Fix docker socket mount for Windows

Author: anisaoshafi

internal/runtime/docker.go

@@ -72,10 +72,19 @@ func probeSocket(candidates ...string) string {
 }
 
 func (d *DockerRuntime) SocketPath() string {
-	host := d.client.DaemonHost()
+	return socketPathFromHost(d.client.DaemonHost())
+}
+
+// Resolves the host-side Docker socket path to bind-mount into containers.
+// On Unix, it strips the unix:// prefix. On Windows, Docker Desktop connects via a named pipe
+// but exposes the socket at /var/run/docker.sock for Linux containers to bind-mount (via WSL2).
+func socketPathFromHost(host string) string {
 	if strings.HasPrefix(host, "unix://") {
 		return strings.TrimPrefix(host, "unix://")
 	}
+	if strings.HasPrefix(host, "npipe://") {
+		return "/var/run/docker.sock"
+	}
 	return ""
 }
 

internal/runtime/docker_test.go

@@ -56,6 +56,14 @@ func TestSocketPath_ReturnsEmptyForTCPHost(t *testing.T) {
 	assert.Equal(t, "", rt.SocketPath())
 }
 
+func TestSocketPathFromHost_ReturnsDockerSockForWindowsNamedPipe(t *testing.T) {
+	assert.Equal(t, "/var/run/docker.sock", socketPathFromHost("npipe:////./pipe/docker_engine"))
+}
+
+func TestSocketPathFromHost_ExtractsUnixPath(t *testing.T) {
+	assert.Equal(t, "/var/run/docker.sock", socketPathFromHost("unix:///var/run/docker.sock"))
+}
+
 func TestWindowsDockerStartCommand_DockerAvailable(t *testing.T) {
 	lookPath := func(string) (string, error) { return "/usr/bin/docker", nil }
 	assert.Equal(t, "docker desktop start", windowsDockerStartCommand(func(string) string { return "" }, lookPath))