Mercurial > hg
annotate hgext/shelve.py @ 19887:dd7c294365f0
shelve: fix dirstate corruption during unshelve (issue4055)
If you shelved on top of commit A, then rebased A to @ and unshelved, any file
changed in A would appear as modified in hg status despite the contents not having
changed.
The fix is to use dirstate.setparents() instead of doing it manually. This will
be a little slower since it has to iterate through everything in the dirstate
instead of only what's in the mergestate, but this will be more correct since
the mergestate did not include files which were merged but had no conflict.
The tests also had several bad dirstate's hardcoded in them. This change updates
the tests appropriately and adds a new test to cover this specific rebase case.
author | Durham Goode <durham@fb.com> |
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date | Fri, 11 Oct 2013 17:19:40 -0700 |
parents | 6cc696179869 |
children | 5b327880a660 |
rev | line source |
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19854
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1 # shelve.py - save/restore working directory state |
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2 # |
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3 # Copyright 2013 Facebook, Inc. |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 """save and restore changes to the working directory |
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9 |
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10 The "hg shelve" command saves changes made to the working directory |
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11 and reverts those changes, resetting the working directory to a clean |
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12 state. |
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13 |
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14 Later on, the "hg unshelve" command restores the changes saved by "hg |
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15 shelve". Changes can be restored even after updating to a different |
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16 parent, in which case Mercurial's merge machinery will resolve any |
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17 conflicts if necessary. |
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18 |
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19 You can have more than one shelved change outstanding at a time; each |
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20 shelved change has a distinct name. For details, see the help for "hg |
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21 shelve". |
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22 """ |
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23 |
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24 try: |
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25 import cPickle as pickle |
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26 pickle.dump # import now |
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27 except ImportError: |
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28 import pickle |
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29 from mercurial.i18n import _ |
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30 from mercurial.node import nullid |
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31 from mercurial import changegroup, cmdutil, scmutil, phases |
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32 from mercurial import error, hg, mdiff, merge, patch, repair, util |
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33 from mercurial import templatefilters |
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34 from mercurial import lock as lockmod |
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35 import errno |
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36 |
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37 cmdtable = {} |
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38 command = cmdutil.command(cmdtable) |
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39 testedwith = 'internal' |
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40 |
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41 class shelvedfile(object): |
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42 """Handles common functions on shelve files (.hg/.files/.patch) using |
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43 the vfs layer""" |
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44 def __init__(self, repo, name, filetype=None): |
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45 self.repo = repo |
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46 self.name = name |
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47 self.vfs = scmutil.vfs(repo.join('shelved')) |
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48 if filetype: |
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49 self.fname = name + '.' + filetype |
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50 else: |
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51 self.fname = name |
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52 |
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53 def exists(self): |
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54 return self.vfs.exists(self.fname) |
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55 |
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56 def filename(self): |
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57 return self.vfs.join(self.fname) |
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58 |
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59 def unlink(self): |
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60 util.unlink(self.filename()) |
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61 |
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62 def stat(self): |
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63 return self.vfs.stat(self.fname) |
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64 |
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65 def opener(self, mode='rb'): |
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66 try: |
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67 return self.vfs(self.fname, mode) |
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68 except IOError, err: |
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69 if err.errno != errno.ENOENT: |
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70 raise |
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71 if mode[0] in 'wa': |
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72 try: |
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73 self.vfs.mkdir() |
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74 return self.vfs(self.fname, mode) |
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75 except IOError, err: |
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76 if err.errno != errno.EEXIST: |
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77 raise |
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78 elif mode[0] == 'r': |
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79 raise util.Abort(_("shelved change '%s' not found") % |
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80 self.name) |
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81 |
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82 class shelvedstate(object): |
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83 """Handles saving and restoring a shelved state. Ensures that different |
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84 versions of a shelved state are possible and handles them appropriate""" |
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85 _version = 1 |
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86 _filename = 'shelvedstate' |
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87 |
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88 @classmethod |
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89 def load(cls, repo): |
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90 fp = repo.opener(cls._filename) |
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91 (version, name, parents, stripnodes) = pickle.load(fp) |
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92 |
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93 if version != cls._version: |
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94 raise util.Abort(_('this version of shelve is incompatible ' |
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95 'with the version used in this repo')) |
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96 |
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97 obj = cls() |
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98 obj.name = name |
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99 obj.parents = parents |
