Mercurial > hg
annotate mercurial/treediscovery.py @ 45537:2f8227a12592
rhg: add `--revision` argument to `rhg files`
Add the option to list the tracked files of a revision given its number
or full node id.
Benched on a clone of moz-central
where tip is 1671467:81deaa1a68ebb28db0490954034ab38ab269409d
files -r 81deaa1a68ebb28db0490954034ab38ab269409d > out.txt
hg 0m1.633s
rhg 0m0.157s
files -r 81deaa1a68ebb28db0490954034ab38ab269409d > /dev/null
hg 0m0.415s
rhg 0m0.143s
Differential Revision: https://phab.mercurial-scm.org/D9015
author | Antoine Cezar <antoine.cezar@octobus.net> |
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date | Wed, 09 Sep 2020 14:53:15 +0200 |
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children | 89a2afe31e82 |
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1 # discovery.py - protocol changeset discovery functions |
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2 # |
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3 # Copyright 2010 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 from __future__ import absolute_import |
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9 |
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10 import collections |
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11 |
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12 from .i18n import _ |
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13 from .node import ( |
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14 nullid, |
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15 short, |
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16 ) |
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17 from . import ( |
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18 error, |
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19 pycompat, |
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20 ) |
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21 |
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22 |
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23 def findcommonincoming(repo, remote, heads=None, force=False): |
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24 """Return a tuple (common, fetch, heads) used to identify the common |
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25 subset of nodes between repo and remote. |
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26 |
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27 "common" is a list of (at least) the heads of the common subset. |
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28 "fetch" is a list of roots of the nodes that would be incoming, to be |
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29 supplied to changegroupsubset. |
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30 "heads" is either the supplied heads, or else the remote's heads. |
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31 """ |
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32 |
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33 knownnode = repo.changelog.hasnode |
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34 search = [] |
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35 fetch = set() |
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36 seen = set() |
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37 seenbranch = set() |
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38 base = set() |
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39 |
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40 if not heads: |
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41 with remote.commandexecutor() as e: |
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42 heads = e.callcommand(b'heads', {}).result() |
343 | 43 |
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44 if repo.changelog.tip() == nullid: |
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45 base.add(nullid) |
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46 if heads != [nullid]: |
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47 return [nullid], [nullid], list(heads) |
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48 return [nullid], [], heads |
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49 |
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50 # assume we're closer to the tip than the root |
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51 # and start by examining the heads |
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52 repo.ui.status(_(b"searching for changes\n")) |
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53 |
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54 unknown = [] |
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55 for h in heads: |
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56 if not knownnode(h): |
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57 unknown.append(h) |
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58 else: |
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59 base.add(h) |
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60 |
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61 if not unknown: |
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62 return list(base), [], list(heads) |
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63 |
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64 req = set(unknown) |
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65 reqcnt = 0 |
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66 progress = repo.ui.makeprogress(_(b'searching'), unit=_(b'queries')) |
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67 |
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68 # search through remote branches |
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69 # a 'branch' here is a linear segment of history, with four parts: |
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70 # head, root, first parent, second parent |
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71 # (a branch always has two parents (or none) by definition) |
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72 with remote.commandexecutor() as e: |
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73 branches = e.callcommand(b'branches', {b'nodes': unknown}).result() |
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74 |
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75 unknown = collections.deque(branches) |
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76 while unknown: |
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77 r = [] |
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78 while unknown: |
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79 n = unknown.popleft() |
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80 if n[0] in seen: |
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81 continue |
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82 |
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83 repo.ui.debug(b"examining %s:%s\n" % (short(n[0]), short(n[1]))) |
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84 if n[0] == nullid: # found the end of the branch |
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85 pass |
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86 elif n in seenbranch: |
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87 repo.ui.debug(b"branch already found\n") |
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88 continue |
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89 elif n[1] and knownnode(n[1]): # do we know the base? |
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90 repo.ui.debug( |
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91 b"found incomplete branch %s:%s\n" |
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92 % (short(n[0]), short(n[1])) |
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93 ) |
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94 search.append(n[0:2]) # schedule branch range for scanning |
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95 seenbranch.add(n) |
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96 else: |
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97 if n[1] not in seen and n[1] not in fetch: |
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98 if knownnode(n[2]) and knownnode(n[3]): |
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99 repo.ui.debug(b"found new changeset %s\n" % short(n[1])) |
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100 fetch.add(n[1]) # earliest unknown |
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101 for p in n[2:4]: |
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102 if knownnode(p): |
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103 base.add(p) # latest known |
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104 |
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105 for p in n[2:4]: |
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106 if p not in req and not knownnode(p): |
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107 r.append(p) |
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108 req.add(p) |
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109 seen.add(n[0]) |
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110 |
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111 if r: |
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112 reqcnt += 1 |
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113 progress.increment() |
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114 repo.ui.debug( |
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115 b"request %d: %s\n" % (reqcnt, b" ".join(map(short, r))) |
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116 ) |
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117 for p in pycompat.xrange(0, len(r), 10): |
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118 with remote.commandexecutor() as e: |
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119 branches = e.callcommand( |
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120 b'branches', {b'nodes': r[p : p + 10],} |
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121 ).result() |
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122 |
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123 for b in branches: |
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124 repo.ui.debug( |
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125 b"received %s:%s\n" % (short(b[0]), short(b[1])) |
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126 ) |
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127 unknown.append(b) |
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128 |
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129 # do binary search on the branches we found |
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130 while search: |
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131 newsearch = [] |
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132 reqcnt += 1 |
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133 progress.increment() |
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134 |
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135 with remote.commandexecutor() as e: |
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136 between = e.callcommand(b'between', {b'pairs': search}).result() |
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137 |
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138 for n, l in zip(search, between): |
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139 l.append(n[1]) |
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140 p = n[0] |
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141 f = 1 |
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142 for i in l: |
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143 repo.ui.debug(b"narrowing %d:%d %s\n" % (f, len(l), short(i))) |
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144 if knownnode(i): |
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145 if f <= 2: |
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146 repo.ui.debug( |
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147 b"found new branch changeset %s\n" % short(p) |
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148 ) |
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149 fetch.add(p) |
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150 base.add(i) |
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151 else: |
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152 repo.ui.debug( |
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153 b"narrowed branch search to %s:%s\n" |
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154 % (short(p), short(i)) |
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155 ) |
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156 newsearch.append((p, i)) |
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157 break |
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158 p, f = i, f * 2 |
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159 search = newsearch |
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160 |
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161 # sanity check our fetch list |
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162 for f in fetch: |
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163 if knownnode(f): |
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164 raise error.RepoError(_(b"already have changeset ") + short(f[:4])) |
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165 |
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166 base = list(base) |
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167 if base == [nullid]: |
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168 if force: |
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169 repo.ui.warn(_(b"warning: repository is unrelated\n")) |
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170 else: |
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171 raise error.Abort(_(b"repository is unrelated")) |
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172 |
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173 repo.ui.debug( |
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174 b"found new changesets starting at " |
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175 + b" ".join([short(f) for f in fetch]) |
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176 + b"\n" |
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177 ) |
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178 |
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179 progress.complete() |
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180 repo.ui.debug(b"%d total queries\n" % reqcnt) |
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181 |
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182 return base, list(fetch), heads |