Mercurial > hg
annotate mercurial/commit.py @ 45249:b3040b6739ce
commitctx: extract copy information encoding into extra into commit.py
The encoding of copy information into extra has multiple subcases and become
quite complicated (eg: empty list can be explicitly or implicitly stored for
example). In addition, it is niche experimental feature since as it affect the
hash, it is only suitable for user who don't mercurial for storage server side
(ie: Google).
Having this complexity part of the changelog will get in the way of further
cleanup. We could have to either move more of that logic into the changelog or
to move or extract more of the logic at the higher level. We take the second
approach and start gather logic in dedicated function in commit.py.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sat, 25 Jul 2020 15:13:25 +0200 |
parents | 4cde23ba076e |
children | efe8a67793b6 |
rev | line source |
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1 # commit.py - fonction to perform commit |
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2 # |
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3 # This software may be used and distributed according to the terms of the |
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4 # GNU General Public License version 2 or any later version. |
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5 |
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6 from __future__ import absolute_import |
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7 |
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8 import errno |
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9 |
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10 from .i18n import _ |
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11 from .node import ( |
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12 hex, |
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13 nullid, |
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14 nullrev, |
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15 ) |
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16 |
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17 from . import ( |
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18 context, |
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19 mergestate, |
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20 metadata, |
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21 phases, |
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22 scmutil, |
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23 subrepoutil, |
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24 ) |
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25 |
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26 |
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27 def _write_copy_meta(repo): |
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28 """return a (changelog, filelog) boolean tuple |
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29 |
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30 changelog: copy related information should be stored in the changeset |
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31 filelof: copy related information should be written in the file revision |
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32 """ |
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33 if repo.filecopiesmode == b'changeset-sidedata': |
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34 writechangesetcopy = True |
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35 writefilecopymeta = True |
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36 else: |
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37 writecopiesto = repo.ui.config(b'experimental', b'copies.write-to') |
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38 writefilecopymeta = writecopiesto != b'changeset-only' |
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39 writechangesetcopy = writecopiesto in ( |
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40 b'changeset-only', |
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41 b'compatibility', |
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42 ) |
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43 return writechangesetcopy, writefilecopymeta |
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44 |
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45 |
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46 def commitctx(repo, ctx, error=False, origctx=None): |
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47 """Add a new revision to the target repository. |
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48 Revision information is passed via the context argument. |
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49 |
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50 ctx.files() should list all files involved in this commit, i.e. |
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51 modified/added/removed files. On merge, it may be wider than the |
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52 ctx.files() to be committed, since any file nodes derived directly |
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53 from p1 or p2 are excluded from the committed ctx.files(). |
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54 |
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55 origctx is for convert to work around the problem that bug |
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56 fixes to the files list in changesets change hashes. For |
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57 convert to be the identity, it can pass an origctx and this |
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58 function will use the same files list when it makes sense to |
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59 do so. |
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60 """ |
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61 repo = repo.unfiltered() |
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62 |
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63 p1, p2 = ctx.p1(), ctx.p2() |
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64 user = ctx.user() |
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65 |
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66 with repo.lock(), repo.transaction(b"commit") as tr: |
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67 r = _prepare_files(tr, ctx, error=error, origctx=origctx) |
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68 mn, files, p1copies, p2copies, filesadded, filesremoved = r |
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69 |
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70 extra = ctx.extra().copy() |
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71 |
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72 files = sorted(files) |
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73 if extra is not None: |
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74 for name in ( |
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75 b'p1copies', |
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76 b'p2copies', |
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77 b'filesadded', |
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78 b'filesremoved', |
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79 ): |
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80 extra.pop(name, None) |
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81 if repo.changelog._copiesstorage == b'extra': |
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82 extra = _extra_with_copies( |
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83 repo, extra, files, p1copies, p2copies, filesadded, filesremoved |
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84 ) |
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85 |
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86 # update changelog |
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87 repo.ui.note(_(b"committing changelog\n")) |
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88 repo.changelog.delayupdate(tr) |
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89 n = repo.changelog.add( |
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90 mn, |
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91 files, |
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92 ctx.description(), |
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93 tr, |
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94 p1.node(), |
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95 p2.node(), |
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96 user, |
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97 ctx.date(), |
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98 extra, |
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99 p1copies, |
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100 p2copies, |
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101 filesadded, |
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102 filesremoved, |
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103 ) |
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104 xp1, xp2 = p1.hex(), p2 and p2.hex() or b'' |
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105 repo.hook( |
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106 b'pretxncommit', throw=True, node=hex(n), parent1=xp1, parent2=xp2, |
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107 ) |
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108 # set the new commit is proper phase |
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109 targetphase = subrepoutil.newcommitphase(repo.ui, ctx) |
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110 if targetphase: |
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111 # retract boundary do not alter parent changeset. |
