if (detect(target).os.tag == .windows) lib: {
var lib = resolve(b, &.{ node, "..", "node.lib" });
if (try exists(lib)) break :lib lib;
lib = resolve(b, &.{ node_modules, "lib", "node.lib" });
if (try exists(lib)) break :lib lib;
try std.io.getStdErr().writeAll("Cannot find node import lib\n");
std.process.exit(1);
} else null;
{
const path = if (has_path) .{ .path = "src/lib/node.zig" } else b.path("src/lib/node.zig");
const optimize = if (release) std.builtin.Mode.ReleaseFast else std.builtin.Mode.Debug;
const addon = if (@hasField(std.Build.SharedLibraryOptions, "strip")) b.addSharedLibrary(.{
.name = "addon",
.root_source_file = path,
.optimize = optimize,
.target = target,
.strip = release,
}) else addon: {
const a = b.addSharedLibrary(.{
.name = "addon",
.root_source_file = path,
.optimize = optimize,
.target = target,
});
a.strip = true;
break :addon a;
};
if (root_module) {
addon.root_module.addImport("pkmn", module);
} else {
addon.addModule("pkmn", module);
}
addon.addSystemIncludePath(.{ .cwd_relative = node_headers });
addon.linkLibC();
if (node_import_lib) |il| {
addon.addObjectFile(if (has_path) .{ .path = il } else b.path(il));
}
addon.linker_allow_shlib_undefined = true;
if (release) {
if (b.findProgram(&.{"strip"}, &.{})) |strip| {
if (builtin.os.tag != .macos) {
const sh = b.addSystemCommand(&.{ strip, "-s" });
sh.addArtifactArg(addon);
b.getInstallStep().dependOn(&sh.step);
}
} else |_| {}
}
b.getInstallStep().dependOn(
&b.addInstallFileWithDir(addon.getEmittedBin(), .lib, "addon.node").step,
);
}
{
const entry = @hasDecl(CompileStep, "Entry");
const freestanding = if (@hasDecl(std.Build, "resolveTargetQuery"))
b.resolveTargetQuery(.{ .cpu_arch = .wasm32, .os_tag = .freestanding })
else
std.zig.CrossTarget{ .cpu_arch = .wasm32, .os_tag = .freestanding };
const optimize = if (release) std.builtin.Mode.ReleaseSmall else std.builtin.Mode.Debug;
const path = if (has_path) .{ .path = "src/lib/wasm.zig" } else b.path("src/lib/wasm.zig");
const wasm = if (entry) wasm: {
const exe = b.addExecutable(if (@hasField(std.Build.ExecutableOptions, "strip")) .{
.name = "addon",
.root_source_file = path,
.optimize = optimize,
.target = freestanding,
.strip = release,
} else .{
.name = "addon",
.root_source_file = path,
.optimize = optimize,
.target = freestanding,
});
(if (root_module) exe.root_module else exe).export_symbol_names = &[_][]const u8{};
exe.entry = .disabled;
break :wasm exe;
} else wasm: {
const lib = b.addSharedLibrary(.{
.name = "addon",
.root_source_file = path,
.optimize = optimize,
.target = freestanding,
});
lib.rdynamic = true;
break :wasm lib;
};
if (root_module) {
wasm.root_module.addImport("pkmn", module);
} else {
wasm.addModule("pkmn", module);
}
wasm.stack_size = std.wasm.page_size;
if (@hasDecl(@TypeOf(wasm.*), "strip")) wasm.strip = release;
const installed = if (release) installed: {
const bin = b.pathJoin(&.{ "node_modules", ".bin" });
if (b.findProgram(&.{"wasm-opt"}, &.{bin})) |opt| {
const sh = b.addSystemCommand(&.{ opt, "-O4" });
sh.addArtifactArg(wasm);
sh.addArg("-o");
const out = "build/lib/addon.wasm";
if (@hasDecl(@TypeOf(sh.*), "addFileSourceArg")) {
sh.addFileSourceArg(if (has_path) .{ .path = out } else b.path(out));
} else {
sh.addFileArg(if (has_path) .{ .path = out } else b.path(out));
}
b.getInstallStep().dependOn(&sh.step);
break :installed true;
} else |_| break :installed false;
} else false;
if (!entry) {
b.installArtifact(wasm);
} else if (!installed) {
b.getInstallStep().dependOn(&b.addInstallArtifact(wasm, .{
.dest_dir = .{ .override = std.Build.InstallDir{ .lib = {} } },
}).step);
}
}
const test_filter =
b.option([]const u8, "test-filter", "Skip tests that do not match filter");
const path = if (has_path) .{ .path = "src/lib/test.zig" } else b.path("src/lib/test.zig");
const optimize = if (release) std.builtin.Mode.ReleaseSafe else std.builtin.Mode.Debug;
const tests = (if (@hasField(std.Build.TestOptions, "single_threaded")) b.addTest(.{
.root_source_file = path,
.optimize = optimize,
.target = target,
.filter = test_filter,
.single_threaded = true,
}) else tests: {
const t = b.addTest(.{
.root_source_file = path,
.optimize = optimize,
.target = target,
.filter = test_filter,
});
t.single_threaded = true;
break :tests t;
});
const lint = b.addSystemCommand(&.{"ziglint"});
b.step("lint", "Lint source files").dependOn(&lint.step);
b.step("test", "Run all tests").dependOn(&b.addRunArtifact(tests).step);
}
fn resolve(b: *std.Build, paths: []const []const u8) []u8 {
return std.fs.path.resolve(b.allocator, paths) catch @panic("OOM");
}
fn exists(path: []const u8) !bool {
return if (std.fs.accessAbsolute(path, .{})) |_| true else |err| switch (err) {
error.FileNotFound => false,
else => return err,
};
}
fn detect(target: anytype) std.Target {
if (@hasField(@TypeOf(target), "result")) return target.result;
return (std.zig.system.NativeTargetInfo.detect(target) catch unreachable).target;
}