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100 obj.stripnodes = stripnodes |
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101 |
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102 return obj |
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103 |
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104 @classmethod |
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105 def save(cls, repo, name, stripnodes): |
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106 fp = repo.opener(cls._filename, 'wb') |
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107 pickle.dump((cls._version, name, |
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108 repo.dirstate.parents(), |
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109 stripnodes), fp) |
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110 fp.close() |
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111 |
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112 @staticmethod |
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113 def clear(repo): |
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114 util.unlinkpath(repo.join('shelvedstate'), ignoremissing=True) |
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115 |
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116 def createcmd(ui, repo, pats, opts): |
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117 def publicancestors(ctx): |
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118 """Compute the heads of the public ancestors of a commit. |
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119 |
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120 Much faster than the revset heads(ancestors(ctx) - draft())""" |
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121 seen = set() |
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122 visit = util.deque() |
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123 visit.append(ctx) |
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124 while visit: |
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125 ctx = visit.popleft() |
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126 for parent in ctx.parents(): |
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127 rev = parent.rev() |
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128 if rev not in seen: |
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129 seen.add(rev) |
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130 if parent.mutable(): |
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131 visit.append(parent) |
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132 else: |
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133 yield parent.node() |
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134 |
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135 wctx = repo[None] |
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136 parents = wctx.parents() |
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137 if len(parents) > 1: |
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138 raise util.Abort(_('cannot shelve while merging')) |
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139 parent = parents[0] |
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140 |
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141 # we never need the user, so we use a generic user for all shelve operations |
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142 user = 'shelve@localhost' |
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143 label = repo._bookmarkcurrent or parent.branch() or 'default' |
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144 |
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145 # slashes aren't allowed in filenames, therefore we rename it |
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146 origlabel, label = label, label.replace('/', '_') |
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147 |
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148 def gennames(): |
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149 yield label |
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150 for i in xrange(1, 100): |
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151 yield '%s-%02d' % (label, i) |
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152 |
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153 shelvedfiles = [] |
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154 |
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155 def commitfunc(ui, repo, message, match, opts): |
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156 # check modified, added, removed, deleted only |
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157 for flist in repo.status(match=match)[:4]: |
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158 shelvedfiles.extend(flist) |
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159 hasmq = util.safehasattr(repo, 'mq') |
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160 if hasmq: |
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161 saved, repo.mq.checkapplied = repo.mq.checkapplied, False |
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162 try: |
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163 return repo.commit(message, user, opts.get('date'), match) |
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164 finally: |
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165 if hasmq: |
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166 repo.mq.checkapplied = saved |
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167 |
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168 if parent.node() != nullid: |
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169 desc = parent.description().split('\n', 1)[0] |
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170 else: |
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171 desc = '(empty repository)' |
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172 |
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173 if not opts['message']: |
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174 opts['message'] = desc |
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175 |
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176 name = opts['name'] |
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177 |
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178 wlock = lock = tr = bms = None |
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179 try: |
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180 wlock = repo.wlock() |
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181 lock = repo.lock() |
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182 |
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183 bms = repo._bookmarks.copy() |
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184 # use an uncommited transaction to generate the bundle to avoid |
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185 # pull races. ensure we don't print the abort message to stderr. |
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186 tr = repo.transaction('commit', report=lambda x: None) |
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187 |
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188 if name: |
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189 if shelvedfile(repo, name, 'hg').exists(): |
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190 raise util.Abort(_("a shelved change named '%s' already exists") |
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191 % name) |
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192 else: |
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193 for n in gennames(): |
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194 if not shelvedfile(repo, n, 'hg').exists(): |
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195 name = n |
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196 break |
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197 else: |
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198 raise util.Abort(_("too many shelved changes named '%s'") % |
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199 label) |
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200 |
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201 # ensure we are not creating a subdirectory or a hidden file |
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202 if '/' in name or '\\' in name: |
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203 raise util.Abort(_('shelved change names may not contain slashes')) |
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204 if name.startswith('.'): |
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205 raise util.Abort(_("shelved change names may not start with '.'")) |
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206 |
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207 node = cmdutil.commit(ui, repo, commitfunc, pats, opts) |
