Mercurial > public > mercurial-scm > hg-stable

annotate tests/drawdag.py @ 47055:d55b71393907

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
node: replace nullid and friends with nodeconstants class The introduction of 256bit hashes require changes to nullid and other constant magic values. Start pushing them down from repository and revlog where sensible. Differential Revision: https://phab.mercurial-scm.org/D9465
author Joerg Sonnenberger <joerg@bec.de>
date Mon, 29 Mar 2021 01:52:06 +0200
parents 59fa3890d40a
children 6000f5b25c9b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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 obsolete,
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94 pycompat,
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95 registrar,
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96 scmutil,
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97 tags as tagsmod,
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98 )
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99
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100 cmdtable = {}
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101 command = registrar.command(cmdtable)
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102
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103 _pipechars = b'\\/+-|'
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104 _nonpipechars = b''.join(
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105 pycompat.bytechr(i)
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106 for i in range(33, 127)
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107 if pycompat.bytechr(i) not in _pipechars
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108 )
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109
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110
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111 def _isname(ch):
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112 """char -> bool. return True if ch looks like part of a name, False
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113 otherwise"""
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114 return ch in _nonpipechars
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115
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116
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117 def _parseasciigraph(text):
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118 r"""str -> {str : [str]}. convert the ASCII graph to edges
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119
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120 >>> import pprint
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121 >>> pprint.pprint({pycompat.sysstr(k): [pycompat.sysstr(vv) for vv in v]
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122 ... for k, v in _parseasciigraph(br'''
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123 ... G
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124 ... |
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125 ... I D C F # split: B -> E, F, G
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126 ... \ \| | # replace: C -> D -> H
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127 ... H B E # prune: F, I
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128 ... \|/
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129 ... A
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130 ... ''').items()})
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131 {'A': [],
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132 'B': ['A'],
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133 'C': ['B'],
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134 'D': ['B'],
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135 'E': ['A'],
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136 'F': ['E'],
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137 'G': ['F'],
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138 'H': ['A'],
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139 'I': ['H']}
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140 >>> pprint.pprint({pycompat.sysstr(k): [pycompat.sysstr(vv) for vv in v]
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141 ... for k, v in _parseasciigraph(br'''
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142 ... o foo
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143 ... |\
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144 ... +---o bar
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145 ... | | |
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146 ... | o | baz
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147 ... | /
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148 ... +---o d
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149 ... | |
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150 ... +---o c
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151 ... | |
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152 ... o | b
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153 ... |/
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154 ... o a
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155 ... ''').items()})
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156 {'a': [],
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157 'b': ['a'],
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158 'bar': ['b', 'a'],
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159 'baz': [],
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160 'c': ['b'],
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161 'd': ['b'],
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162 'foo': ['baz', 'b']}
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163 """
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164 lines = text.splitlines()
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165 edges = collections.defaultdict(list) # {node: []}
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166
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167 def get(y, x):
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168 """(int, int) -> char. give a coordinate, return the char. return a
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169 space for anything out of range"""
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170 if x < 0 or y < 0:
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171 return b' '
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172 try:
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173 return lines[y][x : x + 1] or b' '
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174 except IndexError:
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175 return b' '
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176
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177 def getname(y, x):
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178 """(int, int) -> str. like get(y, x) but concatenate left and right
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179 parts. if name is an 'o', try to replace it to the right"""
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180 result = b''
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181 for i in itertools.count(0):
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182 ch = get(y, x - i)
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183 if not _isname(ch):
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184 break
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185 result = ch + result
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186 for i in itertools.count(1):
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187 ch = get(y, x + i)
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188 if not _isname(ch):
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189 break
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190 result += ch
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191 if result == b'o':
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192 # special handling, find the name to the right
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193 result = b''
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194 for i in itertools.count(2):
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195 ch = get(y, x + i)
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196 if ch == b' ' or ch in _pipechars:
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197 if result or x + i >= len(lines[y]):
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198 break
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199 else:
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200 result += ch
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201 return result or b'o'
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202 return result
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203
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204 def parents(y, x):
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205 """(int, int) -> [str]. follow the ASCII edges at given position,
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206 return a list of parents"""
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207 visited = {(y, x)}
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208 visit = []
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209 result = []
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210
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211 def follow(y, x, expected):
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212 """conditionally append (y, x) to visit array, if it's a char
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213 in excepted. 'o' in expected means an '_isname' test.
