Fix parsing of compiler path from binlog

src/Basic.CompilerLog.UnitTests/BinaryLogReaderTests.cs

@@ -77,6 +77,19 @@ public void CreateFilePathLogReaderState()
         state.Dispose();
     }
 
+    /// <summary>
+    /// Make sure the underlying stream is managed properly so we can read the compiler calls twice.
+    /// </summary>
+    [Fact]
+    public void ReadAllCompilerCallsTwice()
+    {   
+        using var state = new LogReaderState();
+        using var reader = BinaryLogReader.Create(Fixture.Console.Value.BinaryLogPath!, BasicAnalyzerKind.OnDisk, state);
+        Assert.Single(reader.ReadAllCompilerCalls());
+        Assert.Single(reader.ReadAllCompilerCalls());
+        state.Dispose();
+    }
+
     [Theory]
     [InlineData(BasicAnalyzerKind.InMemory, true)]
     [InlineData(BasicAnalyzerKind.OnDisk, true)]

src/Basic.CompilerLog.UnitTests/BinaryLogUtilTests.cs

@@ -27,7 +27,33 @@ public sealed class BinaryLogUtilTests
     [InlineData("csc.exe a.cs b.cs", "csc.exe", "a.cs b.cs")]
     public void ParseCompilerAndArgumentsCsc(string inputArgs, string? expectedCompilerFilePath, string expectedArgs)
     {
-        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(ToArray(inputArgs), "csc.exe", "csc.dll");
+        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(inputArgs, "csc.exe", "csc.dll");
+        Assert.Equal(ToArray(expectedArgs), actualArgs);
+        Assert.Equal(expectedCompilerFilePath, actualCompilerFilePath);
+        static string[] ToArray(string arg) => arg.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+    }
+
+    [WindowsTheory]
+    [InlineData(@"  C:\Program Files\dotnet\dotnet.exe exec ""C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll"" a.cs", @"C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll", "a.cs")] 
+    [InlineData(@"C:\Program Files\dotnet\dotnet.exe exec ""C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll"" a.cs", @"C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll", "a.cs")] 
+    [InlineData(@"""C:\Program Files\dotnet\dotnet.exe"" exec ""C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll"" a.cs", @"C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll", "a.cs")] 
+    [InlineData(@"'C:\Program Files\dotnet\dotnet.exe' exec ""C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll"" a.cs", @"C:\Program Files\dotnet\sdk\8.0.301\Roslyn\bincore\csc.dll", "a.cs")] 
+    [InlineData(@"C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Roslyn\csc.exe a.cs b.cs", @"C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Roslyn\csc.exe", "a.cs b.cs")]
+    [InlineData(@"""C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Roslyn\csc.exe"" a.cs b.cs", @"C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin\Roslyn\csc.exe", "a.cs b.cs")]
+    public void ParseCompilerAndArgumentsCscWindows(string inputArgs, string? expectedCompilerFilePath, string expectedArgs)
+    {
+        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(inputArgs, "csc.exe", "csc.dll");
+        Assert.Equal(ToArray(expectedArgs), actualArgs);
+        Assert.Equal(expectedCompilerFilePath, actualCompilerFilePath);
+        static string[] ToArray(string arg) => arg.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+    }
+
+    [UnixTheory]
+    [InlineData(@"/dotnet/dotnet exec /dotnet/sdk/bincore/csc.dll a.cs", "/dotnet/sdk/bincore/csc.dll", "a.cs")] 
+    [InlineData(@"/dotnet/dotnet exec ""/dotnet/sdk/bincore/csc.dll"" a.cs", "/dotnet/sdk/bincore/csc.dll", "a.cs")] 
+    public void ParseCompilerAndArgumentsCscUnix(string inputArgs, string? expectedCompilerFilePath, string expectedArgs)
+    {
+        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(inputArgs, "csc.exe", "csc.dll");
         Assert.Equal(ToArray(expectedArgs), actualArgs);
         Assert.Equal(expectedCompilerFilePath, actualCompilerFilePath);
         static string[] ToArray(string arg) => arg.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
@@ -39,21 +65,29 @@ public void ParseCompilerAndArgumentsCsc(string inputArgs, string? expectedCompi
     [InlineData("vbc.exe a.cs b.cs", "vbc.exe", "a.cs b.cs")]
     public void ParseCompilerAndArgumentsVbc(string inputArgs, string? expectedCompilerFilePath, string expectedArgs)
     {
-        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(ToArray(inputArgs), "vbc.exe", "vbc.dll");
+        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(inputArgs, "vbc.exe", "vbc.dll");
         Assert.Equal(ToArray(expectedArgs), actualArgs);
         Assert.Equal(expectedCompilerFilePath, actualCompilerFilePath);
         static string[] ToArray(string arg) => arg.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
     }
 
