Mercurial > hg
annotate mercurial/commit.py @ 45239:13814622b3b1
commitctx: extract all the file preparation logic in a new function
Before we actually start to create a new commit we have a large block of logic
that do the necessary file and manifest commit and that determine which files
are been affected by the commit (and how).
This is a complex process on its own. It return a "simple" output that can be
fed to the next step. The output itself is not that simple as we return a lot of
individual items (files, added, removed, ...). My next step (and actual goal for
this cleanup) will be to simplify the return by returning a richer object that
will be more suited for the variation of data we want to store.
After this changeset the `commitctx` is a collection of smaller function with
limited scope. The largest one is still `_filecommit` without about 100 lines of
code.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 23 Jul 2020 23:52:31 +0200 |
parents | bd7515273fd6 |
children | e15416c95b25 |
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 # update changelog |
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71 repo.ui.note(_(b"committing changelog\n")) |
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72 repo.changelog.delayupdate(tr) |
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73 n = repo.changelog.add( |
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74 mn, |
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75 files, |
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76 ctx.description(), |
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77 tr, |
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78 p1.node(), |
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79 p2.node(), |
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80 user, |
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81 ctx.date(), |
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82 ctx.extra().copy(), |
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83 p1copies, |
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84 p2copies, |
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85 filesadded, |
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86 filesremoved, |
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87 ) |
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88 xp1, xp2 = p1.hex(), p2 and p2.hex() or b'' |
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89 repo.hook( |
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90 b'pretxncommit', throw=True, node=hex(n), parent1=xp1, parent2=xp2, |
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91 ) |
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92 # set the new commit is proper phase |
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93 targetphase = subrepoutil.newcommitphase(repo.ui, ctx) |
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94 if targetphase: |
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95 # retract boundary do not alter parent changeset. |
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96 # if a parent have higher the resulting phase will |
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97 # be compliant anyway |
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98 # |
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99 # if minimal phase was 0 we don't need to retract anything |
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100 phases.registernew(repo, tr, targetphase, [n]) |
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101 return n |
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102 |
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103 |
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104 def _prepare_files(tr, ctx, error=False, origctx=None): |
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105 repo = ctx.repo() |
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106 p1 = ctx.p1() |
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107 |
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108 writechangesetcopy, writefilecopymeta = _write_copy_meta(repo) |
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109 |
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110 p1copies, p2copies = None, None |
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111 if writechangesetcopy: |
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112 p1copies = ctx.p1copies() |
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113 p2copies = ctx.p2copies() |
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114 filesadded, filesremoved = None, None |
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115 if ctx.manifestnode(): |
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116 # reuse an existing manifest revision |
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117 repo.ui.debug(b'reusing known manifest\n') |
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118 mn = ctx.manifestnode() |
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119 files = ctx.files() |
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120 if writechangesetcopy: |
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121 filesadded = ctx.filesadded() |
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122 filesremoved = ctx.filesremoved() |
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123 elif not ctx.files(): |
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124 repo.ui.debug(b'reusing manifest from p1 (no file change)\n') |
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125 mn = p1.manifestnode() |
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126 files = [] |
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127 else: |
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128 mn, files, added, removed = _process_files(tr, ctx, error=error) |
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129 if writechangesetcopy: |
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130 filesremoved = removed |
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131 filesadded = added |
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132 |
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133 if origctx and origctx.manifestnode() == mn: |
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134 files = origctx.files() |
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135 |
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136 if not writefilecopymeta: |
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137 # If writing only to changeset extras, use None to indicate that |
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138 # no entry should be written. If writing to both, write an empty |
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139 # entry to prevent the reader from falling back to reading |
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140 # filelogs. |
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141 p1copies = p1copies or None |
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142 p2copies = p2copies or None |
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143 filesadded = filesadded or None |
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144 filesremoved = filesremoved or None |
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145 |
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146 return mn, files, p1copies, p2copies, filesadded, filesremoved |
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147 |
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148 |
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149 def _process_files(tr, ctx, error=False): |
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150 repo = ctx.repo() |
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151 p1 = ctx.p1() |
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152 p2 = ctx.p2() |
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153 |
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154 writechangesetcopy, writefilecopymeta = _write_copy_meta(repo) |
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155 |
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156 m1ctx = p1.manifestctx() |
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157 m2ctx = p2.manifestctx() |
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158 mctx = m1ctx.copy() |
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159 |
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160 m = mctx.read() |
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161 m1 = m1ctx.read() |
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162 m2 = m2ctx.read() |
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163 |
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164 # check in files |
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165 added = [] |
