Mercurial > hg
annotate mercurial/commit.py @ 45236:0c468fef09b3
commitctx: extract all the manual logic to process the files
That branch of the if is significantly more complicated than the other two.
Moving it to its own function make it simple to keep the scope limited and to
read to the higher level function.
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 23 Jul 2020 18:25:45 +0200 |
parents | b65b4b09859c |
children | 39f4ec4039a8 |
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 writechangesetcopy, writefilecopymeta = _write_copy_meta(repo) |
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67 |
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68 p1copies, p2copies = None, None |
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69 if writechangesetcopy: |
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70 p1copies = ctx.p1copies() |
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71 p2copies = ctx.p2copies() |
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72 filesadded, filesremoved = None, None |
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73 with repo.lock(), repo.transaction(b"commit") as tr: |
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74 if ctx.manifestnode(): |
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75 # reuse an existing manifest revision |
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76 repo.ui.debug(b'reusing known manifest\n') |
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77 mn = ctx.manifestnode() |
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78 files = ctx.files() |
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79 if writechangesetcopy: |
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80 filesadded = ctx.filesadded() |
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81 filesremoved = ctx.filesremoved() |
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82 elif not ctx.files(): |
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83 repo.ui.debug(b'reusing manifest from p1 (no file change)\n') |
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84 mn = p1.manifestnode() |
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85 files = [] |
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86 else: |
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87 mn, files, added, removed = _process_files(tr, ctx, error=error) |
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88 if writechangesetcopy: |
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89 filesremoved = removed |
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90 filesadded = added |
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91 |
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92 if not writefilecopymeta: |
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93 # If writing only to changeset extras, use None to indicate that |
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94 # no entry should be written. If writing to both, write an empty |
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95 # entry to prevent the reader from falling back to reading |
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96 # filelogs. |
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97 p1copies = p1copies or None |
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98 p2copies = p2copies or None |
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99 filesadded = filesadded or None |
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100 filesremoved = filesremoved or None |
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101 |
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102 if origctx and origctx.manifestnode() == mn: |
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103 files = origctx.files() |
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104 |
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105 # update changelog |
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106 repo.ui.note(_(b"committing changelog\n")) |
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107 repo.changelog.delayupdate(tr) |
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108 n = repo.changelog.add( |
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109 mn, |
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110 files, |
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111 ctx.description(), |
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112 tr, |
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113 p1.node(), |
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114 p2.node(), |
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115 user, |
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116 ctx.date(), |
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117 ctx.extra().copy(), |
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118 p1copies, |
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119 p2copies, |
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120 filesadded, |
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121 filesremoved, |
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122 ) |
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123 xp1, xp2 = p1.hex(), p2 and p2.hex() or b'' |
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124 repo.hook( |
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125 b'pretxncommit', throw=True, node=hex(n), parent1=xp1, parent2=xp2, |
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126 ) |
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127 # set the new commit is proper phase |
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128 targetphase = subrepoutil.newcommitphase(repo.ui, ctx) |
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129 if targetphase: |
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130 # retract boundary do not alter parent changeset. |
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131 # if a parent have higher the resulting phase will |
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132 # be compliant anyway |
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133 # |
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134 # if minimal phase was 0 we don't need to retract anything |
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135 phases.registernew(repo, tr, targetphase, [n]) |
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136 return n |
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137 |
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138 |
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139 def _process_files(tr, ctx, error=False): |
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140 repo = ctx.repo() |
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141 p1 = ctx.p1() |
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142 p2 = ctx.p2() |
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143 |
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144 writechangesetcopy, writefilecopymeta = _write_copy_meta(repo) |
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145 |
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146 m1ctx = p1.manifestctx() |
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147 m2ctx = p2.manifestctx() |
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148 mctx = m1ctx.copy() |
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149 |
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150 m = mctx.read() |
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151 m1 = m1ctx.read() |
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152 m2 = m2ctx.read() |
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153 |
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154 # check in files |
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155 added = [] |
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156 filesadded = [] |
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157 removed = list(ctx.removed()) |
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158 touched = [] |
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159 linkrev = len(repo) |
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160 repo.ui.note(_(b"committing files:\n")) |
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161 uipathfn = scmutil.getuipathfn(repo) |
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162 for f in sorted(ctx.modified() + ctx.added()): |
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163 repo.ui.note(uipathfn(f) + b"\n") |
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164 try: |
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165 fctx = ctx[f] |
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166 if fctx is None: |
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167 removed.append(f) |
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168 else: |
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169 added.append(f) |
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170 m[f], is_touched = _filecommit( |
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171 repo, fctx, m1, m2, linkrev, tr, writefilecopymeta, |
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172 ) |
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173 if is_touched: |
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174 touched.append(f) |
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175 if is_touched == 'added': |
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176 filesadded.append(f) |
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177 m.setflag(f, fctx.flags()) |
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178 except OSError: |
