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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* [email protected]. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
#if FEATURE_FULL_CONSOLE
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Threading;
using IronPython.Compiler;
using IronPython.Modules;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using Microsoft.Scripting;
using Microsoft.Scripting.Hosting.Shell;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
namespace IronPython.Hosting {
/// <summary>
/// A simple Python command-line should mimic the standard python.exe
/// </summary>
public sealed class PythonCommandLine : CommandLine {
private PythonContext PythonContext {
get { return (PythonContext)Language; }
}
private new PythonConsoleOptions Options { get { return (PythonConsoleOptions)base.Options; } }
public PythonCommandLine() {
}
protected override string/*!*/ Logo {
get {
return GetLogoDisplay();
}
}
/// <summary>
/// Returns the display look for IronPython.
///
/// The returned string uses This \n instead of Environment.NewLine for it's line seperator
/// because it is intended to be outputted through the Python I/O system.
/// </summary>
public static string GetLogoDisplay() {
return PythonContext.GetVersionString() +
"\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\n";
}
private int GetEffectiveExitCode(SystemExitException/*!*/ e) {
object nonIntegerCode;
int exitCode = e.GetExitCode(out nonIntegerCode);
if (nonIntegerCode != null) {
Console.WriteLine(nonIntegerCode.ToString(), Style.Error);
}
return exitCode;
}
protected override void Shutdown() {
try {
Language.Shutdown();
} catch (Exception e) {
Console.WriteLine("", Style.Error);
Console.WriteLine("Error in sys.exitfunc:", Style.Error);
Console.Write(Language.FormatException(e), Style.Error);
}
}
protected override int Run() {
if (Options.ModuleToRun != null) {
// PEP 338 support - http://www.python.org/dev/peps/pep-0338
// This requires the presence of the Python standard library or
// an equivalent runpy.py which defines a run_module method.
// import the runpy module
object runpy, runMod;
try {
runpy = Importer.Import(
PythonContext.SharedContext,
"runpy",
PythonTuple.EMPTY,
0
);
} catch (Exception) {
Console.WriteLine("Could not import runpy module", Style.Error);
return -1;
}
// get the run_module method
try {
runMod = PythonOps.GetBoundAttr(PythonContext.SharedContext, runpy, "run_module");
} catch (Exception) {
Console.WriteLine("Could not access runpy.run_module", Style.Error);
return -1;
}
// call it with the name of the module to run
try {
PythonOps.CallWithKeywordArgs(
PythonContext.SharedContext,
runMod,
new object[] { Options.ModuleToRun, "__main__", ScriptingRuntimeHelpers.True },
new string[] { "run_name", "alter_sys" }
);
} catch (SystemExitException e) {
object dummy;
return e.GetExitCode(out dummy);
}
return 0;
}
int result = base.Run();
// Check if IRONPYTHONINSPECT was set during execution
string inspectLine = Environment.GetEnvironmentVariable("IRONPYTHONINSPECT");
if (inspectLine != null && !Options.Introspection)
result = RunInteractiveLoop();
return result;
}
#region Initialization
protected override void Initialize() {
Debug.Assert(Language != null);
base.Initialize();
Console.Output = new OutputWriter(PythonContext, false);
Console.ErrorOutput = new OutputWriter(PythonContext, true);
// TODO: must precede path initialization! (??? - test test_importpkg.py)
int pathIndex = PythonContext.PythonOptions.SearchPaths.Count;
Language.DomainManager.LoadAssembly(typeof(string).Assembly);
Language.DomainManager.LoadAssembly(typeof(System.Diagnostics.Debug).Assembly);
InitializePath(ref pathIndex);
InitializeModules();
InitializeExtensionDLLs();
ImportSite();
// Equivalent to -i command line option
// Check if IRONPYTHONINSPECT was set before execution
string inspectLine = Environment.GetEnvironmentVariable("IRONPYTHONINSPECT");
if (inspectLine != null)
Options.Introspection = true;
// If running in console mode (including with -c), the current working directory should be
// the first entry in sys.path. If running a script file, however, the CWD should not be added;
// instead, the script's containg folder should be added.
string fullPath = "."; // this is a valid path resolving to current working dir. Pinky-swear.
