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code: port riverctl to zig-wayland

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This commit is contained in:
Isaac Freund 2020-11-02 13:59:59 +01:00
parent a895970561
commit a7459026f6
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4 changed files with 66 additions and 84 deletions
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6
README.md
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@ -20,6 +20,12 @@ separate `riverctl` binary implementing it.
## Building ## Building
On cloning the repository, you must init and update the submodules as well with e.g.
```
git submodule update --init
```
To compile river first ensure that you have the following dependencies To compile river first ensure that you have the following dependencies
installed: installed:

26
build.zig
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@ -1,5 +1,7 @@
const std = @import("std"); const std = @import("std");
const ScanProtocolsStep = @import("deps/zig-wayland/build.zig").ScanProtocolsStep;
pub fn build(b: *std.build.Builder) !void { pub fn build(b: *std.build.Builder) !void {
// Standard target options allows the person running `zig build` to choose // Standard target options allows the person running `zig build` to choose
// what target to build for. Here we do not override the defaults, which // what target to build for. Here we do not override the defaults, which
@ -35,7 +37,11 @@ pub fn build(b: *std.build.Builder) !void {
"Set to true to build examples", "Set to true to build examples",
) orelse false; ) orelse false;
const scan_protocols = ScanProtocolsStep.create(b); // TODO: port all parts of river to zig-wayland and delete this
const scan_protocols = OldScanProtocolsStep.create(b);
const scanner = ScanProtocolsStep.create(b, "deps/zig-wayland/");
scanner.addProtocolPath("protocol/river-control-unstable-v1.xml");
{ {
const river = b.addExecutable("river", "river/main.zig"); const river = b.addExecutable("river", "river/main.zig");
@ -60,11 +66,13 @@ pub fn build(b: *std.build.Builder) !void {
riverctl.setTarget(target); riverctl.setTarget(target);
riverctl.setBuildMode(mode); riverctl.setBuildMode(mode);
addProtocolDeps(riverctl, &scan_protocols.step); riverctl.step.dependOn(&scanner.step);
riverctl.addPackage(scanner.getPkg());
riverctl.linkLibC(); riverctl.linkLibC();
riverctl.linkSystemLibrary("wayland-client"); riverctl.linkSystemLibrary("wayland-client");
scanner.addCSource(riverctl);
riverctl.install(); riverctl.install();
} }
@ -126,25 +134,25 @@ fn addProtocolDeps(exe: *std.build.LibExeObjStep, protocol_step: *std.build.Step
exe.addCSourceFile("protocol/river-status-unstable-v1-protocol.c", &[_][]const u8{"-std=c99"}); exe.addCSourceFile("protocol/river-status-unstable-v1-protocol.c", &[_][]const u8{"-std=c99"});
} }
const ScanProtocolsStep = struct { const OldScanProtocolsStep = struct {
builder: *std.build.Builder, builder: *std.build.Builder,
step: std.build.Step, step: std.build.Step,
fn create(builder: *std.build.Builder) *ScanProtocolsStep { fn create(builder: *std.build.Builder) *OldScanProtocolsStep {
const self = builder.allocator.create(ScanProtocolsStep) catch @panic("out of memory"); const self = builder.allocator.create(OldScanProtocolsStep) catch @panic("out of memory");
self.* = init(builder); self.* = init(builder);
return self; return self;
} }
fn init(builder: *std.build.Builder) ScanProtocolsStep { fn init(builder: *std.build.Builder) OldScanProtocolsStep {
return ScanProtocolsStep{ return OldScanProtocolsStep{
.builder = builder, .builder = builder,
.step = std.build.Step.init(.Custom, "Scan Protocols", builder.allocator, make), .step = std.build.Step.init(.Custom, "Scan Protocols", builder.allocator, make),
}; };
} }
fn make(step: *std.build.Step) !void { fn make(step: *std.build.Step) !void {
const self = @fieldParentPtr(ScanProtocolsStep, "step", step); const self = @fieldParentPtr(OldScanProtocolsStep, "step", step);
const protocol_dir = std.fmt.trim(try self.builder.exec( const protocol_dir = std.fmt.trim(try self.builder.exec(
&[_][]const u8{ "pkg-config", "--variable=pkgdatadir", "wayland-protocols" }, &[_][]const u8{ "pkg-config", "--variable=pkgdatadir", "wayland-protocols" },

2
deps/zig-wayland vendored

@ -1 +1 @@
Subproject commit f335337bca742c8f0181798be75de65bfb4e8283 Subproject commit d0fcd31b54c930d58267ebaf03a898c2d01ccfa4

