Mercurial > hg
annotate tests/drawdag.py @ 40417:49c7b701fdc2 stable
phase: add an archived phase
This phase allows for hidden changesets in the "user space". It differs from
the "internal" phase which is intended for internal by-product only. There
have been discussions at the 4.8 sprint to use such phase to speedup cleanup
after history rewriting operation.
Shipping it in the same release as the 'internal-phase' groups the associated
`requires` entry. The important bit is to have support for this phase in the
earliest version of mercurial possible. Adding the UI to manipulate this new
phase later seems fine.
The current plan for archived usage and user interface are as follow. On a
repository with internal-phase on and evolution off:
* history rewriting command set rewritten changeset in the archived phase.
(This mean updating the cleanupnodes method).
* keep `hg unbundle .hg/strip-backup/X.hg` as a way to restore changeset for
now
(backup bundle need to contains phase data)
* [maybe] add a `hg strip --soft` advance flag
(a light way to expose the feature without getting in the way of a better
UI)
Mercurial 4.8 freeze is too close to get the above in by then.
We don't introduce a new repository `requirement` as we reuse the one
introduced with the 'archived' phase during the 4.8 cycle.
author | Boris Feld <boris.feld@octobus.net> |
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date | Wed, 17 Oct 2018 14:47:01 +0200 |
parents | 9a813e4c8406 |
children | 8d4ee2d9ffb8 |
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1 # drawdag.py - convert ASCII revision DAG to actual changesets |
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2 # |
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3 # Copyright 2016 Facebook, Inc. |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 """ |
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8 create changesets from an ASCII graph for testing purpose. |
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9 |
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10 For example, given the following input:: |
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11 |
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12 c d |
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13 |/ |
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14 b |
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15 | |
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16 a |
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17 |
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18 4 changesets and 4 local tags will be created. |
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19 `hg log -G -T "{rev} {desc} (tag: {tags})"` will output:: |
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20 |
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21 o 3 d (tag: d tip) |
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22 | |
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23 | o 2 c (tag: c) |
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24 |/ |
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25 o 1 b (tag: b) |
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26 | |
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27 o 0 a (tag: a) |
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28 |
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29 For root nodes (nodes without parents) in the graph, they can be revsets |
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30 pointing to existing nodes. The ASCII graph could also have disconnected |
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31 components with same names referring to the same changeset. |
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32 |
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33 Therefore, given the repo having the 4 changesets (and tags) above, with the |
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34 following ASCII graph as input:: |
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35 |
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36 foo bar bar foo |
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37 | / | | |
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38 ancestor(c,d) a baz |
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39 |
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40 The result (`hg log -G -T "{desc}"`) will look like:: |
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41 |
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42 o foo |
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43 |\ |
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44 +---o bar |
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45 | | | |
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46 | o | baz |
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47 | / |
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48 +---o d |
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49 | | |
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50 +---o c |
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51 | | |
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52 o | b |
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53 |/ |
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54 o a |
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55 |
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56 Note that if you take the above `hg log` output directly as input. It will work |
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57 as expected - the result would be an isomorphic graph:: |
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58 |
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59 o foo |
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60 |\ |
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61 | | o d |
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62 | |/ |
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63 | | o c |
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64 | |/ |
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65 | | o bar |
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66 | |/| |
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67 | o | b |
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68 | |/ |
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69 o / baz |
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70 / |
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71 o a |
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72 |
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73 This is because 'o' is specially handled in the input: instead of using 'o' as |
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74 the node name, the word to the right will be used. |
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75 |
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76 Some special comments could have side effects: |
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77 |
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78 - Create obsmarkers |
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79 # replace: A -> B -> C -> D # chained 1 to 1 replacements |
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80 # split: A -> B, C # 1 to many |
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81 # prune: A, B, C # many to nothing |
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82 """ |
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83 from __future__ import absolute_import, print_function |
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84 |
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85 import collections |
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86 import itertools |
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87 import re |
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88 |
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89 from mercurial.i18n import _ |
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90 from mercurial import ( |
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91 context, |
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92 error, |
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93 node, |
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94 obsolete, |
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95 pycompat, |
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96 registrar, |
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97 scmutil, |
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98 tags as tagsmod, |
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99 ) |
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100 |
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101 cmdtable = {} |
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102 command = registrar.command(cmdtable) |
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103 |
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104 _pipechars = b'\\/+-|' |
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105 _nonpipechars = b''.join(pycompat.bytechr(i) for i in range(33, 127) |
