Mercurial > public > mercurial-scm > hg-stable

annotate hgext/graphlog.py @ 7374:ccec5ae82282

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graphlog: kill whitespace from earlier refactoring
author Dirkjan Ochtman <dirkjan@ochtman.nl>
date Fri, 14 Nov 2008 18:34:47 +0100
parents 6ad2b914acbd
children ef22cb8896d6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # ASCII graph log extension for Mercurial
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2 #
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3 # Copyright 2007 Joel Rosdahl <joel@rosdahl.net>
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4 #
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5 # This software may be used and distributed according to the terms of
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6 # the GNU General Public License, incorporated herein by reference.
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7 '''show revision graphs in terminal windows'''
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8
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9 import os
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10 import sys
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11 from mercurial.cmdutil import revrange, show_changeset
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12 from mercurial.commands import templateopts
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13 from mercurial.i18n import _
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14 from mercurial.node import nullrev
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15 from mercurial.util import Abort, canonpath
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16
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17 def revisions(repo, start, stop):
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18 """cset DAG generator yielding (rev, node, [parents]) tuples
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19
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20 This generator function walks through the revision history from revision
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21 start to revision stop (which must be less than or equal to start).
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22 """
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23 assert start >= stop
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24 cur = start
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25 while cur >= stop:
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26 ctx = repo[cur]
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27 parents = sorted(p.rev() for p in ctx.parents() if p.rev() != nullrev)
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28 yield (ctx, parents)
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29 cur -= 1
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30
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31 def filerevs(repo, path, start, stop):
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32 """file cset DAG generator yielding (rev, node, [parents]) tuples
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33
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34 This generator function walks through the revision history of a single
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35 file from revision start to revision stop (which must be less than or
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36 equal to start).
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37 """
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38 assert start >= stop
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39 filerev = len(repo.file(path)) - 1
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40 while filerev >= 0:
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41 fctx = repo.filectx(path, fileid=filerev)
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42 parents = [f.filerev() for f in fctx.parents() if f.path() == path]
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43 parents.sort()
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44 if fctx.rev() <= start:
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45 yield (fctx, parents)
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46 if fctx.rev() <= stop:
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47 break
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48 filerev -= 1
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49
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50 def grapher(nodes):
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51 """grapher for asciigraph on a list of nodes and their parents
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52
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53 nodes must generate tuples (node, parents, char, lines) where
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54 - parents must generate the parents of node, in sorted order,
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55 and max length 2,
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56 - char is the char to print as the node symbol, and
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57 - lines are the lines to display next to the node.
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58 """
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59 seen = []
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60 for node, parents, char, lines in nodes:
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61 if node not in seen:
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62 seen.append(node)
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63 nodeidx = seen.index(node)
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64
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65 knownparents = []
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66 newparents = []
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67 for parent in parents:
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68 if parent in seen:
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69 knownparents.append(parent)
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70 else:
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71 newparents.append(parent)
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72
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73 ncols = len(seen)
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74 nextseen = seen[:]
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75 nextseen[nodeidx:nodeidx + 1] = newparents
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76 edges = [(nodeidx, nextseen.index(p)) for p in knownparents]
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77
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78 if len(newparents) > 0:
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79 edges.append((nodeidx, nodeidx))
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80 if len(newparents) > 1:
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81 edges.append((nodeidx, nodeidx + 1))
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82 nmorecols = len(nextseen) - ncols
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83 seen = nextseen
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84 yield (char, lines, nodeidx, edges, ncols, nmorecols)
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85
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86 def fix_long_right_edges(edges):
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87 for (i, (start, end)) in enumerate(edges):
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88 if end > start:
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89 edges[i] = (start, end + 1)
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90
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91 def get_nodeline_edges_tail(
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92 node_index, p_node_index, n_columns, n_columns_diff, p_diff, fix_tail):
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93 if fix_tail and n_columns_diff == p_diff and n_columns_diff != 0:
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94 # Still going in the same non-vertical direction.