116
riverctl/main.zig
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@ -17,97 +17,65 @@
const std = @import("std"); const std = @import("std");
const c = @cImport({ const wayland = @import("wayland");
@cInclude("wayland-client.h"); const wl = wayland.client.wl;
@cInclude("river-control-unstable-v1-client-protocol.h"); const river = wayland.client.river;
});
const wl_registry_listener = c.wl_registry_listener{ const SetupContext = struct {
.global = handleGlobal, river_control: ?*river.ControlV1 = null,
.global_remove = handleGlobalRemove, seat: ?*wl.Seat = null,
}; };
const command_callback_listener = c.zriver_command_callback_v1_listener{
.success = handleSuccess,
.failure = handleFailure,
};
var river_control_optional: ?*c.zriver_control_v1 = null;
var wl_seat_optional: ?*c.wl_seat = null;
pub fn main() !void { pub fn main() !void {
const wl_display = c.wl_display_connect(null) orelse return error.ConnectError; const display = try wl.Display.connect(null);
const wl_registry = c.wl_display_get_registry(wl_display); const registry = try display.getRegistry();
if (c.wl_registry_add_listener(wl_registry, &wl_registry_listener, null) < 0) unreachable; var context = SetupContext{};
if (c.wl_display_roundtrip(wl_display) < 0) return error.RoundtripFailed;
const river_control = river_control_optional orelse return error.RiverControlNotAdvertised; registry.setListener(*SetupContext, registryListener, &context) catch unreachable;
const wl_seat = wl_seat_optional orelse return error.SeatNotAdverstised; _ = try display.roundtrip();
const river_control = context.river_control orelse return error.RiverControlNotAdvertised;
const seat = context.seat orelse return error.SeatNotAdverstised;
// Skip our name, send all other args // Skip our name, send all other args
// This next line is needed cause of https://github.com/ziglang/zig/issues/2622 // This next line is needed cause of https://github.com/ziglang/zig/issues/2622
const args = std.os.argv; const args = std.os.argv;
for (args[1..]) |arg| c.zriver_control_v1_add_argument(river_control, arg); for (args[1..]) |arg| river_control.addArgument(arg);
const command_callback = c.zriver_control_v1_run_command(river_control, wl_seat); const callback = try river_control.runCommand(seat);
if (c.zriver_command_callback_v1_add_listener(
command_callback, callback.setListener(?*c_void, callbackListener, null) catch unreachable;
&command_callback_listener,
null,
) < 0) unreachable;
// Loop until our callback is called and we exit. // Loop until our callback is called and we exit.
while (true) if (c.wl_display_dispatch(wl_display) < 0) return error.DispatchFailed; while (true) _ = try display.dispatch();
} }
fn handleGlobal( fn registryListener(registry: *wl.Registry, event: wl.Registry.Event, context: *SetupContext) void {
data: ?*c_void, switch (event) {
wl_registry: ?*c.wl_registry, .global => |global| {
name: u32, if (context.seat == null and std.cstr.cmp(global.interface, wl.Seat.interface().name) == 0) {
interface: ?[*:0]const u8, context.seat = registry.bind(global.name, wl.Seat, 1) catch return;
version: u32, } else if (std.cstr.cmp(global.interface, river.ControlV1.interface().name) == 0) {
) callconv(.C) void { context.river_control = registry.bind(global.name, river.ControlV1, 1) catch return;
// We only care about the river_control global }
if (std.cstr.cmp(interface.?, @ptrCast([*:0]const u8, c.zriver_control_v1_interface.name.?)) == 0) { },
river_control_optional = @ptrCast( .global_remove => {},
*c.zriver_control_v1,
c.wl_registry_bind(wl_registry, name, &c.zriver_control_v1_interface, 1),
);
} else if (std.cstr.cmp(interface.?, @ptrCast([*:0]const u8, c.wl_seat_interface.name.?)) == 0) {
// river does not yet support multi-seat, so just use the first
// (and only) seat advertised
wl_seat_optional = @ptrCast(
*c.wl_seat,
c.wl_registry_bind(wl_registry, name, &c.wl_seat_interface, 1),
);
} }
} }
/// Ignore the event fn callbackListener(callback: *river.CommandCallbackV1, event: river.CommandCallbackV1.Event, _: ?*c_void) void {
fn handleGlobalRemove(data: ?*c_void, wl_registry: ?*c.wl_registry, name: u32) callconv(.C) void {} switch (event) {
.success => |success| {
/// Print the output of the command if any and exit if (std.mem.len(success.output) > 0) {
fn handleSuccess( const stdout = std.io.getStdOut().outStream();
data: ?*c_void, stdout.print("{}\n", .{success.output}) catch @panic("failed to write to stdout");
callback: ?*c.zriver_command_callback_v1, }
output: ?[*:0]const u8, std.os.exit(0);
) callconv(.C) void { },
if (std.mem.len(output.?) > 0) { .failure => |failure| {
const stdout = std.io.getStdOut().outStream(); std.debug.print("Error: {}\n", .{failure.failure_message});
stdout.print("{}\n", .{output}) catch @panic("failed to write to stdout"); std.os.exit(1);
},
} }
std.os.exit(0);
}
/// Print the failure message and exit non-zero
fn handleFailure(
data: ?*c_void,
callback: ?*c.zriver_command_callback_v1,
failure_message: ?[*:0]const u8,
) callconv(.C) void {
if (failure_message) |message| {
std.debug.warn("Error: {}\n", .{failure_message});
}
std.os.exit(1);
} }