if (Options.Command == null && Options.FileName != null) {
if (Options.FileName == "-") {
Options.FileName = "<stdin>";
} else {
#if !SILVERLIGHT
if (Directory.Exists(Options.FileName)) {
Options.FileName = Path.Combine(Options.FileName, "__main__.py");
}
if (!File.Exists(Options.FileName)) {
Console.WriteLine(
String.Format(
System.Globalization.CultureInfo.InvariantCulture,
"File {0} does not exist.",
Options.FileName),
Style.Error);
Environment.Exit(1);
}
#endif
fullPath = Path.GetDirectoryName(
Language.DomainManager.Platform.GetFullPath(Options.FileName)
);
}
}
PythonContext.InsertIntoPath(0, fullPath);
PythonContext.MainThread = Thread.CurrentThread;
}
protected override Scope/*!*/ CreateScope() {
var modCtx = new ModuleContext(new PythonDictionary(), PythonContext);
modCtx.Features = ModuleOptions.None;
modCtx.InitializeBuiltins(true);
PythonContext.PublishModule("__main__", modCtx.Module);
modCtx.Globals["__doc__"] = null;
modCtx.Globals["__name__"] = "__main__";
return modCtx.GlobalScope;
}
private void InitializePath(ref int pathIndex) {
#if !SILVERLIGHT // paths, environment vars
if (!Options.IgnoreEnvironmentVariables) {
string path = Environment.GetEnvironmentVariable("IRONPYTHONPATH");
if (path != null && path.Length > 0) {
string[] paths = path.Split(Path.PathSeparator);
foreach (string p in paths) {
PythonContext.InsertIntoPath(pathIndex++, p);
}
}
}
#endif
}
private void InitializeModules() {
string executable = "";
string prefix = null;
#if !SILVERLIGHT // paths
Assembly entryAssembly = Assembly.GetEntryAssembly();
//Can be null if called from unmanaged code (VS integration scenario)
if (entryAssembly != null) {
executable = entryAssembly.Location;
prefix = Path.GetDirectoryName(executable);
}
// Make sure there an IronPython Lib directory, and if not keep looking up
while (prefix != null && !File.Exists(Path.Combine(prefix, "Lib/os.py"))) {
prefix = Path.GetDirectoryName(prefix);
}
#endif
PythonContext.SetHostVariables(prefix ?? "", executable, null);
}
/// <summary>
/// Loads any extension DLLs present in sys.prefix\DLLs directory and adds references to them.
///
/// This provides an easy drop-in location for .NET assemblies which should be automatically referenced
/// (exposed via import), COM libraries, and pre-compiled Python code.
/// </summary>
private void InitializeExtensionDLLs() {
string dir = Path.Combine(PythonContext.InitialPrefix, "DLLs");
if (Directory.Exists(dir)) {
foreach (string file in Directory.GetFiles(dir)) {
if (file.ToLower().EndsWith(".dll")) {
try {
ClrModule.AddReference(PythonContext.SharedContext, new FileInfo(file).Name);
} catch {
}
}
}
}
}
private void ImportSite() {
if (Options.SkipImportSite)
return;
try {
Importer.ImportModule(PythonContext.SharedContext, null, "site", false, -1);
} catch (Exception e) {
Console.Write(Language.FormatException(e), Style.Error);
}
}
#endregion
#region Interactive
protected override int RunInteractive() {
PrintLogo();
if (Scope == null) {
Scope = CreateScope();
}
int result = 1;
try {
RunStartup();
result = 0;
} catch (SystemExitException pythonSystemExit) {
return GetEffectiveExitCode(pythonSystemExit);
} catch (Exception) {
}
var sys = Engine.GetSysModule();
sys.SetVariable("ps1", ">>> ");
sys.SetVariable("ps2", "... ");
result = RunInteractiveLoop();
return (int)result;
}
protected override string Prompt {
get {
object value;
if (Engine.GetSysModule().TryGetVariable("ps1", out value)) {
var context = ((PythonScopeExtension)Scope.GetExtension(Language.ContextId)).ModuleContext.GlobalContext;
return PythonOps.ToString(context, value);
}
return ">>> ";
}
}
public override string PromptContinuation {
get {
object value;
if (Engine.GetSysModule().TryGetVariable("ps2", out value)) {
var context = ((PythonScopeExtension)Scope.GetExtension(Language.ContextId)).ModuleContext.GlobalContext;
return PythonOps.ToString(context, value);
}
return "... ";
}
}
private void RunStartup() {
if (Options.IgnoreEnvironmentVariables)
return;
#if !SILVERLIGHT // Environment.GetEnvironmentVariable
string startup = Environment.GetEnvironmentVariable("IRONPYTHONSTARTUP");
if (startup != null && startup.Length > 0) {
if (Options.HandleExceptions) {
try {
ExecuteCommand(Engine.CreateScriptSourceFromFile(startup));
} catch (Exception e) {
if (e is SystemExitException) throw;
Console.Write(Language.FormatException(e), Style.Error);
}
} else {
ExecuteCommand(Engine.CreateScriptSourceFromFile(startup));
}
}
#endif
}
protected override int? TryInteractiveAction() {
try {
try {
return TryInteractiveActionWorker();
} finally {
// sys.exc_info() is normally cleared after functions exit. But interactive console enters statements
// directly instead of using functions. So clear explicitly.
PythonOps.ClearCurrentException();
}
} catch (SystemExitException se) {
return GetEffectiveExitCode(se);
}
}
/// <summary>
/// Attempts to run a single interaction and handle any language-specific
/// exceptions. Base classes can override this and call the base implementation
/// surrounded with their own exception handling.
///
/// Returns null if successful and execution should continue, or an exit code.
/// </summary>
private int? TryInteractiveActionWorker() {
int? result = null;
try {
result = RunOneInteraction();
#if !FEATURE_EXCEPTION_STATE
} catch (ThreadAbortException) {
#else
} catch (ThreadAbortException tae) {
KeyboardInterruptException pki = tae.ExceptionState as KeyboardInterruptException;
if (pki != null) {
Console.WriteLine(Language.FormatException(tae), Style.Error);
Thread.ResetAbort();
}
#endif
}
return result;
}
/// <summary>
/// Parses a single interactive command and executes it.
