Mercurial > hg
annotate hgext/fastexport.py @ 51801:62b25293b620 default tip
typing: correct a type hint in `mercurial.manifest`
Obvious typo that was flagged by PyCharm.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Wed, 14 Aug 2024 03:25:16 -0400 |
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1 # Copyright 2020 Joerg Sonnenberger <joerg@bec.de> |
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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 """export repositories as git fast-import stream""" |
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6 |
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7 # The format specification for fast-import streams can be found at |
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8 # https://git-scm.com/docs/git-fast-import#_input_format |
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9 |
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10 import re |
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11 |
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12 from mercurial.i18n import _ |
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13 from mercurial.node import hex, nullrev |
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14 from mercurial.utils import stringutil |
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15 from mercurial import ( |
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16 error, |
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17 logcmdutil, |
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18 registrar, |
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19 scmutil, |
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20 ) |
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21 from .convert import convcmd |
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22 |
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23 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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24 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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25 # be specifying the version(s) of Mercurial they are tested with, or |
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26 # leave the attribute unspecified. |
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27 testedwith = b"ships-with-hg-core" |
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28 |
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29 cmdtable = {} |
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30 command = registrar.command(cmdtable) |
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31 |
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32 GIT_PERSON_PROHIBITED = re.compile(b'[<>\n"]') |
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33 GIT_EMAIL_PROHIBITED = re.compile(b"[<> \n]") |
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34 |
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35 |
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36 def convert_to_git_user(authormap, user, rev): |
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37 mapped_user = authormap.get(user, user) |
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38 user_person = stringutil.person(mapped_user) |
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39 user_email = stringutil.email(mapped_user) |
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40 if GIT_EMAIL_PROHIBITED.match(user_email) or GIT_PERSON_PROHIBITED.match( |
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41 user_person |
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42 ): |
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43 raise error.Abort( |
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44 _(b"Unable to parse user into person and email for revision %s") |
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45 % rev |
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46 ) |
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47 if user_person: |
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48 return b'"%s" <%s>' % (user_person, user_email) |
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49 else: |
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50 return b"<%s>" % user_email |
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51 |
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52 |
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53 def convert_to_git_date(date): |
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54 timestamp, utcoff = date |
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55 tzsign = b"+" if utcoff <= 0 else b"-" |
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56 if utcoff % 60 != 0: |
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57 raise error.Abort( |
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58 _(b"UTC offset in %b is not an integer number of seconds") % (date,) |
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59 ) |
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60 utcoff = abs(utcoff) // 60 |
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61 tzh = utcoff // 60 |
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62 tzmin = utcoff % 60 |
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63 return b"%d " % int(timestamp) + tzsign + b"%02d%02d" % (tzh, tzmin) |
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64 |
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65 |
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66 def convert_to_git_ref(branch): |
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67 # XXX filter/map depending on git restrictions |
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68 return b"refs/heads/" + branch |
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69 |
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70 |
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71 def write_data(buf, data, add_newline=False): |
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72 buf.append(b"data %d\n" % len(data)) |
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73 buf.append(data) |
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74 if add_newline or data[-1:] != b"\n": |
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75 buf.append(b"\n") |
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76 |
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77 |
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78 def export_commit(ui, repo, rev, marks, authormap): |
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79 ctx = repo[rev] |
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80 revid = ctx.hex() |
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81 if revid in marks: |
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82 ui.debug(b"warning: revision %s already exported, skipped\n" % revid) |
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83 return |
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84 parents = [p for p in ctx.parents() if p.rev() != nullrev] |
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85 for p in parents: |
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86 if p.hex() not in marks: |
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87 ui.warn( |
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88 _(b"warning: parent %s of %s has not been exported, skipped\n") |
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89 % (p, revid) |
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90 ) |
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91 return |
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92 |
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93 # For all files modified by the commit, check if they have already |
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94 # been exported and otherwise dump the blob with the new mark. |
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95 for fname in ctx.files(): |
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96 if fname not in ctx: |
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97 continue |
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98 filectx = ctx.filectx(fname) |
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99 filerev = hex(filectx.filenode()) |
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100 if filerev not in marks: |
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101 mark = len(marks) + 1 |
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102 marks[filerev] = mark |
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103 data = filectx.data() |
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104 buf = [b"blob\n", b"mark :%d\n" % mark] |
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105 write_data(buf, data, True) |
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106 ui.write(*buf, keepprogressbar=True) |
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107 del buf |
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108 |
