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C#: Generate source file with implicit usings in Standalone

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This commit is contained in:
Tamas Vajk
2023-09-15 10:52:30 +02:00
parent 730480360e
commit d725bd9169
4 changed files with 158 additions and 91 deletions
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56
csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/FileContent.cs
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@@ -19,6 +19,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
private readonly IUnsafeFileReader unsafeFileReader;
private readonly IEnumerable<string> files;
private readonly HashSet<string> allPackages = new HashSet<string>();
private readonly HashSet<string> implicitUsingNamespaces = new HashSet<string>();
private readonly Initializer initialize;
public HashSet<string> AllPackages
@@ -48,6 +49,26 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
}
}
private bool useImplicitUsings = false;
public bool UseImplicitUsings
{
get
{
initialize.Run();
return useImplicitUsings;
}
}
public HashSet<string> CustomImplicitUsings
{
get
{
initialize.Run();
return implicitUsingNamespaces;
}
}
internal FileContent(ProgressMonitor progressMonitor,
IEnumerable<string> files,
IUnsafeFileReader unsafeFileReader)
@@ -62,7 +83,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
public FileContent(ProgressMonitor progressMonitor, IEnumerable<string> files) : this(progressMonitor, files, new UnsafeFileReader())
{ }
private static string GetGroup(ReadOnlySpan<char> input, ValueMatch valueMatch, string groupPrefix)
private static string GetGroup(ReadOnlySpan<char> input, ValueMatch valueMatch, string groupPrefix, bool toLower)
{
var match = input.Slice(valueMatch.Index, valueMatch.Length);
var includeIndex = match.IndexOf(groupPrefix, StringComparison.InvariantCultureIgnoreCase);
@@ -76,7 +97,14 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
var quoteIndex1 = match.IndexOf("\"");
var quoteIndex2 = match.Slice(quoteIndex1 + 1).IndexOf("\"");
return match.Slice(quoteIndex1 + 1, quoteIndex2).ToString().ToLowerInvariant();
var result = match.Slice(quoteIndex1 + 1, quoteIndex2).ToString();
if (toLower)
{
result = result.ToLowerInvariant();
}
return result;
}
private static bool IsGroupMatch(ReadOnlySpan<char> line, Regex regex, string groupPrefix, string value)
@@ -84,7 +112,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
foreach (var valueMatch in regex.EnumerateMatches(line))
{
// We can't get the group from the ValueMatch, so doing it manually:
if (GetGroup(line, valueMatch, groupPrefix) == value.ToLowerInvariant())
if (GetGroup(line, valueMatch, groupPrefix, toLower: true) == value.ToLowerInvariant())
{
return true;
}
@@ -105,7 +133,7 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
foreach (var valueMatch in PackageReference().EnumerateMatches(line))
{
// We can't get the group from the ValueMatch, so doing it manually:
var packageName = GetGroup(line, valueMatch, "Include");
var packageName = GetGroup(line, valueMatch, "Include", toLower: true);
if (!string.IsNullOrEmpty(packageName))
{
allPackages.Add(packageName);
@@ -119,6 +147,23 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
IsGroupMatch(line, ProjectSdk(), "Sdk", "Microsoft.NET.Sdk.Web") ||
IsGroupMatch(line, FrameworkReference(), "Include", "Microsoft.AspNetCore.App");
}
// Determine if implicit usings are used.
if (!useImplicitUsings)
{
useImplicitUsings = line.Contains("<ImplicitUsings>enable</ImplicitUsings>".AsSpan(), StringComparison.Ordinal) ||
line.Contains("<ImplicitUsings>true</ImplicitUsings>".AsSpan(), StringComparison.Ordinal);
}
// Find all custom implicit usings.
foreach (var valueMatch in CustomImplicitUsingDeclarations().EnumerateMatches(line))
{
var ns = GetGroup(line, valueMatch, "Include", toLower: false);
if (!string.IsNullOrEmpty(ns))
{
implicitUsingNamespaces.Add(ns);
}
}
}
}
catch (Exception ex)
@@ -136,6 +181,9 @@ namespace Semmle.Extraction.CSharp.DependencyFetching
[GeneratedRegex("<(.*\\s)?Project.*\\sSdk=\"(.*?)\".*/?>", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline)]
private static partial Regex ProjectSdk();
[GeneratedRegex("<Using.*\\sInclude=\"(.*?)\".*/?>", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.Singleline)]
private static partial Regex CustomImplicitUsingDeclarations();
}
internal interface IUnsafeFileReader