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@@ -1,953 +1,955 b'' | |||
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1 | 1 | # tags.py - read tag info from local repository |
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2 | 2 | # |
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3 | 3 | # Copyright 2009 Olivia Mackall <olivia@selenic.com> |
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4 | 4 | # Copyright 2009 Greg Ward <greg@gerg.ca> |
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5 | 5 | # |
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6 | 6 | # This software may be used and distributed according to the terms of the |
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7 | 7 | # GNU General Public License version 2 or any later version. |
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8 | 8 | |
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9 | 9 | # Currently this module only deals with reading and caching tags. |
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10 | 10 | # Eventually, it could take care of updating (adding/removing/moving) |
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11 | 11 | # tags too. |
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12 | 12 | |
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13 | 13 | |
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14 | 14 | import binascii |
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15 | 15 | import io |
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16 | 16 | |
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17 | 17 | from .node import ( |
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18 | 18 | bin, |
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19 | 19 | hex, |
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20 | 20 | nullrev, |
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21 | 21 | short, |
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22 | 22 | ) |
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23 | 23 | from .i18n import _ |
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24 | 24 | from . import ( |
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25 | 25 | encoding, |
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26 | 26 | error, |
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27 | 27 | match as matchmod, |
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28 | 28 | scmutil, |
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29 | 29 | util, |
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30 | 30 | ) |
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31 | 31 | from .utils import stringutil |
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32 | 32 | |
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33 | 33 | # Tags computation can be expensive and caches exist to make it fast in |
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34 | 34 | # the common case. |
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35 | 35 | # |
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36 | 36 | # The "hgtagsfnodes1" cache file caches the .hgtags filenode values for |
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37 | 37 | # each revision in the repository. The file is effectively an array of |
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38 | 38 | # fixed length records. Read the docs for "hgtagsfnodescache" for technical |
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39 | 39 | # details. |
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40 | 40 | # |
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41 | 41 | # The .hgtags filenode cache grows in proportion to the length of the |
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42 | 42 | # changelog. The file is truncated when the # changelog is stripped. |
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43 | 43 | # |
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44 | 44 | # The purpose of the filenode cache is to avoid the most expensive part |
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45 | 45 | # of finding global tags, which is looking up the .hgtags filenode in the |
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46 | 46 | # manifest for each head. This can take dozens or over 100ms for |
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47 | 47 | # repositories with very large manifests. Multiplied by dozens or even |
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48 | 48 | # hundreds of heads and there is a significant performance concern. |
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49 | 49 | # |
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50 | 50 | # There also exist a separate cache file for each repository filter. |
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51 | 51 | # These "tags-*" files store information about the history of tags. |
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52 | 52 | # |
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53 | 53 | # The tags cache files consists of a cache validation line followed by |
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54 | 54 | # a history of tags. |
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55 | 55 | # |
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56 | 56 | # The cache validation line has the format: |
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57 | 57 | # |
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58 | 58 | # <tiprev> <tipnode> [<filteredhash>] |
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59 | 59 | # |
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60 | 60 | # <tiprev> is an integer revision and <tipnode> is a 40 character hex |
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61 | 61 | # node for that changeset. These redundantly identify the repository |
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62 | 62 | # tip from the time the cache was written. In addition, <filteredhash>, |
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63 | 63 | # if present, is a 40 character hex hash of the contents of the filtered |
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64 | 64 | # revisions for this filter. If the set of filtered revs changes, the |
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65 | 65 | # hash will change and invalidate the cache. |
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66 | 66 | # |
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67 | 67 | # The history part of the tags cache consists of lines of the form: |
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68 | 68 | # |
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69 | 69 | # <node> <tag> |
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70 | 70 | # |
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71 | 71 | # (This format is identical to that of .hgtags files.) |
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72 | 72 | # |
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73 | 73 | # <tag> is the tag name and <node> is the 40 character hex changeset |
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74 | 74 | # the tag is associated with. |
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75 | 75 | # |
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76 | 76 | # Tags are written sorted by tag name. |
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77 | 77 | # |
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78 | 78 | # Tags associated with multiple changesets have an entry for each changeset. |
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79 | 79 | # The most recent changeset (in terms of revlog ordering for the head |
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80 | 80 | # setting it) for each tag is last. |
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81 | 81 | |
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82 | 82 | |
