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{build,wasmserve}: use wasmserve, drop apple_pie

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Ali Chraghi 2022-09-14 18:41:40 +04:30 • committed by Stephen Gutekanst
parent ebb4b9c2fe
commit 5be9f04d85
18 changed files with 747 additions and 133 deletions
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3
.gitmodules vendored
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@ -19,9 +19,6 @@
[submodule "freetype/upstream"]
path = libs/freetype/upstream
url = https://github.com/hexops/freetype
[submodule "tools/libs/apple_pie"]
path = tools/libs/apple_pie
url = https://github.com/Luukdegram/apple_pie
[submodule "glfw/upstream"]
path = libs/glfw/upstream
url = https://github.com/hexops/glfw

57
build.zig
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@ -122,9 +122,9 @@ pub fn build(b: *std.build.Builder) void {
example_compile_step.dependOn(&example_app.getInstallStep().?.step);
const example_run_cmd = example_app.run();
example_run_cmd.step.dependOn(&example_app.getInstallStep().?.step);
example_run_cmd.dependOn(&example_app.getInstallStep().?.step);
const example_run_step = b.step("run-example-" ++ example.name, "Run '" ++ example.name ++ "' example");
example_run_step.dependOn(&example_run_cmd.step);
example_run_step.dependOn(example_run_cmd);
}
if (target.toTarget().cpu.arch != .wasm32) {
@ -144,9 +144,9 @@ pub fn build(b: *std.build.Builder) void {
shaderexp_compile_step.dependOn(&shaderexp_app.getInstallStep().?.step);
const shaderexp_run_cmd = shaderexp_app.run();
shaderexp_run_cmd.step.dependOn(&shaderexp_app.getInstallStep().?.step);
shaderexp_run_cmd.dependOn(&shaderexp_app.getInstallStep().?.step);
const shaderexp_run_step = b.step("run-shaderexp", "Run shaderexp");
shaderexp_run_step.dependOn(&shaderexp_run_cmd.step);
shaderexp_run_step.dependOn(shaderexp_run_cmd);
}
const compile_all = b.step("compile-all", "Compile all examples and applications");
@ -314,9 +314,7 @@ pub const App = struct {
app.getInstallStep().?.step.dependOn(&install_js.step);
}
const html_generator = app.b.addExecutable("html-generator", (comptime thisDir()) ++ "/tools/html-generator.zig");
html_generator.main_pkg_path = (comptime thisDir());
const html_generator = app.b.addExecutable("html-generator", (comptime thisDir()) ++ "/tools/html-generator/main.zig");
const run_html_generator = html_generator.run();
const html_file_name = std.mem.concat(
app.b.allocator,
@ -360,45 +358,24 @@ pub const App = struct {
return app.step.install_step;
}
pub fn run(app: *const App) *std.build.RunStep {
pub fn run(app: *const App) *std.build.Step {
if (app.platform == .web) {
ensureDependencySubmodule(app.b.allocator, "tools/libs/apple_pie") catch unreachable;
const http_server = app.b.addExecutable("http-server", (comptime thisDir()) ++ "/tools/http-server.zig");
http_server.addPackage(.{
.name = "apple_pie",
.source = .{ .path = "tools/libs/apple_pie/src/apple_pie.zig" },
});
// NOTE: The launch actually takes place in reverse order. The browser is launched first
// and then the http-server.
// This is because running the server would block the process (a limitation of current
// RunStep). So we assume that (xdg-)open is a launcher and not a blocking process.
const address = std.process.getEnvVarOwned(app.b.allocator, "MACH_ADDRESS") catch app.b.allocator.dupe(u8, "127.0.0.1") catch unreachable;
const port = std.process.getEnvVarOwned(app.b.allocator, "MACH_PORT") catch app.b.allocator.dupe(u8, "8080") catch unreachable;
defer {
app.b.allocator.free(address);
app.b.allocator.free(port);
}
const address_parsed = std.net.Address.parseIp4(address, std.fmt.parseInt(u16, port, 10) catch unreachable) catch unreachable;
const launch = app.b.addSystemCommand(&.{
switch (builtin.os.tag) {
.macos, .windows => "open",
else => "xdg-open", // Assume linux-like
const wasmserve = @import("tools/wasmserve/wasmserve.zig");
const serve_step = wasmserve.serve(
app.step,
.{
.install_dir = web_install_dir,
.watch_paths = &.{"tools/wasmserve/wasmserve.zig"},
.listen_address = address_parsed,
},
app.b.fmt("http://{s}:{s}/{s}.html", .{ address, port, app.name }),
});
launch.step.dependOn(&app.getInstallStep().?.step);
const serve = http_server.run();
serve.addArgs(&.{ app.name, address, port });
serve.step.dependOn(&launch.step);
serve.cwd = app.b.getInstallPath(web_install_dir, "");
return serve;
) catch unreachable;
return &serve_step.step;
} else {
return app.step.run();
return &app.step.run().step;
}
}
};