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179 repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f)) |
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180 raise |
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181 except IOError as inst: |
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182 errcode = getattr(inst, 'errno', errno.ENOENT) |
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183 if error or errcode and errcode != errno.ENOENT: |
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184 repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f)) |
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185 raise |
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186 |
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187 # update manifest |
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188 removed = [f for f in removed if f in m1 or f in m2] |
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189 drop = sorted([f for f in removed if f in m]) |
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190 for f in drop: |
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191 del m[f] |
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192 if p2.rev() != nullrev: |
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193 rf = metadata.get_removal_filter(ctx, (p1, p2, m1, m2)) |
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194 removed = [f for f in removed if not rf(f)] |
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195 |
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196 touched.extend(removed) |
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197 |
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198 files = touched |
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199 mn = _commit_manifest(tr, linkrev, ctx, mctx, files, added, drop) |
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200 |
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201 return mn, files, filesadded, removed |
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202 |
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203 |
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204 def _filecommit( |
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205 repo, fctx, manifest1, manifest2, linkrev, tr, includecopymeta, |
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206 ): |
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207 """ |
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208 commit an individual file as part of a larger transaction |
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209 |
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210 input: |
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211 |
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212 fctx: a file context with the content we are trying to commit |
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213 manifest1: manifest of changeset first parent |
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214 manifest2: manifest of changeset second parent |
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215 linkrev: revision number of the changeset being created |
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216 tr: current transation |
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217 individual: boolean, set to False to skip storing the copy data |
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218 (only used by the Google specific feature of using |
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|
219 changeset extra as copy source of truth). |
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220 |
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221 output: (filenode, touched) |
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222 |
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223 filenode: the filenode that should be used by this changeset |
45223
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224 touched: one of: None (mean untouched), 'added' or 'modified' |
45204
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225 """ |
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226 |
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227 fname = fctx.path() |
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228 fparent1 = manifest1.get(fname, nullid) |
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229 fparent2 = manifest2.get(fname, nullid) |
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230 touched = None |
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231 if fparent1 == fparent2 == nullid: |
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232 touched = 'added' |
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233 |
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234 if isinstance(fctx, context.filectx): |
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235 # This block fast path most comparisons which are usually done. It |
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236 # assumes that bare filectx is used and no merge happened, hence no |
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237 # need to create a new file revision in this case. |
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238 node = fctx.filenode() |
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239 if node in [fparent1, fparent2]: |
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240 repo.ui.debug(b'reusing %s filelog entry\n' % fname) |
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241 if ( |
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242 fparent1 != nullid and manifest1.flags(fname) != fctx.flags() |
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243 ) or ( |
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244 fparent2 != nullid and manifest2.flags(fname) != fctx.flags() |
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|
245 ): |
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246 touched = 'modified' |
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247 return node, touched |
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248 |
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249 flog = repo.file(fname) |
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250 meta = {} |
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251 cfname = fctx.copysource() |
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252 fnode = None |
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253 |
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254 if cfname and cfname != fname: |
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255 # Mark the new revision of this file as a copy of another |
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256 # file. This copy data will effectively act as a parent |
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257 # of this new revision. If this is a merge, the first |
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258 # parent will be the nullid (meaning "look up the copy data") |
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259 # and the second one will be the other parent. For example: |
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260 # |
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261 # 0 --- 1 --- 3 rev1 changes file foo |
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262 # \ / rev2 renames foo to bar and changes it |
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263 # \- 2 -/ rev3 should have bar with all changes and |
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264 # should record that bar descends from |
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265 # bar in rev2 and foo in rev1 |
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266 # |
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267 # this allows this merge to succeed: |
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268 # |
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269 # 0 --- 1 --- 3 rev4 reverts the content change from rev2 |
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270 # \ / merging rev3 and rev4 should use bar@rev2 |
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271 # \- 2 --- 4 as the merge base |
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272 # |
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273 |
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274 cnode = manifest1.get(cfname) |
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275 newfparent = fparent2 |
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276 |
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277 if manifest2: # branch merge |
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278 if fparent2 == nullid or cnode is None: # copied on remote side |
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279 if cfname in manifest2: |
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280 cnode = manifest2[cfname] |
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281 newfparent = fparent1 |
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282 |
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283 # Here, we used to search backwards through history to try to find |
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284 # where the file copy came from if the source of a copy was not in |
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285 # the parent directory. However, this doesn't actually make sense to |
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286 # do (what does a copy from something not in your working copy even |
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287 # mean?) and it causes bugs (eg, issue4476). Instead, we will warn |