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83 | 83 | def warm_cache(repo): |
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84 | 84 | """ensure the cache is properly filled""" |
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85 | 85 | unfi = repo.unfiltered() |
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86 |
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86 | tonode = unfi.changelog.node | |
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87 | nodes = [tonode(r) for r in unfi.changelog.revs()] | |
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88 | _getfnodes(repo.ui, repo, nodes) | |
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87 | 89 | |
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88 | 90 | |
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89 | 91 | def fnoderevs(ui, repo, revs): |
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90 | 92 | """return the list of '.hgtags' fnodes used in a set revisions |
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91 | 93 | |
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92 | 94 | This is returned as list of unique fnodes. We use a list instead of a set |
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93 | 95 | because order matters when it comes to tags.""" |
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94 | 96 | unfi = repo.unfiltered() |
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95 | 97 | tonode = unfi.changelog.node |
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96 | 98 | nodes = [tonode(r) for r in revs] |
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97 | 99 | fnodes = _getfnodes(ui, repo, nodes) |
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98 | 100 | fnodes = _filterfnodes(fnodes, nodes) |
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99 | 101 | return fnodes |
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100 | 102 | |
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101 | 103 | |
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102 | 104 | def _nulltonone(repo, value): |
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103 | 105 | """convert nullid to None |
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104 | 106 | |
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105 | 107 | For tag value, nullid means "deleted". This small utility function helps |
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106 | 108 | translating that to None.""" |
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107 | 109 | if value == repo.nullid: |
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108 | 110 | return None |
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109 | 111 | return value |
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110 | 112 | |
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111 | 113 | |
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112 | 114 | def difftags(ui, repo, oldfnodes, newfnodes): |
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113 | 115 | """list differences between tags expressed in two set of file-nodes |
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114 | 116 | |
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115 | 117 | The list contains entries in the form: (tagname, oldvalue, new value). |
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116 | 118 | None is used to expressed missing value: |
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117 | 119 | ('foo', None, 'abcd') is a new tag, |
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118 | 120 | ('bar', 'ef01', None) is a deletion, |
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119 | 121 | ('baz', 'abcd', 'ef01') is a tag movement. |
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120 | 122 | """ |
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121 | 123 | if oldfnodes == newfnodes: |
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122 | 124 | return [] |
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123 | 125 | oldtags = _tagsfromfnodes(ui, repo, oldfnodes) |
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124 | 126 | newtags = _tagsfromfnodes(ui, repo, newfnodes) |
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125 | 127 | |
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126 | 128 | # list of (tag, old, new): None means missing |
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127 | 129 | entries = [] |
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128 | 130 | for tag, (new, __) in newtags.items(): |
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129 | 131 | new = _nulltonone(repo, new) |
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130 | 132 | old, __ = oldtags.pop(tag, (None, None)) |
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131 | 133 | old = _nulltonone(repo, old) |
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132 | 134 | if old != new: |
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133 | 135 | entries.append((tag, old, new)) |
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134 | 136 | # handle deleted tags |
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135 | 137 | for tag, (old, __) in oldtags.items(): |
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136 | 138 | old = _nulltonone(repo, old) |
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137 | 139 | if old is not None: |
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138 | 140 | entries.append((tag, old, None)) |
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139 | 141 | entries.sort() |
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140 | 142 | return entries |
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141 | 143 | |
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142 | 144 | |
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143 | 145 | def writediff(fp, difflist): |
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144 | 146 | """write tags diff information to a file. |
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145 | 147 | |
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146 | 148 | Data are stored with a line based format: |
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147 | 149 | |
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148 | 150 | <action> <hex-node> <tag-name>\n |
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149 | 151 | |
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150 | 152 | Action are defined as follow: |
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151 | 153 | -R tag is removed, |
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152 | 154 | +A tag is added, |
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153 | 155 | -M tag is moved (old value), |
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154 | 156 | +M tag is moved (new value), |
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155 | 157 | |
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156 | 158 | Example: |
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157 | 159 | |
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158 | 160 | +A 875517b4806a848f942811a315a5bce30804ae85 t5 |
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159 | 161 | |
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160 | 162 | See documentation of difftags output for details about the input. |
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161 | 163 | """ |
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162 | 164 | add = b'+A %s %s\n' |
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163 | 165 | remove = b'-R %s %s\n' |
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164 | 166 | updateold = b'-M %s %s\n' |
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165 | 167 | updatenew = b'+M %s %s\n' |
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166 | 168 | for tag, old, new in difflist: |
