From 69d89cd20b66564b1e74e4739ffd501cdbc394a5 Mon Sep 17 00:00:00 2001
From: Tamas Vajk <tamasvajk@github.com>
Date: Fri, 21 Jun 2024 10:11:45 +0200
Subject: [PATCH] Compute unique identifier (folder path) for each compilation

---
 .../Extractor/Extractor.cs                    | 16 ++++++++++++++--
 csharp/extractor/Semmle.Util/FileUtils.cs     | 19 +++++++++++++------
 .../all-platforms/binlog/Files.expected       |  3 ++-
 3 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/csharp/extractor/Semmle.Extraction.CSharp/Extractor/Extractor.cs b/csharp/extractor/Semmle.Extraction.CSharp/Extractor/Extractor.cs
index 94cb59e9ceffd..d4c9f07f7447e 100644
--- a/csharp/extractor/Semmle.Extraction.CSharp/Extractor/Extractor.cs
+++ b/csharp/extractor/Semmle.Extraction.CSharp/Extractor/Extractor.cs
@@ -155,8 +155,20 @@ static bool filter(CompilerCall compilerCall)
 
                     var compilerCall = compilationData.CompilerCall;
                     var diagnosticName = compilerCall.GetDiagnosticName();
-                    logger.LogInfo($"  Processing compilation {diagnosticName}");
+                    logger.LogInfo($"  Processing compilation {diagnosticName} at {compilerCall.ProjectDirectory}");
                     var compilerArgs = compilerCall.GetArguments();
+
+                    var compilationIdentifierPath = string.Empty;
+                    try
+                    {
+                        compilationIdentifierPath = FileUtils.ConvertPathToSafeRelativePath(
+                            Path.GetRelativePath(Directory.GetCurrentDirectory(), compilerCall.ProjectDirectory));
+                    }
+                    catch (ArgumentException exc)
+                    {
+                        logger.LogWarning($"  Failed to get relative path for {compilerCall.ProjectDirectory} from current working directory {Directory.GetCurrentDirectory()}: {exc.Message}");
+                    }
+
                     var args = reader.ReadCommandLineArguments(compilerCall);
 
                     // Generated syntax trees are always added to the end of the list of syntax trees.
@@ -174,7 +186,7 @@ static bool filter(CompilerCall compilerCall)
                             TracingAnalyser.GetOutputName(compilation, args),
                             compilation,
                             generatedSyntaxTrees,
-                            diagnosticName,
+                            Path.Combine(compilationIdentifierPath, diagnosticName),
                             options),
                         () => { });
 
diff --git a/csharp/extractor/Semmle.Util/FileUtils.cs b/csharp/extractor/Semmle.Util/FileUtils.cs
index 4d9052bcc4eaa..92087645fd1c4 100644
--- a/csharp/extractor/Semmle.Util/FileUtils.cs
+++ b/csharp/extractor/Semmle.Util/FileUtils.cs
@@ -113,17 +113,24 @@ private static async Task DownloadFileAsync(string address, string filename)
         public static void DownloadFile(string address, string fileName) =>
            DownloadFileAsync(address, fileName).GetAwaiter().GetResult();
 
+        public static string ConvertPathToSafeRelativePath(string path)
+        {
+            // Remove all leading path separators / or \
+            // For example, UNC paths have two leading \\
+            path = path.TrimStart(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
+
+            if (path.Length > 1 && path[1] == ':')
+                path = path[0] + "_" + path.Substring(2);
+
+            return path;
+        }
+
         public static string NestPaths(ILogger logger, string? outerpath, string innerpath)
         {
             var nested = innerpath;
             if (!string.IsNullOrEmpty(outerpath))
             {
-                // Remove all leading path separators / or \
-                // For example, UNC paths have two leading \\
-                innerpath = innerpath.TrimStart(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
-
-                if (innerpath.Length > 1 && innerpath[1] == ':')
-                    innerpath = innerpath[0] + "_" + innerpath.Substring(2);
+                innerpath = ConvertPathToSafeRelativePath(innerpath);
 
                 nested = Path.Combine(outerpath, innerpath);
             }
diff --git a/csharp/ql/integration-tests/all-platforms/binlog/Files.expected b/csharp/ql/integration-tests/all-platforms/binlog/Files.expected
index 8b3aae7617b73..bf3694ff9caa5 100644
--- a/csharp/ql/integration-tests/all-platforms/binlog/Files.expected
+++ b/csharp/ql/integration-tests/all-platforms/binlog/Files.expected
@@ -6,4 +6,5 @@
 | b/obj/Debug/net8.0/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs:0:0:0:0 | b/obj/Debug/net8.0/.NETCoreApp,Version=v8.0.AssemblyAttributes.cs |
 | b/obj/Debug/net8.0/test.AssemblyInfo.cs:0:0:0:0 | b/obj/Debug/net8.0/test.AssemblyInfo.cs |
 | b/obj/Debug/net8.0/test.GlobalUsings.g.cs:0:0:0:0 | b/obj/Debug/net8.0/test.GlobalUsings.g.cs |
-| generated/test.csproj (net8.0)/System.Text.RegularExpressions.Generator/System.Text.RegularExpressions.Generator.RegexGenerator/RegexGenerator.g.cs:0:0:0:0 | generated/test.csproj (net8.0)/System.Text.RegularExpressions.Generator/System.Text.RegularExpressions.Generator.RegexGenerator/RegexGenerator.g.cs |
+| generated/a/test.csproj (net8.0)/System.Text.RegularExpressions.Generator/System.Text.RegularExpressions.Generator.RegexGenerator/RegexGenerator.g.cs:0:0:0:0 | generated/a/test.csproj (net8.0)/System.Text.RegularExpressions.Generator/System.Text.RegularExpressions.Generator.RegexGenerator/RegexGenerator.g.cs |
+| generated/b/test.csproj (net8.0)/System.Text.RegularExpressions.Generator/System.Text.RegularExpressions.Generator.RegexGenerator/RegexGenerator.g.cs:0:0:0:0 | generated/b/test.csproj (net8.0)/System.Text.RegularExpressions.Generator/System.Text.RegularExpressions.Generator.RegexGenerator/RegexGenerator.g.cs |