Add an option to run CodeFormatter on all projects/solutions within a directory.

src/CodeFormatter/Program.cs

@@ -19,12 +19,13 @@ internal static class Program
         private const string FileSwitch = "/file:";
         private const string ConfigSwitch = "/c:";
         private const string CopyrightSwitch = "/copyright:";
+        private const string SearchPatternSwitch = "/searchPattern:";
 
         private static int Main(string[] args)
         {
             if (args.Length < 1)
             {
-                Console.WriteLine("CodeFormatter <project or solution> [/file:<filename>] [/nocopyright] [/nounicode] [/tables] [/c:<config1,config2> [/copyright:file] [/verbose]");
+                Console.WriteLine("CodeFormatter <project or solution or directory> [/file:<filename>] [/nocopyright] [/nounicode] [/tables] [/c:<config1,config2> [/copyright:file] [/recursive] [/searchPattern:<searchPattern>] [/verbose]");
                 Console.WriteLine("    <filename>   - Only apply changes to files with specified name.");
                 Console.WriteLine("    <configs>    - Additional preprocessor configurations the formatter");
                 Console.WriteLine("                   should run under.");
@@ -34,14 +35,30 @@ private static int Main(string[] args)
                 Console.WriteLine("    <verbose>    - Verbose output");
                 Console.WriteLine("    <nounicode>  - Do not convert unicode strings to escape sequences");
                 Console.WriteLine("    <nocopyright>- Do not update the copyright message.");
+                Console.WriteLine("    <searchPattern>- Pattern to look for projects/solutions within the folder. Default '*.??proj'.");
                 return -1;
             }
 
-            var projectOrSolutionPath = args[0];
-            if (!File.Exists(projectOrSolutionPath))
+            var path = args[0];
+            string[] projectOrSolutionPath;
+            SearchOption searchOption = SearchOption.TopDirectoryOnly;
+            string searchPattern = "*.??proj";
+
+            if (!File.Exists(path))
             {
-                Console.Error.WriteLine("Project or solution {0} doesn't exist.", projectOrSolutionPath);
-                return -1;
+                if (!Directory.Exists(path))
+                {
+                    Console.Error.WriteLine("Project or solution or directory \"{0}\" doesn't exist.", path);
+                    return -1;
+                }
+                else
+                {
+                    projectOrSolutionPath = null;
+                }
+            }
+            else
+            {
+                projectOrSolutionPath = new[] { path };
             }
 
             var fileNamesBuilder = ImmutableArray.CreateBuilder<string>();
@@ -82,6 +99,15 @@ private static int Main(string[] args)
                         return -1;
                     }
                 }
+                else if (arg.StartsWith(SearchPatternSwitch, StringComparison.OrdinalIgnoreCase))
+                {
+                    var pattern = arg.Substring(SearchPatternSwitch.Length);
+
+                    if (pattern.Length > 0)
+                    {
+                        searchPattern = pattern;
+                    }
+                }
                 else if (comparer.Equals(arg, "/nocopyright"))
                 {
                     copyrightHeader = ImmutableArray<string>.Empty;
@@ -98,30 +124,60 @@ private static int Main(string[] args)
                 {
                     allowTables = true;
                 }
+                else if (comparer.Equals(arg, "/recursive") || comparer.Equals(arg, "/r"))
+                {
+                    searchOption = SearchOption.AllDirectories; 
+                }
                 else
                 {
                     ruleTypeBuilder.Add(arg);
                 }
             }
 
+            if (projectOrSolutionPath == null)
+            {
+                projectOrSolutionPath = Directory.EnumerateFiles(path, searchPattern, searchOption).ToArray();
+
+                if (projectOrSolutionPath.Length == 0)
+                {
+                    Console.Error.WriteLine("Projects or solutions are not found.");
+                    return -1;
+                }
+            }
+
             var cts = new CancellationTokenSource();
             var ct = cts.Token;
 
             Console.CancelKeyPress += delegate { cts.Cancel(); };
 
             try
             {
-                RunAsync(
-                    projectOrSolutionPath,
-                    ruleTypeBuilder.ToImmutableArray(),
-                    fileNamesBuilder.ToImmutableArray(),
-                    configBuilder.ToImmutableArray(),
-                    copyrightHeader,
-                    allowTables,
-                    convertUnicode,
-                    verbose,
-                    ct).Wait(ct);
-                Console.WriteLine("Completed formatting.");
+                var rules = ruleTypeBuilder.ToImmutableArray();
+                var fileNames = fileNamesBuilder.ToImmutableArray();
+                var config = configBuilder.ToImmutableArray();
+
+                foreach (string projectOrSolution in projectOrSolutionPath)
+                {
+                    RunAsync(
+                        projectOrSolution,
+                        rules,
+                        fileNames,
+                        config,
+                        copyrightHeader,
+                        allowTables,
+                        convertUnicode,
+                        verbose,
+                        ct).Wait(ct);
+                }
+
+                if (projectOrSolutionPath.Length > 1)
+                {
+                    Console.WriteLine("Completed formatting {0} projects/solutions.", projectOrSolutionPath.Length);
+                }
+                else
+                {
+                    Console.WriteLine("Completed formatting.");
+                }
                 return 0;
             }
             catch (AggregateException ex)