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106 if pycompat.bytechr(i) not in _pipechars) |
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107 |
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108 def _isname(ch): |
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109 """char -> bool. return True if ch looks like part of a name, False |
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110 otherwise""" |
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111 return ch in _nonpipechars |
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112 |
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113 def _parseasciigraph(text): |
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114 r"""str -> {str : [str]}. convert the ASCII graph to edges |
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115 |
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116 >>> import pprint |
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117 >>> pprint.pprint({pycompat.sysstr(k): [pycompat.sysstr(vv) for vv in v] |
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118 ... for k, v in _parseasciigraph(br''' |
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119 ... G |
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120 ... | |
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121 ... I D C F # split: B -> E, F, G |
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122 ... \ \| | # replace: C -> D -> H |
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123 ... H B E # prune: F, I |
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124 ... \|/ |
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125 ... A |
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126 ... ''').items()}) |
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127 {'A': [], |
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128 'B': ['A'], |
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129 'C': ['B'], |
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130 'D': ['B'], |
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131 'E': ['A'], |
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132 'F': ['E'], |
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133 'G': ['F'], |
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134 'H': ['A'], |
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135 'I': ['H']} |
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136 >>> pprint.pprint({pycompat.sysstr(k): [pycompat.sysstr(vv) for vv in v] |
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137 ... for k, v in _parseasciigraph(br''' |
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138 ... o foo |
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139 ... |\ |
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140 ... +---o bar |
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141 ... | | | |
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142 ... | o | baz |
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143 ... | / |
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144 ... +---o d |
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145 ... | | |
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146 ... +---o c |
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147 ... | | |
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148 ... o | b |
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149 ... |/ |
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150 ... o a |
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151 ... ''').items()}) |
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152 {'a': [], |
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153 'b': ['a'], |
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154 'bar': ['b', 'a'], |
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155 'baz': [], |
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156 'c': ['b'], |
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157 'd': ['b'], |
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158 'foo': ['baz', 'b']} |
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159 """ |
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160 lines = text.splitlines() |
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161 edges = collections.defaultdict(list) # {node: []} |
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162 |
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163 def get(y, x): |
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164 """(int, int) -> char. give a coordinate, return the char. return a |
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165 space for anything out of range""" |
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166 if x < 0 or y < 0: |
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167 return b' ' |
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168 try: |
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169 return lines[y][x:x + 1] or b' ' |
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170 except IndexError: |
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171 return b' ' |
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172 |
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173 def getname(y, x): |
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174 """(int, int) -> str. like get(y, x) but concatenate left and right |
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175 parts. if name is an 'o', try to replace it to the right""" |
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176 result = b'' |
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177 for i in itertools.count(0): |
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178 ch = get(y, x - i) |
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179 if not _isname(ch): |
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180 break |
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181 result = ch + result |
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182 for i in itertools.count(1): |
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183 ch = get(y, x + i) |
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184 if not _isname(ch): |
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185 break |
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186 result += ch |
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187 if result == b'o': |
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188 # special handling, find the name to the right |
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189 result = b'' |
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190 for i in itertools.count(2): |
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191 ch = get(y, x + i) |
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192 if ch == b' ' or ch in _pipechars: |
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193 if result or x + i >= len(lines[y]): |
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194 break |
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195 else: |
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196 result += ch |
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197 return result or b'o' |
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198 return result |
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199 |
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200 def parents(y, x): |
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201 """(int, int) -> [str]. follow the ASCII edges at given position, |
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202 return a list of parents""" |
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203 visited = {(y, x)} |
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204 visit = [] |
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205 result = [] |
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206 |
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207 def follow(y, x, expected): |
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208 """conditionally append (y, x) to visit array, if it's a char |
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209 in excepted. 'o' in expected means an '_isname' test. |
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210 if '-' (or '+') is not in excepted, and get(y, x) is '-' (or '+'), |
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211 the next line (y + 1, x) will be checked instead.""" |
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212 ch = get(y, x) |
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213 if any(ch == c and c not in expected for c in (b'-', b'+')): |
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214 y += 1 |
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215 return follow(y + 1, x, expected) |
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216 if ch in expected or (b'o' in expected and _isname(ch)): |
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217 visit.append((y, x)) |
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218 |