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214 if '-' (or '+') is not in excepted, and get(y, x) is '-' (or '+'),
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215 the next line (y + 1, x) will be checked instead."""
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216 ch = get(y, x)
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217 if any(ch == c and c not in expected for c in (b'-', b'+')):
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218 y += 1
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219 return follow(y + 1, x, expected)
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220 if ch in expected or (b'o' in expected and _isname(ch)):
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221 visit.append((y, x))
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222
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223 # -o- # starting point:
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224 # /|\ # follow '-' (horizontally), and '/|\' (to the bottom)
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225 follow(y + 1, x, b'|')
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226 follow(y + 1, x - 1, b'/')
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227 follow(y + 1, x + 1, b'\\')
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228 follow(y, x - 1, b'-')
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229 follow(y, x + 1, b'-')
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230
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231 while visit:
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232 y, x = visit.pop()
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233 if (y, x) in visited:
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234 continue
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235 visited.add((y, x))
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236 ch = get(y, x)
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237 if _isname(ch):
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238 result.append(getname(y, x))
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239 continue
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240 elif ch == b'|':
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241 follow(y + 1, x, b'/|o')
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242 follow(y + 1, x - 1, b'/')
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243 follow(y + 1, x + 1, b'\\')
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244 elif ch == b'+':
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245 follow(y, x - 1, b'-')
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246 follow(y, x + 1, b'-')
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247 follow(y + 1, x - 1, b'/')
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248 follow(y + 1, x + 1, b'\\')
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249 follow(y + 1, x, b'|')
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250 elif ch == b'\\':
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251 follow(y + 1, x + 1, b'\\|o')
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252 elif ch == b'/':
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253 follow(y + 1, x - 1, b'/|o')
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254 elif ch == b'-':
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255 follow(y, x - 1, b'-+o')
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256 follow(y, x + 1, b'-+o')
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257 return result
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258
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259 for y, line in enumerate(lines):
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260 for x, ch in enumerate(pycompat.bytestr(line)):
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261 if ch == b'#': # comment
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262 break
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263 if _isname(ch):
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264 edges[getname(y, x)] += parents(y, x)
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265
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266 return dict(edges)
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267
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268
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269 class simplefilectx(object):
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270 def __init__(self, path, data):
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271 self._data = data
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272 self._path = path
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273
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274 def data(self):
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275 return self._data
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276
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277 def filenode(self):
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278 return None
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279
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280 def path(self):
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281 return self._path
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282
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diff changeset
283 def copysource(self):
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284 return None
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285
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286 def flags(self):
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287 return b''
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288
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289
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290 class simplecommitctx(context.committablectx):
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291 def __init__(self, repo, name, parentctxs, added):
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292 opts = {
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293 'changes': scmutil.status([], list(added), [], [], [], [], []),
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294 'date': b'0 0',
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295 'extra': {b'branch': b'default'},
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296 }
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297 super(simplecommitctx, self).__init__(repo, name, **opts)
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298 self._added = added
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299 self._parents = parentctxs
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300 while len(self._parents) < 2:
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301 self._parents.append(repo[repo.nullid])
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302
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303 def filectx(self, key):
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304 return simplefilectx(key, self._added[key])
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305
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306 def commit(self):
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307 return self._repo.commitctx(self)
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308
