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C#: Download nuget.exe to the source directory in case it is not installed.

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This commit is contained in:
Michael Nebel
2023-08-28 13:28:36 +02:00
parent b6c2ea520b
commit 6e4865ddd9
3 changed files with 58 additions and 14 deletions
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65
csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/NugetPackages.cs
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@@ -1,5 +1,4 @@
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
@@ -43,25 +42,68 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
PackageDirectory = packageDirectory;
this.progressMonitor = progressMonitor;
// Expect nuget.exe to be in a `nuget` directory under the directory containing this exe.
var currentAssembly = System.Reflection.Assembly.GetExecutingAssembly().Location;
var directory = Path.GetDirectoryName(currentAssembly)
?? throw new FileNotFoundException($"Directory path '{currentAssembly}' of current assembly is null");
nugetExe = Path.Combine(directory, "nuget", "nuget.exe");
if (!File.Exists(nugetExe))
throw new FileNotFoundException(string.Format("NuGet could not be found at {0}", nugetExe));
nugetExe = ResolveNugetExe(sourceDir);
PackageFiles = new DirectoryInfo(SourceDirectory)
.EnumerateFiles("packages.config", SearchOption.AllDirectories)
.ToArray();
}
/// <summary>
/// Tries to find the location of `nuget.exe` in the nuget directory under the directory
/// containing the executing assembly. If it can't be found, it is downloaded to the
/// `.nuget` directory under the source directory.
/// </summary>
/// <param name="sourceDir">The source directory.</param>
private string ResolveNugetExe(string sourceDir)
{
var currentAssembly = System.Reflection.Assembly.GetExecutingAssembly().Location;
var directory = Path.GetDirectoryName(currentAssembly)
?? throw new FileNotFoundException($"Directory path '{currentAssembly}' of current assembly is null");
var nuget = Path.Combine(directory, "nuget", "nuget.exe");
if (File.Exists(nuget))
{
progressMonitor.LogInfo($"Found nuget.exe at {nuget}");
return nuget;
}
else
{
progressMonitor.LogInfo($"Nuget.exe could not be found at {nuget}");
return DownloadNugetExe(sourceDir);
}
}
private string DownloadNugetExe(string sourceDir)
{
var directory = Path.Combine(sourceDir, ".nuget");
var nuget = Path.Combine(directory, "nuget.exe");
// Nuget.exe already exists in the .nuget directory.
if (File.Exists(nuget))
{
progressMonitor.LogInfo($"Found nuget.exe at {nuget}");
return nuget;
}
Directory.CreateDirectory(directory);
progressMonitor.LogInfo("Attempting to download nuget.exe");
try
{
FileUtils.DownloadFile(FileUtils.nugetExeUrl, nuget);
progressMonitor.LogInfo($"Downloaded nuget.exe to {nuget}");
return nuget;
}
catch
{
// Download failed.
throw new FileNotFoundException("Download of nuget.exe failed.");
}
}
/// <summary>
/// Restore all files in a specified package.
/// </summary>
/// <param name="package">The package file.</param>
/// <param name="pm">Where to log progress/errors.</param>
private void RestoreNugetPackage(string package)
{
progressMonitor.NugetInstall(package);
@@ -120,7 +162,6 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
/// <summary>
/// Download the packages to the temp folder.
/// </summary>
/// <param name="pm">The progress monitor used for reporting errors etc.</param>
public void InstallPackages()
{
foreach (var package in PackageFiles)