annotate tests/drawdag.py @ 40413:1ddd202c47d9

help: allow hiding of help topics Differential Revision: https://phab.mercurial-scm.org/D5077
author rdamazio@google.com
date Sat, 13 Oct 2018 05:43:39 -0700
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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diff changeset
308 for v in vs:
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parents:
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309 if v not in remaining:
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parents:
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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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parents:
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315 raise error.Abort(_('the graph has cycles'))
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parents:
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316 for leaf in sorted(leafs):
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parents:
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317 if leaf in visible:
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parents:
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318 yield leaf, edges[leaf]
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parents:
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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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parents: 34205
diff changeset
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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parents: 34205
diff changeset
336 """
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337 for line in text.splitlines():
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diff changeset
338 if b' # ' not in line:
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diff changeset
339 continue
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340 yield line.split(b' # ', 1)[1].split(b' # ')[0].strip()
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diff changeset
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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parents:
diff changeset
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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parents:
diff changeset
348 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
349 to.
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parents:
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350
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parents:
diff changeset
351 If the name of a node is a single character 'o', It will be replaced by the
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diff changeset
352 word to the right. This makes it easier to reuse
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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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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diff changeset
357 the part of the graph edges, like `|/+-\`.
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358 """
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parents:
diff changeset
359 text = ui.fin.read()
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parents:
diff changeset
360
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parents:
diff changeset
361 # parse the graph and make sure len(parents) <= 2 for each node
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diff changeset
362 edges = _parseasciigraph(text)
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diff changeset
363 for k, v in edges.items():
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364 if len(v) > 2:
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diff changeset
365 raise error.Abort(_('%s: too many parents: %s')
34207
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diff changeset
366 % (k, b' '.join(v)))
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parents:
diff changeset
367
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diff changeset
368 # parse comments to get extra file content instructions
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diff changeset
369 files = collections.defaultdict(dict) # {(name, path): content}
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diff changeset
370 comments = list(_getcomments(text))
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diff changeset
371 filere = re.compile(br'^(\w+)/([\w/]+)\s*=\s*(.*)$', re.M)
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parents: 34206
diff changeset
372 for name, path, content in filere.findall(b'\n'.join(comments)):
36742
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parents: 34207
diff changeset
373 content = content.replace(br'\n', b'\n').replace(br'\1', b'\1')
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diff changeset
374 files[name][path] = content
33788
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diff changeset
375
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parents:
diff changeset
376 committed = {None: node.nullid} # {name: node}
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parents:
diff changeset
377
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
378 # for leaf nodes, try to find existing nodes in repo
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diff changeset
379 for name, parents in edges.items():
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parents:
diff changeset
380 if len(parents) == 0:
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
381 try:
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parents:
diff changeset
382 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
383 except error.RepoLookupError:
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
384 pass
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
Jun Wu <quark@fb.com>
parents:
diff changeset
385
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
386 # commit in topological order
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parents:
diff changeset
387 for name, parents in _walkgraph(edges):
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
388 if name in committed:
a31634336471 drawdag: update test repos by drawing the changelog DAG in ASCII
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parents:
diff changeset
389 continue
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parents:
diff changeset
390 pctxs = [repo[committed[n]] for n in parents]
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diff changeset
391 pctxs.sort(key=lambda c: c.node())
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diff changeset
392 added = {}
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diff changeset
393 if len(parents) > 1:
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Martin von Zweigbergk <martinvonz@google.com>
parents: 33172
diff changeset
394 # If it's a merge, take the files and contents from the parents
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parents: 33172
diff changeset
395 for f in pctxs[1].manifest():
0103e7187237 drawdag: include files from both parents in merge commits
Martin von Zweigbergk <martinvonz@google.com>
parents: 33172
diff changeset
396 if f not in pctxs[0].manifest():
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Martin von Zweigbergk <martinvonz@google.com>
parents: 33172
diff changeset
397 added[f] = pctxs[1][f].data()
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parents: 33172
diff changeset
398 else:
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Martin von Zweigbergk <martinvonz@google.com>
parents: 33172
diff changeset
399 # If it's not a merge, add a single file
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parents: 33172
diff changeset
400 added[name] = name
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parents: 33558
diff changeset
401 # add extra file contents in comments
0531ffd59a98 drawdag: allow override file contents via comments
Jun Wu <quark@fb.com>
parents: 33558
diff changeset
402 for path, content in files.get(name, {}).items():
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Jun Wu <quark@fb.com>
parents: 33558
diff changeset
403 added[path] = content
33558
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Martin von Zweigbergk <martinvonz@google.com>
parents: 33172
diff changeset
404 ctx = simplecommitctx(repo, name, pctxs, added)
30449
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parents:
diff changeset
405 n = ctx.commit()
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parents:
diff changeset
406 committed[name] = n
34205
6c408bfa2dab drawdag: tagsmod.tag() takes a list of names, not a single name
Augie Fackler <raf@durin42.com>
parents: 33788
diff changeset
407 tagsmod.tag(repo, [name], n, message=None, user=None, date=None,
31671
d761ef24d6e1 drawdag: use 'tagsmod.tag' instead of 'repo.tag'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents: 30449
diff changeset
408 local=True)
33153
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
409
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
410 # handle special comments
34207
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parents: 34206
diff changeset
411 with repo.wlock(), repo.lock(), repo.transaction(b'drawdag'):
33153
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parents: 32337
diff changeset
412 getctx = lambda x: repo.unfiltered()[committed[x.strip()]]
33788
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parents: 33558
diff changeset
413 for comment in comments:
33153
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parents: 32337
diff changeset
414 rels = [] # obsolete relationships
34207
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parents: 34206
diff changeset
415 args = comment.split(b':', 1)
33153
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Jun Wu <quark@fb.com>
parents: 32337
diff changeset
416 if len(args) <= 1:
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
417 continue
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
418
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
419 cmd = args[0].strip()
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
420 arg = args[1].strip()
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
421
34207
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parents: 34206
diff changeset
422 if cmd in (b'replace', b'rebase', b'amend'):
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parents: 34206
diff changeset
423 nodes = [getctx(m) for m in arg.split(b'->')]
33153
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parents: 32337
diff changeset
424 for i in range(len(nodes) - 1):
4d780d510b44 drawdag: support obsmarker creation in comments
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parents: 32337
diff changeset
425 rels.append((nodes[i], (nodes[i + 1],)))
34207
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parents: 34206
diff changeset
426 elif cmd in (b'split',):
5a1b41268b7c drawdag: port to python 3
Augie Fackler <raf@durin42.com>
parents: 34206
diff changeset
427 pre, succs = arg.split(b'->')
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parents: 34206
diff changeset
428 succs = succs.split(b',')
33153
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parents: 32337
diff changeset
429 rels.append((getctx(pre), (getctx(s) for s in succs)))
34207
5a1b41268b7c drawdag: port to python 3
Augie Fackler <raf@durin42.com>
parents: 34206
diff changeset
430 elif cmd in (b'prune',):
5a1b41268b7c drawdag: port to python 3
Augie Fackler <raf@durin42.com>
parents: 34206
diff changeset
431 for n in arg.split(b','):
33153
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
432 rels.append((getctx(n), ()))
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
433 if rels:
4d780d510b44 drawdag: support obsmarker creation in comments
Jun Wu <quark@fb.com>
parents: 32337
diff changeset
434 obsolete.createmarkers(repo, rels, date=(0, 0), operation=cmd)