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288 # the user that copy information was dropped, so if they didn't |
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289 # expect this outcome it can be fixed, but this is the correct |
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290 # behavior in this circumstance. |
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|
291 |
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292 if cnode: |
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293 repo.ui.debug(b" %s: copy %s:%s\n" % (fname, cfname, hex(cnode))) |
ce9ee81df9ff
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294 if includecopymeta: |
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295 meta[b"copy"] = cfname |
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296 meta[b"copyrev"] = hex(cnode) |
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297 fparent1, fparent2 = nullid, newfparent |
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298 else: |
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299 repo.ui.warn( |
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|
300 _( |
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301 b"warning: can't find ancestor for '%s' " |
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302 b"copied from '%s'!\n" |
ce9ee81df9ff
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|
303 ) |
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|
304 % (fname, cfname) |
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|
305 ) |
ce9ee81df9ff
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|
306 |
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307 elif fparent1 == nullid: |
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308 fparent1, fparent2 = fparent2, nullid |
ce9ee81df9ff
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309 elif fparent2 != nullid: |
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310 # is one parent an ancestor of the other? |
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311 fparentancestors = flog.commonancestorsheads(fparent1, fparent2) |
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312 if fparent1 in fparentancestors: |
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313 fparent1, fparent2 = fparent2, nullid |
ce9ee81df9ff
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314 elif fparent2 in fparentancestors: |
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|
315 fparent2 = nullid |
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316 elif not fparentancestors: |
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317 # TODO: this whole if-else might be simplified much more |
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318 ms = mergestate.mergestate.read(repo) |
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319 if ( |
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320 fname in ms |
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321 and ms[fname] == mergestate.MERGE_RECORD_MERGED_OTHER |
ce9ee81df9ff
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|
322 ): |
ce9ee81df9ff
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323 fparent1, fparent2 = fparent2, nullid |
ce9ee81df9ff
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|
324 |
ce9ee81df9ff
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325 # is the file changed? |
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326 text = fctx.data() |
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327 if fparent2 != nullid or meta or flog.cmp(fparent1, text): |
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328 if touched is None: # do not overwrite added |
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329 touched = 'modified' |
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330 fnode = flog.add(text, meta, tr, linkrev, fparent1, fparent2) |
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331 # are just the flags changed during merge? |
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332 elif fname in manifest1 and manifest1.flags(fname) != fctx.flags(): |
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333 touched = 'modified' |
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334 fnode = fparent1 |
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335 else: |
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336 fnode = fparent1 |
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337 return fnode, touched |
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338 |
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339 |
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340 def _commit_manifest(tr, linkrev, ctx, mctx, files, added, drop): |
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341 """make a new manifest entry (or reuse a new one) |
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342 |
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343 given an initialised manifest context and precomputed list of |
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344 - files: files affected by the commit |
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345 - added: new entries in the manifest |
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346 - drop: entries present in parents but absent of this one |
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347 |
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348 Create a new manifest revision, reuse existing ones if possible. |
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349 |
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350 Return the nodeid of the manifest revision. |
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351 """ |
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352 repo = ctx.repo() |
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353 |
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354 md = None |
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355 |
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356 # all this is cached, so it is find to get them all from the ctx. |
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357 p1 = ctx.p1() |
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358 p2 = ctx.p2() |
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359 m1ctx = p1.manifestctx() |
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360 |
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361 m1 = m1ctx.read() |
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362 |
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363 manifest = mctx.read() |
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364 |
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365 if not files: |
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366 # if no "files" actually changed in terms of the changelog, |
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367 # try hard to detect unmodified manifest entry so that the |
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368 # exact same commit can be reproduced later on convert. |
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369 md = m1.diff(manifest, scmutil.matchfiles(repo, ctx.files())) |
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370 if not files and md: |
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371 repo.ui.debug( |
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372 b'not reusing manifest (no file change in ' |
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373 b'changelog, but manifest differs)\n' |
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374 ) |
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375 if files or md: |
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376 repo.ui.note(_(b"committing manifest\n")) |
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377 # we're using narrowmatch here since it's already applied at |
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378 # other stages (such as dirstate.walk), so we're already |
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379 # ignoring things outside of narrowspec in most cases. The |
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380 # one case where we might have files outside the narrowspec |
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381 # at this point is merges, and we already error out in the |
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382 # case where the merge has files outside of the narrowspec, |
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383 # so this is safe. |
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384 mn = mctx.write( |
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385 tr, |
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386 linkrev, |
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387 p1.manifestnode(), |
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388 p2.manifestnode(), |
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389 added, |
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390 drop, |
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391 match=repo.narrowmatch(), |
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392 ) |
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393 else: |
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394 repo.ui.debug( |
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395 b'reusing manifest from p1 (listed files ' b'actually unchanged)\n' |
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396 ) |
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397 mn = p1.manifestnode() |
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398 |
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399 return mn |