Mercurial > hg
annotate hgext/fastexport.py @ 46729:6cd9f53aaed8
rhg: Fall back to Python on --repository with an URL
A low-hanging fruit to improve on this would be to properly parse
and handle `file:` URLs. But other Python-based hg supports
some other URL schemes for features that rhg does not support yet.
Differential Revision: https://phab.mercurial-scm.org/D10101
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Wed, 03 Mar 2021 19:02:06 +0100 |
parents | edffab2cf0ea |
children | 5ced12cfa41b |
rev | line source |
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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 from __future__ import absolute_import |
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11 import re |
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12 |
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13 from mercurial.i18n import _ |
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14 from mercurial.node import hex, nullrev |
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15 from mercurial.utils import stringutil |
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16 from mercurial import ( |
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17 error, |
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18 pycompat, |
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19 registrar, |
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20 scmutil, |
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21 ) |
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22 from .convert import convcmd |
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23 |
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24 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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25 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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26 # be specifying the version(s) of Mercurial they are tested with, or |
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27 # leave the attribute unspecified. |
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28 testedwith = b"ships-with-hg-core" |
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29 |
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30 cmdtable = {} |
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31 command = registrar.command(cmdtable) |
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32 |
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33 GIT_PERSON_PROHIBITED = re.compile(b'[<>\n"]') |
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34 GIT_EMAIL_PROHIBITED = re.compile(b"[<> \n]") |
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35 |
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36 |
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37 def convert_to_git_user(authormap, user, rev): |
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38 mapped_user = authormap.get(user, user) |
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39 user_person = stringutil.person(mapped_user) |
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40 user_email = stringutil.email(mapped_user) |
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41 if GIT_EMAIL_PROHIBITED.match(user_email) or GIT_PERSON_PROHIBITED.match( |
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42 user_person |
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43 ): |
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44 raise error.Abort( |
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45 _(b"Unable to parse user into person and email for revision %s") |
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46 % rev |
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47 ) |
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48 if user_person: |
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49 return b'"' + user_person + b'" <' + user_email + b'>' |
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50 else: |
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51 return b"<" + user_email + b">" |
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52 |
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53 |
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54 def convert_to_git_date(date): |
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55 timestamp, utcoff = date |
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56 tzsign = b"+" if utcoff <= 0 else b"-" |
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57 if utcoff % 60 != 0: |
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58 raise error.Abort( |
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59 _(b"UTC offset in %b is not an integer number of seconds") % (date,) |
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60 ) |
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61 utcoff = abs(utcoff) // 60 |
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62 tzh = utcoff // 60 |
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63 tzmin = utcoff % 60 |
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64 return b"%d " % int(timestamp) + tzsign + b"%02d%02d" % (tzh, tzmin) |
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65 |
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66 |
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67 def convert_to_git_ref(branch): |
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68 # XXX filter/map depending on git restrictions |
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69 return b"refs/heads/" + branch |
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70 |
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71 |
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72 def write_data(buf, data, skip_newline): |
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73 buf.append(b"data %d\n" % len(data)) |
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74 buf.append(data) |
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75 if not skip_newline or data[-1:] != b"\n": |
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76 buf.append(b"\n") |
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77 |
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78 |
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79 def export_commit(ui, repo, rev, marks, authormap): |
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80 ctx = repo[rev] |
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81 revid = ctx.hex() |
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82 if revid in marks: |
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83 ui.debug(b"warning: revision %s already exported, skipped\n" % revid) |
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84 return |
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85 parents = [p for p in ctx.parents() if p.rev() != nullrev] |
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86 for p in parents: |
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87 if p.hex() not in marks: |
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88 ui.warn( |
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89 _(b"warning: parent %s of %s has not been exported, skipped\n") |
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90 % (p, revid) |
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91 ) |
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92 return |
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93 |
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94 # For all files modified by the commit, check if they have already |
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95 # been exported and otherwise dump the blob with the new mark. |
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96 for fname in ctx.files(): |
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97 if fname not in ctx: |
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98 continue |
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99 filectx = ctx.filectx(fname) |
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100 filerev = hex(filectx.filenode()) |
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101 if filerev not in marks: |
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102 mark = len(marks) + 1 |
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103 marks[filerev] = mark |
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104 data = filectx.data() |
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105 buf = [b"blob\n", b"mark :%d\n" % mark] |
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106 write_data(buf, data, False) |
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107 ui.write(*buf, keepprogressbar=True) |
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108 del buf |
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109 |
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110 # Assign a mark for the current revision for references by |
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111 # latter merge commits. |
