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201 lines (167 loc) · 7.62 KB
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using System.Text;
using IronPython.Hosting;
using IronPython.Runtime;
using Microsoft.Scripting.Hosting;
using Microsoft.Scripting.Hosting.Providers;
using Microsoft.Scripting.Hosting.Shell;
using Microsoft.Scripting.Utils;
internal sealed class PythonConsoleHost : ConsoleHost {
protected override Type Provider {
get { return typeof(PythonContext); }
}
protected override CommandLine/*!*/ CreateCommandLine() {
return new PythonCommandLine();
}
protected override OptionsParser/*!*/ CreateOptionsParser() {
return new PythonOptionsParser();
}
protected override ScriptRuntimeSetup CreateRuntimeSetup() {
ScriptRuntimeSetup srs = base.CreateRuntimeSetup();
foreach (var langSetup in srs.LanguageSetups) {
if (langSetup.FileExtensions.Contains(".py")) {
langSetup.Options["SearchPaths"] = Array.Empty<string>();
}
}
return srs;
}
protected override LanguageSetup CreateLanguageSetup() {
return Python.CreateLanguageSetup(null);
}
private PythonConsoleOptions _pyoptions;
protected override IConsole CreateConsole(ScriptEngine engine, CommandLine commandLine, ConsoleOptions options) {
PythonConsoleOptions pyoptions = (PythonConsoleOptions)options;
return pyoptions.BasicConsole ? new BasicConsole(options.ColorfulConsole) : new SuperConsole(commandLine, options.ColorfulConsole);
}
protected override ConsoleOptions ParseOptions(string[] args, ScriptRuntimeSetup runtimeSetup, LanguageSetup languageSetup) {
var options = base.ParseOptions(args, runtimeSetup, languageSetup);
_pyoptions = (PythonConsoleOptions)options;
return options;
}
protected override void ParseHostOptions(string/*!*/[]/*!*/ args) {
// Python doesn't want any of the DLR base options.
foreach (string s in args) {
Options.IgnoredArgs.Add(s);
}
}
protected override void PrintVersion() {
if (_pyoptions?.PrintSysVersion == true) {
Console.WriteLine(GetVersionString(Engine.Setup.DisplayName));
} else {
Console.WriteLine(Engine.Setup.DisplayName);
}
// replicates PythonContext.GetVersionString
static string GetVersionString(string displayName) {
string configuration = ClrModule.IsDebug ? " DEBUG" : string.Empty;
string bitness = (IntPtr.Size * 8).ToString();
return $"{displayName}{configuration} ({typeof(ClrModule).Assembly.GetCustomAttribute<AssemblyFileVersionAttribute>()?.Version})\n" +
$"[{ClrModule.TargetFramework} on {ClrModule.FrameworkDescription} ({bitness}-bit)]";
}
}
public override void PrintLanguageHelp(StringBuilder output) {
new PythonOptionsParser().GetHelp(out string commandLine, out string[,] options, out string[,] environmentVariables, out string comments);
// only display language specific options if one or more optinos exists.
if (commandLine != null || options != null || environmentVariables != null || comments != null) {
var appendLine = false;
if (commandLine != null) {
appendLine = true;
output.AppendLine(commandLine);
}
if (options != null) {
if (appendLine) output.AppendLine();
appendLine = true;
// reformat the implementation-specific options
var newOptions = new List<KeyValuePair<string, string>>();
bool first = true;
for (int i = 0; i < options.GetLength(0); i++) {
var pair = new KeyValuePair<string, string>(options[i, 0], ": " + options[i, 1]);
if (pair.Key.StartsWith("-X", StringComparison.Ordinal)) {
if (first) {
first = false;
newOptions.Add(new KeyValuePair<string, string>("-X opt", ": set implementation-specific option. The following options are available:"));
newOptions.Add(new KeyValuePair<string, string>(string.Empty, string.Empty));
}
newOptions.Add(new KeyValuePair<string, string>(string.Empty, pair.Key + pair.Value));
} else {
newOptions.Add(pair);
}
}
options = new string[newOptions.Count, 2];
for (int i = 0; i < newOptions.Count; i++) {
options[i, 0] = newOptions[i].Key;
options[i, 1] = newOptions[i].Value;
}
output.AppendLine("Options:");
PrintTable(output, options);
}
if (environmentVariables != null) {
if (appendLine) output.AppendLine();
appendLine = true;
output.AppendLine("Environment variables:");
ArrayUtils.PrintTable(output, environmentVariables);
}
if (comments != null) {
if (appendLine) output.AppendLine();
output.AppendLine(comments);
}
}
static void PrintTable(StringBuilder output, string[,] table) {
int max_width = 0;
for (int i = 0; i < table.GetLength(0); i++) {
if (table[i, 0].Length > max_width) {
max_width = table[i, 0].Length;
}
}
for (int i = 0; i < table.GetLength(0); i++) {
output.Append(" ");
output.Append(table[i, 0]);
output.Append(' ', max_width - table[i, 0].Length + 1);
var lines = table[i, 1].Split('\n');
output.AppendLine(lines[0]);
for (var j = 1; j < lines.Length; j++) {
output.Append(' ', max_width + 4);
output.AppendLine(lines[j]);
}
}
}
}
protected override void ExecuteInternal() {
var pc = HostingHelpers.GetLanguageContext(Engine) as PythonContext;
pc.SetModuleState(typeof(ScriptEngine), Engine);
base.ExecuteInternal();
}
#if DEBUG
private static string[] MaybeAttachDebugger(string[] args) {
int attachDebugger = Array.IndexOf(args, "-X:Attach");
if (attachDebugger != -1) {
// Remove -X:Attach from the arg list, since after this point it's no use
string[] newArgs = new string[args.Length - 1];
Array.Copy(args, newArgs, attachDebugger);
Array.Copy(args, attachDebugger + 1, newArgs, attachDebugger, newArgs.Length - attachDebugger);
args = newArgs;
// Launch a debugger. This seems to be more reliable than
// Debugger.Break().
if (Debugger.IsAttached == false) Debugger.Launch();
}
return args;
}
#endif
[STAThread]
public static int Main(string[] args) {
// Work around issue w/ pydoc - piping to more doesn't work so
// instead indicate that we're a dumb terminal
if (Environment.GetEnvironmentVariable("TERM") == null) {
Environment.SetEnvironmentVariable("TERM", "dumb");
}
#if DEBUG
args = MaybeAttachDebugger(args);
#endif
return new PythonConsoleHost().Run(args);
}
}