capnp fixes for Linux

CapnpC.CSharp.Generator.Tests/FeatureSteps/CodeGeneratorSteps.cs

@@ -27,18 +27,29 @@ namespace CapnpC.CSharp.Generator.Tests
             return assembly.GetManifestResourceStream(urn);
         }
 
-        internal static bool IsCapnpExeInstalled()
+        internal static bool IsCapnpInstalled()
         {
-            using (var process = Process.Start("where", "capnp.exe"))
+            try
             {
-                if (process == null)
+                var startInfo = new ProcessStartInfo(CapnpCompilation.CapnpCompilerFilename, "--version");
-                    Assert.Fail("Unable to start 'where'");
+                startInfo.UseShellExecute = false;
+                startInfo.RedirectStandardOutput = true;
+                startInfo.RedirectStandardError = true;
+
+                using (var process = Process.Start(startInfo))
+                {
+                    Assert.IsNotNull(process, $"Unable to start '{CapnpCompilation.CapnpCompilerFilename}'");
 
                     process.WaitForExit();
 
                     return process.ExitCode == 0;
                 }
             }
+            catch (Exception)
+            {
+                return false;
+            }
+        }
 
         [Given(@"I have a binary code generator request ""(.*)""")]
         [Given(@"I have a binary code generator request (.*)")]
@@ -112,9 +123,9 @@ namespace CapnpC.CSharp.Generator.Tests
         [Given(@"capnp\.exe is installed on my system")]
         public void GivenCapnp_ExeIsInstalledOnMySystem()
         {
-            if (!IsCapnpExeInstalled())
+            if (!IsCapnpInstalled())
             {
-                Assert.Inconclusive("capnp.exe not found. Precondition of this test is not met.");
+                Assert.Inconclusive("Capnp compiler not found. Precondition of this test is not met.");
             }
         }
 
@@ -151,9 +162,9 @@ namespace CapnpC.CSharp.Generator.Tests
         [Given(@"capnp\.exe is not installed on my system")]
         public void GivenCapnp_ExeIsNotInstalledOnMySystem()
         {
-            if (IsCapnpExeInstalled())
+            if (IsCapnpInstalled())
             {
-                Assert.Inconclusive("capnp.exe found. Precondition of this test is not met.");
+                Assert.Inconclusive("Capnp compiler found. Precondition of this test is not met.");
             }
         }
 

CapnpC.CSharp.Generator.Tests/Util/InlineAssemblyCompiler.cs

@@ -22,7 +22,12 @@ namespace CapnpC.CSharp.Generator.Tests.Util
 
             string capnpRuntimePath = Path.GetFullPath(Path.Combine(
                 Assembly.GetExecutingAssembly().Location,
-                @"..\..\..\..\..\Capnp.Net.Runtime\bin\Debug\netcoreapp2.1\Capnp.Net.Runtime.dll"));
+                "..", "..", "..", "..", "..",
+                "Capnp.Net.Runtime",
+                "bin",
+                "Debug",
+                "netcoreapp2.1",
+                "Capnp.Net.Runtime.dll"));
 
             var capnpRuntimeMetadataRef = MetadataReference.CreateFromFile(capnpRuntimePath);
 

CapnpC.CSharp.Generator/CapnpCompilation.cs

@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
 using System.Text.RegularExpressions;
 
 [assembly: InternalsVisibleTo("CapnpC.CSharp.Generator.Tests")]
@@ -15,6 +16,14 @@ namespace CapnpC.CSharp.Generator
     /// </summary>
     public static class CapnpCompilation
     {
+        /// <summary>
+        /// Returns the basename of the capnp executable
+        /// </summary>
+        public static string CapnpCompilerFilename
+        {
+            get => RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "capnp.exe" : "capnp";
+        }
+
         /// <summary>
         /// Generates C# code from given input stream
         /// </summary>
@@ -60,7 +69,7 @@ namespace CapnpC.CSharp.Generator
                 argList.Add($"-o-");
                 argList.AddRange(arguments);
 
-                compiler.StartInfo.FileName = "capnp.exe";
+                compiler.StartInfo.FileName = CapnpCompilerFilename;
                 compiler.StartInfo.Arguments = string.Join(" ", argList);
                 compiler.StartInfo.UseShellExecute = false;
                 compiler.StartInfo.RedirectStandardOutput = true;

CapnpC.CSharp.Generator/CodeGen/CodeGenerator.cs

@@ -210,7 +210,7 @@
 
             cu = cu.AddMembers(ns);
 
-            return cu.NormalizeWhitespace().ToFullString();
+            return cu.NormalizeWhitespace("    ", Environment.NewLine).ToFullString();
         }
 
         public IReadOnlyList<FileGenerationResult> Generate()

CapnpC.CSharp.MsBuild.Generation/CapnpC.CSharp.MsBuild.Generation.csproj

@@ -107,7 +107,7 @@
   </ItemGroup>
 
   <Target Name="PostBuild" AfterTargets="PostBuildEvent">
-    <Exec Command="rmdir /s /q $(SolutionDir)MsBuildGenerationTest\obj" />
+    <RemoveDir Directories="$(SolutionDir)\MsBuildGenerationTest\obj" />
   </Target>
 
 </Project>