Added extension methods for true and false comparison

Author: asbjornu

src/GitVersionExe/ArgumentParser.cs

@@ -172,11 +172,11 @@ public static Arguments ParseArguments(List<string> commandLineArguments)
 
                 if (IsSwitch("updateAssemblyInfo", name))
                 {
-                    if (new[] { "1", "true" }.Contains(value, StringComparer.OrdinalIgnoreCase))
+                    if (value.IsTrue())
                     {
                         arguments.UpdateAssemblyInfo = true;
                     }
-                    else if (new[] { "0", "false" }.Contains(value, StringComparer.OrdinalIgnoreCase))
+                    else if (value.IsFalse())
                     {
                         arguments.UpdateAssemblyInfo = false;
                     }
@@ -230,11 +230,11 @@ public static Arguments ParseArguments(List<string> commandLineArguments)
 
                 if (IsSwitch("showConfig", name))
                 {
-                    if (new[] { "1", "true" }.Contains(value, StringComparer.OrdinalIgnoreCase))
+                    if (value.IsTrue())
                     {
                         arguments.ShowConfig = true;
                     }
-                    else if (new[] { "0", "false" }.Contains(value, StringComparer.OrdinalIgnoreCase))
+                    else if (value.IsFalse())
                     {
                         arguments.UpdateAssemblyInfo = false;
                     }
@@ -265,11 +265,11 @@ public static Arguments ParseArguments(List<string> commandLineArguments)
 
                 if (IsSwitch("ensureassemblyinfo", name))
                 {
-                    if (new[] { "1", "true" }.Contains(value, StringComparer.OrdinalIgnoreCase))
+                    if (value.IsTrue())
                     {
                         arguments.EnsureAssemblyInfo = true;
                     }
-                    else if (new[] { "0", "false" }.Contains(value, StringComparer.OrdinalIgnoreCase))
+                    else if (value.IsFalse())
                     {
                         arguments.EnsureAssemblyInfo = false;
                     }

src/GitVersionExe/Extensions.cs

@@ -0,0 +1,37 @@
+namespace GitVersion
+{
+    using System;
+    using System.Linq;
+
+    public static class Extensions
+    {
+        private static string[] trues;
+        private static string[] falses;
+
+
+        static Extensions()
+        {
+            trues = new[]
+            {
+                "1",
+                "true"
+            };
+
+            falses = new[]
+            {
+                "0",
+                "false"
+            };
+        }
+
+        public static bool IsTrue(this string value)
+        {
+            return trues.Contains(value, StringComparer.OrdinalIgnoreCase);
+        }
+
+        public static bool IsFalse(this string value)
+        {
+            return falses.Contains(value, StringComparer.OrdinalIgnoreCase);
+        }
+    }
+}

src/GitVersionExe/GitVersionExe.csproj

@@ -65,6 +65,7 @@
   <ItemGroup>
     <Compile Include="ArgumentParser.cs" />
     <Compile Include="Arguments.cs" />
+    <Compile Include="Extensions.cs" />
     <Compile Include="HelpWriter.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="AssemblyInfo.cs" />