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112 # if a parent have higher the resulting phase will |
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113 # be compliant anyway |
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114 # |
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115 # if minimal phase was 0 we don't need to retract anything |
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116 phases.registernew(repo, tr, targetphase, [n]) |
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117 return n |
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118 |
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119 |
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120 def _prepare_files(tr, ctx, error=False, origctx=None): |
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121 repo = ctx.repo() |
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122 p1 = ctx.p1() |
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123 |
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124 writechangesetcopy, writefilecopymeta = _write_copy_meta(repo) |
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125 |
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126 p1copies, p2copies = None, None |
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127 if writechangesetcopy: |
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128 p1copies = ctx.p1copies() |
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129 p2copies = ctx.p2copies() |
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130 filesadded, filesremoved = None, None |
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131 if ctx.manifestnode(): |
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132 # reuse an existing manifest revision |
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133 repo.ui.debug(b'reusing known manifest\n') |
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134 mn = ctx.manifestnode() |
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135 files = ctx.files() |
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136 if writechangesetcopy: |
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137 filesadded = ctx.filesadded() |
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138 filesremoved = ctx.filesremoved() |
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139 elif not ctx.files(): |
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140 repo.ui.debug(b'reusing manifest from p1 (no file change)\n') |
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141 mn = p1.manifestnode() |
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142 files = [] |
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143 else: |
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144 mn, files, added, removed = _process_files(tr, ctx, error=error) |
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145 if writechangesetcopy: |
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146 filesremoved = removed |
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147 filesadded = added |
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148 |
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149 if origctx and origctx.manifestnode() == mn: |
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150 files = origctx.files() |
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151 |
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152 if not writefilecopymeta: |
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153 # If writing only to changeset extras, use None to indicate that |
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154 # no entry should be written. If writing to both, write an empty |
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155 # entry to prevent the reader from falling back to reading |
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156 # filelogs. |
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157 p1copies = p1copies or None |
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158 p2copies = p2copies or None |
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159 filesadded = filesadded or None |
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160 filesremoved = filesremoved or None |
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161 |
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162 return mn, files, p1copies, p2copies, filesadded, filesremoved |
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163 |
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164 |
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165 def _process_files(tr, ctx, error=False): |
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166 repo = ctx.repo() |
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167 p1 = ctx.p1() |
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168 p2 = ctx.p2() |
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169 |
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170 writechangesetcopy, writefilecopymeta = _write_copy_meta(repo) |
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171 |
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172 m1ctx = p1.manifestctx() |
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173 m2ctx = p2.manifestctx() |
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174 mctx = m1ctx.copy() |
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175 |
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176 m = mctx.read() |
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177 m1 = m1ctx.read() |
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178 m2 = m2ctx.read() |
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179 |
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180 # check in files |
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181 added = [] |
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182 filesadded = [] |
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183 removed = list(ctx.removed()) |
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184 touched = [] |
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185 linkrev = len(repo) |
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186 repo.ui.note(_(b"committing files:\n")) |
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187 uipathfn = scmutil.getuipathfn(repo) |
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188 for f in sorted(ctx.modified() + ctx.added()): |
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189 repo.ui.note(uipathfn(f) + b"\n") |
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190 try: |
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191 fctx = ctx[f] |
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192 if fctx is None: |
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193 removed.append(f) |
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194 else: |
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195 added.append(f) |
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196 m[f], is_touched = _filecommit( |
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197 repo, fctx, m1, m2, linkrev, tr, writefilecopymeta, |
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198 ) |
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199 if is_touched: |
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200 touched.append(f) |
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201 if is_touched == 'added': |
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202 filesadded.append(f) |
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203 m.setflag(f, fctx.flags()) |
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204 except OSError: |
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205 repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f)) |
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206 raise |
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207 except IOError as inst: |
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208 errcode = getattr(inst, 'errno', errno.ENOENT) |
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209 if error or errcode and errcode != errno.ENOENT: |
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210 repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f)) |
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211 raise |
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212 |
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213 # update manifest |
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214 removed = [f for f in removed if f in m1 or f in m2] |
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215 drop = sorted([f for f in removed if f in m]) |
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216 for f in drop: |
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217 del m[f] |
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218 if p2.rev() != nullrev: |
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219 rf = metadata.get_removal_filter(ctx, (p1, p2, m1, m2)) |
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220 removed = [f for f in removed if not rf(f)] |
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221 |
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222 touched.extend(removed) |
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223 |
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224 files = touched |
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225 mn = _commit_manifest(tr, linkrev, ctx, mctx, m, files, added, drop) |
45236
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226 |
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227 return mn, files, filesadded, removed |
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228 |
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229 |
45204
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230 def _filecommit( |