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309 def p1copies(self):
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310 return {}
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311
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312 def p2copies(self):
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313 return {}
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314
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315
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316 def _walkgraph(edges):
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317 """yield node, parents in topologically order"""
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318 visible = set(edges.keys())
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319 remaining = {} # {str: [str]}
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320 for k, vs in edges.items():
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321 for v in vs:
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322 if v not in remaining:
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323 remaining[v] = []
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324 remaining[k] = vs[:]
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325 while remaining:
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326 leafs = [k for k, v in remaining.items() if not v]
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327 if not leafs:
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328 raise error.Abort(_('the graph has cycles'))
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329 for leaf in sorted(leafs):
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330 if leaf in visible:
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331 yield leaf, edges[leaf]
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332 del remaining[leaf]
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333 for k, v in remaining.items():
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334 if leaf in v:
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335 v.remove(leaf)
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336
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337
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338 def _getcomments(text):
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339 r"""
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340 >>> [pycompat.sysstr(s) for s in _getcomments(br'''
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341 ... G
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342 ... |
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343 ... I D C F # split: B -> E, F, G
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344 ... \ \| | # replace: C -> D -> H
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345 ... H B E # prune: F, I
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346 ... \|/
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347 ... A
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348 ... ''')]
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349 ['split: B -> E, F, G', 'replace: C -> D -> H', 'prune: F, I']
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diff changeset
350 """
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351 for line in text.splitlines():
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352 if b' # ' not in line:
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353 continue
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354 yield line.split(b' # ', 1)[1].split(b' # ')[0].strip()
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diff changeset
355
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diff changeset
356
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357 @command(b'debugdrawdag', [])
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358 def debugdrawdag(ui, repo, **opts):
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359 r"""read an ASCII graph from stdin and create changesets
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360
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diff changeset
361 The ASCII graph is like what :hg:`log -G` outputs, with each `o` replaced
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362 to the name of the node. The command will create dummy changesets and local
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diff changeset
363 tags with those names to make the dummy changesets easier to be referred
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
364 to.
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parents:
diff changeset
365
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diff changeset
366 If the name of a node is a single character 'o', It will be replaced by the
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diff changeset
367 word to the right. This makes it easier to reuse
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368 :hg:`log -G -T '{desc}'` outputs.
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diff changeset
369
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370 For root (no parents) nodes, revset can be used to query existing repo.
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371 Note that the revset cannot have confusing characters which can be seen as
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diff changeset
372 the part of the graph edges, like `|/+-\`.
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373 """
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374 text = ui.fin.read()
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diff changeset
375
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parents:
diff changeset
376 # parse the graph and make sure len(parents) <= 2 for each node
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diff changeset
377 edges = _parseasciigraph(text)
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diff changeset
378 for k, v in edges.items():
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diff changeset
379 if len(v) > 2:
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diff changeset
380 raise error.Abort(_('%s: too many parents: %s') % (k, b' '.join(v)))
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diff changeset
381
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diff changeset
382 # parse comments to get extra file content instructions
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diff changeset
383 files = collections.defaultdict(dict) # {(name, path): content}
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diff changeset
384 comments = list(_getcomments(text))
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diff changeset
385 filere = re.compile(br'^(\w+)/([\w/]+)\s*=\s*(.*)$', re.M)
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parents: 34213
diff changeset
386 for name, path, content in filere.findall(b'\n'.join(comments)):
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diff changeset
387 content = content.replace(br'\n', b'\n').replace(br'\1', b'\1')
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diff changeset
388 files[name][path] = content
33809
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diff changeset
389
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diff changeset
390 committed = {None: repo.nullid} # {name: node}
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diff changeset
