Replace the command line argument switches for GitVersion

Replace slash with dash in the command line argument switches for gitversion.exe, so it is more Unix friendly. It will still fail exeucting on OS X due to GitTools/GitVersion#890, but once that has been fixed, this should ensure that GitVersion executes successfully on OS X.

src/Cake.Common.Tests/Unit/Tools/GitVersion/GitVersionRunnerTests.cs

@@ -93,7 +93,7 @@ public void Should_Add_OutputType_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/output json", result.Args);
+                Assert.Equal("-output json", result.Args);
             }
 
             [Fact]
@@ -107,7 +107,7 @@ public void Should_Add_ShowVariable_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/showvariable FullSemVer", result.Args);
+                Assert.Equal("-showvariable FullSemVer", result.Args);
             }
 
             [Fact]
@@ -122,7 +122,7 @@ public void Should_Add_Username_And_Password_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/u \"bob\" /p \"password\"", result.Args);
+                Assert.Equal("-u \"bob\" -p \"password\"", result.Args);
             }
 
             [Fact]
@@ -136,7 +136,7 @@ public void Should_Add_UpdateAssemblyInfo_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/updateassemblyinfo", result.Args);
+                Assert.Equal("-updateassemblyinfo", result.Args);
             }
 
             [Fact]
@@ -151,7 +151,7 @@ public void Should_Add_UpdateAssemblyInfoFilePath_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/updateassemblyinfo \"c:/temp/assemblyinfo.cs\"", result.Args);
+                Assert.Equal("-updateassemblyinfo \"c:/temp/assemblyinfo.cs\"", result.Args);
             }
 
             [Fact]
@@ -165,7 +165,7 @@ public void Should_Add_RepositoryPath_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/targetpath \"c:/temp\"", result.Args);
+                Assert.Equal("-targetpath \"c:/temp\"", result.Args);
             }
 
             [Fact]
@@ -182,7 +182,7 @@ public void Should_Add_DynamicRepoSettings_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/url \"http://mygitrepo.co.uk\" /b master /c \"abcdef\" /dynamicRepoLocation \"c:/temp\"", result.Args);
+                Assert.Equal("-url \"http://mygitrepo.co.uk\" -b master -c \"abcdef\" -dynamicRepoLocation \"c:/temp\"", result.Args);
             }
 
             [Fact]
@@ -196,7 +196,7 @@ public void Should_Add_LogFilePath_To_Arguments_If_Set()
                 var result = fixture.Run();
 
                 // Then
-                Assert.Equal("/l \"c:/temp/gitversion.log\"", result.Args);
+                Assert.Equal("-l \"c:/temp/gitversion.log\"", result.Args);
             }
         }
     }

src/Cake.Common/Tools/GitVersion/GitVersionRunner.cs

@@ -79,34 +79,34 @@ private ProcessArgumentBuilder GetArguments(GitVersionSettings settings)
                 switch (settings.OutputType.Value)
                 {
                     case GitVersionOutput.Json:
-                        builder.Append("/output");
+                        builder.Append("-output");
                         builder.Append("json");
                         break;
                     case GitVersionOutput.BuildServer:
-                        builder.Append("/output");
+                        builder.Append("-output");
                         builder.Append("buildserver");
                         break;
                 }
             }
 
             if (!string.IsNullOrWhiteSpace(settings.ShowVariable))
             {
-                builder.Append("/showvariable");
+                builder.Append("-showvariable");
                 builder.Append(settings.ShowVariable);
             }
 
             if (!string.IsNullOrWhiteSpace(settings.UserName))
             {
-                builder.Append("/u");
+                builder.Append("-u");
                 builder.AppendQuoted(settings.UserName);
 
-                builder.Append("/p");
+                builder.Append("-p");
                 builder.AppendQuotedSecret(settings.Password);
             }
 
             if (settings.UpdateAssemblyInfo)
             {
-                builder.Append("/updateassemblyinfo");
+                builder.Append("-updateassemblyinfo");
 
                 if (settings.UpdateAssemblyInfoFilePath != null)
                 {
@@ -116,17 +116,17 @@ private ProcessArgumentBuilder GetArguments(GitVersionSettings settings)
 
             if (settings.RepositoryPath != null)
             {
-                builder.Append("/targetpath");
+                builder.Append("-targetpath");
                 builder.AppendQuoted(settings.RepositoryPath.FullPath);
             }
             else if (!string.IsNullOrWhiteSpace(settings.Url))
             {
-                builder.Append("/url");
+                builder.Append("-url");
                 builder.AppendQuoted(settings.Url);
 
                 if (!string.IsNullOrWhiteSpace(settings.Branch))
                 {
-                    builder.Append("/b");
+                    builder.Append("-b");
                     builder.Append(settings.Branch);
                 }
                 else
@@ -136,20 +136,20 @@ private ProcessArgumentBuilder GetArguments(GitVersionSettings settings)
 
                 if (!string.IsNullOrWhiteSpace(settings.Commit))
                 {
-                    builder.Append("/c");
+                    builder.Append("-c");
                     builder.AppendQuoted(settings.Commit);
                 }
 
                 if (settings.DynamicRepositoryPath != null)
                 {
-                    builder.Append("/dynamicRepoLocation");
+                    builder.Append("-dynamicRepoLocation");
                     builder.AppendQuoted(settings.DynamicRepositoryPath.FullPath);
                 }
             }
 
             if (settings.LogFilePath != null)
             {
-                builder.Append("/l");
+                builder.Append("-l");
                 builder.AppendQuoted(settings.LogFilePath.FullPath);
             }