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167 | 169 | # translate to hex |
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168 | 170 | if old is not None: |
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169 | 171 | old = hex(old) |
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170 | 172 | if new is not None: |
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171 | 173 | new = hex(new) |
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172 | 174 | # write to file |
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173 | 175 | if old is None: |
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174 | 176 | fp.write(add % (new, tag)) |
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175 | 177 | elif new is None: |
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176 | 178 | fp.write(remove % (old, tag)) |
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177 | 179 | else: |
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178 | 180 | fp.write(updateold % (old, tag)) |
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179 | 181 | fp.write(updatenew % (new, tag)) |
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180 | 182 | |
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181 | 183 | |
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182 | 184 | def findglobaltags(ui, repo): |
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183 | 185 | """Find global tags in a repo: return a tagsmap |
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184 | 186 | |
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185 | 187 | tagsmap: tag name to (node, hist) 2-tuples. |
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186 | 188 | |
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187 | 189 | The tags cache is read and updated as a side-effect of calling. |
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188 | 190 | """ |
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189 | 191 | (heads, tagfnode, valid, cachetags, shouldwrite) = _readtagcache(ui, repo) |
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190 | 192 | if cachetags is not None: |
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191 | 193 | assert not shouldwrite |
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192 | 194 | # XXX is this really 100% correct? are there oddball special |
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193 | 195 | # cases where a global tag should outrank a local tag but won't, |
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194 | 196 | # because cachetags does not contain rank info? |
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195 | 197 | alltags = {} |
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196 | 198 | _updatetags(cachetags, alltags) |
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197 | 199 | return alltags |
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198 | 200 | |
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199 | 201 | has_node = repo.changelog.index.has_node |
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200 | 202 | for head in reversed(heads): # oldest to newest |
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201 | 203 | assert has_node(head), b"tag cache returned bogus head %s" % short(head) |
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202 | 204 | fnodes = _filterfnodes(tagfnode, reversed(heads)) |
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203 | 205 | alltags = _tagsfromfnodes(ui, repo, fnodes) |
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204 | 206 | |
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205 | 207 | # and update the cache (if necessary) |
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206 | 208 | if shouldwrite: |
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207 | 209 | _writetagcache(ui, repo, valid, alltags) |
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208 | 210 | return alltags |
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209 | 211 | |
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210 | 212 | |
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211 | 213 | def _filterfnodes(tagfnode, nodes): |
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212 | 214 | """return a list of unique fnodes |
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213 | 215 | |
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214 | 216 | The order of this list matches the order of "nodes". Preserving this order |
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215 | 217 | is important as reading tags in different order provides different |
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216 | 218 | results.""" |
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217 | 219 | seen = set() # set of fnode |
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218 | 220 | fnodes = [] |
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219 | 221 | for no in nodes: # oldest to newest |
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220 | 222 | fnode = tagfnode.get(no) |
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221 | 223 | if fnode and fnode not in seen: |
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222 | 224 | seen.add(fnode) |
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223 | 225 | fnodes.append(fnode) |
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224 | 226 | return fnodes |
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225 | 227 | |
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226 | 228 | |
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227 | 229 | def _tagsfromfnodes(ui, repo, fnodes): |
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228 | 230 | """return a tagsmap from a list of file-node |
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229 | 231 | |
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230 | 232 | tagsmap: tag name to (node, hist) 2-tuples. |
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231 | 233 | |
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232 | 234 | The order of the list matters.""" |
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233 | 235 | alltags = {} |
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234 | 236 | fctx = None |
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235 | 237 | for fnode in fnodes: |
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236 | 238 | if fctx is None: |
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237 | 239 | fctx = repo.filectx(b'.hgtags', fileid=fnode) |
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238 | 240 | else: |
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239 | 241 | fctx = fctx.filectx(fnode) |
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240 | 242 | filetags = _readtags(ui, repo, fctx.data().splitlines(), fctx) |
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241 | 243 | _updatetags(filetags, alltags) |
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242 | 244 | return alltags |
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243 | 245 | |
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244 | 246 | |
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245 | 247 | def readlocaltags(ui, repo, alltags, tagtypes): |
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246 | 248 | '''Read local tags in repo. Update alltags and tagtypes.''' |
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247 | 249 | try: |
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248 | 250 | data = repo.vfs.read(b"localtags") |
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249 | 251 | except FileNotFoundError: |
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250 | 252 | return |
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251 | 253 | |
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252 | 254 | # localtags is in the local encoding; re-encode to UTF-8 on |
