Mercurial > hg
annotate tests/test-generaldelta.t @ 27372:a79cba6cb206
help: add documentation for changegroup formats
There is no formal location for spec-like technical/internal docs. The
repository makes sense as such a location because spec-like
documentation should be reviewed (ruling out a wiki). mpm has also
stated that he would like this documentation to be part of the
built-in help system. So, we establish an "internals" sub-directory
to hold this class of documentation.
The format of changegroups does not appear to be documented anywhere,
even in source code. It therefore seemed like an appropriate first thing
to document.
This patch adds low-level documentation of versions 1 and 2 of the
changegroup foromat. It currently only describes the raw data format.
There is probably room to write higher-level documentation on strategies
for producing and consuming the data. We'll leave that for another day.
The added file is not yet accessible via `hg help` nor via hgweb.
Support for this will follow in subsequent patches.
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sun, 25 Oct 2015 00:19:45 +0100 |
parents | d9bfe6289acf |
children | 6a98f9408a50 |
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1 Check whether size of generaldelta revlog is not bigger than its |
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2 regular equivalent. Test would fail if generaldelta was naive |
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3 implementation of parentdelta: third manifest revision would be fully |
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4 inserted due to big distance from its paren revision (zero). |
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5 |
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6 $ hg init repo --config format.generaldelta=no --config format.usegeneraldelta=no |
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7 $ cd repo |
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8 $ echo foo > foo |
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9 $ echo bar > bar |
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10 $ echo baz > baz |
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11 $ hg commit -q -Am boo |
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12 $ hg clone --pull . ../gdrepo -q --config format.generaldelta=yes |
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13 $ for r in 1 2 3; do |
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14 > echo $r > foo |
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15 > hg commit -q -m $r |
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16 > hg up -q -r 0 |
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17 > hg pull . -q -r $r -R ../gdrepo |
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18 > done |
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19 |
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20 $ cd .. |
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21 >>> import os |
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22 >>> regsize = os.stat("repo/.hg/store/00manifest.i").st_size |
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23 >>> gdsize = os.stat("gdrepo/.hg/store/00manifest.i").st_size |
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24 >>> if regsize < gdsize: |
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25 ... print 'generaldata increased size of manifest' |
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26 |
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27 Verify rev reordering doesnt create invalid bundles (issue4462) |
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28 This requires a commit tree that when pulled will reorder manifest revs such |
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29 that the second manifest to create a file rev will be ordered before the first |
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30 manifest to create that file rev. We also need to do a partial pull to ensure |
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31 reordering happens. At the end we verify the linkrev points at the earliest |
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32 commit. |
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33 |
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34 $ hg init server --config format.generaldelta=True |
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35 $ cd server |
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36 $ touch a |
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37 $ hg commit -Aqm a |
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38 $ echo x > x |
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39 $ echo y > y |
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40 $ hg commit -Aqm xy |
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41 $ hg up -q '.^' |
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42 $ echo x > x |
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43 $ echo z > z |
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44 $ hg commit -Aqm xz |
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45 $ hg up -q 1 |
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46 $ echo b > b |
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47 $ hg commit -Aqm b |
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48 $ hg merge -q 2 |
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49 $ hg commit -Aqm merge |
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50 $ echo c > c |
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51 $ hg commit -Aqm c |
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52 $ hg log -G -T '{rev} {shortest(node)} {desc}' |
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53 @ 5 ebb8 c |
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54 | |
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55 o 4 baf7 merge |
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56 |\ |
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57 | o 3 a129 b |
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58 | | |
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59 o | 2 958c xz |
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60 | | |
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61 | o 1 f00c xy |
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62 |/ |
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63 o 0 3903 a |
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64 |
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65 $ cd .. |
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66 $ hg init client --config format.generaldelta=false --config format.usegeneraldelta=false |
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67 $ cd client |
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68 $ hg pull -q ../server -r 4 |
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69 $ hg debugindex x |
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70 rev offset length base linkrev nodeid p1 p2 |
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71 0 0 3 0 1 1406e7411862 000000000000 000000000000 |
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72 |
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73 $ cd .. |
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74 |
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75 Test "usegeneraldelta" config |
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76 (repo are general delta, but incoming bundle are not re-deltified) |
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77 |
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78 delta coming from the server base delta server are not recompressed. |