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95 if n_columns_diff == -1:
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96 start = max(node_index + 1, p_node_index)
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97 tail = ["|", " "] * (start - node_index - 1)
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98 tail.extend(["/", " "] * (n_columns - start))
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99 return tail
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100 else:
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101 return ["\\", " "] * (n_columns - node_index - 1)
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102 else:
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103 return ["|", " "] * (n_columns - node_index - 1)
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104
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105 def draw_edges(edges, nodeline, interline):
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106 for (start, end) in edges:
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107 if start == end + 1:
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108 interline[2 * end + 1] = "/"
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109 elif start == end - 1:
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110 interline[2 * start + 1] = "\\"
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111 elif start == end:
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112 interline[2 * start] = "|"
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113 else:
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114 nodeline[2 * end] = "+"
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115 if start > end:
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116 (start, end) = (end,start)
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117 for i in range(2 * start + 1, 2 * end):
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118 if nodeline[i] != "+":
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119 nodeline[i] = "-"
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120
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121 def get_padding_line(ni, n_columns, edges):
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122 line = []
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123 line.extend(["|", " "] * ni)
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124 if (ni, ni - 1) in edges or (ni, ni) in edges:
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125 # (ni, ni - 1) (ni, ni)
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126 # | | | | | | | |
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127 # +---o | | o---+
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128 # | | c | | c | |
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129 # | |/ / | |/ /
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130 # | | | | | |
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131 c = "|"
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132 else:
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133 c = " "
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134 line.extend([c, " "])
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135 line.extend(["|", " "] * (n_columns - ni - 1))
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136 return line
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137
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138 def ascii(ui, grapher):
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139 """prints an ASCII graph of the DAG returned by the grapher
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140
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141 grapher is a generator that emits tuples with the following elements:
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142
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143 - Character to use as node's symbol.
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144 - List of lines to display as the node's text.
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145 - Column of the current node in the set of ongoing edges.
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146 - Edges; a list of (col, next_col) indicating the edges between
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diff changeset
147 the current node and its parents.
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148 - Number of columns (ongoing edges) in the current revision.
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149 - The difference between the number of columns (ongoing edges)
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parents: 7324
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150 in the next revision and the number of columns (ongoing edges)
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diff changeset
151 in the current revision. That is: -1 means one column removed;
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152 0 means no columns added or removed; 1 means one column added.
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153 """
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154 prev_n_columns_diff = 0
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155 prev_node_index = 0
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diff changeset
156 for (node_ch, node_lines, node_index, edges, n_columns, n_columns_diff) in grapher:
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157
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diff changeset
158 assert -2 < n_columns_diff < 2
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159 if n_columns_diff == -1:
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160 # Transform
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161 #
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162 # | | | | | |
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parents:
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163 # o | | into o---+
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parents:
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164 # |X / |/ /
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parents:
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165 # | | | |
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parents:
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166 fix_long_right_edges(edges)
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parents:
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167
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168 # add_padding_line says whether to rewrite
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parents:
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169 #
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170 # | | | | | | | |
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parents:
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171 # | o---+ into | o---+
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parents:
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172 # | / / | | | # <--- padding line
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parents:
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173 # o | | | / /
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174 # o | |
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175 add_padding_line = (len(node_lines) > 2 and
4633
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176 n_columns_diff == -1 and
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177 [x for (x, y) in edges if x + 1 < y])
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178
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179 # fix_nodeline_tail says whether to rewrite
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180 #
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181 # | | o | | | | o | |
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182 # | | |/ / | | |/ /
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183 # | o | | into | o / / # <--- fixed nodeline tail
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parents:
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184 # | |/ / | |/ /
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185 # o | | o | |
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186 fix_nodeline_tail = len(node_lines) <= 2 and not add_padding_line
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187
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188 # nodeline is the line containing the node character (typically o)
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189 nodeline = ["|", " "] * node_index
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190 nodeline.extend([node_ch, " "])
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191
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192 nodeline.extend(
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193 get_nodeline_edges_tail(
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194 node_index, prev_node_index, n_columns, n_columns_diff,
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195 prev_n_columns_diff, fix_nodeline_tail))
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196
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197 # shift_interline is the line containing the non-vertical
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198 # edges between this entry and the next
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199 shift_interline = ["|", " "] * node_index
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200 if n_columns_diff == -1:
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201 n_spaces = 1
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202 edge_ch = "/"
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203 elif n_columns_diff == 0:
