/
Program.cs
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/
Program.cs
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using System;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Runtime.CompilerServices;
[assembly: InternalsVisibleTo("Paket.Bootstrapper.Tests")]
namespace Paket.Bootstrapper
{
class Program
{
const string PreferNugetCommandArg = "--prefer-nuget";
const string PreferNugetAppSettingsKey = "PreferNuget";
const string PrereleaseCommandArg = "prerelease";
const string PaketVersionEnv = "PAKET.VERSION";
const string PaketVersionAppSettingsKey = "PaketVersion";
const string SelfUpdateCommandArg = "--self";
const string SilentCommandArg = "-s";
const string NugetSourceArgPrefix = "--nuget-source=";
static void Main(string[] args)
{
Console.CancelKeyPress += CancelKeyPressed;
var commandArgs = args;
var preferNuget = false;
if (commandArgs.Contains(PreferNugetCommandArg))
{
preferNuget = true;
commandArgs = args.Where(x => x != PreferNugetCommandArg).ToArray();
}
else if (ConfigurationManager.AppSettings[PreferNugetAppSettingsKey] == "true")
{
preferNuget = true;
}
var silent = false;
if (commandArgs.Contains(SilentCommandArg))
{
silent = true;
commandArgs = args.Where(x => x != SilentCommandArg).ToArray();
}
var dlArgs = EvaluateCommandArgs(commandArgs, silent);
var effectiveStrategy = GetEffectiveDownloadStrategy(dlArgs, preferNuget);
StartPaketBootstrapping(effectiveStrategy, dlArgs, silent);
}
private static void CancelKeyPressed(object sender, ConsoleCancelEventArgs e)
{
Console.WriteLine("Bootstrapper cancelled");
var folder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
var target = Path.Combine(folder, "paket.exe");
var exitCode = 1;
if (File.Exists(target))
{
var localVersion = BootstrapperHelper.GetLocalFileVersion(target);
Console.WriteLine("Detected existing paket.exe ({0}). Cancelling normally.", localVersion);
exitCode = 0;
}
Environment.Exit(exitCode);
}
private static void StartPaketBootstrapping(IDownloadStrategy downloadStrategy, DownloadArguments dlArgs, bool silent)
{
Action<Exception> handleException = exception =>
{
if (!File.Exists(dlArgs.Target))
Environment.ExitCode = 1;
BootstrapperHelper.WriteConsoleError(String.Format("{0} ({1})", exception.Message, downloadStrategy.Name));
};
try
{
var localVersion = BootstrapperHelper.GetLocalFileVersion(dlArgs.Target);
var latestVersion = dlArgs.LatestVersion;
if (latestVersion == String.Empty)
{
latestVersion = downloadStrategy.GetLatestVersion(dlArgs.IgnorePrerelease);
}
if (dlArgs.DoSelfUpdate)
{
if (!silent)
Console.WriteLine("Trying self update");
downloadStrategy.SelfUpdate(latestVersion, silent);
}
else
{
var currentSemVer = String.IsNullOrEmpty(localVersion) ? new SemVer() : SemVer.Create(localVersion);
var latestSemVer = SemVer.Create(latestVersion);
if (currentSemVer.CompareTo(latestSemVer) != 0)
{
downloadStrategy.DownloadVersion(latestVersion, dlArgs.Target, silent);
if (!silent)
Console.WriteLine("Done.");
}
else
{
if (!silent)
Console.WriteLine("Paket.exe {0} is up to date.", localVersion);
}
}
}
catch (WebException exn)
{
var shouldHandleException = true;
if (!File.Exists(dlArgs.Target))
{
if (downloadStrategy.FallbackStrategy != null)
{
var fallbackStrategy = downloadStrategy.FallbackStrategy;
if (!silent)
Console.WriteLine("'{0}' download failed. If using Mono, you may need to import trusted certificates using the 'mozroots' tool as none are contained by default. Trying fallback download from '{1}'.",
downloadStrategy.Name, fallbackStrategy.Name);
StartPaketBootstrapping(fallbackStrategy, dlArgs, silent);
shouldHandleException = !File.Exists(dlArgs.Target);
}
}
if (shouldHandleException)
handleException(exn);
}
catch (Exception exn)
{
handleException(exn);
}
}
private static IDownloadStrategy GetEffectiveDownloadStrategy(DownloadArguments dlArgs, bool preferNuget)
{
var gitHubDownloadStrategy = new GitHubDownloadStrategy(BootstrapperHelper.PrepareWebClient, BootstrapperHelper.PrepareWebRequest, BootstrapperHelper.GetDefaultWebProxyFor);
var nugetDownloadStrategy = new NugetDownloadStrategy(BootstrapperHelper.PrepareWebClient, BootstrapperHelper.GetDefaultWebProxyFor, dlArgs.Folder, dlArgs.NugetSource);
IDownloadStrategy effectiveStrategy;
if (preferNuget)
{
effectiveStrategy = nugetDownloadStrategy;
nugetDownloadStrategy.FallbackStrategy = gitHubDownloadStrategy;
}
else
{
effectiveStrategy = gitHubDownloadStrategy;
gitHubDownloadStrategy.FallbackStrategy = nugetDownloadStrategy;
}
return effectiveStrategy;
}
private static DownloadArguments EvaluateCommandArgs(string[] args, bool silent)
{
var folder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
var target = Path.Combine(folder, "paket.exe");
string nugetSource = null;
var latestVersion = ConfigurationManager.AppSettings[PaketVersionAppSettingsKey] ?? Environment.GetEnvironmentVariable(PaketVersionEnv) ?? String.Empty;
var ignorePrerelease = true;
bool doSelfUpdate = false;
var commandArgs = args;
if (commandArgs.Contains(SelfUpdateCommandArg))
{
commandArgs = commandArgs.Where(x => x != SelfUpdateCommandArg).ToArray();
doSelfUpdate = true;
}
var nugetSourceArg = commandArgs.SingleOrDefault(x => x.StartsWith(NugetSourceArgPrefix));
if (nugetSourceArg != null)
{
commandArgs = commandArgs.Where(x => !x.StartsWith(NugetSourceArgPrefix)).ToArray();
nugetSource = nugetSourceArg.Substring(NugetSourceArgPrefix.Length);
}
if (commandArgs.Length >= 1)
{
if (commandArgs[0] == PrereleaseCommandArg)
{
ignorePrerelease = false;
latestVersion = String.Empty;
if (!silent)
Console.WriteLine("Prerelease requested. Looking for latest prerelease.");
}
else
{
latestVersion = commandArgs[0];
if (!silent)
{
if (!String.IsNullOrWhiteSpace(latestVersion))
Console.WriteLine("Version {0} requested.", latestVersion);
else
Console.WriteLine("No version specified. Downloading latest stable.");
}
}
}
else
{
if (!silent)
{
if (!String.IsNullOrWhiteSpace(latestVersion))
Console.WriteLine("Version {0} requested.", latestVersion);
else
Console.WriteLine("No version specified. Downloading latest stable.");
}
}
return new DownloadArguments(latestVersion, ignorePrerelease, folder, target, doSelfUpdate, nugetSource);
}
}
}