mcs/tools/corcompare/mono-api-html/ApiDiff.cs

   1 //
   2 // The main differences with mono-api-diff are:
   3 // * this tool directly produce HTML similar to gdiff.sh used for Xamarin.iOS
   4 // * this tool reports changes in an "evolutionary" way, not in a breaking way,
   5 //   i.e. it does not assume the source assembly is right (but simply older)
   6 // * the diff .xml output was not easy to convert back into the HTML format
   7 //   that gdiff.sh produced
   8 //
   9 // Authors
  10 //    Sebastien Pouliot  <sebastien@xamarin.com>
  11 //
  12 // Copyright 2013-2014 Xamarin Inc. http://www.xamarin.com
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.IO;
  36 using System.Collections.Generic;
  37 using System.Text.RegularExpressions;
  38
  39 using Mono.Options;
  40
  41 namespace Xamarin.ApiDiff {
  42
  43         public static class State {
  44                 static TextWriter output;
  45
  46                 public static TextWriter Output {
  47                         get {
  48                                 if (output == null)
  49                                         output = Console.Out;
  50                                 return output;
  51                         }
  52                         set { output = value; }
  53                 }
  54
  55                 public static string Assembly { get; set; }
  56                 public static string Namespace { get; set; }
  57                 public static string Type { get; set; }
  58                 public static string BaseType { get; set; }
  59
  60                 public static int Indent { get; set; }
  61
  62                 static List<Regex> ignoreAdded = new List<Regex> ();
  63                 public static List<Regex> IgnoreAdded {
  64                         get { return ignoreAdded; }
  65                 }
  66
  67                 static List<Regex> ignoreRemoved = new List<Regex> ();
  68                 public static List<Regex> IgnoreRemoved {
  69                         get { return ignoreRemoved; }
  70                 }
  71
  72                 public static bool Lax;
  73         }
  74
  75         class Program {
  76
  77                 public static int Main (string[] args)
  78                 {
  79                         var showHelp = false;
  80                         string diff = null;
  81                         List<string> extra = null;
  82
  83                         var options = new OptionSet {
  84                                 { "h|help", "Show this help", v => showHelp = true },
  85                                 { "d|diff=", "HTML diff file out output (omit for stdout)", v => diff = v },
  86                                 { "i|ignore=", "Ignore both added and removed members whose description matches a given C# regular expression (see below).",
  87                                         v => {
  88                                                 var r = new Regex (v);
  89                                                 State.IgnoreAdded.Add (r);
  90                                                 State.IgnoreRemoved.Add (r);
  91                                         }
  92                                 },
  93                                 { "a|ignore-added=", "Ignore added members whose description matches a given C# regular expression (see below).",
  94                                         v => State.IgnoreAdded.Add (new Regex (v))
  95                                 },
  96                                 { "r|ignore-removed=", "Ignore removed members whose description matches a given C# regular expression (see below).",
  97                                         v => State.IgnoreRemoved.Add (new Regex (v))
  98                                 },
  99                                 { "x|lax", "Ignore duplicate XML entries", v => State.Lax = true }
 100                         };
 101
 102                         try {
 103                                 extra = options.Parse (args);
 104                         } catch (OptionException e) {
 105                                 Console.WriteLine ("Option error: {0}", e.Message);
 106                                 showHelp = true;
 107                         }
 108
 109                         if (showHelp || extra == null || extra.Count < 2 || extra.Count > 3) {
 110                                 Console.WriteLine (@"Usage: mono-api-html [options] <reference.xml> <assembly.xml> [diff.html]");
 111                                 Console.WriteLine ();
 112                                 Console.WriteLine ("Available options:");
 113                                 options.WriteOptionDescriptions (Console.Out);
 114                                 Console.WriteLine ();
 115                                 Console.WriteLine ("Ignoring Members:");
 116                                 Console.WriteLine ();
 117                                 Console.WriteLine ("  Members that were added can be filtered out of the diff by using the");
 118                                 Console.WriteLine ("  -i, --ignore-added option. The option takes a C# regular expression");
 119                                 Console.WriteLine ("  to match against member descriptions. For example, to ignore the");
 120                                 Console.WriteLine ("  introduction of the interfaces 'INSCopying' and 'INSCoding' on types");
 121                                 Console.WriteLine ("  pass the following to mono-api-html:");
 122                                 Console.WriteLine ();
 123                                 Console.WriteLine ("    mono-api-html ... -i 'INSCopying$' -i 'INSCoding$'");
 124                                 Console.WriteLine ();
 125                                 Console.WriteLine ("  The regular expressions will match any member description ending with");
 126                                 Console.WriteLine ("  'INSCopying' or 'INSCoding'.");
 127                                 Console.WriteLine ();
 128                                 return 1;
 129                         }
 130
 131                         var input = extra [0];
 132                         var output = extra [1];
 133                         if (extra.Count == 3 && diff == null)
 134                                 diff = extra [2];
 135
 136                         try {
 137                                 var ac = new AssemblyComparer (input, output);
 138                                 if (diff != null) {
 139                                         string diffHtml = String.Empty;
 140                                         using (var writer = new StringWriter ()) {
 141                                                 State.Output = writer;
 142                                                 ac.Compare ();
 143                                                 diffHtml = State.Output.ToString ();
 144                                         }
 145                                         if (diffHtml.Length > 0) {
 146                                                 using (var file = new StreamWriter (diff)) {
 147                                                         if (ac.SourceAssembly == ac.TargetAssembly) {
 148                                                                 file.WriteLine ("<h1>{0}.dll</h1>", ac.SourceAssembly);
 149                                                         } else {
 150                                                                 file.WriteLine ("<h1>{0}.dll vs {1}.dll</h1>", ac.SourceAssembly, ac.TargetAssembly);
 151                                                         }
 152                                                         file.Write (diffHtml);
 153                                                 }
 154                                         }
 155                                 } else {
 156                                         State.Output = Console.Out;
 157                                         ac.Compare ();
 158                                 }
 159                         }
 160                         catch (Exception e) {
 161                                 Console.WriteLine (e);
 162                                 return 1;
 163                         }
 164                         return 0;
 165                 }
 166         }
 167 }