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204 n_spaces = 2
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205 edge_ch = "|"
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parents:
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206 else:
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207 n_spaces = 3
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208 edge_ch = "\\"
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diff changeset
209 shift_interline.extend(n_spaces * [" "])
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210 shift_interline.extend([edge_ch, " "] * (n_columns - node_index - 1))
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211
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212 # draw edges from the current node to its parents
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213 draw_edges(edges, nodeline, shift_interline)
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diff changeset
214
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215 # lines is the list of all graph lines to print
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216 lines = [nodeline]
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parents:
diff changeset
217 if add_padding_line:
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diff changeset
218 lines.append(get_padding_line(node_index, n_columns, edges))
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diff changeset
219 lines.append(shift_interline)
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diff changeset
220
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221 # make sure that there are as many graph lines as there are
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diff changeset
222 # log strings
7324
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diff changeset
223 while len(node_lines) < len(lines):
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diff changeset
224 node_lines.append("")
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diff changeset
225 if len(lines) < len(node_lines):
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226 extra_interline = ["|", " "] * (n_columns + n_columns_diff)
7324
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diff changeset
227 while len(lines) < len(node_lines):
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228 lines.append(extra_interline)
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diff changeset
229
7323
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230 # print lines
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diff changeset
231 indentation_level = max(n_columns, n_columns + n_columns_diff)
7324
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diff changeset
232 for (line, logstr) in zip(lines, node_lines):
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233 ln = "%-*s %s" % (2 * indentation_level, "".join(line), logstr)
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diff changeset
234 ui.write(ln.rstrip() + '\n')
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235
7323
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236 # ... and start over
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diff changeset
237 prev_node_index = node_index
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diff changeset
238 prev_n_columns_diff = n_columns_diff
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parents:
diff changeset
239
7326
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diff changeset
240 def get_limit(limit_opt):
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diff changeset
241 if limit_opt:
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diff changeset
242 try:
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diff changeset
243 limit = int(limit_opt)
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diff changeset
244 except ValueError:
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diff changeset
245 raise Abort(_("limit must be a positive integer"))
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diff changeset
246 if limit <= 0:
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diff changeset
247 raise Abort(_("limit must be positive"))
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diff changeset
248 else:
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diff changeset
249 limit = sys.maxint
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Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
250 return limit
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Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
251
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diff changeset
252 def get_revs(repo, rev_opt):
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diff changeset
253 if rev_opt:
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parents: 7325
diff changeset
254 revs = revrange(repo, rev_opt)
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parents: 7325
diff changeset
255 return (max(revs), min(revs))
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diff changeset
256 else:
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Dirkjan Ochtman <dirkjan@ochtman.nl>
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diff changeset
257 return (len(repo) - 1, 0)
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diff changeset
258
7325
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diff changeset
259 def graphlog(ui, repo, path=None, **opts):
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diff changeset
260 """show revision history alongside an ASCII revision graph
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diff changeset
261
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
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parents: 7324
diff changeset
262 Print a revision history alongside a revision graph drawn with
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
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diff changeset
263 ASCII characters.
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7324
diff changeset
264
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
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parents: 7324
diff changeset
265 Nodes printed as an @ character are parents of the working
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
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parents: 7324
diff changeset
266 directory.
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7324
diff changeset
267 """
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diff changeset
268
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diff changeset
269 limit = get_limit(opts["limit"])
7370
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diff changeset
270 start, stop = get_revs(repo, opts["rev"])
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diff changeset
271 stop = max(stop, start - limit + 1)
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diff changeset
272 if start == nullrev:
7325
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diff changeset
273 return
7370
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diff changeset
274
7325
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diff changeset
275 if path:
f9985108d4e4 graphlog: split the actual DAG grapher out into a separate method
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diff changeset
276 path = canonpath(repo.root, os.getcwd(), path)
7370
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diff changeset
277 if path: # could be reset in canonpath
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diff changeset
278 revdag = filerevs(repo, path, start, stop)
7325
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diff changeset
279 else:
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diff changeset
280 revdag = revisions(repo, start, stop)
7325
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281
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282 repo_parents = repo.dirstate.parents()
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283 displayer = show_changeset(ui, repo, opts, buffered=True)
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284 def graphabledag():
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285 for (ctx, parents) in revdag:
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286 # log_strings is the list of all log strings to draw alongside
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287 # the graph.
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288 displayer.show(ctx)
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289 lines = displayer.hunk.pop(ctx.rev()).split("\n")[:-1]
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290 char = ctx.node() in repo_parents and '@' or 'o'
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291 yield (ctx.rev(), parents, char, lines)
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292
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293 ascii(ui, grapher(graphabledag()))
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294
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295 cmdtable = {
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296 "glog":
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297 (graphlog,
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298 [('l', 'limit', '', _('limit number of changes displayed')),
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299 ('p', 'patch', False, _('show patch')),
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300 ('r', 'rev', [], _('show the specified revision or range')),
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301 ] + templateopts,
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302 _('hg glog [OPTION]... [FILE]')),
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303 }