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253 | 255 | # input for consistency with the rest of this module. |
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254 | 256 | filetags = _readtags( |
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255 | 257 | ui, repo, data.splitlines(), b"localtags", recode=encoding.fromlocal |
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256 | 258 | ) |
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257 | 259 | |
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258 | 260 | # remove tags pointing to invalid nodes |
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259 | 261 | cl = repo.changelog |
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260 | 262 | for t in list(filetags): |
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261 | 263 | try: |
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262 | 264 | cl.rev(filetags[t][0]) |
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263 | 265 | except (LookupError, ValueError): |
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264 | 266 | del filetags[t] |
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265 | 267 | |
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266 | 268 | _updatetags(filetags, alltags, b'local', tagtypes) |
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267 | 269 | |
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268 | 270 | |
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269 | 271 | def _readtaghist(ui, repo, lines, fn, recode=None, calcnodelines=False): |
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270 | 272 | """Read tag definitions from a file (or any source of lines). |
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271 | 273 | |
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272 | 274 | This function returns two sortdicts with similar information: |
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273 | 275 | |
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274 | 276 | - the first dict, bintaghist, contains the tag information as expected by |
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275 | 277 | the _readtags function, i.e. a mapping from tag name to (node, hist): |
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276 | 278 | - node is the node id from the last line read for that name, |
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277 | 279 | - hist is the list of node ids previously associated with it (in file |
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278 | 280 | order). All node ids are binary, not hex. |
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279 | 281 | |
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280 | 282 | - the second dict, hextaglines, is a mapping from tag name to a list of |
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281 | 283 | [hexnode, line number] pairs, ordered from the oldest to the newest node. |
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282 | 284 | |
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283 | 285 | When calcnodelines is False the hextaglines dict is not calculated (an |
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284 | 286 | empty dict is returned). This is done to improve this function's |
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285 | 287 | performance in cases where the line numbers are not needed. |
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286 | 288 | """ |
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287 | 289 | |
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288 | 290 | bintaghist = util.sortdict() |
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289 | 291 | hextaglines = util.sortdict() |
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290 | 292 | count = 0 |
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291 | 293 | |
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292 | 294 | def dbg(msg): |
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293 | 295 | ui.debug(b"%s, line %d: %s\n" % (fn, count, msg)) |
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294 | 296 | |
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295 | 297 | for nline, line in enumerate(lines): |
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296 | 298 | count += 1 |
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297 | 299 | if not line: |
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298 | 300 | continue |
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299 | 301 | try: |
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300 | 302 | (nodehex, name) = line.split(b" ", 1) |
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301 | 303 | except ValueError: |
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302 | 304 | dbg(b"cannot parse entry") |
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303 | 305 | continue |
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304 | 306 | name = name.strip() |
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305 | 307 | if recode: |
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306 | 308 | name = recode(name) |
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307 | 309 | try: |
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308 | 310 | nodebin = bin(nodehex) |
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309 | 311 | except binascii.Error: |
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310 | 312 | dbg(b"node '%s' is not well formed" % nodehex) |
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311 | 313 | continue |
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312 | 314 | |
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313 | 315 | # update filetags |
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314 | 316 | if calcnodelines: |
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315 | 317 | # map tag name to a list of line numbers |
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316 | 318 | if name not in hextaglines: |
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317 | 319 | hextaglines[name] = [] |
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318 | 320 | hextaglines[name].append([nodehex, nline]) |
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319 | 321 | continue |
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320 | 322 | # map tag name to (node, hist) |
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321 | 323 | if name not in bintaghist: |
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322 | 324 | bintaghist[name] = [] |
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323 | 325 | bintaghist[name].append(nodebin) |
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324 | 326 | return bintaghist, hextaglines |
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325 | 327 | |
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326 | 328 | |
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327 | 329 | def _readtags(ui, repo, lines, fn, recode=None, calcnodelines=False): |
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328 | 330 | """Read tag definitions from a file (or any source of lines). |
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329 | 331 | |
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330 | 332 | Returns a mapping from tag name to (node, hist). |
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331 | 333 | |
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332 | 334 | "node" is the node id from the last line read for that name. "hist" |
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333 | 335 | is the list of node ids previously associated with it (in file order). |
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334 | 336 | All node ids are binary, not hex. |
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335 | 337 | """ |
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336 | 338 | filetags, nodelines = _readtaghist( |
