all: remove deprecated packages

Closes #24.

Signed-off-by: Ophestra <cat@gensokyo.uk>

system/wayland/deprecated.go

@@ -1,144 +0,0 @@
-// Package wayland exposes the internal/wayland package.
-//
-// Deprecated: This package will be removed in 0.4.
-package wayland
-
-import (
-	"errors"
-	"net"
-	"os"
-	"runtime"
-	"sync"
-	"syscall"
-	_ "unsafe" // for go:linkname
-
-	"hakurei.app/internal/wayland"
-)
-
-//go:linkname bindWaylandFd hakurei.app/internal/wayland.bindWaylandFd
-func bindWaylandFd(socketPath string, fd uintptr, appID, instanceID string, syncFd uintptr) error
-
-// Conn represents a connection to the wayland display server.
-//
-// Deprecated: this interface is being replaced.
-// Additionally, the package it belongs to will be removed in 0.4.
-type Conn struct {
-	conn *net.UnixConn
-
-	done     chan struct{}
-	doneOnce sync.Once
-
-	mu sync.Mutex
-}
-
-// Attach connects Conn to a wayland socket.
-func (c *Conn) Attach(p string) (err error) {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	if c.conn != nil {
-		return errors.New("socket already attached")
-	}
-
-	c.conn, err = net.DialUnix("unix", nil, &net.UnixAddr{Name: p, Net: "unix"})
-	return
-}
-
-// Close releases resources and closes the connection to the wayland compositor.
-func (c *Conn) Close() error {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	if c.done == nil {
-		return errors.New("no socket bound")
-	}
-
-	c.doneOnce.Do(func() {
-		c.done <- struct{}{}
-		<-c.done
-	})
-
-	// closed by wayland
-	runtime.SetFinalizer(c.conn, nil)
-	return nil
-}
-
-// Bind binds the new socket to pathname.
-func (c *Conn) Bind(pathname, appID, instanceID string) (*os.File, error) {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	if c.conn == nil {
-		return nil, errors.New("socket not attached")
-	}
-	if c.done != nil {
-		return nil, errors.New("socket already bound")
-	}
-
-	if rc, err := c.conn.SyscallConn(); err != nil {
-		// unreachable
-		return nil, err
-	} else {
-		c.done = make(chan struct{})
-		if closeFds, err := bindRawConn(c.done, rc, pathname, appID, instanceID); err != nil {
-			return nil, err
-		} else {
-			return os.NewFile(uintptr(closeFds[1]), "close_fd"), nil
-		}
-	}
-}
-
-func bindRawConn(done chan struct{}, rc syscall.RawConn, p, appID, instanceID string) ([2]int, error) {
-	var closeFds [2]int
-	if err := syscall.Pipe2(closeFds[0:], syscall.O_CLOEXEC); err != nil {
-		return closeFds, err
-	}
-
-	setupDone := make(chan error, 1) // does not block with c.done
-
-	go func() {
-		if err := rc.Control(func(fd uintptr) {
-			// allow the Bind method to return after setup
-			setupDone <- bind(fd, p, appID, instanceID, uintptr(closeFds[1]))
-			close(setupDone)
-
-			// keep socket alive until done is requested
-			<-done
-		}); err != nil {
-			setupDone <- err
-		}
-
-		// notify Close that rc.Control has returned
-		close(done)
-	}()
-
-	// return write end of the pipe
-	return closeFds, <-setupDone
-}
-
-func bind(fd uintptr, p, appID, instanceID string, syncFd uintptr) error {
-	// ensure p is available
-	if f, err := os.Create(p); err != nil {
-		return err
-	} else if err = f.Close(); err != nil {
-		return err
-	} else if err = os.Remove(p); err != nil {
-		return err
-	}
-
-	return bindWaylandFd(p, fd, appID, instanceID, syncFd)
-}
-
-const (
-	// WaylandDisplay contains the name of the server socket
-	// (https://gitlab.freedesktop.org/wayland/wayland/-/blob/1.23.1/src/wayland-client.c#L1147)
-	// which is concatenated with XDG_RUNTIME_DIR
-	// (https://gitlab.freedesktop.org/wayland/wayland/-/blob/1.23.1/src/wayland-client.c#L1171)
-	// or used as-is if absolute
-	// (https://gitlab.freedesktop.org/wayland/wayland/-/blob/1.23.1/src/wayland-client.c#L1176).
-	WaylandDisplay = wayland.Display
-
-	// FallbackName is used as the wayland socket name if WAYLAND_DISPLAY is unset
-	// (https://gitlab.freedesktop.org/wayland/wayland/-/blob/1.23.1/src/wayland-client.c#L1149).
-	FallbackName = wayland.FallbackName
-)