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208 |
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209 if not node: |
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210 stat = repo.status(match=scmutil.match(repo[None], pats, opts)) |
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211 if stat[3]: |
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212 ui.status(_("nothing changed (%d missing files, see " |
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213 "'hg status')\n") % len(stat[3])) |
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214 else: |
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215 ui.status(_("nothing changed\n")) |
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216 return 1 |
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217 |
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218 phases.retractboundary(repo, phases.secret, [node]) |
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219 |
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220 fp = shelvedfile(repo, name, 'files').opener('wb') |
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221 fp.write('\0'.join(shelvedfiles)) |
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222 |
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223 bases = list(publicancestors(repo[node])) |
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224 cg = repo.changegroupsubset(bases, [node], 'shelve') |
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225 changegroup.writebundle(cg, shelvedfile(repo, name, 'hg').filename(), |
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226 'HG10UN') |
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227 cmdutil.export(repo, [node], |
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228 fp=shelvedfile(repo, name, 'patch').opener('wb'), |
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229 opts=mdiff.diffopts(git=True)) |
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230 |
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231 |
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232 if ui.formatted(): |
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233 desc = util.ellipsis(desc, ui.termwidth()) |
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234 ui.status(_('shelved as %s\n') % name) |
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235 hg.update(repo, parent.node()) |
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236 finally: |
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237 if bms: |
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238 # restore old bookmarks |
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239 repo._bookmarks.update(bms) |
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240 repo._bookmarks.write() |
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241 if tr: |
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242 tr.abort() |
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243 lockmod.release(lock, wlock) |
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244 |
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245 def cleanupcmd(ui, repo): |
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246 wlock = None |
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247 try: |
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248 wlock = repo.wlock() |
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249 for (name, _) in repo.vfs.readdir('shelved'): |
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250 suffix = name.rsplit('.', 1)[-1] |
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251 if suffix in ('hg', 'files', 'patch'): |
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252 shelvedfile(repo, name).unlink() |
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253 finally: |
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254 lockmod.release(wlock) |
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255 |
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256 def deletecmd(ui, repo, pats): |
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257 if not pats: |
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258 raise util.Abort(_('no shelved changes specified!')) |
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259 wlock = None |
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260 try: |
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261 wlock = repo.wlock() |
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262 try: |
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263 for name in pats: |
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264 for suffix in 'hg files patch'.split(): |
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265 shelvedfile(repo, name, suffix).unlink() |
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266 except OSError, err: |
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267 if err.errno != errno.ENOENT: |
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268 raise |
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269 raise util.Abort(_("shelved change '%s' not found") % name) |
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270 finally: |
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271 lockmod.release(wlock) |
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272 |
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273 def listshelves(repo): |
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274 try: |
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275 names = repo.vfs.readdir('shelved') |
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276 except OSError, err: |
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277 if err.errno != errno.ENOENT: |
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278 raise |
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279 return [] |
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280 info = [] |
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281 for (name, _) in names: |
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282 pfx, sfx = name.rsplit('.', 1) |
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283 if not pfx or sfx != 'patch': |
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284 continue |
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285 st = shelvedfile(repo, name).stat() |
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286 info.append((st.st_mtime, shelvedfile(repo, pfx).filename())) |
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287 return sorted(info, reverse=True) |
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288 |
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289 def listcmd(ui, repo, pats, opts): |
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290 pats = set(pats) |
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291 width = 80 |
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292 if not ui.plain(): |
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293 width = ui.termwidth() |
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294 namelabel = 'shelve.newest' |
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295 for mtime, name in listshelves(repo): |
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296 sname = util.split(name)[1] |
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297 if pats and sname not in pats: |
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298 continue |
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299 ui.write(sname, label=namelabel) |
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300 namelabel = 'shelve.name' |
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301 if ui.quiet: |
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302 ui.write('\n') |
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303 continue |
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304 ui.write(' ' * (16 - len(sname))) |
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305 used = 16 |
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306 age = '(%s)' % templatefilters.age(util.makedate(mtime), abbrev=True) |
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307 ui.write(age, label='shelve.age') |
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308 ui.write(' ' * (12 - len(age))) |
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309 used += 12 |
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310 fp = open(name + '.patch', 'rb') |
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311 try: |
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312 while True: |
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313 line = fp.readline() |
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314 if not line: |
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315 break |
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316 if not line.startswith('#'): |