15
tools/html-generator.zig → tools/html-generator/main.zig
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@ -1,6 +1,7 @@
const std = @import("std");
const source = @embedFile("../www/template.html");
const source = @embedFile("template.html");
const app_name_needle = "{ app_name }";
pub fn main() !void {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
@ -11,16 +12,18 @@ pub fn main() !void {
defer std.process.argsFree(allocator, args);
if (args.len < 3) {
std.debug.print("Usage: html-generator <output-name> <application-name>\n", .{});
std.debug.print("Usage: html-generator <output-name> <app-name>\n", .{});
return;
}
const output_name = args[1];
const application_name = args[2];
const app_name = args[2];
const file = try std.fs.cwd().createFile(output_name, std.fs.File.CreateFlags{});
const file = try std.fs.cwd().createFile(output_name, .{});
defer file.close();
var buf = try allocator.alloc(u8, std.mem.replacementSize(u8, source, app_name_needle, app_name));
defer allocator.free(buf);
const writer = file.writer();
try std.fmt.format(writer, source, .{application_name});
_ = std.mem.replace(u8, source, app_name_needle, app_name, buf);
_ = try file.write(buf);
}

53
tools/html-generator/template.html Normal file
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@ -0,0 +1,53 @@
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>{ app_name }</title>
</head>
<body>
<script type="module">
import { mach } from "./mach.js";
import { zig } from "./mach-sysjs.js";
import setupWasmserve from "./wasmserve.js";
setupWasmserve();
let imports = {
env: { ...mach, ...zig },
};
fetch("{ app_name }.wasm")
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, imports))
.then(results => results.instance)
.then(instance => {
zig.init(instance);
mach.init(instance);
instance.exports.wasmInit();
let frame = true;
let last_update_time = performance.now();
let update = function () {
if (!frame) return;
if (mach.machHasEvent() ||
(last_update_time + (mach.wait_event_timeout * 1000)) <= performance.now()) {
instance.exports.wasmUpdate();
last_update_time = performance.now();
}
window.requestAnimationFrame(update);
};
window.requestAnimationFrame(update);
window.addEventListener("mach-close", () => {
instance.exports.wasmDeinit();
frame = false;
});
})
.catch(err => console.error(err));
</script>
</body>
</html>

37
tools/http-server.zig
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@ -1,37 +0,0 @@
const std = @import("std");
const http = @import("apple_pie");
const file_server = http.FileServer;
pub const io_mode = .evented;
pub fn main() !u8 {
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const allocator = gpa.allocator();
const args = try std.process.argsAlloc(allocator);
defer std.process.argsFree(allocator, args);
if (args.len < 4) {
std.debug.print("Usage: http-server <application-name> <address> <port>\n", .{});
return 0;
}
const application_name = args[1];
const address = args[2];
const port = try std.fmt.parseUnsigned(u16, args[3], 10);
std.debug.print("Served at http://{s}:{}/{s}.html\n", .{ address, port, application_name });
try file_server.init(allocator, .{ .dir_path = "." });
defer file_server.deinit();
try http.listenAndServe(
allocator,
try std.net.Address.parseIp(address, port),
{},
file_server.serve,
);
return 0;
}

