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annotate src/com/tmate/hgkit/ll/LocalHgRepo.java @ 16:254078595653

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author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 27 Dec 2010 01:00:53 +0100
parents 865bf07f381f
children 02ee376bee79
rev   line source
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1 /*
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2 * Copyright (c) 2010 Artem Tikhomirov
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3 */
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4 package com.tmate.hgkit.ll;
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5
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6 import java.io.BufferedReader;
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7 import java.io.File;
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8 import java.io.FileInputStream;
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9 import java.io.IOException;
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10 import java.io.InputStreamReader;
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11 import java.lang.ref.SoftReference;
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12 import java.util.Arrays;
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13 import java.util.HashMap;
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14 import java.util.TreeSet;
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15
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16 import com.tmate.hgkit.fs.DataAccessProvider;
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17
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18 /**
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19 * @author artem
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20 */
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21 public class LocalHgRepo extends HgRepository {
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22
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23 private File repoDir; // .hg folder
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24 private final String repoLocation;
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25 private final DataAccessProvider dataAccess;
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26
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27 public LocalHgRepo(String repositoryPath) {
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28 setInvalid(true);
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29 repoLocation = repositoryPath;
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30 dataAccess = null;
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31 }
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32
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33 public LocalHgRepo(File repositoryRoot) throws IOException {
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34 assert ".hg".equals(repositoryRoot.getName()) && repositoryRoot.isDirectory();
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35 setInvalid(false);
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36 repoDir = repositoryRoot;
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37 repoLocation = repositoryRoot.getParentFile().getCanonicalPath();
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38 dataAccess = new DataAccessProvider();
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39 parseRequires();
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40 }
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41
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42 @Override
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43 public String getLocation() {
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44 return repoLocation;
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45 }
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46
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47 // XXX package-local, unless there are cases when required from outside (guess, working dir/revision walkers may hide dirstate access and no public visibility needed)
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48 public final HgDirstate loadDirstate() {
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49 // XXX may cache in SoftReference if creation is expensive
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50 return new HgDirstate(this, new File(repoDir, "dirstate"));
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51 }
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52
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53 // package-local, see comment for loadDirstate
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54 public final HgIgnore loadIgnore() {
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55 return new HgIgnore(this);
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56 }
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57
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58 /*package-local*/ DataAccessProvider getDataAccess() {
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59 return dataAccess;
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60 }
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61
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62 /*package-local*/ File getRepositoryRoot() {
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63 return repoDir;
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64 }
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65
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66 private final HashMap<String, SoftReference<RevlogStream>> streamsCache = new HashMap<String, SoftReference<RevlogStream>>();
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67
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68 /**
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69 * path - repository storage path (i.e. one usually with .i or .d)
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70 */
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71 @Override
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72 protected RevlogStream resolve(String path) {
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73 final SoftReference<RevlogStream> ref = streamsCache.get(path);
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74 RevlogStream cached = ref == null ? null : ref.get();
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75 if (cached != null) {
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76 return cached;
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77 }
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78 File f = new File(repoDir, path);
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79 if (f.exists()) {
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80 RevlogStream s = new RevlogStream(dataAccess, f);
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81 streamsCache.put(path, new SoftReference<RevlogStream>(s));
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82 return s;
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83 }
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84 return null;
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85 }
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86
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87 @Override
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88 public HgDataFile getFileNode(String path) {
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89 String nPath = normalize(path);
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90 String storagePath = toStoragePath(nPath, true);
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91 RevlogStream content = resolve(storagePath);
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92 // XXX no content when no file? or HgDataFile.exists() to detect that? How about files that were removed in previous releases?
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93 return new HgDataFile(this, nPath, content);
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94 }
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95
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96 private boolean revlogv1;
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97 private boolean store;
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98 private boolean fncache;
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99 private boolean dotencode;
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100
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101
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102 private void parseRequires() {
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103 File requiresFile = new File(repoDir, "requires");
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104 if (!requiresFile.exists()) {
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105 return;
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106 }
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107 try {
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108 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(requiresFile)));
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109 String line;
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110 while ((line = br.readLine()) != null) {
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111 revlogv1 |= "revlogv1".equals(line);
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112 store |= "store".equals(line);
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113 fncache |= "fncache".equals(line);
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114 dotencode |= "dotencode".equals(line);
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115 }
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116 } catch (IOException ex) {
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117 ex.printStackTrace(); // FIXME log
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118 }
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119 }
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120
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121 // FIXME document what path argument is, whether it includes .i or .d, and whether it's 'normalized' (slashes) or not.
