mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/BatchingImpl.cs

   1 //
   2 // BatchingImpl.cs: Class that implements BatchingAlgorithm from the wiki.
   3 //
   4 // Author:
   5 //   Marek Sieradzki (marek.sieradzki@gmail.com)
   6 //
   7 // (C) 2005 Marek Sieradzki
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 #if NET_2_0
  29
  30 using System;
  31 using System.IO;
  32 using System.Xml;
  33
  34 namespace Microsoft.Build.BuildEngine {
  35         internal class BatchingImpl {
  36
  37                 string          inputs;
  38                 string          outputs;
  39                 Project         project;
  40
  41                 public BatchingImpl (Project project, XmlElement targetElement)
  42                 {
  43                         if (targetElement == null)
  44                                 throw new ArgumentNullException ("targetElement");
  45                         if (project == null)
  46                                 throw new ArgumentNullException ("project");
  47
  48                         this.project = project;
  49
  50                         inputs = targetElement.GetAttribute ("Inputs");
  51                         outputs = targetElement.GetAttribute ("Outputs");
  52                 }
  53
  54                 public bool BuildNeeded ()
  55                 {
  56                         // FIXME: change this to ITaskItem instead of string
  57
  58                         Expression inputExpr, outputExpr;
  59                         string[] inputFiles, outputFiles;
  60                         DateTime oldestInput, youngestOutput;
  61
  62                         if (inputs == String.Empty) {
  63                                 return true;
  64                         }
  65                         if (outputs == String.Empty) {
  66                                 return true;
  67                         }
  68
  69                         inputExpr = new Expression ();
  70                         inputExpr.Parse (inputs);
  71                         outputExpr = new Expression ();
  72                         outputExpr.Parse (outputs);
  73
  74                         inputFiles = (string[]) inputExpr.ConvertTo (project, typeof (string[]));
  75                         outputFiles = (string[]) outputExpr.ConvertTo (project, typeof (string[]));
  76
  77                         if (inputFiles == null) {
  78                                 return true;
  79                         }
  80                         if (outputFiles == null) {
  81                                 return true;
  82                         }
  83                         if (inputFiles.Length == 0) {
  84                                 return true;
  85                         }
  86                         if (outputFiles.Length == 0) {
  87                                 return true;
  88                         }
  89
  90                         if (File.Exists (inputFiles [0])) {
  91                                 oldestInput = File.GetLastWriteTime (inputFiles [0]);
  92                         } else {
  93                                 return true;
  94                         }
  95                         if (File.Exists (outputFiles [0])) {
  96                                 youngestOutput = File.GetLastWriteTime (outputFiles [0]);
  97                         } else {
  98                                 return true;
  99                         }
 100
 101                         foreach (string file in inputFiles) {
 102                                 if (file.Trim () == String.Empty)
 103                                         continue;
 104
 105                                 if (File.Exists (file.Trim ())) {
 106                                         if (File.GetLastWriteTime (file.Trim ()) > oldestInput)
 107                                                 oldestInput = File.GetLastWriteTime (file.Trim ());
 108                                 } else {
 109                                         return true;
 110                                 }
 111                         }
 112                         foreach (string file in outputFiles) {
 113                                 if (file.Trim () == String.Empty)
 114                                         continue;
 115
 116                                 if (File.Exists (file.Trim ())) {
 117                                         if (File.GetLastWriteTime (file.Trim ()) < youngestOutput)
 118                                                 youngestOutput = File.GetLastWriteTime (file.Trim ());
 119                                 } else {
 120                                         return true;
 121                                 }
 122                         }
 123
 124                         if (oldestInput > youngestOutput) {
 125                                 return true;
 126                         }
 127                         else {
 128                                 return false;
 129                         }
 130                 }
 131
 132                 // FIXME: should do everything from task batching specification, not just run task once
 133                 public bool BatchBuildTask (BuildTask buildTask)
 134                 {
 135                         if (buildTask.Condition == String.Empty)
 136                                 return buildTask.Execute ();
 137
 138                         ConditionExpression ce = ConditionParser.ParseCondition (buildTask.Condition);
 139
 140                         if (ce.BoolEvaluate (project))
 141                                 return buildTask.Execute ();
 142                         else
 143                         // FIXME: skipped, it should be logged
 144                                 return true;
 145
 146                 }
 147         }
 148 }
 149
 150 #endif