public (PreviewerSession session, string error) GetPreviewerSession()
{
if (_previewer != null && _previewer.IsAlive)
{
return(_previewer, null);
}
var project = _workspace.FindProjectWithXamlFile(_path);
if (project == null)
{
return(null, $"Can't resolve C# project for file {_path}");
}
if (project.TargetPath == null)
{
return(null, $"Can't resolve TargetPath for {project.Name}");
}
if (!File.Exists(project.TargetPath))
{
return(null, $"Can't find {project.TargetPath}, make sure to compile your project");
}
var s = PreviewerSessionConnector.Start(project.TargetPath);
if (s.session == null)
{
return(s);
}
_previewer = s.session;
_previewerAssemblyPath = project.TargetPath;
s.session.UpdateXaml(_xaml, project.TargetPath);
return(s);
}
public static (PreviewerSession session, string error) Start(string targetAssembly)
{
targetAssembly =
"/home/kekekeks/Projects/AvaloniaMaster/samples/ControlCatalog.NetCore/bin/Debug/netcoreapp2.0/ControlCatalog.NetCore.dll";
string targetDir = Path.GetDirectoryName(targetAssembly);
string targetBasePath = Path.Combine(targetDir, Path.GetFileNameWithoutExtension(targetAssembly));
var previewerPath = Path.Combine(targetDir, PreviewerDllName);
if (!File.Exists(previewerPath))
{
previewerPath = null;
var depsJsonPath = Path.Combine(targetDir,
Path.GetFileNameWithoutExtension(targetAssembly) + ".deps.json");
if (File.Exists(depsJsonPath))
{
var avaloniaDll = DepsJsonAssemblyListLoader.ParseFile(depsJsonPath)
.FirstOrDefault(x => x.EndsWith("Avalonia.dll"));
if (avaloniaDll != null)
{
previewerPath = Path.Combine(Path.GetDirectoryName(avaloniaDll), PreviewerPackagePath);
if (!File.Exists(previewerPath))
{
previewerPath = null;
}
}
}
}
if (previewerPath == null)
{
return(null, "Unable to locate Avalonia.Designer.HostApp.dll");
}
Process proc = null;
try
{
using (var l = new OneShotTcpServer())
{
var cmdline =
$@"exec --runtimeconfig {targetBasePath}.runtimeconfig.json --depsfile {
targetBasePath
}.deps.json {previewerPath} --transport tcp-bson://127.0.0.1:{l.Port}/ {targetAssembly}";
proc = Process.Start(new ProcessStartInfo("dotnet", cmdline)
{
UseShellExecute = false
});
var client = l.WaitForOneConnection(new TimeSpan(0, 0, 30));
PreviewerSession session = null;
var transport = BsonTransportHack.CreateBsonTransport(client.GetStream(), () =>
{
client.Dispose();
session?.OnTransportDisconnected();
});
session = new PreviewerSession(transport, () =>
{
try
{
proc.Kill();
}
catch
{
}
});
return(session, null);
}
}
catch (Exception e)
{
try
{
proc?.Kill();
}
catch
{
//Ignore
}
proc?.Dispose();
return(null, "Unable to establish previewer transport connection: " + e);
}
return(null, null);
}