Remove windows workarounds for statting sockets

See: golang/go#33357

Go 1.22 has made it so that os.Stat now follows all reparse points, of which IO_REPARSE_TAG_AF_UNIX (the reparse point that os.ModeSocket should have been triggering) is one

internal/socket/client.go

@@ -9,7 +9,6 @@ import (
 	"net"
 	"net/http"
 	"os"
-	"runtime"
 )
 
 // Error response is the response body for any errors that occur
@@ -37,17 +36,12 @@ type Client struct {
 // NewClient creates a new Client. The context is used for an internal check
 // that the socket can be dialled.
 func NewClient(ctx context.Context, path, token string) (*Client, error) {
-	// Check the socket path exists and is a socket.
-	// Note that os.ModeSocket might not be set on Windows.
-	// (https://github.com/golang/go/issues/33357)
-	if runtime.GOOS != "windows" {
-		fi, err := os.Stat(path)
-		if err != nil {
-			return nil, fmt.Errorf("stat socket: %w", err)
-		}
-		if fi.Mode()&os.ModeSocket == 0 {
-			return nil, fmt.Errorf("%q is not a socket", path)
-		}
+	fi, err := os.Stat(path)
+	if err != nil {
+		return nil, fmt.Errorf("stat socket: %w", err)
+	}
+	if fi.Mode()&os.ModeSocket == 0 {
+		return nil, fmt.Errorf("%q is not a socket", path)
 	}
 
 	dialer := net.Dialer{}

internal/socket/server_test.go

@@ -9,7 +9,6 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
-	"runtime"
 	"sync/atomic"
 	"testing"
 	"time"
@@ -52,18 +51,13 @@ func TestServerStartStop(t *testing.T) {
 		t.Fatalf("srv.Start() = %v", err)
 	}
 
-	// Check the socket path exists and is a socket.
-	// Note that os.ModeSocket might not be set on Windows.
-	// (https://github.com/golang/go/issues/33357)
-	if runtime.GOOS != "windows" {
-		fi, err := os.Stat(sockPath)
-		if err != nil {
-			t.Fatalf("os.Stat(%q) = %v", sockPath, err)
-		}
-
-		if fi.Mode()&os.ModeSocket == 0 {
-			t.Fatalf("%q is not a socket", sockPath)
-		}
+	fi, err := os.Stat(sockPath)
+	if err != nil {
+		t.Fatalf("os.Stat(%q) = %v", sockPath, err)
+	}
+
+	if fi.Mode()&os.ModeSocket == 0 {
+		t.Fatalf("%q is not a socket", sockPath)
 	}
 
 	// Try to connect to the socket.

internal/socket/utils.go

@@ -12,13 +12,8 @@ import (
 	"strings"
 )
 
-// socketExists returns true if the socket path exists on linux and darwin
-// on windows it always returns false, because of https://github.com/golang/go/issues/33357 (stat on sockets is broken on windows)
+// socketExists returns true if the socket path exists
 func socketExists(path string) (bool, error) {
-	if runtime.GOOS == "windows" {
-		return false, nil
-	}
-
 	_, err := os.Stat(path)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {

jobapi/server_test.go

@@ -100,10 +100,6 @@ func TestServerStartStop(t *testing.T) {
 }
 
 func TestServerStartStop_WithPreExistingSocket(t *testing.T) {
-	if runtime.GOOS == "windows" {
-		t.Skip("socket collision detection isn't support on windows. If the current go version is >1.23, it might be worth re-enabling this test, because hopefully the bug (https://github.com/golang/go/issues/33357) is fixed")
-	}
-
 	sockName := filepath.Join(os.TempDir(), "test-socket-collision.sock")
 	srv1, _, err := jobapi.NewServer(shell.TestingLogger{T: t}, sockName, env.New())
 	if err != nil {