391
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parents:
diff changeset
392 # for leaf nodes, try to find existing nodes in repo
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diff changeset
393 for name, parents in edges.items():
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diff changeset
394 if len(parents) == 0:
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
395 try:
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parents:
diff changeset
396 committed[name] = scmutil.revsingle(repo, name)
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
397 except error.RepoLookupError:
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parents:
diff changeset
398 pass
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
399
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
400 # commit in topological order
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parents:
diff changeset
401 for name, parents in _walkgraph(edges):
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parents:
diff changeset
402 if name in committed:
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
403 continue
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
404 pctxs = [repo[committed[n]] for n in parents]
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diff changeset
405 pctxs.sort(key=lambda c: c.node())
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diff changeset
406 added = {}
0103e7187237 drawdag: include files from both parents in merge commits
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diff changeset
407 if len(parents) > 1:
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diff changeset
408 # If it's a merge, take the files and contents from the parents
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diff changeset
409 for f in pctxs[1].manifest():
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Martin von Zweigbergk <martinvonz@google.com>
parents: 33174
diff changeset
410 if f not in pctxs[0].manifest():
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diff changeset
411 added[f] = pctxs[1][f].data()
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diff changeset
412 else:
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parents: 33174
diff changeset
413 # If it's not a merge, add a single file
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parents: 33174
diff changeset
414 added[name] = name
33809
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parents: 33558
diff changeset
415 # add extra file contents in comments
0531ffd59a98 drawdag: allow override file contents via comments
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parents: 33558
diff changeset
416 for path, content in files.get(name, {}).items():
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parents: 33558
diff changeset
417 added[path] = content
33558
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diff changeset
418 ctx = simplecommitctx(repo, name, pctxs, added)
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parents:
diff changeset
419 n = ctx.commit()
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parents:
diff changeset
420 committed[name] = n
43076
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Augie Fackler <augie@google.com>
parents: 42521
diff changeset
421 tagsmod.tag(
2372284d9457 formatting: blacken the codebase
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parents: 42521
diff changeset
422 repo, [name], n, message=None, user=None, date=None, local=True
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42521
diff changeset
423 )
33159
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32376
diff changeset
424
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32376
diff changeset
425 # handle special comments
34214
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diff changeset
426 with repo.wlock(), repo.lock(), repo.transaction(b'drawdag'):
33159
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diff changeset
427 getctx = lambda x: repo.unfiltered()[committed[x.strip()]]
33809
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parents: 33558
diff changeset
428 for comment in comments:
43076
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parents: 42521
diff changeset
429 rels = [] # obsolete relationships
34214
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430 args = comment.split(b':', 1)
33159
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Jun Wu <quark@fb.com>
parents: 32376
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431 if len(args) <= 1:
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parents: 32376
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432 continue
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parents: 32376
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433
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parents: 32376
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434 cmd = args[0].strip()
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435 arg = args[1].strip()
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parents: 32376
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436
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parents: 34213
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437 if cmd in (b'replace', b'rebase', b'amend'):
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parents: 34213
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438 nodes = [getctx(m) for m in arg.split(b'->')]
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parents: 32376
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439 for i in range(len(nodes) - 1):
44411
dda2341d6664 drawdag: abide by new createmarkers() API
Martin von Zweigbergk <martinvonz@google.com>
parents: 43076
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440 rels.append(((nodes[i],), (nodes[i + 1],)))
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parents: 34213
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441 elif cmd in (b'split',):
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parents: 34213
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442 pre, succs = arg.split(b'->')
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parents: 34213
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443 succs = succs.split(b',')
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Martin von Zweigbergk <martinvonz@google.com>
parents: 43076
diff changeset
444 rels.append(((getctx(pre),), (getctx(s) for s in succs)))
34214
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Augie Fackler <raf@durin42.com>
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445 elif cmd in (b'prune',):
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parents: 34213
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446 for n in arg.split(b','):
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Martin von Zweigbergk <martinvonz@google.com>
parents: 43076
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447 rels.append(((getctx(n),), ()))
33159
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Jun Wu <quark@fb.com>
parents: 32376
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448 if rels:
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Jun Wu <quark@fb.com>
parents: 32376
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449 obsolete.createmarkers(repo, rels, date=(0, 0), operation=cmd)