1
tools/libs/apple_pie

@ -1 +0,0 @@
Subproject commit 55b25cf50018fe314606765ca984a0a841743eb5

2
tools/wasmserve/.gitattributes vendored Normal file
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@ -0,0 +1,2 @@
* text=auto eol=lf
upstream/** linguist-vendored

18
tools/wasmserve/.gitignore vendored Normal file
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@ -0,0 +1,18 @@
# This file is for zig-specific build artifacts.
# If you have OS-specific or editor-specific files to ignore,
# such as *.swp or .DS_Store, put those in your global
# ~/.gitignore and put this in your ~/.gitconfig:
#
# [core]
# excludesfile = ~/.gitignore
#
# Cheers!
# -andrewrk
zig-cache/
zig-out/
/release/
/debug/
/build/
/build-*/
/docgen_tmp/

13
tools/wasmserve/LICENSE Normal file
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@ -0,0 +1,13 @@
Copyright 2021, Hexops Contributors (given via the Git commit history).
All documentation, image, sound, font, and 2D/3D model files are CC-BY-4.0 licensed unless
otherwise noted. You may get a copy of this license at https://creativecommons.org/licenses/by/4.0
Files in a directory with a separate LICENSE file may contain files under different license terms,
described within that LICENSE file.
All other files are licensed under the Apache License, Version 2.0 (see LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
or the MIT license (see LICENSE-MIT or http://opensource.org/licenses/MIT), at your option.
All files in the project without exclusions may not be copied, modified, or distributed except
according to the terms above.

202
tools/wasmserve/LICENSE-APACHE Normal file
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@ -0,0 +1,202 @@
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25
tools/wasmserve/LICENSE-MIT Normal file
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@ -0,0 +1,25 @@
Copyright (c) 2021 Hexops Contributors (given via the Git commit history).
Permission is hereby granted, free of charge, to any
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

31
tools/wasmserve/README.md Normal file
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@ -0,0 +1,31 @@
# mach/wasmserve
Small web server specifically for serving Zig WASM applications in development
## Getting started
### Adding dependency
In a `libs` subdirectory of the root of your project:
```sh
git clone https://github.com/machlibs/wasmserve
```
Then in your `build.zig` add:
```zig
...
const wasmserve = @import("libs/wasmserve/wasmserve.zig");
pub fn build(b: *Builder) void {
...
const serve_step = try wasmserve.serve(exe, .{ .watch_paths = &.{"src/main.zig"} });
const run_step = b.step("run", "Run development web server");
run_step.dependOn(&serve_step.step);
}
```
## Join the community
Join the Mach community [on Discord](https://discord.gg/XNG3NZgCqp) or [Matrix](https://matrix.to/#/#hexops:matrix.org) to discuss this project, ask questions, get help, etc.

15
tools/wasmserve/build.zig Normal file
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@ -0,0 +1,15 @@
const std = @import("std");
const wasmserve = @import("wasmserve.zig");
pub fn build(b: *std.build.Builder) !void {
const mode = b.standardReleaseOptions();
const exe = b.addSharedLibrary("test", "test/main.zig", .unversioned);
exe.setBuildMode(mode);
exe.setTarget(.{ .cpu_arch = .wasm32, .os_tag = .freestanding, .abi = .none });
exe.install();
const serve_step = try wasmserve.serve(exe, .{ .watch_paths = &.{"wasmserve.zig"} });
const run_step = b.step("test", "Start a testing server");
run_step.dependOn(&serve_step.step);
}

