Only allow use of a single baseline result file. Update help output.

UnityPerformanceBenchmarkReporter/OptionsParser.cs

@@ -13,6 +13,15 @@ namespace UnityPerformanceBenchmarkReporter
         private readonly string learnMore =
             "To learn more about the Unity Performance Benchmark Reporter visit the Unity Performance Benchmark Reporter GitHub wiki at https://github.com/Unity-Technologies/PerformanceBenchmarkReporter/wiki.";
 
+        private readonly string commandLineOptionFormat =
+            "// Command line option format\r\n--results=<Path to a test result XML filename OR directory>... [--baseline=\"Path to a baseline XML filename\"] [--reportdirpath=\"Path to where the report will be written\"]";
+
+        private readonly string example1 = "// Run reporter with one performance test result .xml file\r\n--results=\"G:\\My Drive\\XRPerfRuns\\results\\results.xml\"";
+
+        private readonly string example2 = "// Run reporter against a directory containing one or more performance test result .xml files\r\n--results=\"G:\\My Drive\\XRPerfRuns\\results\"  ";
+
+        private readonly string example3 = "// Run reporter against a directory containing one or more performance test result .xml files, and a baseline .xml result file\r\n--results=\"G:\\My Drive\\XRPerfRuns\\results\" --baseline=\"G:\\My Drive\\XRPerfRuns\\baselines\\baseline.xml\" ";
+
         public enum ResultType
         {
             Test,
@@ -53,17 +62,17 @@ namespace UnityPerformanceBenchmarkReporter
         {
             return new OptionSet()
                 .Add("?|help|h", "Prints out the options.", option => help = option != null)
-                .Add("testresultsxmlsource=", "REQUIRED - Path to a test result XML filename or directory. Directories are searched resursively. You can repeat this option with multiple result file or directory paths.",
+                .Add("results|testresultsxmlsource=", "REQUIRED - Path to a test result XML filename OR directory. Directories are searched resursively. You can repeat this option with multiple result file or directory paths.",
                     xmlsource =>
                     {
                         performanceBenchmark.AddXmlSourcePath(xmlsource, "testresultsxmlsource", ResultType.Test);
                     })
-                .Add("baselinexmlsource:", "OPTIONAL - Path to a baseline XML filename or directory. Directories are searched resursively. You can repeat this option with multiple baseline file or directory paths.",
+                .Add("baseline|baselinexmlsource:", "OPTIONAL - Path to a baseline XML filename.",
                         xmlsource =>
                         {
                             performanceBenchmark.AddXmlSourcePath(xmlsource, "baselinexmlsource", ResultType.Baseline);
                         })
-                .Add("reportdirpath:", "OPTIONAL - Path to directory where the UnityPerformanceBenchmark report will be written. Default is current working directory.",
+                .Add("report|reportdirpath:", "OPTIONAL - Path to where the report will be written. Default is current working directory.",
                     performanceBenchmark.AddReportDirPath);
         }
 
@@ -78,7 +87,12 @@ namespace UnityPerformanceBenchmarkReporter
 
             Console.WriteLine(about + "\r\n");
             Console.WriteLine(learnMore + "\r\n");
-            Console.WriteLine("Usage is:");
+            Console.WriteLine("Usage is:" + "\r\n");
+            Console.WriteLine(commandLineOptionFormat + "\r\n");
+            Console.WriteLine(example1 + "\r\n");
+            Console.WriteLine(example2 + "\r\n");
+            Console.WriteLine(example3 + "\r\n");
+            Console.WriteLine("Options: \r\n");
             optionSet.WriteOptionDescriptions(Console.Error);
             Environment.Exit(-1);
         }

UnityPerformanceBenchmarkReporter/PerformanceBenchmark.cs

@@ -70,7 +70,7 @@ namespace UnityPerformanceBenchmarkReporter
             HashSet<string> xmlFileNamePaths,
             bool isBaseline = false)
         {
-            if (xmlDirectoryPaths.Any())
+            if (!isBaseline && xmlDirectoryPaths.Any())
             {
                 foreach (var xmlDirectory in xmlDirectoryPaths)
                 {