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337 | 339 | ui, repo, lines, fn, recode=recode, calcnodelines=calcnodelines |
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338 | 340 | ) |
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339 | 341 | # util.sortdict().__setitem__ is much slower at replacing then inserting |
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340 | 342 | # new entries. The difference can matter if there are thousands of tags. |
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341 | 343 | # Create a new sortdict to avoid the performance penalty. |
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342 | 344 | newtags = util.sortdict() |
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343 | 345 | for tag, taghist in filetags.items(): |
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344 | 346 | newtags[tag] = (taghist[-1], taghist[:-1]) |
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345 | 347 | return newtags |
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346 | 348 | |
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347 | 349 | |
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348 | 350 | def _updatetags(filetags, alltags, tagtype=None, tagtypes=None): |
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349 | 351 | """Incorporate the tag info read from one file into dictionnaries |
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350 | 352 | |
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351 | 353 | The first one, 'alltags', is a "tagmaps" (see 'findglobaltags' for details). |
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352 | 354 | |
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353 | 355 | The second one, 'tagtypes', is optional and will be updated to track the |
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354 | 356 | "tagtype" of entries in the tagmaps. When set, the 'tagtype' argument also |
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355 | 357 | needs to be set.""" |
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356 | 358 | if tagtype is None: |
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357 | 359 | assert tagtypes is None |
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358 | 360 | |
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359 | 361 | for name, nodehist in filetags.items(): |
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360 | 362 | if name not in alltags: |
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361 | 363 | alltags[name] = nodehist |
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362 | 364 | if tagtype is not None: |
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363 | 365 | tagtypes[name] = tagtype |
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364 | 366 | continue |
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365 | 367 | |
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366 | 368 | # we prefer alltags[name] if: |
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367 | 369 | # it supersedes us OR |
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368 | 370 | # mutual supersedes and it has a higher rank |
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369 | 371 | # otherwise we win because we're tip-most |
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370 | 372 | anode, ahist = nodehist |
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371 | 373 | bnode, bhist = alltags[name] |
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372 | 374 | if ( |
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373 | 375 | bnode != anode |
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374 | 376 | and anode in bhist |
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375 | 377 | and (bnode not in ahist or len(bhist) > len(ahist)) |
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376 | 378 | ): |
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377 | 379 | anode = bnode |
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378 | 380 | elif tagtype is not None: |
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379 | 381 | tagtypes[name] = tagtype |
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380 | 382 | ahist.extend([n for n in bhist if n not in ahist]) |
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381 | 383 | alltags[name] = anode, ahist |
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382 | 384 | |
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383 | 385 | |
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384 | 386 | def _filename(repo): |
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385 | 387 | """name of a tagcache file for a given repo or repoview""" |
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386 | 388 | filename = b'tags2' |
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387 | 389 | if repo.filtername: |
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388 | 390 | filename = b'%s-%s' % (filename, repo.filtername) |
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389 | 391 | return filename |
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390 | 392 | |
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391 | 393 | |
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392 | 394 | def _readtagcache(ui, repo): |
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393 | 395 | """Read the tag cache. |
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394 | 396 | |
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395 | 397 | Returns a tuple (heads, fnodes, validinfo, cachetags, shouldwrite). |
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396 | 398 | |
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397 | 399 | If the cache is completely up-to-date, "cachetags" is a dict of the |
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398 | 400 | form returned by _readtags() and "heads", "fnodes", and "validinfo" are |
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399 | 401 | None and "shouldwrite" is False. |
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400 | 402 | |
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401 | 403 | If the cache is not up to date, "cachetags" is None. "heads" is a list |
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402 | 404 | of all heads currently in the repository, ordered from tip to oldest. |
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403 | 405 | "validinfo" is a tuple describing cache validation info. This is used |
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404 | 406 | when writing the tags cache. "fnodes" is a mapping from head to .hgtags |
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405 | 407 | filenode. "shouldwrite" is True. |
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406 | 408 | |
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407 | 409 | If the cache is not up to date, the caller is responsible for reading tag |
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408 | 410 | info from each returned head. (See findglobaltags().) |
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409 | 411 | """ |
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410 | 412 | try: |
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411 | 413 | cachefile = repo.cachevfs(_filename(repo), b'r') |
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412 | 414 | # force reading the file for static-http |
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413 | 415 | cachelines = iter(cachefile) |
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414 | 416 | except IOError: |
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415 | 417 | cachefile = None |
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416 | 418 | |
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417 | 419 | cacherev = None |
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418 | 420 | cachenode = None |