55
tools/wasmserve/mime.zig Normal file
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@ -0,0 +1,55 @@
pub const mime_list = [_]struct { ext: []const []const u8, mime: []const u8 }{
.{ .ext = &.{".aac"}, .mime = "audio/aac" },
.{ .ext = &.{".avif"}, .mime = "image/avif" },
.{ .ext = &.{".avi"}, .mime = "video/x-msvideo" },
.{ .ext = &.{".bin"}, .mime = "application/octet-stream" },
.{ .ext = &.{".bmp"}, .mime = "image/bmp" },
.{ .ext = &.{".bz"}, .mime = "application/x-bzip" },
.{ .ext = &.{".bz2"}, .mime = "application/x-bzip2" },
.{ .ext = &.{".css"}, .mime = "text/css" },
.{ .ext = &.{".csv"}, .mime = "text/csv" },
.{ .ext = &.{".eot"}, .mime = "application/vnd.ms-fontobject" },
.{ .ext = &.{".gz"}, .mime = "application/gzip" },
.{ .ext = &.{".gif"}, .mime = "image/gif" },
.{ .ext = &.{ ".htm", ".html" }, .mime = "text/html" },
.{ .ext = &.{".ico"}, .mime = "image/vnd.microsoft.icon" },
.{ .ext = &.{".ics"}, .mime = "text/calendar" },
.{ .ext = &.{".jar"}, .mime = "application/java-archive" },
.{ .ext = &.{ "..jpeg", "..jpg" }, .mime = "image/jpeg" },
.{ .ext = &.{".js"}, .mime = "text/javascript" },
.{ .ext = &.{".json"}, .mime = "application/json" },
.{ .ext = &.{".md"}, .mime = "text/x-markdown" },
.{ .ext = &.{".mjs"}, .mime = "text/javascript" },
.{ .ext = &.{".mp3"}, .mime = "audio/mpeg" },
.{ .ext = &.{".mp4"}, .mime = "video/mp4" },
.{ .ext = &.{".mpeg"}, .mime = "video/mpeg" },
.{ .ext = &.{".oga"}, .mime = "audio/ogg" },
.{ .ext = &.{".ogv"}, .mime = "video/ogg" },
.{ .ext = &.{".ogx"}, .mime = "application/ogg" },
.{ .ext = &.{".opus"}, .mime = "audio/opus" },
.{ .ext = &.{".otf"}, .mime = "font/otf" },
.{ .ext = &.{".png"}, .mime = "image/png" },
.{ .ext = &.{".pdf"}, .mime = "application/pdf" },
.{ .ext = &.{".rar"}, .mime = "application/vnd.rar" },
.{ .ext = &.{".rtf"}, .mime = "application/rtf" },
.{ .ext = &.{".sh"}, .mime = "application/x-sh" },
.{ .ext = &.{".svg"}, .mime = "image/svg+xml" },
.{ .ext = &.{".tar"}, .mime = "application/x-tar" },
.{ .ext = &.{ ".tif", ".tiff" }, .mime = "image/tiff" },
.{ .ext = &.{".toml"}, .mime = "text/toml" },
.{ .ext = &.{".ts"}, .mime = "video/mp2t" },
.{ .ext = &.{".ttf"}, .mime = "font/ttf" },
.{ .ext = &.{".txt"}, .mime = "text/plain" },
.{ .ext = &.{".wasm"}, .mime = "application/wasm" },
.{ .ext = &.{".wav"}, .mime = "audio/wav" },
.{ .ext = &.{".weba"}, .mime = "audio/webm" },
.{ .ext = &.{".webm"}, .mime = "video/webm" },
.{ .ext = &.{".webp"}, .mime = "image/webp" },
.{ .ext = &.{".woff"}, .mime = "font/woff" },
.{ .ext = &.{".woff2"}, .mime = "font/woff2" },
.{ .ext = &.{".yml"}, .mime = "application/x-yaml" },
.{ .ext = &.{".xhtml"}, .mime = "application/xhtml+xml" },
.{ .ext = &.{".xml"}, .mime = "application/xml" },
.{ .ext = &.{".zip"}, .mime = "application/zip" },
.{ .ext = &.{".7z"}, .mime = "application/x-7z-compressed" },
};