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317 desc = line.rstrip() |
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318 if ui.formatted(): |
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319 desc = util.ellipsis(desc, width - used) |
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320 ui.write(desc) |
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321 break |
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322 ui.write('\n') |
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323 if not (opts['patch'] or opts['stat']): |
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324 continue |
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325 difflines = fp.readlines() |
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326 if opts['patch']: |
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327 for chunk, label in patch.difflabel(iter, difflines): |
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328 ui.write(chunk, label=label) |
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329 if opts['stat']: |
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330 for chunk, label in patch.diffstatui(difflines, width=width, |
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331 git=True): |
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332 ui.write(chunk, label=label) |
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333 finally: |
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|
334 fp.close() |
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|
335 |
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336 def readshelvedfiles(repo, basename): |
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337 fp = shelvedfile(repo, basename, 'files').opener() |
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338 return fp.read().split('\0') |
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339 |
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340 def checkparents(repo, state): |
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341 if state.parents != repo.dirstate.parents(): |
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342 raise util.Abort(_('working directory parents do not match unshelve ' |
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|
343 'state')) |
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344 |
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345 def unshelveabort(ui, repo, state, opts): |
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346 wlock = repo.wlock() |
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|
347 lock = None |
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|
348 try: |
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|
349 checkparents(repo, state) |
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350 lock = repo.lock() |
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351 merge.mergestate(repo).reset() |
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352 if opts['keep']: |
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353 repo.setparents(repo.dirstate.parents()[0]) |
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354 else: |
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355 revertfiles = readshelvedfiles(repo, state.name) |
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356 wctx = repo.parents()[0] |
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357 cmdutil.revert(ui, repo, wctx, [wctx.node(), nullid], |
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358 *revertfiles, **{'no_backup': True}) |
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359 # fix up the weird dirstate states the merge left behind |
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360 mf = wctx.manifest() |
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361 dirstate = repo.dirstate |
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362 for f in revertfiles: |
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363 if f in mf: |
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364 dirstate.normallookup(f) |
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365 else: |
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366 dirstate.drop(f) |
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367 dirstate._pl = (wctx.node(), nullid) |
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368 dirstate._dirty = True |
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369 repair.strip(ui, repo, state.stripnodes, backup='none', topic='shelve') |
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370 shelvedstate.clear(repo) |
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371 ui.warn(_("unshelve of '%s' aborted\n") % state.name) |
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372 finally: |
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373 lockmod.release(lock, wlock) |
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374 |
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375 def unshelvecleanup(ui, repo, name, opts): |
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376 if not opts['keep']: |
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377 for filetype in 'hg files patch'.split(): |
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378 shelvedfile(repo, name, filetype).unlink() |
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379 |
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380 def finishmerge(ui, repo, ms, stripnodes, name, opts): |
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381 # Reset the working dir so it's no longer in a merge state. |
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382 dirstate = repo.dirstate |
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383 dirstate.setparents(dirstate._pl[0]) |
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384 shelvedstate.clear(repo) |
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385 |
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386 def unshelvecontinue(ui, repo, state, opts): |
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387 # We're finishing off a merge. First parent is our original |
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388 # parent, second is the temporary "fake" commit we're unshelving. |
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389 wlock = repo.wlock() |
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390 lock = None |
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391 try: |
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392 checkparents(repo, state) |
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393 ms = merge.mergestate(repo) |
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394 if [f for f in ms if ms[f] == 'u']: |
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395 raise util.Abort( |
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396 _("unresolved conflicts, can't continue"), |
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397 hint=_("see 'hg resolve', then 'hg unshelve --continue'")) |
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398 finishmerge(ui, repo, ms, state.stripnodes, state.name, opts) |
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399 lock = repo.lock() |
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400 repair.strip(ui, repo, state.stripnodes, backup='none', topic='shelve') |
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401 unshelvecleanup(ui, repo, state.name, opts) |
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402 ui.status(_("unshelve of '%s' complete\n") % state.name) |
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403 finally: |
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404 lockmod.release(lock, wlock) |
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405 |
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406 @command('unshelve', |
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407 [('a', 'abort', None, |
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408 _('abort an incomplete unshelve operation')), |
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409 ('c', 'continue', None, |
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410 _('continue an incomplete unshelve operation')), |
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411 ('', 'keep', None, |
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412 _('keep shelve after unshelving'))], |
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413 _('hg unshelve [SHELVED]')) |
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414 def unshelve(ui, repo, *shelved, **opts): |
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415 """restore a shelved change to the working directory |
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416 |
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417 This command accepts an optional name of a shelved change to |