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219 # -o- # starting point: |
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220 # /|\ # follow '-' (horizontally), and '/|\' (to the bottom) |
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221 follow(y + 1, x, b'|') |
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222 follow(y + 1, x - 1, b'/') |
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223 follow(y + 1, x + 1, b'\\') |
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224 follow(y, x - 1, b'-') |
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225 follow(y, x + 1, b'-') |
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226 |
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227 while visit: |
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228 y, x = visit.pop() |
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229 if (y, x) in visited: |
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230 continue |
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231 visited.add((y, x)) |
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232 ch = get(y, x) |
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233 if _isname(ch): |
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234 result.append(getname(y, x)) |
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235 continue |
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236 elif ch == b'|': |
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237 follow(y + 1, x, b'/|o') |
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238 follow(y + 1, x - 1, b'/') |
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239 follow(y + 1, x + 1, b'\\') |
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240 elif ch == b'+': |
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241 follow(y, x - 1, b'-') |
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242 follow(y, x + 1, b'-') |
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243 follow(y + 1, x - 1, b'/') |
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244 follow(y + 1, x + 1, b'\\') |
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245 follow(y + 1, x, b'|') |
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246 elif ch == b'\\': |
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247 follow(y + 1, x + 1, b'\\|o') |
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248 elif ch == b'/': |
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249 follow(y + 1, x - 1, b'/|o') |
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250 elif ch == b'-': |
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251 follow(y, x - 1, b'-+o') |
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252 follow(y, x + 1, b'-+o') |
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253 return result |
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254 |
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255 for y, line in enumerate(lines): |
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256 for x, ch in enumerate(pycompat.bytestr(line)): |
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257 if ch == b'#': # comment |
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258 break |
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259 if _isname(ch): |
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260 edges[getname(y, x)] += parents(y, x) |
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261 |
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262 return dict(edges) |
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263 |
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264 class simplefilectx(object): |
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265 def __init__(self, path, data): |
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266 self._data = data |
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267 self._path = path |
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268 |
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269 def data(self): |
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270 return self._data |
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271 |
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272 def filenode(self): |
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273 return None |
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274 |
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275 def path(self): |
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276 return self._path |
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277 |
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278 def renamed(self): |
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279 return None |
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280 |
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281 def flags(self): |
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282 return b'' |
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283 |
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284 class simplecommitctx(context.committablectx): |
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285 def __init__(self, repo, name, parentctxs, added): |
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286 opts = { |
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287 'changes': scmutil.status([], list(added), [], [], [], [], []), |
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288 'date': b'0 0', |
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289 'extra': {b'branch': b'default'}, |
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290 } |
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291 super(simplecommitctx, self).__init__(repo, name, **opts) |
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292 self._added = added |
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293 self._parents = parentctxs |
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294 while len(self._parents) < 2: |
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295 self._parents.append(repo[node.nullid]) |
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296 |
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297 def filectx(self, key): |
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298 return simplefilectx(key, self._added[key]) |
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299 |
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300 def commit(self): |
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301 return self._repo.commitctx(self) |
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302 |
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303 def _walkgraph(edges): |
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304 """yield node, parents in topologically order""" |
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305 visible = set(edges.keys()) |
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306 remaining = {} # {str: [str]} |
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307 for k, vs in edges.items(): |
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308 for v in vs: |
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309 if v not in remaining: |
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310 remaining[v] = [] |
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311 remaining[k] = vs[:] |
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312 while remaining: |
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313 leafs = [k for k, v in remaining.items() if not v] |
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314 if not leafs: |
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315 raise error.Abort(_('the graph has cycles')) |
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316 for leaf in sorted(leafs): |
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317 if leaf in visible: |
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318 yield leaf, edges[leaf] |
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319 del remaining[leaf] |
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320 for k, v in remaining.items(): |
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321 if leaf in v: |
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322 v.remove(leaf) |
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323 |
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324 def _getcomments(text): |
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325 """ |
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326 >>> [pycompat.sysstr(s) for s in _getcomments(br''' |
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327 ... G |
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328 ... | |
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329 ... I D C F # split: B -> E, F, G |
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330 ... \ \| | # replace: C -> D -> H |
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331 ... H B E # prune: F, I |
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332 ... \|/ |
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333 ... A |