7
tools/wasmserve/test/main.zig Normal file
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@ -0,0 +1,7 @@
const std = @import("std");
pub fn main() void {
var x: i16 = 1;
x += 1;
std.testing.expect(x == 2) catch unreachable;
}

289
tools/wasmserve/wasmserve.zig Normal file
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const std = @import("std");
const mime = @import("mime.zig");
const net = std.net;
const mem = std.mem;
const fs = std.fs;
const build = std.build;
const js_path = "/www/wasmserve.js";
const default_mime = "text/plain";
const buffer_size = 2048;
const esc = struct {
pub const reset = "\x1b[0m";
pub const bold = "\x1b[1m";
pub const underline = "\x1b[4m";
pub const red = "\x1b[31m";
pub const yellow = "\x1b[33m";
pub const cyan = "\x1b[36m";
pub const gray = "\x1b[90m";
};
pub const Options = struct {
install_dir: ?build.InstallDir = null,
watch_paths: []const []const u8 = &.{},
listen_address: net.Address = net.Address.initIp4([4]u8{ 127, 0, 0, 1 }, 8080),
};
pub fn serve(step: *build.LibExeObjStep, options: Options) !*Wasmserve {
const self = step.builder.allocator.create(Wasmserve) catch unreachable;
const install_dir = options.install_dir orelse build.InstallDir{ .lib = {} };
self.* = Wasmserve{
.step = build.Step.init(.run, "wasmserve", step.builder.allocator, Wasmserve.make),
.b = step.builder,
.exe_step = step,
.install_dir = install_dir,
.install_dir_iter = try fs.cwd().makeOpenPathIterable(step.builder.getInstallPath(install_dir, ""), .{}),
.address = options.listen_address,
.subscriber = null,
.watch_paths = options.watch_paths,
.mtimes = std.AutoHashMap(fs.File.INode, i128).init(step.builder.allocator),
};
self.step.dependOn(&step.install_step.?.step);
return self;
}
const Wasmserve = struct {
step: build.Step,
b: *build.Builder,
exe_step: *build.LibExeObjStep,
install_dir: build.InstallDir,
install_dir_iter: fs.IterableDir,
address: net.Address,
subscriber: ?*net.StreamServer.Connection,
watch_paths: []const []const u8,
mtimes: std.AutoHashMap(fs.File.INode, i128),
const NotifyMessage = enum {
reload,
};
pub fn make(step: *build.Step) !void {
const self = @fieldParentPtr(Wasmserve, "step", step);
self.compile();
std.debug.assert(mem.eql(u8, fs.path.extension(self.exe_step.out_filename), ".wasm"));
const install_js = self.b.addInstallFileWithDir(
.{ .path = comptime thisDir() ++ js_path },
self.install_dir,
fs.path.basename(js_path),
);
try install_js.step.make();
const watch_thread = try std.Thread.spawn(.{}, watch, .{self});
defer watch_thread.detach();
try self.runServer();
}
fn runServer(self: *Wasmserve) !void {
var server = net.StreamServer.init(.{ .reuse_address = true });
defer server.deinit();
try server.listen(self.address);
var addr_buf = @as([45]u8, undefined);
var fbs = std.io.fixedBufferStream(&addr_buf);
if (self.address.format("", .{}, fbs.writer())) {
std.log.info("Started listening at " ++ esc.cyan ++ esc.underline ++ "http://{s}" ++ esc.reset ++ "...", .{fbs.getWritten()});
} else |err| logErr(err, @src());
while (server.accept()) |conn| {
self.respond(conn) catch |err| {
logErr(err, @src());
continue;
};
} else |err| logErr(err, @src());
}
fn respond(self: *Wasmserve, conn: net.StreamServer.Connection) !void {