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231 repo, fctx, manifest1, manifest2, linkrev, tr, includecopymeta, |
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232 ): |
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233 """ |
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234 commit an individual file as part of a larger transaction |
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235 |
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236 input: |
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237 |
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238 fctx: a file context with the content we are trying to commit |
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239 manifest1: manifest of changeset first parent |
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240 manifest2: manifest of changeset second parent |
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241 linkrev: revision number of the changeset being created |
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242 tr: current transation |
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243 individual: boolean, set to False to skip storing the copy data |
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244 (only used by the Google specific feature of using |
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245 changeset extra as copy source of truth). |
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246 |
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247 output: (filenode, touched) |
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248 |
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249 filenode: the filenode that should be used by this changeset |
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250 touched: one of: None (mean untouched), 'added' or 'modified' |
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251 """ |
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252 |
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253 fname = fctx.path() |
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254 fparent1 = manifest1.get(fname, nullid) |
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255 fparent2 = manifest2.get(fname, nullid) |
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256 touched = None |
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257 if fparent1 == fparent2 == nullid: |
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258 touched = 'added' |
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259 |
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260 if isinstance(fctx, context.filectx): |
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261 # This block fast path most comparisons which are usually done. It |
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262 # assumes that bare filectx is used and no merge happened, hence no |
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263 # need to create a new file revision in this case. |
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264 node = fctx.filenode() |
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265 if node in [fparent1, fparent2]: |
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266 repo.ui.debug(b'reusing %s filelog entry\n' % fname) |
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267 if ( |
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268 fparent1 != nullid and manifest1.flags(fname) != fctx.flags() |
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269 ) or ( |
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270 fparent2 != nullid and manifest2.flags(fname) != fctx.flags() |
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271 ): |
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272 touched = 'modified' |
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273 return node, touched |
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274 |
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275 flog = repo.file(fname) |
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276 meta = {} |
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277 cfname = fctx.copysource() |
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278 fnode = None |
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279 |
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280 if cfname and cfname != fname: |
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281 # Mark the new revision of this file as a copy of another |
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282 # file. This copy data will effectively act as a parent |
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283 # of this new revision. If this is a merge, the first |
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284 # parent will be the nullid (meaning "look up the copy data") |
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285 # and the second one will be the other parent. For example: |
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286 # |
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287 # 0 --- 1 --- 3 rev1 changes file foo |
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288 # \ / rev2 renames foo to bar and changes it |
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289 # \- 2 -/ rev3 should have bar with all changes and |
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290 # should record that bar descends from |
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291 # bar in rev2 and foo in rev1 |
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292 # |
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293 # this allows this merge to succeed: |
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294 # |
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295 # 0 --- 1 --- 3 rev4 reverts the content change from rev2 |
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296 # \ / merging rev3 and rev4 should use bar@rev2 |
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297 # \- 2 --- 4 as the merge base |
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298 # |
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299 |
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300 cnode = manifest1.get(cfname) |
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301 newfparent = fparent2 |
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302 |
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303 if manifest2: # branch merge |
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304 if fparent2 == nullid or cnode is None: # copied on remote side |
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305 if cfname in manifest2: |
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306 cnode = manifest2[cfname] |
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307 newfparent = fparent1 |
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308 |
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309 # Here, we used to search backwards through history to try to find |
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310 # where the file copy came from if the source of a copy was not in |
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311 # the parent directory. However, this doesn't actually make sense to |
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312 # do (what does a copy from something not in your working copy even |
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313 # mean?) and it causes bugs (eg, issue4476). Instead, we will warn |
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314 # the user that copy information was dropped, so if they didn't |
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315 # expect this outcome it can be fixed, but this is the correct |
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316 # behavior in this circumstance. |
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317 |
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318 if cnode: |
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319 repo.ui.debug(b" %s: copy %s:%s\n" % (fname, cfname, hex(cnode))) |
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320 if includecopymeta: |
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321 meta[b"copy"] = cfname |
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322 meta[b"copyrev"] = hex(cnode) |
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323 fparent1, fparent2 = nullid, newfparent |
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324 else: |
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325 repo.ui.warn( |
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326 _( |
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327 b"warning: can't find ancestor for '%s' " |
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328 b"copied from '%s'!\n" |
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329 ) |
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330 % (fname, cfname) |
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331 ) |
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332 |
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333 elif fparent1 == nullid: |
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334 fparent1, fparent2 = fparent2, nullid |
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335 elif fparent2 != nullid: |
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336 # is one parent an ancestor of the other? |
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337 fparentancestors = flog.commonancestorsheads(fparent1, fparent2) |
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338 if fparent1 in fparentancestors: |
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339 fparent1, fparent2 = fparent2, nullid |
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340 elif fparent2 in fparentancestors: |
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341 fparent2 = nullid |