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334 ... ''')] |
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335 ['split: B -> E, F, G', 'replace: C -> D -> H', 'prune: F, I'] |
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336 """ |
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337 for line in text.splitlines(): |
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338 if b' # ' not in line: |
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339 continue |
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340 yield line.split(b' # ', 1)[1].split(b' # ')[0].strip() |
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341 |
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342 @command(b'debugdrawdag', []) |
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343 def debugdrawdag(ui, repo, **opts): |
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344 """read an ASCII graph from stdin and create changesets |
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345 |
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346 The ASCII graph is like what :hg:`log -G` outputs, with each `o` replaced |
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347 to the name of the node. The command will create dummy changesets and local |
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348 tags with those names to make the dummy changesets easier to be referred |
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349 to. |
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350 |
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351 If the name of a node is a single character 'o', It will be replaced by the |
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352 word to the right. This makes it easier to reuse |
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353 :hg:`log -G -T '{desc}'` outputs. |
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354 |
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355 For root (no parents) nodes, revset can be used to query existing repo. |
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356 Note that the revset cannot have confusing characters which can be seen as |
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357 the part of the graph edges, like `|/+-\`. |
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358 """ |
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359 text = ui.fin.read() |
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360 |
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361 # parse the graph and make sure len(parents) <= 2 for each node |
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362 edges = _parseasciigraph(text) |
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363 for k, v in edges.items(): |
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364 if len(v) > 2: |
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365 raise error.Abort(_('%s: too many parents: %s') |
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366 % (k, b' '.join(v))) |
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367 |
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368 # parse comments to get extra file content instructions |
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369 files = collections.defaultdict(dict) # {(name, path): content} |
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370 comments = list(_getcomments(text)) |
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371 filere = re.compile(br'^(\w+)/([\w/]+)\s*=\s*(.*)$', re.M) |
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372 for name, path, content in filere.findall(b'\n'.join(comments)): |
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373 content = content.replace(br'\n', b'\n').replace(br'\1', b'\1') |
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374 files[name][path] = content |
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375 |
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376 committed = {None: node.nullid} # {name: node} |
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377 |
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378 # for leaf nodes, try to find existing nodes in repo |
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379 for name, parents in edges.items(): |
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380 if len(parents) == 0: |
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381 try: |
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382 committed[name] = scmutil.revsingle(repo, name) |
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383 except error.RepoLookupError: |
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384 pass |
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385 |
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386 # commit in topological order |
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387 for name, parents in _walkgraph(edges): |
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388 if name in committed: |
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389 continue |
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390 pctxs = [repo[committed[n]] for n in parents] |
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391 pctxs.sort(key=lambda c: c.node()) |
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392 added = {} |
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393 if len(parents) > 1: |
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394 # If it's a merge, take the files and contents from the parents |
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395 for f in pctxs[1].manifest(): |
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396 if f not in pctxs[0].manifest(): |
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397 added[f] = pctxs[1][f].data() |
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398 else: |
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399 # If it's not a merge, add a single file |
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400 added[name] = name |
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401 # add extra file contents in comments |
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402 for path, content in files.get(name, {}).items(): |
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403 added[path] = content |
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404 ctx = simplecommitctx(repo, name, pctxs, added) |
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405 n = ctx.commit() |
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406 committed[name] = n |
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407 tagsmod.tag(repo, [name], n, message=None, user=None, date=None, |
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408 local=True) |
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409 |
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410 # handle special comments |
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411 with repo.wlock(), repo.lock(), repo.transaction(b'drawdag'): |
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412 getctx = lambda x: repo.unfiltered()[committed[x.strip()]] |
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413 for comment in comments: |
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414 rels = [] # obsolete relationships |
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415 args = comment.split(b':', 1) |
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416 if len(args) <= 1: |
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417 continue |
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418 |
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419 cmd = args[0].strip() |
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420 arg = args[1].strip() |
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421 |
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422 if cmd in (b'replace', b'rebase', b'amend'): |
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423 nodes = [getctx(m) for m in arg.split(b'->')] |
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424 for i in range(len(nodes) - 1): |
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425 rels.append((nodes[i], (nodes[i + 1],))) |
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426 elif cmd in (b'split',): |
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427 pre, succs = arg.split(b'->') |
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428 succs = succs.split(b',') |
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429 rels.append((getctx(pre), (getctx(s) for s in succs))) |
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430 elif cmd in (b'prune',): |
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431 for n in arg.split(b','): |
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432 rels.append((getctx(n), ())) |
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433 if rels: |
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434 obsolete.createmarkers(repo, rels, date=(0, 0), operation=cmd) |