errdefer respondError(conn.stream, 500, "Internal Server Error") catch |err| logErr(err, @src());
var recv_buf: [buffer_size]u8 = undefined;
const first_line = conn.stream.reader().readUntilDelimiter(&recv_buf, '\n') catch |err| {
switch (err) {
error.StreamTooLong => try respondError(conn.stream, 414, "Too Long Request"),
else => try respondError(conn.stream, 400, "Bad Request"),
}
return;
};
var first_line_iter = mem.split(u8, first_line, " ");
_ = first_line_iter.next(); // skip method
if (first_line_iter.next()) |uri| {
if (uri[0] != '/') {
try respondError(conn.stream, 400, "Bad Request");
return;
}
const url = dropFragment(uri)[1..];
if (mem.eql(u8, url, "notify")) {
_ = try conn.stream.write("HTTP/1.1 200 OK\r\nConnection: Keep-Alive\r\nContent-Type: text/event-stream\r\nCache-Control: No-Cache\r\n\r\n");
self.subscriber = try self.b.allocator.create(net.StreamServer.Connection);
self.subscriber.?.* = conn;
return;
}
if (self.researchPath(url)) |file_path| {
try self.respondFile(conn.stream, file_path);
return;
} else |_| {}
try respondError(conn.stream, 404, "Not Found");
} else {
try respondError(conn.stream, 400, "Bad Request");
}
}
fn respondFile(self: Wasmserve, stream: net.Stream, path: []const u8) !void {
const ext = fs.path.extension(path);
var file_mime: []const u8 = "text/plain";
inline for (mime.mime_list) |entry| {
for (entry.ext) |ext_entry| {
if (std.mem.eql(u8, ext, ext_entry))
file_mime = entry.mime;
}
}
const file = try self.install_dir_iter.dir.openFile(path, .{});
defer file.close();
const file_size = try file.getEndPos();
try stream.writer().print(
"HTTP/1.1 200 OK\r\n" ++
"Connection: close\r\n" ++
"Content-Length: {d}\r\n" ++
"Content-Type: {s}\r\n" ++
"\r\n",
.{ file_size, file_mime },
);
const zero_iovec = &[0]std.os.iovec_const{};
var send_total: usize = 0;
while (true) {
const send_len = try std.os.sendfile(
stream.handle,
file.handle,
send_total,
file_size,
zero_iovec,
zero_iovec,
0,
);
if (send_len == 0)
break;
send_total += send_len;
}
}
fn respondError(stream: net.Stream, code: u32, desc: []const u8) !void {
try stream.writer().print(
"HTTP/1.1 {d} {s}\r\n" ++
"Connection: close\r\n" ++
"Content-Length: {d}\r\n" ++
"Content-Type: text/html\r\n" ++
"\r\n<!DOCTYPE html><html><body><h1>{s}</h1></body></html>",
.{ code, desc, desc.len + 50, desc },
);
}
fn researchPath(self: Wasmserve, path: []const u8) ![]const u8 {
var walker = try self.install_dir_iter.walk(self.b.allocator);
defer walker.deinit();
while (try walker.next()) |walk_entry| {
if (walk_entry.kind != .File) continue;
if (mem.eql(u8, walk_entry.path, path) or (path.len == 0 and mem.eql(u8, walk_entry.path, "index.html")))
return try self.b.allocator.dupe(u8, walk_entry.path);
}
return error.FileNotFound;
}
fn watch(self: *Wasmserve) void {
timer_loop: while (true) : (std.time.sleep(100 * std.time.ns_per_ms)) {
for (self.watch_paths) |path| {
var dir = fs.cwd().openIterableDir(path, .{}) catch {
if (self.checkForUpdate(path)) |is_updated| {
if (is_updated)
continue :timer_loop;
} else |err| logErr(err, @src());
continue;
};
defer dir.close();
var walker = dir.walk(self.b.allocator) catch |err| {
logErr(err, @src());
continue;
};
defer walker.deinit();
while (walker.next() catch |err| {
logErr(err, @src());
continue;
}) |walk_entry| {
