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build.zig
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build.zig
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const std = @import("std");
pub fn build(b: *std.build.Builder) !void {
// Standard target options allows the person running `zig build` to choose
// what target to build for. Here we do not override the defaults, which
// means any target is allowed, and the default is native. Other options
// for restricting supported target set are available.
const target = b.standardTargetOptions(.{});
// Standard release options allow the person running `zig build` to select
// between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
const mode = b.standardReleaseOptions();
const xwayland = b.option(
bool,
"xwayland",
"Set to true to enable xwayland support",
) orelse false;
const man_pages = b.option(
bool,
"man-pages",
"Set to true to build man pages. Requires scdoc. Defaults to true if scdoc is found.",
) orelse scdoc_found: {
_ = b.findProgram(&[_][]const u8{"scdoc"}, &[_][]const u8{}) catch |err| switch (err) {
error.FileNotFound => break :scdoc_found false,
else => return err,
};
break :scdoc_found true;
};
const examples = b.option(
bool,
"examples",
"Set to true to build examples",
) orelse false;
const scan_protocols = ScanProtocolsStep.create(b);
{
const river = b.addExecutable("river", "river/main.zig");
river.setTarget(target);
river.setBuildMode(mode);
river.addBuildOption(bool, "xwayland", xwayland);
addProtocolDeps(river, &scan_protocols.step);
addServerDeps(river);
river.install();
const run_cmd = river.run();
run_cmd.step.dependOn(b.getInstallStep());
const run_step = b.step("run", "Run the compositor");
run_step.dependOn(&run_cmd.step);
}
{
const riverctl = b.addExecutable("riverctl", "riverctl/main.zig");
riverctl.setTarget(target);
riverctl.setBuildMode(mode);
addProtocolDeps(riverctl, &scan_protocols.step);
riverctl.linkLibC();
riverctl.linkSystemLibrary("wayland-client");
riverctl.install();
}
{
const rivertile = b.addExecutable("rivertile", "rivertile/main.zig");
rivertile.setTarget(target);
rivertile.setBuildMode(mode);
rivertile.install();
}
if (man_pages) {
const scdoc_step = ScdocStep.create(b);
try scdoc_step.install();
}
if (examples) {
const status = b.addExecutable("status", "example/status.zig");
status.setTarget(target);
status.setBuildMode(mode);
addProtocolDeps(status, &scan_protocols.step);
status.linkLibC();
status.linkSystemLibrary("wayland-client");
status.install();
}
{
const river_test = b.addTest("river/test_main.zig");
river_test.setTarget(target);
river_test.setBuildMode(mode);
river_test.addBuildOption(bool, "xwayland", xwayland);
addProtocolDeps(river_test, &scan_protocols.step);
addServerDeps(river_test);
const test_step = b.step("test", "Run the tests");
test_step.dependOn(&river_test.step);
}
}
fn addServerDeps(exe: *std.build.LibExeObjStep) void {
exe.addCSourceFile("include/bindings.c", &[_][]const u8{"-std=c99"});
exe.addIncludeDir(".");
exe.linkLibC();
exe.linkSystemLibrary("libevdev");
exe.linkSystemLibrary("pixman-1");
exe.linkSystemLibrary("wayland-server");
exe.linkSystemLibrary("wlroots");
exe.linkSystemLibrary("xkbcommon");
}
fn addProtocolDeps(exe: *std.build.LibExeObjStep, protocol_step: *std.build.Step) void {
exe.step.dependOn(protocol_step);
exe.addIncludeDir("protocol");
exe.addCSourceFile("protocol/river-control-unstable-v1-protocol.c", &[_][]const u8{"-std=c99"});
exe.addCSourceFile("protocol/river-status-unstable-v1-protocol.c", &[_][]const u8{"-std=c99"});
}
const ScanProtocolsStep = struct {
builder: *std.build.Builder,
step: std.build.Step,
fn create(builder: *std.build.Builder) *ScanProtocolsStep {
