Mercurial > hg
annotate mercurial/merge.py @ 2988:63c3a1921a67
Add ui.strict config item.
This turns off command matching by unambiguous prefix, and is a good
thing if you want to write future-proof scripts.
This fixes issue 314.
author | Bryan O'Sullivan <bos@serpentine.com> |
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date | Mon, 21 Aug 2006 21:59:29 -0700 |
parents | 8743188f4d2e |
children | 545d33aa3f82 |
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1 # merge.py - directory-level update/merge handling for Mercurial |
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2 # |
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3 # Copyright 2006 Matt Mackall <mpm@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms |
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6 # of the GNU General Public License, incorporated herein by reference. |
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7 |
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8 from node import * |
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9 from i18n import gettext as _ |
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10 from demandload import * |
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11 demandload(globals(), "util os tempfile") |
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12 |
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13 def fmerge(f, local, other, ancestor): |
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14 """merge executable flags""" |
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15 a, b, c = ancestor.execf(f), local.execf(f), other.execf(f) |
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16 return ((a^b) | (a^c)) ^ a |
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17 |
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18 def merge3(repo, fn, my, other, p1, p2): |
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19 """perform a 3-way merge in the working directory""" |
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20 |
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21 def temp(prefix, node): |
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22 pre = "%s~%s." % (os.path.basename(fn), prefix) |
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23 (fd, name) = tempfile.mkstemp(prefix=pre) |
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24 f = os.fdopen(fd, "wb") |
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25 repo.wwrite(fn, fl.read(node), f) |
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26 f.close() |
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27 return name |
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28 |
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29 fl = repo.file(fn) |
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30 base = fl.ancestor(my, other) |
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31 a = repo.wjoin(fn) |
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32 b = temp("base", base) |
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33 c = temp("other", other) |
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34 |
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35 repo.ui.note(_("resolving %s\n") % fn) |
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36 repo.ui.debug(_("file %s: my %s other %s ancestor %s\n") % |
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37 (fn, short(my), short(other), short(base))) |
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38 |
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39 cmd = (os.environ.get("HGMERGE") or repo.ui.config("ui", "merge") |
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40 or "hgmerge") |
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41 r = util.system('%s "%s" "%s" "%s"' % (cmd, a, b, c), cwd=repo.root, |
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42 environ={'HG_FILE': fn, |
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43 'HG_MY_NODE': p1, |
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44 'HG_OTHER_NODE': p2, |
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45 'HG_FILE_MY_NODE': hex(my), |
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46 'HG_FILE_OTHER_NODE': hex(other), |
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47 'HG_FILE_BASE_NODE': hex(base)}) |
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48 if r: |
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49 repo.ui.warn(_("merging %s failed!\n") % fn) |
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50 |
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51 os.unlink(b) |
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52 os.unlink(c) |
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53 return r |
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54 |
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55 def update(repo, node, branchmerge=False, force=False, partial=None, |
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56 wlock=None, show_stats=True, remind=True): |
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57 |
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58 overwrite = force and not branchmerge |
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59 forcemerge = force and branchmerge |
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60 |
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61 if not wlock: |
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62 wlock = repo.wlock() |
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63 |
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64 ### check phase |
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65 |
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66 pl = repo.dirstate.parents() |
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67 if not overwrite and pl[1] != nullid: |
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68 raise util.Abort(_("outstanding uncommitted merges")) |
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69 |
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70 p1, p2 = pl[0], node |
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71 pa = repo.changelog.ancestor(p1, p2) |
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72 |
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73 # is there a linear path from p1 to p2? |
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74 linear_path = (pa == p1 or pa == p2) |
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75 if branchmerge and linear_path: |
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76 raise util.Abort(_("there is nothing to merge, just use " |
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77 "'hg update' or look at 'hg heads'")) |
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78 |
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79 if not overwrite and not linear_path and not branchmerge: |
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80 raise util.Abort(_("update spans branches, use 'hg merge' " |
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81 "or 'hg update -C' to lose changes")) |
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82 |
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83 modified, added, removed, deleted, unknown = repo.status()[:5] |
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84 if branchmerge and not forcemerge: |
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85 if modified or added or removed: |
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86 raise util.Abort(_("outstanding uncommitted changes")) |
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87 |
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88 m1n = repo.changelog.read(p1)[0] |
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89 m2n = repo.changelog.read(p2)[0] |
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90 man = repo.manifest.ancestor(m1n, m2n) |
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91 m1 = repo.manifest.read(m1n) |