if (walk_entry.kind != .File) continue;
if (self.checkForUpdate(walk_entry.path)) |is_updated| {
if (is_updated)
continue :timer_loop;
} else |err| {
logErr(err, @src());
continue;
}
}
}
}
}
fn checkForUpdate(self: *Wasmserve, path: []const u8) !bool {
const stat = try fs.cwd().statFile(path);
const entry = try self.mtimes.getOrPut(stat.inode);
if (entry.found_existing and stat.mtime > entry.value_ptr.*) {
std.log.info(esc.yellow ++ esc.underline ++ "{s}" ++ esc.reset ++ " updated", .{path});
self.compile();
entry.value_ptr.* = stat.mtime;
return true;
}
entry.value_ptr.* = stat.mtime;
return false;
}
fn notify(self: *Wasmserve, msg: NotifyMessage) void {
if (self.subscriber) |s|
_ = s.stream.writer().print("data: {s}\n\n", .{@tagName(msg)}) catch |err| logErr(err, @src());
}
fn compile(self: *Wasmserve) void {
std.log.info("Compiling...", .{});
self.exe_step.install_step.?.step.done_flag = false;
if (self.exe_step.install_step.?.step.make()) {
self.notify(.reload);
} else |err| {
logErr(err, @src());
}
}
};
fn dropFragment(input: []const u8) []const u8 {
for (input) |c, i|
if (c == '?' or c == '#')
return input[0..i];
return input;
}
fn logErr(err: anyerror, src: std.builtin.SourceLocation) void {
if (@errorReturnTrace()) |bt| {
std.log.err(esc.red ++ esc.bold ++ "{s}" ++ esc.reset ++ " >>>\n{s}", .{ @errorName(err), bt });
} else {
var file_name_buf: [1024]u8 = undefined;
var fba = std.heap.FixedBufferAllocator.init(&file_name_buf);
const allocator = fba.allocator();
const file_path = fs.path.relative(allocator, ".", src.file) catch @as([]const u8, src.file);
std.log.err(esc.red ++ esc.bold ++ "{s}" ++ esc.reset ++
" at " ++ esc.underline ++ "{s}:{d}:{d}" ++ esc.reset ++
esc.gray ++ " fn {s}()" ++ esc.reset, .{
@errorName(err),
file_path,
src.line,
src.column,
src.fn_name,
});
}
}
fn thisDir() []const u8 {
return fs.path.dirname(@src().file) orelse ".";
}

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tools/wasmserve/www/wasmserve.js Normal file
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let evtSource = new EventSource("/notify");
function setup() {
evtSource.addEventListener("message", function (e) {
if (e.data === "reload") {
window.location.reload();
}
});
}
export default setup;

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www/template.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<script type="module">
import {{ mach }} from "./mach.js";
import {{ zig }} from "./mach-sysjs.js";
let imports = {{
env: {{ ...mach, ...zig }},
}};
fetch("{s}.wasm")
.then(response => response.arrayBuffer())
.then(buffer => WebAssembly.instantiate(buffer, imports))
.then(results => results.instance)
.then(instance => {{
zig.init(instance);
mach.init(instance);
instance.exports.wasmInit();
let frame = true;
let last_update_time = performance.now();
let update = function() {{
if (!frame) return;
if (mach.machHasEvent() ||
(last_update_time + (mach.wait_event_timeout * 1000)) <= performance.now()) {{
instance.exports.wasmUpdate();
last_update_time = performance.now();
}}
window.requestAnimationFrame(update);
}};
window.requestAnimationFrame(update);
window.addEventListener("mach-close", () => {{
instance.exports.wasmDeinit();
frame = false;
}});
}})
.catch(err => console.error(err));
</script>
</body>
</html>