-
     [Theory]
     [InlineData("dotnet not what we expect a.cs")]
     [InlineData("dotnet csc2 what we expect a.cs")]
     [InlineData("dotnet exec vbc.dll what we expect a.cs")]
+    [InlineData("empty")]
+    [InlineData("   ")]
     public void ParseCompilerAndArgumentsBad(string inputArgs)
     {
-        Assert.Throws<InvalidOperationException>(() => BinaryLogUtil.ParseTaskForCompilerAndArguments(ToArray(inputArgs), "csc.exe", "csc.dll"));
-        static string[] ToArray(string arg) => arg.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
+        Assert.Throws<InvalidOperationException>(() => BinaryLogUtil.ParseTaskForCompilerAndArguments(inputArgs, "csc.exe", "csc.dll"));
+    }
+
+    [Fact]
+    public void ParseCompilerAndArgumentsNull()
+    {
+        var (actualCompilerFilePath, actualArgs) = BinaryLogUtil.ParseTaskForCompilerAndArguments(null, "csc.exe", "csc.dll");
+        Assert.Null(actualCompilerFilePath);
+        Assert.Empty(actualArgs);
     }
 }
 

src/Basic.CompilerLog.UnitTests/ConditionalFacts.cs

@@ -14,3 +14,26 @@ public WindowsFactAttribute()
         }
     }
 }
+
+public sealed class WindowsTheoryAttribute : TheoryAttribute
+{
+    public WindowsTheoryAttribute()
+    {
+        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+        {
+            Skip = "This test is only supported on Windows";
+        }
+    }
+}
+
+public sealed class UnixTheoryAttribute : TheoryAttribute
+{
+    public UnixTheoryAttribute()
+    {
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+        {
+            Skip = "This test is only supported on Windows";
+        }
+    }
+}
+

src/Basic.CompilerLog.UnitTests/ProgramTests.cs

@@ -717,12 +717,23 @@ public void PrintCompilers()
         var tuple = reader.ReadAllCompilerAssemblies().Single();
         Assert.Contains($"""
             Compilers
-            {'\t'}File Path: {tuple.CompilerFilePath}
+            {'\t'}File Path: {tuple.FilePath}
             {'\t'}Assembly Name: {tuple.AssemblyName}
             {'\t'}Commit Hash: {tuple.CommitHash}
             """, output);
     }
 
+    /// <summary>
+    /// Ensure that print can run without the code being present
+    /// </summary>
+    [Fact]
+    public void PrintWithoutProject()
+    {
+        var (exitCode, output) = RunCompLogEx($"print {Fixture.RemovedBinaryLogPath} -c");
+        Assert.Equal(Constants.ExitSuccess, exitCode);
+        Assert.StartsWith("Projects", output);
+    }
+
     /// <summary>
     /// Engage the code to find files in the specified directory
     /// </summary>

src/Basic.CompilerLog.UnitTests/SolutionFixture.cs

@@ -40,6 +40,9 @@ public sealed class SolutionFixture : FixtureBase, IDisposable
 
     internal string ConsoleWithDiagnosticsProjectName => Path.GetFileName(ConsoleWithDiagnosticsProjectPath);
 
+    /// <summary>
+    /// The binary log for a project that has been removed from disk
+    /// </summary>
     internal string RemovedBinaryLogPath { get; }
 
     /// <summary>

src/Basic.CompilerLog.Util/BinaryLogReader.cs

@@ -1,4 +1,5 @@
 using System.Collections.Immutable;
+using System.Reflection;
 using Basic.CompilerLog.Util.Impl;
 using MessagePack.Formatters;
 using Microsoft.Build.Logging.StructuredLogger;
@@ -82,6 +83,7 @@
     {
         predicate ??= static _ => true;
 