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418 restore. If none is given, the most recent shelved change is used. |
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419 |
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420 If a shelved change is applied successfully, the bundle that |
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421 contains the shelved changes is deleted afterwards. |
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422 |
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423 Since you can restore a shelved change on top of an arbitrary |
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424 commit, it is possible that unshelving will result in a conflict |
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425 between your changes and the commits you are unshelving onto. If |
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426 this occurs, you must resolve the conflict, then use |
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427 ``--continue`` to complete the unshelve operation. (The bundle |
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428 will not be deleted until you successfully complete the unshelve.) |
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429 |
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430 (Alternatively, you can use ``--abort`` to abandon an unshelve |
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431 that causes a conflict. This reverts the unshelved changes, and |
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432 does not delete the bundle.) |
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433 """ |
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434 abortf = opts['abort'] |
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435 continuef = opts['continue'] |
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436 if not abortf and not continuef: |
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437 cmdutil.checkunfinished(repo) |
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438 |
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439 if abortf or continuef: |
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440 if abortf and continuef: |
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441 raise util.Abort(_('cannot use both abort and continue')) |
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442 if shelved: |
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443 raise util.Abort(_('cannot combine abort/continue with ' |
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444 'naming a shelved change')) |
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445 |
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446 try: |
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447 state = shelvedstate.load(repo) |
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448 except IOError, err: |
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449 if err.errno != errno.ENOENT: |
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450 raise |
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451 raise util.Abort(_('no unshelve operation underway')) |
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452 |
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453 if abortf: |
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454 return unshelveabort(ui, repo, state, opts) |
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455 elif continuef: |
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456 return unshelvecontinue(ui, repo, state, opts) |
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457 elif len(shelved) > 1: |
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458 raise util.Abort(_('can only unshelve one change at a time')) |
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459 elif not shelved: |
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460 shelved = listshelves(repo) |
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461 if not shelved: |
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462 raise util.Abort(_('no shelved changes to apply!')) |
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463 basename = util.split(shelved[0][1])[1] |
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464 ui.status(_("unshelving change '%s'\n") % basename) |
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465 else: |
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466 basename = shelved[0] |
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467 |
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468 shelvedfiles = readshelvedfiles(repo, basename) |
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469 |
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470 m, a, r, d = repo.status()[:4] |
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471 unsafe = set(m + a + r + d).intersection(shelvedfiles) |
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472 if unsafe: |
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473 ui.warn(_('the following shelved files have been modified:\n')) |
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474 for f in sorted(unsafe): |
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475 ui.warn(' %s\n' % f) |
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476 ui.warn(_('you must commit, revert, or shelve your changes before you ' |
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477 'can proceed\n')) |
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478 raise util.Abort(_('cannot unshelve due to local changes\n')) |
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479 |
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480 wlock = lock = tr = None |
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481 try: |
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482 lock = repo.lock() |
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483 |
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484 tr = repo.transaction('unshelve', report=lambda x: None) |
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485 oldtiprev = len(repo) |
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486 try: |
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487 fp = shelvedfile(repo, basename, 'hg').opener() |
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488 gen = changegroup.readbundle(fp, fp.name) |
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489 repo.addchangegroup(gen, 'unshelve', 'bundle:' + fp.name) |
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490 nodes = [ctx.node() for ctx in repo.set('%d:', oldtiprev)] |
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491 phases.retractboundary(repo, phases.secret, nodes) |
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492 tr.close() |
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493 finally: |
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494 fp.close() |
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495 |
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496 tip = repo['tip'] |
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497 wctx = repo['.'] |
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498 ancestor = tip.ancestor(wctx) |
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499 |
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500 wlock = repo.wlock() |
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501 |
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502 if ancestor.node() != wctx.node(): |
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503 conflicts = hg.merge(repo, tip.node(), force=True, remind=False) |
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504 ms = merge.mergestate(repo) |
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505 stripnodes = [repo.changelog.node(rev) |
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506 for rev in xrange(oldtiprev, len(repo))] |
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507 if conflicts: |
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508 shelvedstate.save(repo, basename, stripnodes) |
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509 # Fix up the dirstate entries of files from the second |
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510 # parent as if we were not merging, except for those |
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511 # with unresolved conflicts. |
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512 parents = repo.parents() |
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513 revertfiles = set(parents[1].files()).difference(ms) |
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514 cmdutil.revert(ui, repo, parents[1], |
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515 (parents[0].node(), nullid), |
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516 *revertfiles, **{'no_backup': True}) |
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517 raise error.InterventionRequired( |