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419 | 421 | cachehash = None |
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420 | 422 | if cachefile: |
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421 | 423 | try: |
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422 | 424 | validline = next(cachelines) |
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423 | 425 | validline = validline.split() |
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424 | 426 | cacherev = int(validline[0]) |
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425 | 427 | cachenode = bin(validline[1]) |
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426 | 428 | if len(validline) > 2: |
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427 | 429 | cachehash = bin(validline[2]) |
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428 | 430 | except Exception: |
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429 | 431 | # corruption of the cache, just recompute it. |
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430 | 432 | pass |
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431 | 433 | |
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432 | 434 | tipnode = repo.changelog.tip() |
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433 | 435 | tiprev = len(repo.changelog) - 1 |
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434 | 436 | |
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435 | 437 | # Case 1 (common): tip is the same, so nothing has changed. |
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436 | 438 | # (Unchanged tip trivially means no changesets have been added. |
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437 | 439 | # But, thanks to localrepository.destroyed(), it also means none |
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438 | 440 | # have been destroyed by strip or rollback.) |
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439 | 441 | if ( |
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440 | 442 | cacherev == tiprev |
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441 | 443 | and cachenode == tipnode |
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442 | 444 | and cachehash |
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443 | 445 | == scmutil.combined_filtered_and_obsolete_hash( |
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444 | 446 | repo, |
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445 | 447 | tiprev, |
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446 | 448 | ) |
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447 | 449 | ): |
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448 | 450 | tags = _readtags(ui, repo, cachelines, cachefile.name) |
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449 | 451 | cachefile.close() |
|
450 | 452 | return (None, None, None, tags, False) |
|
451 | 453 | if cachefile: |
|
452 | 454 | cachefile.close() # ignore rest of file |
|
453 | 455 | |
|
454 | 456 | valid = ( |
|
455 | 457 | tiprev, |
|
456 | 458 | tipnode, |
|
457 | 459 | scmutil.combined_filtered_and_obsolete_hash( |
|
458 | 460 | repo, |
|
459 | 461 | tiprev, |
|
460 | 462 | ), |
|
461 | 463 | ) |
|
462 | 464 | |
|
463 | 465 | repoheads = repo.heads() |
|
464 | 466 | # Case 2 (uncommon): empty repo; get out quickly and don't bother |
|
465 | 467 | # writing an empty cache. |
|
466 | 468 | if repoheads == [repo.nullid]: |
|
467 | 469 | return ([], {}, valid, {}, False) |
|
468 | 470 | |
|
469 | 471 | # Case 3 (uncommon): cache file missing or empty. |
|
470 | 472 | |
|
471 | 473 | # Case 4 (uncommon): tip rev decreased. This should only happen |
|
472 | 474 | # when we're called from localrepository.destroyed(). Refresh the |
|
473 | 475 | # cache so future invocations will not see disappeared heads in the |
|
474 | 476 | # cache. |
|
475 | 477 | |
|
476 | 478 | # Case 5 (common): tip has changed, so we've added/replaced heads. |
|
477 | 479 | |
|
478 | 480 | # As it happens, the code to handle cases 3, 4, 5 is the same. |
|
479 | 481 | |
|
480 | 482 | # N.B. in case 4 (nodes destroyed), "new head" really means "newly |
|
481 | 483 | # exposed". |
|
482 | 484 | if not len(repo.file(b'.hgtags')): |
|
483 | 485 | # No tags have ever been committed, so we can avoid a |
|
484 | 486 | # potentially expensive search. |
|
485 | 487 | return ([], {}, valid, None, True) |
|
486 | 488 | |
|
487 | 489 | # Now we have to lookup the .hgtags filenode for every new head. |
|
488 | 490 | # This is the most expensive part of finding tags, so performance |
|
489 | 491 | # depends primarily on the size of newheads. Worst case: no cache |
|
490 | 492 | # file, so newheads == repoheads. |
|
491 | 493 | # Reversed order helps the cache ('repoheads' is in descending order) |
|
492 | 494 | cachefnode = _getfnodes(ui, repo, reversed(repoheads)) |
|
493 | 495 | |
|
494 | 496 | # Caller has to iterate over all heads, but can use the filenodes in |
|
495 | 497 | # cachefnode to get to each .hgtags revision quickly. |
|
496 | 498 | return (repoheads, cachefnode, valid, None, True) |
|
497 | 499 | |
|
498 | 500 | |
|
499 | 501 | def _getfnodes(ui, repo, nodes): |
|
500 | 502 | """return .hgtags fnodes for a list of changeset nodes |
|
501 | 503 | |
|
502 | 504 | Return value is a {node: fnode} mapping. There will be no entry for nodes |
|
503 | 505 | without a '.hgtags' file. |
|
504 | 506 | """ |
|
505 | 507 | starttime = util.timer() |
|
506 | 508 | fnodescache = hgtagsfnodescache(repo.unfiltered()) |
|
507 | 509 | cachefnode = {} |
|
508 | 510 | validated_fnodes = set() |
|
509 | 511 | unknown_entries = set() |
|
510 | 512 | |
|
511 | 513 | flog = None |
|
512 | 514 | for node in nodes: |
|
513 | 515 | fnode = fnodescache.getfnode(node) |
|
514 | 516 | if fnode != repo.nullid: |
|
515 | 517 | if fnode not in validated_fnodes: |
|
516 | 518 | if flog is None: |
|
517 | 519 | flog = repo.file(b'.hgtags') |
|
518 | 520 | if flog.hasnode(fnode): |
|
519 | 521 | validated_fnodes.add(fnode) |
|
520 | 522 | else: |
|
521 | 523 | unknown_entries.add(node) |
|
522 | 524 | cachefnode[node] = fnode |
|
523 | 525 | |
|
524 | 526 | if unknown_entries: |
|
525 | 527 | fixed_nodemap = fnodescache.refresh_invalid_nodes(unknown_entries) |
|
526 | 528 | for node, fnode in fixed_nodemap.items(): |
|
527 | 529 | if fnode != repo.nullid: |
|
528 | 530 | cachefnode[node] = fnode |
|
529 | 531 | |
|
530 | 532 | fnodescache.write() |
|
531 | 533 | |
|
532 | 534 | duration = util.timer() - starttime |
|
533 | 535 | ui.log( |
|
534 | 536 | b'tagscache', |
|
535 | 537 | b'%d/%d cache hits/lookups in %0.4f seconds\n', |
|
536 | 538 | fnodescache.hitcount, |
|
537 | 539 | fnodescache.lookupcount, |
|
538 | 540 | duration, |
|
539 | 541 | ) |
|
540 | 542 | return cachefnode |
|
541 | 543 | |
|
542 | 544 | |
|
543 | 545 | def _writetagcache(ui, repo, valid, cachetags): |
|
544 | 546 | filename = _filename(repo) |
|
545 | 547 | try: |
|
546 | 548 | cachefile = repo.cachevfs(filename, b'w', atomictemp=True) |
|
547 | 549 | except (OSError, IOError): |
|
548 | 550 | return |
|
549 | 551 | |
|
550 | 552 | ui.log( |
|
551 | 553 | b'tagscache', |
|
552 | 554 | b'writing .hg/cache/%s with %d tags\n', |
|
553 | 555 | filename, |
|
554 | 556 | len(cachetags), |
|
555 | 557 | ) |
|
556 | 558 | |
|
557 | 559 | if valid[2]: |
|
558 | 560 | cachefile.write( |
|
559 | 561 | b'%d %s %s\n' % (valid[0], hex(valid[1]), hex(valid[2])) |
|
560 | 562 | ) |
|
561 | 563 | else: |
|
562 | 564 | cachefile.write(b'%d %s\n' % (valid[0], hex(valid[1]))) |
|
563 | 565 | |
|
564 | 566 | # Tag names in the cache are in UTF-8 -- which is the whole reason |
|
565 | 567 | # we keep them in UTF-8 throughout this module. If we converted |
|
566 | 568 | # them local encoding on input, we would lose info writing them to |
|
567 | 569 | # the cache. |
|
568 | 570 | for (name, (node, hist)) in sorted(cachetags.items()): |
|
569 | 571 | for n in hist: |
|
570 | 572 | cachefile.write(b"%s %s\n" % (hex(n), name)) |
|