const self = builder.allocator.create(ScanProtocolsStep) catch @panic("out of memory");
self.* = init(builder);
return self;
}
fn init(builder: *std.build.Builder) ScanProtocolsStep {
return ScanProtocolsStep{
.builder = builder,
.step = std.build.Step.init("Scan Protocols", builder.allocator, make),
};
}
fn make(step: *std.build.Step) !void {
const self = @fieldParentPtr(ScanProtocolsStep, "step", step);
const protocol_dir = std.fmt.trim(try self.builder.exec(
&[_][]const u8{ "pkg-config", "--variable=pkgdatadir", "wayland-protocols" },
));
const protocol_dir_paths = [_][]const []const u8{
&[_][]const u8{ protocol_dir, "stable/xdg-shell/xdg-shell.xml" },
&[_][]const u8{ "protocol", "wlr-layer-shell-unstable-v1.xml" },
&[_][]const u8{ "protocol", "river-control-unstable-v1.xml" },
&[_][]const u8{ "protocol", "river-status-unstable-v1.xml" },
};
const server_protocols = [_][]const u8{
"xdg-shell",
"wlr-layer-shell-unstable-v1",
"river-control-unstable-v1",
"river-status-unstable-v1",
};
const client_protocols = [_][]const u8{
"river-control-unstable-v1",
"river-status-unstable-v1",
};
for (protocol_dir_paths) |dir_path| {
const xml_in_path = try std.fs.path.join(self.builder.allocator, dir_path);
// Extension is .xml, so slice off the last 4 characters
const basename = std.fs.path.basename(xml_in_path);
const basename_no_ext = basename[0..(basename.len - 4)];
const code_out_path = try std.mem.concat(
self.builder.allocator,
u8,
&[_][]const u8{ "protocol/", basename_no_ext, "-protocol.c" },
);
_ = try self.builder.exec(
&[_][]const u8{ "wayland-scanner", "private-code", xml_in_path, code_out_path },
);
for (server_protocols) |server_protocol| {
if (std.mem.eql(u8, basename_no_ext, server_protocol)) {
const header_out_path = try std.mem.concat(
self.builder.allocator,
u8,
&[_][]const u8{ "protocol/", basename_no_ext, "-protocol.h" },
);
_ = try self.builder.exec(
&[_][]const u8{ "wayland-scanner", "server-header", xml_in_path, header_out_path },
);
}
}
for (client_protocols) |client_protocol| {
if (std.mem.eql(u8, basename_no_ext, client_protocol)) {
const header_out_path = try std.mem.concat(
self.builder.allocator,
u8,
&[_][]const u8{ "protocol/", basename_no_ext, "-client-protocol.h" },
);
_ = try self.builder.exec(
&[_][]const u8{ "wayland-scanner", "client-header", xml_in_path, header_out_path },
);
}
}
}
}
};
const ScdocStep = struct {
const scd_paths = [_][]const u8{
"doc/river.1.scd",
"doc/riverctl.1.scd",
"doc/rivertile.1.scd",
"doc/river-layouts.7.scd",
};
builder: *std.build.Builder,
step: std.build.Step,
fn create(builder: *std.build.Builder) *ScdocStep {
const self = builder.allocator.create(ScdocStep) catch @panic("out of memory");
self.* = init(builder);
return self;
}
fn init(builder: *std.build.Builder) ScdocStep {
return ScdocStep{
.builder = builder,
.step = std.build.Step.init("Generate man pages", builder.allocator, make),
};
}
fn make(step: *std.build.Step) !void {
const self = @fieldParentPtr(ScdocStep, "step", step);
for (scd_paths) |path| {
const command = try std.fmt.allocPrint(
self.builder.allocator,
"scdoc < {} > {}",
.{ path, path[0..(path.len - 4)] },
);
_ = try self.builder.exec(&[_][]const u8{ "sh", "-c", command });
}
}
fn install(self: *ScdocStep) !void {
self.builder.getInstallStep().dependOn(&self.step);
for (scd_paths) |path| {
const path_no_ext = path[0..(path.len - 4)];
const basename_no_ext = std.fs.path.basename(path_no_ext);
const section = path_no_ext[(path_no_ext.len - 1)..];
const output = try std.fmt.allocPrint(
self.builder.allocator,
"share/man/man{}/{}",
.{ section, basename_no_ext },
);
self.builder.installFile(path_no_ext, output);
}
}
};