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79 (also include the aggressive version for comparison) |
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80 |
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81 $ hg clone repo --pull --config format.usegeneraldelta=1 usegd |
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82 requesting all changes |
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83 adding changesets |
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84 adding manifests |
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85 adding file changes |
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86 added 4 changesets with 6 changes to 3 files (+2 heads) |
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87 updating to branch default |
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88 3 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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89 $ hg clone repo --pull --config format.generaldelta=1 full |
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90 requesting all changes |
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91 adding changesets |
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92 adding manifests |
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93 adding file changes |
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94 added 4 changesets with 6 changes to 3 files (+2 heads) |
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95 updating to branch default |
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96 3 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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97 $ hg -R repo debugindex -m |
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98 rev offset length base linkrev nodeid p1 p2 |
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99 0 0 104 0 0 cef96823c800 000000000000 000000000000 |
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100 1 104 57 0 1 58ab9a8d541d cef96823c800 000000000000 |
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101 2 161 57 0 2 134fdc6fd680 cef96823c800 000000000000 |
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102 3 218 104 3 3 723508934dad cef96823c800 000000000000 |
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103 $ hg -R usegd debugindex -m |
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104 rev offset length delta linkrev nodeid p1 p2 |
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105 0 0 104 -1 0 cef96823c800 000000000000 000000000000 |
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106 1 104 57 0 1 58ab9a8d541d cef96823c800 000000000000 |
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107 2 161 57 1 2 134fdc6fd680 cef96823c800 000000000000 |
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108 3 218 57 0 3 723508934dad cef96823c800 000000000000 |
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109 $ hg -R full debugindex -m |
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110 rev offset length delta linkrev nodeid p1 p2 |
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111 0 0 104 -1 0 cef96823c800 000000000000 000000000000 |
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112 1 104 57 0 1 58ab9a8d541d cef96823c800 000000000000 |
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113 2 161 57 0 2 134fdc6fd680 cef96823c800 000000000000 |
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114 3 218 57 0 3 723508934dad cef96823c800 000000000000 |
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115 |
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116 Test format.aggressivemergedeltas |
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117 |
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118 $ hg init --config format.generaldelta=1 aggressive |
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119 $ cd aggressive |
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120 $ cat << EOF >> .hg/hgrc |
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121 > [format] |
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122 > generaldelta = 1 |
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123 > EOF |
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124 $ touch a b c d e |
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125 $ hg commit -Aqm side1 |
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126 $ hg up -q null |
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127 $ touch x y |
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128 $ hg commit -Aqm side2 |
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129 |
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130 - Verify non-aggressive merge uses p1 (commit 1) as delta parent |
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131 $ hg merge -q 0 |
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132 $ hg commit -q -m merge |
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133 $ hg debugindex -m |
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134 rev offset length delta linkrev nodeid p1 p2 |
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135 0 0 59 -1 0 8dde941edb6e 000000000000 000000000000 |
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136 1 59 61 0 1 315c023f341d 000000000000 000000000000 |
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137 2 120 65 1 2 2ab389a983eb 315c023f341d 8dde941edb6e |
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138 |
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139 $ hg strip -q -r . --config extensions.strip= |
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140 |
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141 - Verify aggressive merge uses p2 (commit 0) as delta parent |
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142 $ hg up -q -C 1 |
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143 $ hg merge -q 0 |
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144 $ hg commit -q -m merge --config format.aggressivemergedeltas=True |
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145 $ hg debugindex -m |
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146 rev offset length delta linkrev nodeid p1 p2 |
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147 0 0 59 -1 0 8dde941edb6e 000000000000 000000000000 |
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148 1 59 61 0 1 315c023f341d 000000000000 000000000000 |
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149 2 120 62 0 2 2ab389a983eb 315c023f341d 8dde941edb6e |
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150 |
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151 Test that strip bundle use bundle2 |
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152 $ hg --config extensions.strip= strip . |
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153 0 files updated, 0 files merged, 5 files removed, 0 files unresolved |
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154 saved backup bundle to $TESTTMP/aggressive/.hg/strip-backup/1c5d4dc9a8b8-6c68e60c-backup.hg (glob) |
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155 $ hg debugbundle .hg/strip-backup/* |
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156 Stream params: {'Compression': 'BZ'} |
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157 changegroup -- "{'version': '02'}" |
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158 1c5d4dc9a8b8d6e1750966d343e94db665e7a1e9 |
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159 |
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160 $ cd .. |