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518 _("unresolved conflicts (see 'hg resolve', then " |
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519 "'hg unshelve --continue')")) |
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520 finishmerge(ui, repo, ms, stripnodes, basename, opts) |
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521 else: |
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522 parent = tip.parents()[0] |
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523 hg.update(repo, parent.node()) |
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524 cmdutil.revert(ui, repo, tip, repo.dirstate.parents(), *tip.files(), |
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525 **{'no_backup': True}) |
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526 |
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527 prevquiet = ui.quiet |
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528 ui.quiet = True |
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529 try: |
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530 repo.rollback(force=True) |
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531 finally: |
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532 ui.quiet = prevquiet |
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533 |
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534 unshelvecleanup(ui, repo, basename, opts) |
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535 finally: |
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536 if tr: |
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537 tr.release() |
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538 lockmod.release(lock, wlock) |
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539 |
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540 @command('shelve', |
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541 [('A', 'addremove', None, |
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542 _('mark new/missing files as added/removed before shelving')), |
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543 ('', 'cleanup', None, |
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544 _('delete all shelved changes')), |
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545 ('', 'date', '', |
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546 _('shelve with the specified commit date'), _('DATE')), |
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547 ('d', 'delete', None, |
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|
548 _('delete the named shelved change(s)')), |
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549 ('l', 'list', None, |
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550 _('list current shelves')), |
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551 ('m', 'message', '', |
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552 _('use text as shelve message'), _('TEXT')), |
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553 ('n', 'name', '', |
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554 _('use the given name for the shelved commit'), _('NAME')), |
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555 ('p', 'patch', None, |
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|
556 _('show patch')), |
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557 ('', 'stat', None, |
49d4919d21c2
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|
558 _('output diffstat-style summary of changes'))], |
49d4919d21c2
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559 _('hg shelve')) |
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|
560 def shelvecmd(ui, repo, *pats, **opts): |
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561 '''save and set aside changes from the working directory |
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|
562 |
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563 Shelving takes files that "hg status" reports as not clean, saves |
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|
564 the modifications to a bundle (a shelved change), and reverts the |
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565 files so that their state in the working directory becomes clean. |
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566 |
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567 To restore these changes to the working directory, using "hg |
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|
568 unshelve"; this will work even if you switch to a different |
49d4919d21c2
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|
569 commit. |
49d4919d21c2
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|
570 |
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|
571 When no files are specified, "hg shelve" saves all not-clean |
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572 files. If specific files or directories are named, only changes to |
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573 those files are shelved. |
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|
574 |
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|
575 Each shelved change has a name that makes it easier to find later. |
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|
576 The name of a shelved change defaults to being based on the active |
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577 bookmark, or if there is no active bookmark, the current named |
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|
578 branch. To specify a different name, use ``--name``. |
49d4919d21c2
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|
579 |
49d4919d21c2
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|
580 To see a list of existing shelved changes, use the ``--list`` |
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|
581 option. For each shelved change, this will print its name, age, |
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|
582 and description; use ``--patch`` or ``--stat`` for more details. |
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583 |
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584 To delete specific shelved changes, use ``--delete``. To delete |
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585 all shelved changes, use ``--cleanup``. |
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586 ''' |
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587 cmdutil.checkunfinished(repo) |
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588 |
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589 def checkopt(opt, incompatible): |
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590 if opts[opt]: |
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591 for i in incompatible.split(): |
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592 if opts[i]: |
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593 raise util.Abort(_("options '--%s' and '--%s' may not be " |
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594 "used together") % (opt, i)) |
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595 return True |
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596 if checkopt('cleanup', 'addremove delete list message name patch stat'): |
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597 if pats: |
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598 raise util.Abort(_("cannot specify names when using '--cleanup'")) |
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599 return cleanupcmd(ui, repo) |
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600 elif checkopt('delete', 'addremove cleanup list message name patch stat'): |
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601 return deletecmd(ui, repo, pats) |
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602 elif checkopt('list', 'addremove cleanup delete message name'): |
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603 return listcmd(ui, repo, pats, opts) |
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604 else: |
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605 for i in ('patch', 'stat'): |
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606 if opts[i]: |
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607 raise util.Abort(_("option '--%s' may not be " |
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608 "used when shelving a change") % (i,)) |
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609 return createcmd(ui, repo, pats, opts) |
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610 |
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611 def extsetup(ui): |
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612 cmdutil.unfinishedstates.append( |
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613 [shelvedstate._filename, False, True, _('unshelve already in progress'), |
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614 _("use 'hg unshelve --continue' or 'hg unshelve --abort'")]) |