+        _stream.Position = 0;
         return BinaryLogUtil.ReadAllCompilerCalls(_stream, predicate, ownerState: this);
     }
 
@@ -299,6 +301,38 @@
         return ReadAllReferenceDataCore(args.MetadataReferences.Select(x => x.Reference), args.MetadataReferences.Length);
     }
 
+    public List<CompilerAssemblyData> ReadAllCompilerAssemblies()
+    {
+        var list = new List<(string CompilerFilePath, AssemblyName AssemblyName)>();
+        var map = new Dictionary<string, (AssemblyName, string?)>(PathUtil.Comparer);
+        foreach (var compilerCall in ReadAllCompilerCalls())
+        {
+            if (compilerCall.CompilerFilePath is string compilerFilePath &&
+                !map.ContainsKey(compilerFilePath))
+            {
+                AssemblyName name;
+                string? commitHash;
+                try
+                {
+                    name = AssemblyName.GetAssemblyName(compilerFilePath);
+                    commitHash = RoslynUtil.ReadCompilerCommitHash(compilerFilePath);
+                }
+                catch
+                {
+                    name = new AssemblyName(Path.GetFileName(compilerFilePath));
+                    commitHash = null;
+                }
+
+                map[compilerCall.CompilerFilePath] = (name, commitHash);
+            }
+        }
+
+        return map
+            .OrderBy(x => x.Key, PathUtil.Comparer)
+            .Select(x => new CompilerAssemblyData(x.Key, x.Value.Item1, x.Value.Item2))
+            .ToList();
+    }
+
     /// <summary>
     /// Attempt to add all the generated files from generators. When successful the generators
     /// don't need to be run when re-hydrating the compilation.

src/Basic.CompilerLog.Util/BinaryLogUtil.cs

@@ -1,6 +1,7 @@
 using System.Collections;
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
+using System.Web;
 using Microsoft.Build.Framework;
 using Microsoft.Build.Logging.StructuredLogger;
 using Microsoft.CodeAnalysis;
@@ -92,10 +93,9 @@ public CompilationTaskData(MSBuildProjectData projectData, int targetId)
             }
 
             var kind = Kind ?? CompilerCallKind.Unknown;
-            var rawArgs = CommandLineParser.SplitCommandLineIntoArguments(CommandLineArguments, removeHashComments: true);
             var (compilerFilePath, args) = IsCSharp
-                ? ParseTaskForCompilerAndArguments(rawArgs, "csc.exe", "csc.dll")
-                : ParseTaskForCompilerAndArguments(rawArgs, "vbc.exe", "vbc.dll");
+                ? ParseTaskForCompilerAndArguments(CommandLineArguments, "csc.exe", "csc.dll")
+                : ParseTaskForCompilerAndArguments(CommandLineArguments, "vbc.exe", "vbc.dll");
 
             return new CompilerCall(
                 compilerFilePath,
@@ -288,37 +288,52 @@ void SetTargetFramework(ref string? targetFramework, IEnumerable? rawProperties)
     /// The argument list is going to include either `dotnet exec csc.dll` or `csc.exe`. Need 
     /// to skip past that to get to the real command line.
     /// </summary>
-    internal static (string? CompilerFilePath, string[] Arguments) ParseTaskForCompilerAndArguments(IEnumerable<string> args, string exeName, string dllName)
+    internal static (string? CompilerFilePath, string[] Arguments) ParseTaskForCompilerAndArguments(string? args, string exeName, string dllName)
     {
-        using var e = args.GetEnumerator();
+        if (args is null)
+        {
+            return (null, []);
+        }
+
+        var argsStart = 0;
+        var appFilePath = FindApplication(args.AsSpan(), ref argsStart, out bool isDotNet);
+        if (appFilePath.IsEmpty)
+        {
+            throw InvalidCommandLine();
+        }
+
+        var rawArgs = CommandLineParser.SplitCommandLineIntoArguments(args.Substring(argsStart), removeHashComments: true);
+        using var e = rawArgs.GetEnumerator();
 
