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293 lines (243 loc) · 11 KB
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/*----------------------------------------------------------
This Source Code Form is subject to the terms of the
Mozilla Public License, v.2.0. If a copy of the MPL
was not distributed with this file, You can obtain one
at http://mozilla.org/MPL/2.0/.
----------------------------------------------------------*/
using ScriptEngine.Machine;
using ScriptEngine.Machine.Contexts;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using OneScript.Commons;
using OneScript.Compilation;
using OneScript.Contexts;
using OneScript.Exceptions;
using OneScript.Execution;
using OneScript.Values;
using ScriptEngine.Libraries;
namespace ScriptEngine.HostedScript
{
public class LibraryLoader : AutoScriptDrivenObject<LibraryLoader>
{
private readonly IRuntimeEnvironment _env;
private readonly ILibraryManager _libManager;
private readonly ScriptingEngine _engine;
private readonly bool _customized;
private readonly Stack<LibraryLoadingContext> _librariesInProgress = new Stack<LibraryLoadingContext>();
private struct DelayLoadedScriptData
{
public string path;
public string identifier;
public bool asClass;
}
private class LibraryLoadingContext
{
public LibraryLoadingContext(ExternalLibraryInfo library)
{
this.Library = library;
}
public readonly ExternalLibraryInfo Library;
public readonly List<DelayLoadedScriptData> delayLoadedScripts = new List<DelayLoadedScriptData>();
}
private LibraryLoader(IExecutableModule moduleHandle,
IRuntimeEnvironment env,
ILibraryManager libManager,
ScriptingEngine engine, IBslProcess process): base(moduleHandle)
{
_env = env;
_libManager = libManager;
_engine = engine;
_customized = true;
_engine.InitializeSDO(this, process);
}
private LibraryLoader(IRuntimeEnvironment env,
ILibraryManager libManager,
ScriptingEngine engine)
{
_env = env;
_libManager = libManager;
_engine = engine;
_customized = false;
}
#region Static part
public static LibraryLoader Create(ScriptingEngine engine, string processingScript, IBslProcess process)
{
var compiler = engine.GetCompilerService();
var code = engine.Loader.FromFile(processingScript);
var module = CompileModule(compiler, code, typeof(LibraryLoader), process);
return new LibraryLoader(module, engine.Environment, engine.LibraryManager, engine, process);
}
public static LibraryLoader Create(ScriptingEngine engine, IBslProcess process)
{
return new LibraryLoader(engine.Environment, engine.LibraryManager, engine);
}
#endregion
[ContextMethod("ДобавитьКласс","AddClass")]
public void AddClass(string file, string className)
{
if (!Utils.IsValidIdentifier(className))
throw RuntimeException.InvalidArgumentValue();
_librariesInProgress.Peek().delayLoadedScripts.Add(new DelayLoadedScriptData()
{
path = file,
identifier = className,
asClass = true
});
}
[ContextMethod("ДобавитьМодуль", "AddModule")]
public void AddModule(IBslProcess process, string file, string moduleName)
{
if (!Utils.IsValidIdentifier(moduleName))
throw RuntimeException.InvalidArgumentValue();
_librariesInProgress.Peek().delayLoadedScripts.Add(new DelayLoadedScriptData()
{
path = file,
identifier = moduleName,
asClass = false
});
try
{
TraceLoadLibrary(
Locale.NStr($"ru = 'Загружаю модуль ={moduleName}= в область видимости из файла {file}';"+
$"en = 'Load module ={moduleName}= in to context from file {file}'")
);
_env.InjectGlobalProperty(BslUndefinedValue.Instance, moduleName, _librariesInProgress.Peek().Library.Package);
}
catch (InvalidOperationException e)
{
// символ уже определен
throw new RuntimeException($"Невозможно загрузить модуль {moduleName}. Такой символ уже определен.", e);
}
}
[ContextMethod("ЗагрузитьБиблиотеку", "LoadLibrary")]
public void LoadLibrary(string dllPath)
{
var context = new ComponentLoadingContext(dllPath);
var assembly = context.LoadFromAssemblyPath(dllPath);
_engine.AttachExternalAssembly(assembly, _env);
}
[ContextMethod("ДобавитьМакет", "AddTemplate")]