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166 filesadded = [] |
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167 removed = list(ctx.removed()) |
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168 touched = [] |
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169 linkrev = len(repo) |
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170 repo.ui.note(_(b"committing files:\n")) |
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171 uipathfn = scmutil.getuipathfn(repo) |
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172 for f in sorted(ctx.modified() + ctx.added()): |
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173 repo.ui.note(uipathfn(f) + b"\n") |
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174 try: |
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175 fctx = ctx[f] |
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176 if fctx is None: |
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177 removed.append(f) |
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178 else: |
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179 added.append(f) |
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180 m[f], is_touched = _filecommit( |
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181 repo, fctx, m1, m2, linkrev, tr, writefilecopymeta, |
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182 ) |
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183 if is_touched: |
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184 touched.append(f) |
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185 if is_touched == 'added': |
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186 filesadded.append(f) |
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187 m.setflag(f, fctx.flags()) |
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188 except OSError: |
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189 repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f)) |
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190 raise |
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191 except IOError as inst: |
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192 errcode = getattr(inst, 'errno', errno.ENOENT) |
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193 if error or errcode and errcode != errno.ENOENT: |
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194 repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f)) |
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195 raise |
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196 |
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197 # update manifest |
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198 removed = [f for f in removed if f in m1 or f in m2] |
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199 drop = sorted([f for f in removed if f in m]) |
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200 for f in drop: |
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201 del m[f] |
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202 if p2.rev() != nullrev: |
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203 rf = metadata.get_removal_filter(ctx, (p1, p2, m1, m2)) |
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204 removed = [f for f in removed if not rf(f)] |
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205 |
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206 touched.extend(removed) |
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207 |
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208 files = touched |
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209 mn = _commit_manifest(tr, linkrev, ctx, mctx, files, added, drop) |
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210 |
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211 return mn, files, filesadded, removed |
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212 |
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213 |
45204
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214 def _filecommit( |
ce9ee81df9ff
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|
215 repo, fctx, manifest1, manifest2, linkrev, tr, includecopymeta, |
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parents:
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diff
changeset
|
216 ): |
ce9ee81df9ff
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parents:
45203
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|
217 """ |
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218 commit an individual file as part of a larger transaction |
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219 |
ce9ee81df9ff
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parents:
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diff
changeset
|
220 input: |
ce9ee81df9ff
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parents:
45203
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changeset
|
221 |
ce9ee81df9ff
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222 fctx: a file context with the content we are trying to commit |
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parents:
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diff
changeset
|
223 manifest1: manifest of changeset first parent |
ce9ee81df9ff
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parents:
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diff
changeset
|
224 manifest2: manifest of changeset second parent |
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parents:
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diff
changeset
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225 linkrev: revision number of the changeset being created |
ce9ee81df9ff
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parents:
45203
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226 tr: current transation |
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227 individual: boolean, set to False to skip storing the copy data |
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parents:
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|
228 (only used by the Google specific feature of using |
ce9ee81df9ff
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parents:
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changeset
|
229 changeset extra as copy source of truth). |
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|
230 |
ce9ee81df9ff
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parents:
45203
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changeset
|
231 output: (filenode, touched) |
ce9ee81df9ff
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|
232 |
ce9ee81df9ff
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233 filenode: the filenode that should be used by this changeset |
45223
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commitctx: document the None return for "touched" value
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234 touched: one of: None (mean untouched), 'added' or 'modified' |
45204
ce9ee81df9ff
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parents:
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diff
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|
235 """ |
ce9ee81df9ff
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parents:
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|
236 |
ce9ee81df9ff
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237 fname = fctx.path() |
ce9ee81df9ff
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238 fparent1 = manifest1.get(fname, nullid) |
ce9ee81df9ff
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parents:
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239 fparent2 = manifest2.get(fname, nullid) |
ce9ee81df9ff
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parents:
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240 touched = None |
ce9ee81df9ff
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parents:
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|
241 if fparent1 == fparent2 == nullid: |
ce9ee81df9ff
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parents:
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242 touched = 'added' |
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|
243 |
ce9ee81df9ff
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244 if isinstance(fctx, context.filectx): |
ce9ee81df9ff
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245 # This block fast path most comparisons which are usually done. It |
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246 # assumes that bare filectx is used and no merge happened, hence no |
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247 # need to create a new file revision in this case. |
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248 node = fctx.filenode() |
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parents:
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249 if node in [fparent1, fparent2]: |
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250 repo.ui.debug(b'reusing %s filelog entry\n' % fname) |
ce9ee81df9ff
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parents:
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|
251 if ( |
ce9ee81df9ff
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252 fparent1 != nullid and manifest1.flags(fname) != fctx.flags() |
ce9ee81df9ff
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253 ) or ( |
ce9ee81df9ff
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254 fparent2 != nullid and manifest2.flags(fname) != fctx.flags() |
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parents:
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|
255 ): |
ce9ee81df9ff
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parents:
45203
diff
changeset
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256 touched = 'modified' |
ce9ee81df9ff
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parents:
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257 return node, touched |
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258 |
ce9ee81df9ff
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259 flog = repo.file(fname) |
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|
260 meta = {} |
ce9ee81df9ff
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parents:
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|
261 cfname = fctx.copysource() |
ce9ee81df9ff
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262 fnode = None |
ce9ee81df9ff
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|
263 |
ce9ee81df9ff
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parents:
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changeset
|
264 if cfname and cfname != fname: |
ce9ee81df9ff
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parents:
45203
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265 # Mark the new revision of this file as a copy of another |
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266 # file. This copy data will effectively act as a parent |
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267 # of this new revision. If this is a merge, the first |
ce9ee81df9ff
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parents:
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268 # parent will be the nullid (meaning "look up the copy data") |
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parents:
45203
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269 # and the second one will be the other parent. For example: |
ce9ee81df9ff
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parents:
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|
270 # |
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parents:
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|
271 # 0 --- 1 --- 3 rev1 changes file foo |
ce9ee81df9ff
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parents:
45203
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|
272 # \ / rev2 renames foo to bar and changes it |
ce9ee81df9ff
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|
273 # \- 2 -/ rev3 should have bar with all changes and |
ce9ee81df9ff
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parents:
45203
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|
274 # should record that bar descends from |
ce9ee81df9ff
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parents:
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|
275 # bar in rev2 and foo in rev1 |
ce9ee81df9ff
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|
276 # |
ce9ee81df9ff
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277 # this allows this merge to succeed: |
ce9ee81df9ff
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parents:
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|
278 # |
ce9ee81df9ff
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parents:
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279 # 0 --- 1 --- 3 rev4 reverts the content change from rev2 |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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diff
changeset
|
280 # \ / merging rev3 and rev4 should use bar@rev2 |
ce9ee81df9ff
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parents:
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|
281 # \- 2 --- 4 as the merge base |
ce9ee81df9ff
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parents:
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|
282 # |
ce9ee81df9ff
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parents:
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|
283 |
ce9ee81df9ff
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parents:
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changeset
|
284 cnode = manifest1.get(cfname) |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
45203
diff
changeset
|
285 newfparent = fparent2 |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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diff
changeset
|
286 |
ce9ee81df9ff
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parents:
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changeset
|
287 if manifest2: # branch merge |
ce9ee81df9ff
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288 if fparent2 == nullid or cnode is None: # copied on remote side |
ce9ee81df9ff
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changeset
|
289 if cfname in manifest2: |
ce9ee81df9ff
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parents:
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|
290 cnode = manifest2[cfname] |
ce9ee81df9ff
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parents:
45203
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|
291 newfparent = fparent1 |
ce9ee81df9ff
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parents:
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|
292 |
ce9ee81df9ff
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|
293 # Here, we used to search backwards through history to try to find |
ce9ee81df9ff
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|
294 # where the file copy came from if the source of a copy was not in |
ce9ee81df9ff
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295 # the parent directory. However, this doesn't actually make sense to |
ce9ee81df9ff
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296 # do (what does a copy from something not in your working copy even |
ce9ee81df9ff
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297 # mean?) and it causes bugs (eg, issue4476). Instead, we will warn |
ce9ee81df9ff
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298 # the user that copy information was dropped, so if they didn't |
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299 # expect this outcome it can be fixed, but this is the correct |
ce9ee81df9ff
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300 # behavior in this circumstance. |
ce9ee81df9ff
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|
301 |
ce9ee81df9ff
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changeset
|
302 if cnode: |
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303 repo.ui.debug(b" %s: copy %s:%s\n" % (fname, cfname, hex(cnode))) |
ce9ee81df9ff
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parents:
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changeset
|
304 if includecopymeta: |
ce9ee81df9ff
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parents:
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diff
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|
305 meta[b"copy"] = cfname |
ce9ee81df9ff
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306 meta[b"copyrev"] = hex(cnode) |
ce9ee81df9ff
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parents:
45203
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|
307 fparent1, fparent2 = nullid, newfparent |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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|
308 else: |
ce9ee81df9ff
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|
309 repo.ui.warn( |
ce9ee81df9ff
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parents:
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diff
changeset
|
310 _( |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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|
311 b"warning: can't find ancestor for '%s' " |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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changeset
|
312 b"copied from '%s'!\n" |
ce9ee81df9ff
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diff
changeset
|
313 ) |
ce9ee81df9ff
commitctx: extract _filecommit too
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|