         // The path to the executable is not escaped like the other command line arguments. Need
         // to skip until we see an exec or a path with the exe as the file name.
         string? compilerFilePath = null;
-        var found = false;
-        while (e.MoveNext())
+        if (isDotNet)
         {
-            if (PathUtil.Comparer.Equals(e.Current, "exec"))
+            // The path to the executable is not escaped like the other command line arguments. Need
+            // to skip until we see an exec or a path with the exe as the file name.
+            while (e.MoveNext())
             {
-                if (e.MoveNext() && PathUtil.Comparer.Equals(Path.GetFileName(e.Current), dllName))
+                if (PathUtil.Comparer.Equals(e.Current, "exec"))
                 {
-                    compilerFilePath = e.Current;
-                    found = true;
+                    if (e.MoveNext() && PathUtil.Comparer.Equals(Path.GetFileName(e.Current), dllName))
+                    {
+                        compilerFilePath = e.Current;
+                    }
+
+                    break;
                 }
-                break;
             }
-            else if (e.Current.EndsWith(exeName, PathUtil.Comparison))
+
+            if (compilerFilePath is null)
             {
-                compilerFilePath = e.Current;
-                found = true;
-                break;
+                throw InvalidCommandLine();
             }
         }
-
-        if (!found)
+        else
         {
-            var cmdLine = string.Join(" ", args);
-            throw new InvalidOperationException($"Could not parse command line arguments: {cmdLine}");
+            // Direct call to the compiler so we already have the compiler file path in hand
+            compilerFilePath = appFilePath.Trim('"').ToString();
         }
 
         var list = new List<string>();
@@ -328,6 +343,84 @@ internal static (string? CompilerFilePath, string[] Arguments) ParseTaskForCompi
         }
 
         return (compilerFilePath, list.ToArray());
+
+        // This search is tricky because there is no attempt by MSBuild to properly quote the 
+        ReadOnlySpan<char> FindApplication(ReadOnlySpan<char> args, ref int index, out bool isDotNet)
+        {
+            isDotNet = false;
+            while (index < args.Length && char.IsWhiteSpace(args[index]))
+            {
+                index++;
+            }
+
+            if (index >= args.Length)
+            {
+                return Span<char>.Empty;
+            }
+
+            if (args[index] is '"' or '\'')
+            {
+                // Quote based parsing, just move to the next quote and return.
+                var start = index + 1;
+                var quote = args[index];
+                do
+                {
+                    index++;
+                }
+                while (index < args.Length && args[index] != quote);
+
+                index++; // move past the quote
+                var span = args.Slice(start, index - start - 1);
+                isDotNet = CheckDotNet(span);
+                return span;
+            }
+            else
+            {
+                // Move forward until we see a signal that we've reached the compiler 
+                // executable.
+                //
+                // Note: Specifically don't need to handle the case of the application ending at the 
+                // exact end of the string. There is always at least one argument to the compiler.
+                while (index < args.Length)
+                {
+                    if (char.IsWhiteSpace(args[index]))
+                    {
+                        var span = args.Slice(0, index);
+                        if (span.EndsWith(exeName.AsSpan()))
+                        {
+                            isDotNet = false;
+                            return span;
+                        }
+
+                        if (CheckDotNet(span))
+                        {
+                            isDotNet = true;
+                            return span;
+                        }
+
+                        if (span.EndsWith(" exec".AsSpan()))
+                        {
+                            // This can happen when the dotnet host is not called dotnet. Need to back
+                            // up to the path before that.
+                            index -= 5;
+                            span = args.Slice(0, index);
+                            isDotNet = true;
+                            return span;
+                        }
+                    }
+
+                    index++;
+                }
+            }
+
+            return Span<char>.Empty;
+
+            bool CheckDotNet(ReadOnlySpan<char> span) =>
+                span.EndsWith("dotnet".AsSpan()) ||
+                span.EndsWith("dotnet.exe".AsSpan());
+        }
+
+        Exception InvalidCommandLine() => new InvalidOperationException($"Could not parse command line arguments: {args}");
     }
 
     /// <summary>

src/Basic.CompilerLog.Util/CompilerAssemblyData.cs

@@ -0,0 +1,16 @@
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Reflection;
+
+namespace Basic.CompilerLog.Util;
+
+public sealed class CompilerAssemblyData(string filePath, AssemblyName assemblyName, string? commitHash)
+{
+    public string FilePath { get; } = filePath;
+    public AssemblyName AssemblyName { get; } = assemblyName;
+    public string? CommitHash { get; } = commitHash;
+
+    [ExcludeFromCodeCoverage]
+    public override string ToString() => $"{FilePath} {CommitHash}";
+}
+