571 | 573 | cachefile.write(b"%s %s\n" % (hex(node), name)) |
|
572 | 574 | |
|
573 | 575 | try: |
|
574 | 576 | cachefile.close() |
|
575 | 577 | except (OSError, IOError): |
|
576 | 578 | pass |
|
577 | 579 | |
|
578 | 580 | |
|
579 | 581 | def tag(repo, names, node, message, local, user, date, editor=False): |
|
580 | 582 | """tag a revision with one or more symbolic names. |
|
581 | 583 | |
|
582 | 584 | names is a list of strings or, when adding a single tag, names may be a |
|
583 | 585 | string. |
|
584 | 586 | |
|
585 | 587 | if local is True, the tags are stored in a per-repository file. |
|
586 | 588 | otherwise, they are stored in the .hgtags file, and a new |
|
587 | 589 | changeset is committed with the change. |
|
588 | 590 | |
|
589 | 591 | keyword arguments: |
|
590 | 592 | |
|
591 | 593 | local: whether to store tags in non-version-controlled file |
|
592 | 594 | (default False) |
|
593 | 595 | |
|
594 | 596 | message: commit message to use if committing |
|
595 | 597 | |
|
596 | 598 | user: name of user to use if committing |
|
597 | 599 | |
|
598 | 600 | date: date tuple to use if committing""" |
|
599 | 601 | |
|
600 | 602 | if not local: |
|
601 | 603 | m = matchmod.exact([b'.hgtags']) |
|
602 | 604 | st = repo.status(match=m, unknown=True, ignored=True) |
|
603 | 605 | if any( |
|
604 | 606 | ( |
|
605 | 607 | st.modified, |
|
606 | 608 | st.added, |
|
607 | 609 | st.removed, |
|
608 | 610 | st.deleted, |
|
609 | 611 | st.unknown, |
|
610 | 612 | st.ignored, |
|
611 | 613 | ) |
|
612 | 614 | ): |
|
613 | 615 | raise error.Abort( |
|
614 | 616 | _(b'working copy of .hgtags is changed'), |
|
615 | 617 | hint=_(b'please commit .hgtags manually'), |
|
616 | 618 | ) |
|
617 | 619 | |
|
618 | 620 | with repo.wlock(): |
|
619 | 621 | repo.tags() # instantiate the cache |
|
620 | 622 | _tag(repo, names, node, message, local, user, date, editor=editor) |
|
621 | 623 | |
|
622 | 624 | |
|
623 | 625 | def _tag( |
|
624 | 626 | repo, names, node, message, local, user, date, extra=None, editor=False |
|
625 | 627 | ): |
|
626 | 628 | if isinstance(names, bytes): |
|
627 | 629 | names = (names,) |
|
628 | 630 | |
|
629 | 631 | branches = repo.branchmap() |
|
630 | 632 | for name in names: |
|
631 | 633 | repo.hook(b'pretag', throw=True, node=hex(node), tag=name, local=local) |
|
632 | 634 | if name in branches: |
|
633 | 635 | repo.ui.warn( |
|
634 | 636 | _(b"warning: tag %s conflicts with existing branch name\n") |
|
635 | 637 | % name |
|
636 | 638 | ) |
|
637 | 639 | |
|
638 | 640 | def writetags(fp, names, munge, prevtags): |
|
639 | 641 | fp.seek(0, io.SEEK_END) |
|
640 | 642 | if prevtags and not prevtags.endswith(b'\n'): |
|
641 | 643 | fp.write(b'\n') |
|
642 | 644 | for name in names: |
|
643 | 645 | if munge: |
|
644 | 646 | m = munge(name) |
|
645 | 647 | else: |
|
646 | 648 | m = name |
|
647 | 649 | |
|
648 | 650 | if repo._tagscache.tagtypes and name in repo._tagscache.tagtypes: |
|
649 | 651 | old = repo.tags().get(name, repo.nullid) |
|
650 | 652 | fp.write(b'%s %s\n' % (hex(old), m)) |
|
651 | 653 | fp.write(b'%s %s\n' % (hex(node), m)) |
|
652 | 654 | fp.close() |
|
653 | 655 | |
|
654 | 656 | prevtags = b'' |
|
655 | 657 | if local: |
|
656 | 658 | try: |
|
657 | 659 | fp = repo.vfs(b'localtags', b'r+') |
|
658 | 660 | except IOError: |
|
659 | 661 | fp = repo.vfs(b'localtags', b'a') |
|
660 | 662 | else: |
|
661 | 663 | prevtags = fp.read() |
|
662 | 664 | |
|
663 | 665 | # local tags are stored in the current charset |
|
664 | 666 | writetags(fp, names, None, prevtags) |
|
665 | 667 | for name in names: |
|
666 | 668 | repo.hook(b'tag', node=hex(node), tag=name, local=local) |
|
667 | 669 | return |
|
668 | 670 | |
|
669 | 671 | try: |
|
670 | 672 | fp = repo.wvfs(b'.hgtags', b'rb+') |
|
671 | 673 | except FileNotFoundError: |
|
672 | 674 | fp = repo.wvfs(b'.hgtags', b'ab') |
|
673 | 675 | else: |
|
674 | 676 | prevtags = fp.read() |
|
675 | 677 | |
|
676 | 678 | # committed tags are stored in UTF-8 |
|
677 | 679 | writetags(fp, names, encoding.fromlocal, prevtags) |
|
678 | 680 | |
|
679 | 681 | fp.close() |
|
680 | 682 | |
|
681 | 683 | repo.invalidatecaches() |
|
682 | 684 | |
|
683 | 685 | with repo.dirstate.changing_files(repo): |
|
684 | 686 | if b'.hgtags' not in repo.dirstate: |
|
685 | 687 | repo[None].add([b'.hgtags']) |
|
686 | 688 | |
|
687 | 689 | m = matchmod.exact([b'.hgtags']) |
|
688 | 690 | tagnode = repo.commit( |
|
689 | 691 | message, user, date, extra=extra, match=m, editor=editor |
|
690 | 692 | ) |
|
691 | 693 | |
|
692 | 694 | for name in names: |
|
693 | 695 | repo.hook(b'tag', node=hex(node), tag=name, local=local) |
|
694 | 696 | |
|
695 | 697 | return tagnode |
|
696 | 698 | |
|
697 | 699 | |
|
698 | 700 | _fnodescachefile = b'hgtagsfnodes1' |
|
699 | 701 | _fnodesrecsize = 4 + 20 # changeset fragment + filenode |
|
700 | 702 | _fnodesmissingrec = b'\xff' * 24 |
|
701 | 703 | |
|
702 | 704 | |
|
703 | 705 | class hgtagsfnodescache: |
|
704 | 706 | """Persistent cache mapping revisions to .hgtags filenodes. |
|
705 | 707 | |
|
706 | 708 | The cache is an array of records. Each item in the array corresponds to |
|
707 | 709 | a changelog revision. Values in the array contain the first 4 bytes of |
|
708 | 710 | the node hash and the 20 bytes .hgtags filenode for that revision. |
|
709 | 711 | |
|
710 | 712 | The first 4 bytes are present as a form of verification. Repository |
|
711 | 713 | stripping and rewriting may change the node at a numeric revision in the |
|
712 | 714 | changelog. The changeset fragment serves as a verifier to detect |
|
713 | 715 | rewriting. This logic is shared with the rev branch cache (see |
|
714 | 716 | branchmap.py). |
|
715 | 717 | |
|
716 | 718 | The instance holds in memory the full cache content but entries are |
|
717 | 719 | only parsed on read. |
|
718 | 720 | |
|
719 | 721 | Instances behave like lists. ``c[i]`` works where i is a rev or |
|
720 | 722 | changeset node. Missing indexes are populated automatically on access. |
|
721 | 723 | """ |
|
722 | 724 | |
|
723 | 725 | def __init__(self, repo): |
|
724 | 726 | assert repo.filtername is None |
|
725 | 727 | |
|
726 | 728 | self._repo = repo |
|
727 | 729 | |
|
728 | 730 | # Only for reporting purposes. |
|
729 | 731 | self.lookupcount = 0 |
|
730 | 732 | self.hitcount = 0 |
|
731 | 733 | |
|
732 | 734 | try: |
|
733 | 735 | data = repo.cachevfs.read(_fnodescachefile) |
|
734 | 736 | except (OSError, IOError): |
|
735 | 737 | data = b"" |
|
736 | 738 | self._raw = bytearray(data) |
|
737 | 739 | |
|
738 | 740 | # The end state of self._raw is an array that is of the exact length |
|
739 | 741 | # required to hold a record for every revision in the repository. |
|
740 | 742 | # We truncate or extend the array as necessary. self._dirtyoffset is |
|
741 | 743 | # defined to be the start offset at which we need to write the output |
|
742 | 744 | # file. This offset is also adjusted when new entries are calculated |
|
743 | 745 | # for array members. |
|
744 | 746 | cllen = len(repo.changelog) |
|
745 | 747 | wantedlen = cllen * _fnodesrecsize |
|
746 | 748 | rawlen = len(self._raw) |
|
747 | 749 | |
|
748 | 750 | self._dirtyoffset = None |
|
749 | 751 | |
|
750 | 752 | rawlentokeep = min( |
|
751 | 753 | wantedlen, (rawlen // _fnodesrecsize) * _fnodesrecsize |
|
752 | 754 | ) |
|
753 | 755 | if rawlen > rawlentokeep: |
|
754 | 756 | # There's no easy way to truncate array instances. This seems |
|
755 | 757 | # slightly less evil than copying a potentially large array slice. |
|
756 | 758 | for i in range(rawlen - rawlentokeep): |
|
757 | 759 | self._raw.pop() |
|
758 | 760 | rawlen = len(self._raw) |
|
759 | 761 | self._dirtyoffset = rawlen |
|
760 | 762 | if rawlen < wantedlen: |
|
761 | 763 | if self._dirtyoffset is None: |
|
762 | 764 | self._dirtyoffset = rawlen |
|
763 | 765 | # TODO: zero fill entire record, because it's invalid not missing? |
|
764 | 766 | self._raw.extend(b'\xff' * (wantedlen - rawlen)) |
|