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109 # Assign a mark for the current revision for references by |
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110 # latter merge commits. |
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111 mark = len(marks) + 1 |
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112 marks[revid] = mark |
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113 |
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114 ref = convert_to_git_ref(ctx.branch()) |
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115 buf = [ |
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116 b"commit %s\n" % ref, |
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117 b"mark :%d\n" % mark, |
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118 b"committer %s %s\n" |
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119 % ( |
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120 convert_to_git_user(authormap, ctx.user(), revid), |
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121 convert_to_git_date(ctx.date()), |
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122 ), |
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123 ] |
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124 write_data(buf, ctx.description()) |
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125 if parents: |
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126 buf.append(b"from :%d\n" % marks[parents[0].hex()]) |
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127 if len(parents) == 2: |
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128 buf.append(b"merge :%d\n" % marks[parents[1].hex()]) |
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129 p0ctx = repo[parents[0]] |
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130 files = ctx.manifest().diff(p0ctx.manifest()) |
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131 else: |
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132 files = ctx.files() |
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133 filebuf = [] |
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134 for fname in files: |
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135 if fname not in ctx: |
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136 filebuf.append((fname, b"D %s\n" % fname)) |
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137 else: |
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138 filectx = ctx.filectx(fname) |
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139 filerev = filectx.filenode() |
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140 fileperm = b"755" if filectx.isexec() else b"644" |
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141 changed = b"M %s :%d %s\n" % (fileperm, marks[hex(filerev)], fname) |
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142 filebuf.append((fname, changed)) |
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143 filebuf.sort() |
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144 buf.extend(changed for (fname, changed) in filebuf) |
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145 del filebuf |
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146 buf.append(b"\n") |
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147 ui.write(*buf, keepprogressbar=True) |
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148 del buf |
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149 |
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150 |
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151 isrev = re.compile(b"^[0-9a-f]{40}$") |
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152 |
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153 |
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154 @command( |
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155 b"fastexport", |
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156 [ |
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157 (b"r", b"rev", [], _(b"revisions to export"), _(b"REV")), |
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158 (b"i", b"import-marks", b"", _(b"old marks file to read"), _(b"FILE")), |
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159 (b"e", b"export-marks", b"", _(b"new marks file to write"), _(b"FILE")), |
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160 ( |
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161 b"A", |
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162 b"authormap", |
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163 b"", |
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164 _(b"remap usernames using this file"), |
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165 _(b"FILE"), |
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166 ), |
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167 ], |
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168 _(b"[OPTION]... [REV]..."), |
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169 helpcategory=command.CATEGORY_IMPORT_EXPORT, |
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170 ) |
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171 def fastexport(ui, repo, *revs, **opts): |
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172 """export repository as git fast-import stream |
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173 |
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174 This command lets you dump a repository as a human-readable text stream. |
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175 It can be piped into corresponding import routines like "git fast-import". |
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176 Incremental dumps can be created by using marks files. |
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177 """ |
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178 revs += tuple(opts.get("rev", [])) |
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179 if not revs: |
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180 revs = scmutil.revrange(repo, [b":"]) |
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181 else: |
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182 revs = logcmdutil.revrange(repo, revs) |
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183 if not revs: |
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184 raise error.Abort(_(b"no revisions matched")) |
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185 authorfile = opts.get("authormap") |
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186 if authorfile: |
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187 authormap = convcmd.readauthormap(ui, authorfile) |
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188 else: |
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189 authormap = {} |
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190 |
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191 import_marks = opts.get("import_marks") |
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192 marks = {} |
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193 if import_marks: |
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194 with open(import_marks, "rb") as import_marks_file: |
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195 for line in import_marks_file: |
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196 line = line.strip() |
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197 if not isrev.match(line) or line in marks: |
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198 raise error.Abort(_(b"Corrupted marks file")) |
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199 marks[line] = len(marks) + 1 |
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200 |
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201 revs.sort() |
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202 with ui.makeprogress( |
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203 _(b"exporting"), unit=_(b"revisions"), total=len(revs) |
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204 ) as progress: |
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205 for rev in revs: |
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206 export_commit(ui, repo, rev, marks, authormap) |
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207 progress.increment() |
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208 |
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209 export_marks = opts.get("export_marks") |
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210 if export_marks: |
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211 with open(export_marks, "wb") as export_marks_file: |
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212 output_marks = [None] * len(marks) |
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213 for k, v in marks.items(): |
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214 output_marks[v - 1] = k |
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215 for k in output_marks: |
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216 export_marks_file.write(k + b"\n") |