public void AddTemplate(string file, string name, TemplateKind kind = TemplateKind.File)
{
var manager = _engine.GlobalsManager.GetInstance<TemplateStorage>();
manager.RegisterTemplate(file, name, kind);
}
public PackageInfo ProcessLibrary(string libraryPath, IBslProcess process)
{
var package = new PackageInfo(libraryPath, Path.GetFileName(libraryPath));
var library = new ExternalLibraryInfo(package);
_librariesInProgress.Push(new LibraryLoadingContext(library));
try
{
bool success;
if(!_customized)
{
TraceLoadLibrary(
Locale.NStr($"ru = 'Использую НЕ кастомизированный загрузчик пакетов по умолчанию для библиотеки {libraryPath}';"+
$"en = 'Use NOT customized package loader for library {libraryPath}'")
);
success = DefaultProcessing(libraryPath, process);
}
else
{
TraceLoadLibrary(
Locale.NStr($"ru = 'Использую КАСТОМИЗИРОВАННЫЙ загрузчик пакетов для библиотеки {libraryPath}';"+
$"en = 'Use CUSTOMIZED package loader for library {libraryPath}'")
);
success = CustomizedProcessing(libraryPath, process);
}
if (!success)
return default;
CompileDelayedModules(library, process);
return package;
}
finally
{
_librariesInProgress.Pop();
}
}
private bool CustomizedProcessing(string libraryPath, IBslProcess process)
{
var libPathValue = ValueFactory.Create(libraryPath);
var defaultLoading = Variable.Create(ValueFactory.Create(true), "$internalDefaultLoading");
var cancelLoading = Variable.Create(ValueFactory.Create(false), "$internalCancelLoading");
int eventIdx = GetScriptMethod("ПриЗагрузкеБиблиотеки", "OnLibraryLoad");
if(eventIdx == -1)
{
return DefaultProcessing(libraryPath, process);
}
CallScriptMethod(eventIdx, new[] { libPathValue, defaultLoading, cancelLoading }, process);
if (cancelLoading.AsBoolean()) // Отказ = Ложь
return false;
if (defaultLoading.AsBoolean())
return DefaultProcessing(libraryPath, process);
return true;
}
private bool DefaultProcessing(string libraryPath, IBslProcess process)
{
var files = Directory.EnumerateFiles(libraryPath, "*.os")
.Select(x => new { Name = Path.GetFileNameWithoutExtension(x), Path = x })
.Where(x => Utils.IsValidIdentifier(x.Name))
.ToList();
bool hasFiles = false;
TraceLoadLibrary(
Locale.NStr($"ru = 'Обнаружено {files.Count} модулей в библиотеке {libraryPath}';"+
$"en = 'Found {files.Count} modules in library {libraryPath}'")
);
foreach (var file in files)
{
TraceLoadLibrary(
Locale.NStr($"ru = 'Загружаю модуль библиотеки из {file.Path}';"+
$"en = 'Load library module from {file.Path}'")
);
hasFiles = true;
AddModule(process, file.Path, file.Name);
}
return hasFiles;
}
private void CompileDelayedModules(ExternalLibraryInfo library, IBslProcess process)
{
foreach (var scriptFile in _librariesInProgress.Peek().delayLoadedScripts)
{
if (scriptFile.asClass)
{
library.AddClass(scriptFile.identifier, scriptFile.path);
}
else
{
library.AddModule(scriptFile.identifier, scriptFile.path);
}
}
foreach (var moduleFile in library.Modules)
{
moduleFile.Module = CompileFile(moduleFile.FilePath, library.Package.Id, process);
}
foreach (var classFile in library.Classes)
{
var module = CompileFile(classFile.FilePath, library.Package.Id, process);
_engine.AttachedScriptsFactory.RegisterTypeModule(classFile.Symbol, module);
classFile.Module = module;
}
_libManager.InitExternalLibrary(_engine, library, process);
}
private IExecutableModule CompileFile(string path, string ownerPackageId, IBslProcess process)
{
var compiler = _engine.GetCompilerService();
var source = _engine.Loader.FromFile(path, ownerPackageId);
var module = _engine.AttachedScriptsFactory.CompileModuleFromSource(compiler, source, null, process);
return module;
}
private static Lazy<bool> TraceEnabled =
new Lazy<bool>(() =>
System.Environment.GetEnvironmentVariable("OS_LIBRARY_LOADER_TRACE") == "1" ||
System.Environment.GetEnvironmentVariable("OS_LRE_TRACE") == "1"); // для обратной совместимости
public static void TraceLoadLibrary(string message)
{
if (TraceEnabled.Value) {
SystemLogger.Write("LRE: " + message);
}
}
}
}
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