765 | 767 | |
|
766 | 768 | def getfnode(self, node, computemissing=True): |
|
767 | 769 | """Obtain the filenode of the .hgtags file at a specified revision. |
|
768 | 770 | |
|
769 | 771 | If the value is in the cache, the entry will be validated and returned. |
|
770 | 772 | Otherwise, the filenode will be computed and returned unless |
|
771 | 773 | "computemissing" is False. In that case, None will be returned if |
|
772 | 774 | the entry is missing or False if the entry is invalid without |
|
773 | 775 | any potentially expensive computation being performed. |
|
774 | 776 | |
|
775 | 777 | If an .hgtags does not exist at the specified revision, nullid is |
|
776 | 778 | returned. |
|
777 | 779 | """ |
|
778 | 780 | if node == self._repo.nullid: |
|
779 | 781 | return node |
|
780 | 782 | |
|
781 | 783 | rev = self._repo.changelog.rev(node) |
|
782 | 784 | |
|
783 | 785 | self.lookupcount += 1 |
|
784 | 786 | |
|
785 | 787 | offset = rev * _fnodesrecsize |
|
786 | 788 | record = b'%s' % self._raw[offset : offset + _fnodesrecsize] |
|
787 | 789 | properprefix = node[0:4] |
|
788 | 790 | |
|
789 | 791 | # Validate and return existing entry. |
|
790 | 792 | if record != _fnodesmissingrec and len(record) == _fnodesrecsize: |
|
791 | 793 | fileprefix = record[0:4] |
|
792 | 794 | |
|
793 | 795 | if fileprefix == properprefix: |
|
794 | 796 | self.hitcount += 1 |
|
795 | 797 | return record[4:] |
|
796 | 798 | |
|
797 | 799 | # Fall through. |
|
798 | 800 | |
|
799 | 801 | # If we get here, the entry is either missing or invalid. |
|
800 | 802 | |
|
801 | 803 | if not computemissing: |
|
802 | 804 | if record != _fnodesmissingrec: |
|
803 | 805 | return False |
|
804 | 806 | return None |
|
805 | 807 | |
|
806 | 808 | fnode = self._computefnode(node) |
|
807 | 809 | self._writeentry(offset, properprefix, fnode) |
|
808 | 810 | return fnode |
|
809 | 811 | |
|
810 | 812 | def _computefnode(self, node): |
|
811 | 813 | """Finds the tag filenode for a node which is missing or invalid |
|
812 | 814 | in cache""" |
|
813 | 815 | ctx = self._repo[node] |
|
814 | 816 | rev = ctx.rev() |
|
815 | 817 | fnode = None |
|
816 | 818 | cl = self._repo.changelog |
|
817 | 819 | p1rev, p2rev = cl._uncheckedparentrevs(rev) |
|
818 | 820 | p1node = cl.node(p1rev) |
|
819 | 821 | p1fnode = self.getfnode(p1node, computemissing=False) |
|
820 | 822 | if p2rev != nullrev: |
|
821 | 823 | # There is some no-merge changeset where p1 is null and p2 is set |
|
822 | 824 | # Processing them as merge is just slower, but still gives a good |
|
823 | 825 | # result. |
|
824 | 826 | p2node = cl.node(p2rev) |
|
825 | 827 | p2fnode = self.getfnode(p2node, computemissing=False) |
|
826 | 828 | if p1fnode != p2fnode: |
|
827 | 829 | # we cannot rely on readfast because we don't know against what |
|
828 | 830 | # parent the readfast delta is computed |
|
829 | 831 | p1fnode = None |
|
830 | 832 | if p1fnode: |
|
831 | 833 | mctx = ctx.manifestctx() |
|
832 | 834 | fnode = mctx.readfast().get(b'.hgtags') |
|
833 | 835 | if fnode is None: |
|
834 | 836 | fnode = p1fnode |
|
835 | 837 | if fnode is None: |
|
836 | 838 | # Populate missing entry. |
|
837 | 839 | try: |
|
838 | 840 | fnode = ctx.filenode(b'.hgtags') |
|
839 | 841 | except error.LookupError: |
|
840 | 842 | # No .hgtags file on this revision. |
|
841 | 843 | fnode = self._repo.nullid |
|
842 | 844 | return fnode |
|
843 | 845 | |
|
844 | 846 | def setfnode(self, node, fnode): |
|
845 | 847 | """Set the .hgtags filenode for a given changeset.""" |
|
846 | 848 | assert len(fnode) == 20 |
|
847 | 849 | ctx = self._repo[node] |
|
848 | 850 | |
|
849 | 851 | # Do a lookup first to avoid writing if nothing has changed. |
|
850 | 852 | if self.getfnode(ctx.node(), computemissing=False) == fnode: |
|
851 | 853 | return |
|
852 | 854 | |
|
853 | 855 | self._writeentry(ctx.rev() * _fnodesrecsize, node[0:4], fnode) |
|
854 | 856 | |
|
855 | 857 | def refresh_invalid_nodes(self, nodes): |
|
856 | 858 | """recomputes file nodes for a given set of nodes which has unknown |
|
857 | 859 | filenodes for them in the cache |
|
858 | 860 | Also updates the in-memory cache with the correct filenode. |
|
859 | 861 | Caller needs to take care about calling `.write()` so that updates are |
|
860 | 862 | persisted. |
|
861 | 863 | Returns a map {node: recomputed fnode} |
|
862 | 864 | """ |
|
863 | 865 | fixed_nodemap = {} |
|
864 | 866 | for node in nodes: |
|
865 | 867 | fnode = self._computefnode(node) |
|
866 | 868 | fixed_nodemap[node] = fnode |
|
867 | 869 | self.setfnode(node, fnode) |
|
868 | 870 | return fixed_nodemap |
|
869 | 871 | |
|
870 | 872 | def _writeentry(self, offset, prefix, fnode): |
|
871 | 873 | # Slices on array instances only accept other array. |
|
872 | 874 | entry = bytearray(prefix + fnode) |
|
873 | 875 | self._raw[offset : offset + _fnodesrecsize] = entry |
|
874 | 876 | # self._dirtyoffset could be None. |
|
875 | 877 | self._dirtyoffset = min(self._dirtyoffset or 0, offset or 0) |
|
876 | 878 | |
|
877 | 879 | def write(self): |
|
878 | 880 | """Perform all necessary writes to cache file. |
|
879 | 881 | |
|
880 | 882 | This may no-op if no writes are needed or if a write lock could |
|
881 | 883 | not be obtained. |
|
882 | 884 | """ |
|
883 | 885 | if self._dirtyoffset is None: |
|
884 | 886 | return |
|
885 | 887 | |
|
886 | 888 | data = self._raw[self._dirtyoffset :] |
|
887 | 889 | if not data: |
|
888 | 890 | return |
|
889 | 891 | |
|
890 | 892 | repo = self._repo |
|
891 | 893 | |
|
892 | 894 | try: |
|
893 | 895 | lock = repo.lock(wait=False) |
|
894 | 896 | except error.LockError: |
|
895 | 897 | repo.ui.log( |
|
896 | 898 | b'tagscache', |
|
897 | 899 | b'not writing .hg/cache/%s because ' |
|
898 | 900 | b'lock cannot be acquired\n' % _fnodescachefile, |
|
899 | 901 | ) |
|
900 | 902 | return |
|
901 | 903 | |
|
902 | 904 | try: |
|
903 | 905 | f = repo.cachevfs.open(_fnodescachefile, b'ab') |
|
904 | 906 | try: |
|
905 | 907 | # if the file has been truncated |
|
906 | 908 | actualoffset = f.tell() |
|
907 | 909 | if actualoffset < self._dirtyoffset: |
|
908 | 910 | self._dirtyoffset = actualoffset |
|
909 | 911 | data = self._raw[self._dirtyoffset :] |
|
910 | 912 | f.seek(self._dirtyoffset) |
|
911 | 913 | f.truncate() |
|
912 | 914 | repo.ui.log( |
|
913 | 915 | b'tagscache', |
|
914 | 916 | b'writing %d bytes to cache/%s\n' |
|
915 | 917 | % (len(data), _fnodescachefile), |
|
916 | 918 | ) |
|
917 | 919 | f.write(data) |
|
918 | 920 | self._dirtyoffset = None |
|
919 | 921 | finally: |
|
920 | 922 | f.close() |
|
921 | 923 | except (IOError, OSError) as inst: |
|
922 | 924 | repo.ui.log( |
|
923 | 925 | b'tagscache', |
|
924 | 926 | b"couldn't write cache/%s: %s\n" |
|
925 | 927 | % (_fnodescachefile, stringutil.forcebytestr(inst)), |
|
926 | 928 | ) |
|
927 | 929 | finally: |
|
928 | 930 | lock.release() |
|
929 | 931 | |
|
930 | 932 | |
|
931 | 933 | def clear_cache_on_disk(repo): |
|
932 | 934 | """function used by the perf extension to "tags" cache""" |
|
933 | 935 | repo.cachevfs.tryunlink(_filename(repo)) |
|
934 | 936 | |
|
935 | 937 | |
|
936 | 938 | # a small attribute to help `hg perf::tags` to detect a fixed version. |
|
937 | 939 | clear_cache_fnodes_is_working = True |
|
938 | 940 | |
|
939 | 941 | |
|
940 | 942 | def clear_cache_fnodes(repo): |
|
941 | 943 | """function used by the perf extension to clear "file node cache""" |
|
942 | 944 | repo.cachevfs.tryunlink(_fnodescachefile) |
|
943 | 945 | |
|
944 | 946 | |
|
945 | 947 | def forget_fnodes(repo, revs): |
|
946 | 948 | """function used by the perf extension to prune some entries from the fnodes |
|
947 | 949 | cache""" |
|
948 | 950 | missing_1 = b'\xff' * 4 |
|
949 | 951 | missing_2 = b'\xff' * 20 |
|
950 | 952 | cache = hgtagsfnodescache(repo.unfiltered()) |
|
951 | 953 | for r in revs: |
|
952 | 954 | cache._writeentry(r * _fnodesrecsize, missing_1, missing_2) |
|
953 | 955 | cache.write() |
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