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112 mark = len(marks) + 1 |
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113 marks[revid] = mark |
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114 |
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115 ref = convert_to_git_ref(ctx.branch()) |
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116 buf = [ |
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117 b"commit %s\n" % ref, |
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118 b"mark :%d\n" % mark, |
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119 b"committer %s %s\n" |
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120 % ( |
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121 convert_to_git_user(authormap, ctx.user(), revid), |
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122 convert_to_git_date(ctx.date()), |
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123 ), |
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124 ] |
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125 write_data(buf, ctx.description(), True) |
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126 if parents: |
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127 buf.append(b"from :%d\n" % marks[parents[0].hex()]) |
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128 if len(parents) == 2: |
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129 buf.append(b"merge :%d\n" % marks[parents[1].hex()]) |
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130 p0ctx = repo[parents[0]] |
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131 files = ctx.manifest().diff(p0ctx.manifest()) |
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132 else: |
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133 files = ctx.files() |
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134 filebuf = [] |
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135 for fname in files: |
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136 if fname not in ctx: |
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137 filebuf.append((fname, b"D %s\n" % fname)) |
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138 else: |
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139 filectx = ctx.filectx(fname) |
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140 filerev = filectx.filenode() |
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141 fileperm = b"755" if filectx.isexec() else b"644" |
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142 changed = b"M %s :%d %s\n" % (fileperm, marks[hex(filerev)], fname) |
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143 filebuf.append((fname, changed)) |
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144 filebuf.sort() |
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145 buf.extend(changed for (fname, changed) in filebuf) |
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146 del filebuf |
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147 buf.append(b"\n") |
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148 ui.write(*buf, keepprogressbar=True) |
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149 del buf |
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150 |
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151 |
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152 isrev = re.compile(b"^[0-9a-f]{40}$") |
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153 |
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154 |
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155 @command( |
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156 b"fastexport", |
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157 [ |
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158 (b"r", b"rev", [], _(b"revisions to export"), _(b"REV")), |
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159 (b"i", b"import-marks", b"", _(b"old marks file to read"), _(b"FILE")), |
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160 (b"e", b"export-marks", b"", _(b"new marks file to write"), _(b"FILE")), |
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161 ( |
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162 b"A", |
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163 b"authormap", |
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164 b"", |
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165 _(b"remap usernames using this file"), |
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166 _(b"FILE"), |
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167 ), |
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168 ], |
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169 _(b"[OPTION]... [REV]..."), |
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170 helpcategory=command.CATEGORY_IMPORT_EXPORT, |
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171 ) |
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172 def fastexport(ui, repo, *revs, **opts): |
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173 """export repository as git fast-import stream |
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174 |
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175 This command lets you dump a repository as a human-readable text stream. |
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176 It can be piped into corresponding import routines like "git fast-import". |
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177 Incremental dumps can be created by using marks files. |
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178 """ |
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179 opts = pycompat.byteskwargs(opts) |
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180 |
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181 revs += tuple(opts.get(b"rev", [])) |
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182 if not revs: |
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183 revs = scmutil.revrange(repo, [b":"]) |
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184 else: |
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185 revs = scmutil.revrange(repo, revs) |
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186 if not revs: |
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187 raise error.Abort(_(b"no revisions matched")) |
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188 authorfile = opts.get(b"authormap") |
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189 if authorfile: |
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190 authormap = convcmd.readauthormap(ui, authorfile) |
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191 else: |
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192 authormap = {} |
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193 |
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194 import_marks = opts.get(b"import_marks") |
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195 marks = {} |
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196 if import_marks: |
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197 with open(import_marks, "rb") as import_marks_file: |
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198 for line in import_marks_file: |
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199 line = line.strip() |
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200 if not isrev.match(line) or line in marks: |
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201 raise error.Abort(_(b"Corrupted marks file")) |
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202 marks[line] = len(marks) + 1 |
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203 |
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204 revs.sort() |
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205 with ui.makeprogress( |
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206 _(b"exporting"), unit=_(b"revisions"), total=len(revs) |
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207 ) as progress: |
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208 for rev in revs: |
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209 export_commit(ui, repo, rev, marks, authormap) |
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210 progress.increment() |
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211 |
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212 export_marks = opts.get(b"export_marks") |
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213 if export_marks: |
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214 with open(export_marks, "wb") as export_marks_file: |
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215 output_marks = [None] * len(marks) |
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216 for k, v in marks.items(): |
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217 output_marks[v - 1] = k |
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218 for k in output_marks: |
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219 export_marks_file.write(k + b"\n") |