314 % (fname, cfname) |
ce9ee81df9ff
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changeset
|
315 ) |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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changeset
|
316 |
ce9ee81df9ff
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changeset
|
317 elif fparent1 == nullid: |
ce9ee81df9ff
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parents:
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changeset
|
318 fparent1, fparent2 = fparent2, nullid |
ce9ee81df9ff
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parents:
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changeset
|
319 elif fparent2 != nullid: |
ce9ee81df9ff
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parents:
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changeset
|
320 # is one parent an ancestor of the other? |
ce9ee81df9ff
commitctx: extract _filecommit too
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parents:
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diff
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|
321 fparentancestors = flog.commonancestorsheads(fparent1, fparent2) |
ce9ee81df9ff
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parents:
45203
diff
changeset
|
322 if fparent1 in fparentancestors: |
ce9ee81df9ff
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Pierre-Yves David <pierre-yves.david@octobus.net>
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323 fparent1, fparent2 = fparent2, nullid |
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324 elif fparent2 in fparentancestors: |
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325 fparent2 = nullid |
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326 elif not fparentancestors: |
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327 # TODO: this whole if-else might be simplified much more |
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328 ms = mergestate.mergestate.read(repo) |
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329 if ( |
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330 fname in ms |
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331 and ms[fname] == mergestate.MERGE_RECORD_MERGED_OTHER |
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332 ): |
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333 fparent1, fparent2 = fparent2, nullid |
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334 |
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335 # is the file changed? |
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336 text = fctx.data() |
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337 if fparent2 != nullid or meta or flog.cmp(fparent1, text): |
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338 if touched is None: # do not overwrite added |
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339 touched = 'modified' |
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340 fnode = flog.add(text, meta, tr, linkrev, fparent1, fparent2) |
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341 # are just the flags changed during merge? |
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342 elif fname in manifest1 and manifest1.flags(fname) != fctx.flags(): |
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343 touched = 'modified' |
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344 fnode = fparent1 |
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345 else: |
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346 fnode = fparent1 |
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347 return fnode, touched |
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348 |
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349 |
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350 def _commit_manifest(tr, linkrev, ctx, mctx, files, added, drop): |
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351 """make a new manifest entry (or reuse a new one) |
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352 |
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353 given an initialised manifest context and precomputed list of |
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354 - files: files affected by the commit |
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355 - added: new entries in the manifest |
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356 - drop: entries present in parents but absent of this one |
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357 |
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358 Create a new manifest revision, reuse existing ones if possible. |
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359 |
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360 Return the nodeid of the manifest revision. |
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361 """ |
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362 repo = ctx.repo() |
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363 |
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364 md = None |
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365 |
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366 # all this is cached, so it is find to get them all from the ctx. |
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367 p1 = ctx.p1() |
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368 p2 = ctx.p2() |
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369 m1ctx = p1.manifestctx() |
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370 |
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371 m1 = m1ctx.read() |
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372 |
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373 manifest = mctx.read() |
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374 |
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375 if not files: |
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376 # if no "files" actually changed in terms of the changelog, |
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377 # try hard to detect unmodified manifest entry so that the |
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378 # exact same commit can be reproduced later on convert. |
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379 md = m1.diff(manifest, scmutil.matchfiles(repo, ctx.files())) |
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380 if not files and md: |
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381 repo.ui.debug( |
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382 b'not reusing manifest (no file change in ' |
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383 b'changelog, but manifest differs)\n' |
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384 ) |
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385 if files or md: |
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386 repo.ui.note(_(b"committing manifest\n")) |
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387 # we're using narrowmatch here since it's already applied at |
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388 # other stages (such as dirstate.walk), so we're already |
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389 # ignoring things outside of narrowspec in most cases. The |
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390 # one case where we might have files outside the narrowspec |
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391 # at this point is merges, and we already error out in the |
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392 # case where the merge has files outside of the narrowspec, |
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393 # so this is safe. |
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394 mn = mctx.write( |
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395 tr, |
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396 linkrev, |
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397 p1.manifestnode(), |
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398 p2.manifestnode(), |
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399 added, |
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400 drop, |
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401 match=repo.narrowmatch(), |
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402 ) |
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403 else: |
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404 repo.ui.debug( |
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405 b'reusing manifest from p1 (listed files ' b'actually unchanged)\n' |
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406 ) |
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407 mn = p1.manifestnode() |
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408 |
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409 return mn |