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342 elif not fparentancestors: |
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343 # TODO: this whole if-else might be simplified much more |
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344 ms = mergestate.mergestate.read(repo) |
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345 if ( |
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346 fname in ms |
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347 and ms[fname] == mergestate.MERGE_RECORD_MERGED_OTHER |
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348 ): |
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349 fparent1, fparent2 = fparent2, nullid |
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350 |
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351 # is the file changed? |
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352 text = fctx.data() |
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353 if fparent2 != nullid or meta or flog.cmp(fparent1, text): |
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354 if touched is None: # do not overwrite added |
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355 touched = 'modified' |
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356 fnode = flog.add(text, meta, tr, linkrev, fparent1, fparent2) |
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357 # are just the flags changed during merge? |
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358 elif fname in manifest1 and manifest1.flags(fname) != fctx.flags(): |
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359 touched = 'modified' |
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360 fnode = fparent1 |
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361 else: |
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362 fnode = fparent1 |
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363 return fnode, touched |
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364 |
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365 |
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366 def _commit_manifest(tr, linkrev, ctx, mctx, manifest, files, added, drop): |
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367 """make a new manifest entry (or reuse a new one) |
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368 |
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369 given an initialised manifest context and precomputed list of |
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370 - files: files affected by the commit |
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371 - added: new entries in the manifest |
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372 - drop: entries present in parents but absent of this one |
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373 |
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374 Create a new manifest revision, reuse existing ones if possible. |
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375 |
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376 Return the nodeid of the manifest revision. |
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377 """ |
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378 repo = ctx.repo() |
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379 |
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380 md = None |
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381 |
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382 # all this is cached, so it is find to get them all from the ctx. |
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383 p1 = ctx.p1() |
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384 p2 = ctx.p2() |
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385 m1ctx = p1.manifestctx() |
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386 |
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387 m1 = m1ctx.read() |
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388 |
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389 if not files: |
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390 # if no "files" actually changed in terms of the changelog, |
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391 # try hard to detect unmodified manifest entry so that the |
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392 # exact same commit can be reproduced later on convert. |
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393 md = m1.diff(manifest, scmutil.matchfiles(repo, ctx.files())) |
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394 if not files and md: |
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395 repo.ui.debug( |
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396 b'not reusing manifest (no file change in ' |
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397 b'changelog, but manifest differs)\n' |
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398 ) |
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399 if files or md: |
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400 repo.ui.note(_(b"committing manifest\n")) |
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401 # we're using narrowmatch here since it's already applied at |
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402 # other stages (such as dirstate.walk), so we're already |
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403 # ignoring things outside of narrowspec in most cases. The |
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404 # one case where we might have files outside the narrowspec |
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405 # at this point is merges, and we already error out in the |
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406 # case where the merge has files outside of the narrowspec, |
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407 # so this is safe. |
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408 mn = mctx.write( |
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409 tr, |
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410 linkrev, |
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411 p1.manifestnode(), |
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412 p2.manifestnode(), |
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413 added, |
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414 drop, |
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415 match=repo.narrowmatch(), |
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416 ) |
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417 else: |
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418 repo.ui.debug( |
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419 b'reusing manifest from p1 (listed files ' b'actually unchanged)\n' |
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420 ) |
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421 mn = p1.manifestnode() |
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422 |
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423 return mn |
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424 |
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425 |
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426 def _extra_with_copies( |
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427 repo, extra, files, p1copies, p2copies, filesadded, filesremoved |
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428 ): |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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429 """encode copy information into a `extra` dictionnary""" |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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430 extrasentries = p1copies, p2copies, filesadded, filesremoved |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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431 if extra is None and any(x is not None for x in extrasentries): |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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432 extra = {} |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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433 if p1copies is not None: |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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434 p1copies = metadata.encodecopies(files, p1copies) |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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435 extra[b'p1copies'] = p1copies |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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436 if p2copies is not None: |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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437 p2copies = metadata.encodecopies(files, p2copies) |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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438 extra[b'p2copies'] = p2copies |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
45248
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439 if filesadded is not None: |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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440 filesadded = metadata.encodefileindices(files, filesadded) |
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441 extra[b'filesadded'] = filesadded |
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442 if filesremoved is not None: |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
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443 filesremoved = metadata.encodefileindices(files, filesremoved) |
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444 extra[b'filesremoved'] = filesremoved |
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commitctx: extract copy information encoding into extra into commit.py
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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445 return extra |