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mach: build: Implement run step for wasm applications

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This actually compiles and runs a http server (based on apple_pie) and
uses xdg-open (on unixes) and open (on rest) to launch the browser.

The steps actually take place in reverse order because running a web
server would block the current process (limitation of RunStep). Hence we
are assuming that (xdg-)open is just a launcher and would take a while
to open the browser application.
This commit is contained in:
iddev5 2022-05-27 13:04:52 +05:30 • committed by Stephen Gutekanst
parent 84af4e118c
commit e7f7737cc8
1 changed files with 29 additions and 8 deletions
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29
build.zig
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@ -1,4 +1,5 @@
const std = @import("std");
const builtin = @import("builtin");
pub const gpu = @import("gpu/build.zig");
const gpu_dawn = @import("gpu-dawn/build.zig");
pub const glfw = @import("glfw/build.zig");
@ -64,13 +65,11 @@ pub fn build(b: *std.build.Builder) void {
const example_compile_step = b.step("example-" ++ example.name, "Compile '" ++ example.name ++ "' example");
example_compile_step.dependOn(&example_app.getInstallStep().?.step);
if (target.toTarget().cpu.arch != .wasm32) {
const example_run_cmd = example_app.run();
example_run_cmd.step.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);
}
}
if (target.toTarget().cpu.arch != .wasm32) {
const shaderexp_app = App.init(
@ -218,10 +217,32 @@ pub const App = struct {
}
pub fn run(app: *const App) *std.build.RunStep {
if (app.step.target.toTarget().cpu.arch != .wasm32) {
if (app.step.target.toTarget().cpu.arch == .wasm32) {
const http_server = app.b.addExecutable("http-server", "tools/http-server.zig");
http_server.addPackage(.{
.name = "apple_pie",
.path = .{ .path = "tools/libs/apple_pie/src/apple_pie.zig" },
});
const launch = app.b.addSystemCommand(&.{
switch (builtin.os.tag) {
.macos, .windows => "open",
else => "xdg-open", // Assume linux-like
},
// TODO: use actual application name
"http://127.0.0.1:8000/application.html",
});
launch.step.dependOn(&app.step.install_step.?.step);
const serve = http_server.run();
serve.addArg("application");
serve.step.dependOn(&launch.step);
serve.cwd = app.b.getInstallPath(web_install_dir, "");
return serve;
} else {
return app.step.run();
}
unreachable;
}
};