Fix ilrepack under mono

see: gluck/il-repack#203

Author: kll

build/utils.cake

@@ -78,7 +78,7 @@ void Build(string configuration)
     });
 }
 
-void ILRepackGitVersionExe(bool includeLibGit2Sharp, DirectoryPath target, DirectoryPath ilMerge)
+void ILRepackGitVersionExe(bool includeLibGit2Sharp, DirectoryPath target, DirectoryPath ilMerge, string configuration, string dotnetVersion)
 {
     var exeName = "GitVersion.exe";
     var keyFilePath = "./src/key.snk";
@@ -100,6 +100,13 @@ void ILRepackGitVersionExe(bool includeLibGit2Sharp, DirectoryPath target, Direc
         sourceFiles = sourceFiles - GetFiles(excludePattern);
     }
     var settings = new ILRepackSettings { AllowDup = "", Keyfile = keyFilePath, Internalize = true, NDebug = true, TargetKind = TargetKind.Exe, TargetPlatform  = TargetPlatformVersion.v4, XmlDocs = false };
+
+    if (IsRunningOnUnix())
+    {
+        var libFolder = GetDirectories($"**/GitVersionExe/bin/{configuration}/{dotnetVersion}").FirstOrDefault();
+        settings.Libs = new List<DirectoryPath> { libFolder };
+    }
+
     FixForMono(settings, "ILRepack.exe");
     ILRepack(outFilePath, targetPath, sourceFiles, settings);
 
@@ -117,7 +124,7 @@ void ILRepackGitVersionExe(bool includeLibGit2Sharp, DirectoryPath target, Direc
 
 void PublishILRepackedGitVersionExe(bool includeLibGit2Sharp, DirectoryPath targetDir, DirectoryPath ilMergDir, DirectoryPath outputDir, string configuration, string dotnetVersion)
 {
-    ILRepackGitVersionExe(includeLibGit2Sharp, targetDir, ilMergDir);
+    ILRepackGitVersionExe(includeLibGit2Sharp, targetDir, ilMergDir, configuration, dotnetVersion);
     CopyDirectory(ilMergDir, outputDir);
 
     if (includeLibGit2Sharp) {