///
/// Returns null if successful and execution should continue, or the appropiate exit code.
/// </summary>
private int? RunOneInteraction() {
bool continueInteraction;
string s = ReadStatement(out continueInteraction);
if (continueInteraction == false) {
PythonContext.DispatchCommand(null); // Notify dispatcher that we're done
return 0;
}
if (String.IsNullOrEmpty(s)) {
// Is it an empty line?
Console.Write(String.Empty, Style.Out);
return null;
}
SourceUnit su = Language.CreateSnippet(s, "<stdin>", SourceCodeKind.InteractiveCode);
PythonCompilerOptions pco = (PythonCompilerOptions)Language.GetCompilerOptions(Scope);
pco.Module |= ModuleOptions.ExecOrEvalCode;
Action action = delegate() {
try {
su.Compile(pco, ErrorSink).Run(Scope);
} catch (Exception e) {
if (e is SystemExitException) {
throw;
}
// Need to handle exceptions in the delegate so that they're not wrapped
// in a TargetInvocationException
UnhandledException(e);
}
};
try {
PythonContext.DispatchCommand(action);
} catch (SystemExitException sx) {
object dummy;
return sx.GetExitCode(out dummy);
}
return null;
}
protected override ErrorSink/*!*/ ErrorSink {
get { return ThrowingErrorSink.Default; }
}
protected override int GetNextAutoIndentSize(string text) {
return Parser.GetNextAutoIndentSize(text, Options.AutoIndentSize);
}
#endregion
#region Command
protected override int RunCommand(string command) {
if (Options.HandleExceptions) {
try {
return RunCommandWorker(command);
} catch (Exception e) {
Console.Write(Language.FormatException(e), Style.Error);
return 1;
}
}
return RunCommandWorker(command);
}
private int RunCommandWorker(string command) {
ScriptCode compiledCode;
ModuleOptions modOpt = ModuleOptions.Optimized | ModuleOptions.ModuleBuiltins;
if (Options.SkipFirstSourceLine) {
modOpt |= ModuleOptions.SkipFirstLine;
}
PythonModule module = PythonContext.CompileModule(
"", // there is no file, it will be set to <module>
"__main__",
PythonContext.CreateSnippet(command, SourceCodeKind.File),
modOpt,
out compiledCode);
PythonContext.PublishModule("__main__", module);
Scope = module.Scope;
try {
compiledCode.Run(Scope);
} catch (SystemExitException pythonSystemExit) {
// disable introspection when exited:
Options.Introspection = false;
return GetEffectiveExitCode(pythonSystemExit);
}
return 0;
}
#endregion
#region File
protected override int RunFile(string/*!*/ fileName) {
int result = 1;
if (Options.HandleExceptions) {
try {
result = RunFileWorker(fileName);
} catch (Exception e) {
Console.Write(Language.FormatException(e), Style.Error);
}
} else {
result = RunFileWorker(fileName);
}
return result;
}
private int RunFileWorker(string/*!*/ fileName) {
try {
// There is no PEP for this case, only http://bugs.python.org/issue1739468
object importer;
if (Importer.TryImportMainFromZip(DefaultContext.Default, fileName, out importer)) {
return 0;
}
if (importer != null && importer.GetType() != typeof(PythonImport.NullImporter)) {
Console.WriteLine(String.Format("can't find '__main__' module in '{0}'", fileName), Style.Error);
return 0;
}
} catch (SystemExitException pythonSystemExit) {
// disable introspection when exited:
Options.Introspection = false;
return GetEffectiveExitCode(pythonSystemExit);
}
// classic file
ScriptCode compiledCode;
ModuleOptions modOpt = ModuleOptions.Optimized | ModuleOptions.ModuleBuiltins;
if(Options.SkipFirstSourceLine) {
modOpt |= ModuleOptions.SkipFirstLine;
}
PythonModule module = PythonContext.CompileModule(
fileName,
"__main__",
PythonContext.CreateFileUnit(String.IsNullOrEmpty(fileName) ? null : fileName, PythonContext.DefaultEncoding),
modOpt,
out compiledCode);
PythonContext.PublishModule("__main__", module);
Scope = module.Scope;
try {
compiledCode.Run(Scope);
} catch (SystemExitException pythonSystemExit) {
// disable introspection when exited:
Options.Introspection = false;
return GetEffectiveExitCode(pythonSystemExit);
}
return 0;
}
#endregion
public override IList<string> GetGlobals(string name) {
IList<string> res = base.GetGlobals(name);
foreach (object builtinName in PythonContext.BuiltinModuleInstance.__dict__.Keys) {
string strName = builtinName as string;
if (strName != null && strName.StartsWith(name)) {
res.Add(strName);
}
}
return res;
}
protected override void UnhandledException(Exception e) {
PythonOps.PrintException(PythonContext.SharedContext, e, Console);
}
private new PythonContext Language {
get {
return (PythonContext)base.Language;
}
}
}
}
#endif