@joebigelow / wix-1
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1 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
2
3 using System;
4 using System.IO;
5 using System.Collections;
6
7 namespace WixToolset.Dtf.Tools.DDiff
8 {
9 public class DirectoryDiffEngine : IDiffEngine
10 {
11 public DirectoryDiffEngine()
12 {
13 }
14
15 public virtual float GetDiffQuality(string diffInput1, string diffInput2, string[] options, IDiffEngineFactory diffFactory)
16 {
17 if(diffInput1 != null && Directory.Exists(diffInput1) &&
18 diffInput2 != null && Directory.Exists(diffInput2))
19 {
20 return .70f;
21 }
22 else
23 {
24 return 0;
25 }
26 }
27
28 public bool GetDiff(string diffInput1, string diffInput2, string[] options, TextWriter diffOutput, string linePrefix, IDiffEngineFactory diffFactory)
29 {
30 bool difference = false;
31 IComparer caseInsComp = CaseInsensitiveComparer.Default;
32
33 string[] files1 = Directory.GetFiles(diffInput1);
34 string[] files2 = Directory.GetFiles(diffInput2);
35 for(int i1 = 0; i1 < files1.Length; i1++)
36 {
37 files1[i1] = Path.GetFileName(files1[i1]);
38 }
39 for(int i2 = 0; i2 < files2.Length; i2++)
40 {
41 files2[i2] = Path.GetFileName(files2[i2]);
42 }
43 Array.Sort(files1, caseInsComp);
44 Array.Sort(files2, caseInsComp);
45
46 for(int i1 = 0, i2 = 0; i1 < files1.Length || i2 < files2.Length; )
47 {
48 int comp;
49 if(i1 == files1.Length)
50 {
51 comp = 1;
52 }
53 else if(i2 == files2.Length)
54 {
55 comp = -1;
56 }
57 else
58 {
59 comp = caseInsComp.Compare(files1[i1], files2[i2]);
60 }
61 if(comp < 0)
62 {
63 diffOutput.WriteLine("{0}< {1}", linePrefix, files1[i1]);
64 i1++;
65 difference = true;
66 }
67 else if(comp > 0)
68 {
69 diffOutput.WriteLine("{0}> {1}", linePrefix, files2[i2]);
70 i2++;
71 difference = true;
72 }
73 else
74 {
75 string file1 = Path.Combine(diffInput1, files1[i1]);
76 string file2 = Path.Combine(diffInput2, files2[i2]);
77 IDiffEngine diffEngine = diffFactory.GetDiffEngine(file1, file2, options);
78 StringWriter sw = new StringWriter();
79 if(diffEngine.GetDiff(file1, file2, options, sw, linePrefix + " ", diffFactory))
80 {
81 diffOutput.WriteLine("{0}{1}", linePrefix, files1[i1]);
82 diffOutput.Write(sw.ToString());
83 difference = true;
84 }
85 i1++;
86 i2++;
87 }
88 }
89
90 string[] dirs1 = Directory.GetDirectories(diffInput1);
91 string[] dirs2 = Directory.GetDirectories(diffInput2);
92 for(int i1 = 0; i1 < dirs1.Length; i1++)
93 {
94 dirs1[i1] = Path.GetFileName(dirs1[i1]);
95 }
96 for(int i2 = 0; i2 < dirs2.Length; i2++)
97 {
98 dirs2[i2] = Path.GetFileName(dirs2[i2]);
99 }
100 Array.Sort(dirs1, caseInsComp);
101 Array.Sort(dirs2, caseInsComp);
102
103 for(int i1 = 0, i2 = 0; i1 < dirs1.Length || i2 < dirs2.Length; )
104 {
105 int comp;
106 if(i1 == dirs1.Length)
107 {
108 comp = 1;
109 }
110 else if(i2 == dirs2.Length)
111 {
112 comp = -1;
113 }
114 else
115 {
116 comp = caseInsComp.Compare(dirs1[i1], dirs2[i2]);
117 }
118 if(comp < 0)
119 {
120 diffOutput.WriteLine("{0}< {1}", linePrefix, dirs1[i1]);
121 i1++;
122 difference = true;
123 }
124 else if(comp > 0)
125 {
126 diffOutput.WriteLine("{0}> {1}", linePrefix, dirs2[i2]);
127 i2++;
128 difference = true;
129 }
130 else
131 {
132 string dir1 = Path.Combine(diffInput1, dirs1[i1]);
133 string dir2 = Path.Combine(diffInput2, dirs2[i2]);
134 IDiffEngine diffEngine = diffFactory.GetDiffEngine(dir1, dir2, options);
135 StringWriter sw = new StringWriter();
136 if(diffEngine.GetDiff(dir1, dir2, options, sw, linePrefix + " ", diffFactory))
137 {
138 diffOutput.WriteLine("{0}{1}\\", linePrefix, dirs1[i1]);
139 diffOutput.Write(sw.ToString());
140 difference = true;
141 }
142 i1++;
143 i2++;
144 }
145 }
146 return difference;
147 }
148
149 public virtual IDiffEngine Clone()
150 {
151 return new DirectoryDiffEngine();
152 }
153 }
154 }