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122 // since .hg/store keeps both .i files and files without extension (e.g. fncache), guees, for data == false
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123 // we shall assume path has extension
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124 // FIXME much more to be done, see store.py:_hybridencode
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125 // @see http://mercurial.selenic.com/wiki/CaseFoldingPlan
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126 @Override
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127 protected String toStoragePath(String path, boolean data) {
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128 path = normalize(path);
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129 final String STR_STORE = "store/";
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130 final String STR_DATA = "data/";
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131 final String STR_DH = "dh/";
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132 if (!data) {
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133 return this.store ? STR_STORE + path : path;
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134 }
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135 path = path.replace(".hg/", ".hg.hg/").replace(".i/", ".i.hg/").replace(".d/", ".d.hg/");
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136 StringBuilder sb = new StringBuilder(path.length() << 1);
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137 if (store || fncache) {
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138 // encodefilename
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139 final String reservedChars = "\\:*?\"<>|";
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140 // in fact, \\ is unlikely to match, ever - we've replaced all of them already, above. Just regards to store.py
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141 int x;
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142 char[] hexByte = new char[2];
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143 for (int i = 0; i < path.length(); i++) {
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144 final char ch = path.charAt(i);
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145 if (ch >= 'a' && ch <= 'z') {
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146 sb.append(ch); // POIRAE
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147 } else if (ch >= 'A' && ch <= 'Z') {
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148 sb.append('_');
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149 sb.append(Character.toLowerCase(ch)); // Perhaps, (char) (((int) ch) + 32)? Even better, |= 0x20?
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150 } else if ( (x = reservedChars.indexOf(ch)) != -1) {
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151 sb.append('~');
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152 sb.append(toHexByte(reservedChars.charAt(x), hexByte));
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153 } else if ((ch >= '~' /*126*/ && ch <= 255) || ch < ' ' /*32*/) {
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154 sb.append('~');
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155 sb.append(toHexByte(ch, hexByte));
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156 } else if (ch == '_') {
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157 // note, encoding from store.py:_buildencodefun and :_build_lower_encodefun
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158 // differ in the way they process '_' (latter doesn't escape it)
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159 sb.append('_');
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160 sb.append('_');
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161 } else {
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162 sb.append(ch);
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163 }
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164 }
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165 // auxencode
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166 if (fncache) {
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167 x = 0; // last segment start
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168 final TreeSet<String> windowsReservedFilenames = new TreeSet<String>();
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169 windowsReservedFilenames.addAll(Arrays.asList("con prn aux nul com1 com2 com3 com4 com5 com6 com7 com8 com9 lpt1 lpt2 lpt3 lpt4 lpt5 lpt6 lpt7 lpt8 lpt9".split(" ")));
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170 do {
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171 int i = sb.indexOf("/", x);
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172 if (i == -1) {
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173 i = sb.length();
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174 }
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175 // windows reserved filenames are at least of length 3
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176 if (i - x >= 3) {
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177 boolean found = false;
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178 if (i-x == 3) {
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179 found = windowsReservedFilenames.contains(sb.subSequence(x, i));
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180 } else if (sb.charAt(x+3) == '.') { // implicit i-x > 3
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181 found = windowsReservedFilenames.contains(sb.subSequence(x, x+3));
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182 } else if (i-x > 4 && sb.charAt(x+4) == '.') {
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183 found = windowsReservedFilenames.contains(sb.subSequence(x, x+4));
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184 }
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185 if (found) {
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186 sb.setCharAt(x, '~');
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187 sb.insert(x+1, toHexByte(sb.charAt(x+2), hexByte));
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188 i += 2;
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189 }
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190 }
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191 if (dotencode && (sb.charAt(x) == '.' || sb.charAt(x) == ' ')) {
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192 sb.insert(x+1, toHexByte(sb.charAt(x), hexByte));
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193 sb.setCharAt(x, '~'); // setChar *after* charAt/insert to get ~2e, not ~7e for '.'
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194 i += 2;
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195 }
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196 x = i+1;
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197 } while (x < sb.length());
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198 }
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199 }
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200 final int MAX_PATH_LEN_IN_HGSTORE = 120;
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201 if (fncache && (sb.length() + STR_DATA.length() > MAX_PATH_LEN_IN_HGSTORE)) {
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202 throw HgRepository.notImplemented(); // FIXME digest and fncache use
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203 }
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204 if (this.store) {
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205 sb.insert(0, STR_STORE + STR_DATA);
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206 }
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207 sb.append(".i");
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208 return sb.toString();
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209 }
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210
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211 private static char[] toHexByte(int ch, char[] buf) {
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212 assert buf.length > 1;
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213 final String hexDigits = "0123456789abcdef";
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214 buf[0] = hexDigits.charAt((ch & 0x00F0) >>> 4);
8
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215 buf[1] = hexDigits.charAt(ch & 0x0F);
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216 return buf;
3
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217 }
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218
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219 // TODO handle . and .. (although unlikely to face them from GUI client)
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220 private static String normalize(String path) {
8
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221 path = path.replace('\\', '/').replace("//", "/");
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222 if (path.startsWith("/")) {
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223 path = path.substring(1);
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224 }
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225 return path;
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226 }
1
a3576694a4d1 Repository detection from local/specified directory
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227 }