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92 m2 = repo.manifest.read(m2n).copy() |
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93 ma = repo.manifest.read(man) |
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94 |
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95 if not force: |
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96 for f in unknown: |
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97 if f in m2: |
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98 if repo.file(f).cmp(m2[f], repo.wread(f)): |
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99 raise util.Abort(_("'%s' already exists in the working" |
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100 " dir and differs from remote") % f) |
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101 |
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102 # resolve the manifest to determine which files |
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103 # we care about merging |
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104 repo.ui.note(_("resolving manifests\n")) |
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105 repo.ui.debug(_(" overwrite %s branchmerge %s partial %s linear %s\n") % |
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107 repo.ui.debug(_(" ancestor %s local %s remote %s\n") % |
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108 (short(man), short(m1n), short(m2n))) |
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109 |
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110 merge = {} |
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111 get = {} |
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112 remove = [] |
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113 forget = [] |
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114 |
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115 # construct a working dir manifest |
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116 mw = m1.copy() |
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117 umap = dict.fromkeys(unknown) |
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118 |
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119 for f in added + modified + unknown: |
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120 mw[f] = "" |
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121 # is the wfile new and matches m2? |
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122 if (f not in m1 and f in m2 and |
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123 not repo.file(f).cmp(m2[f], repo.wread(f))): |
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124 mw[f] = m2[f] |
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125 |
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126 mw.set(f, util.is_exec(repo.wjoin(f), mw.execf(f))) |
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127 |
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128 for f in deleted + removed: |
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129 if f in mw: |
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130 del mw[f] |
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131 |
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132 # If we're jumping between revisions (as opposed to merging), |
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133 # and if neither the working directory nor the target rev has |
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134 # the file, then we need to remove it from the dirstate, to |
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135 # prevent the dirstate from listing the file when it is no |
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136 # longer in the manifest. |
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137 if linear_path and f not in m2: |
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138 forget.append(f) |
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139 |
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140 # Compare manifests |
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141 for f, n in mw.iteritems(): |
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142 if partial and not partial(f): |
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143 continue |
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144 if f in m2: |
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145 s = 0 |
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146 |
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147 # are files different? |
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148 if n != m2[f]: |
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149 a = ma.get(f, nullid) |
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150 # are both different from the ancestor? |
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151 if n != a and m2[f] != a: |
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152 repo.ui.debug(_(" %s versions differ, resolve\n") % f) |
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153 merge[f] = (fmerge(f, mw, m2, ma), m1.get(f, nullid), m2[f]) |
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154 s = 1 |
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155 # are we clobbering? |
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156 # is remote's version newer? |
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157 # or are we going back in time? |
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158 elif overwrite or m2[f] != a or (p2 == pa and mw[f] == m1[f]): |
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159 repo.ui.debug(_(" remote %s is newer, get\n") % f) |
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160 get[f] = (m2.execf(f), m2[f]) |
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161 s = 1 |
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162 elif f in umap or f in added: |
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163 # this unknown file is the same as the checkout |
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164 # we need to reset the dirstate if the file was added |
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165 get[f] = (m2.execf(f), m2[f]) |
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166 |
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167 if not s and mw.execf(f) != m2.execf(f): |
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168 if overwrite: |
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169 repo.ui.debug(_(" updating permissions for %s\n") % f) |
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170 util.set_exec(repo.wjoin(f), m2.execf(f)) |
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171 else: |
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172 if fmerge(f, mw, m2, ma) != mw.execf(f): |
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173 repo.ui.debug(_(" updating permissions for %s\n") |
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174 % f) |
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175 util.set_exec(repo.wjoin(f), mode) |
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176 del m2[f] |
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177 elif f in ma: |
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178 if n != ma[f]: |
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179 r = _("d") |
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180 if not overwrite and (linear_path or branchmerge): |
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181 r = repo.ui.prompt( |
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182 (_(" local changed %s which remote deleted\n") % f) + |
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183 _("(k)eep or (d)elete?"), _("[kd]"), _("k")) |
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184 if r == _("d"): |
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185 remove.append(f) |
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186 else: |
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187 repo.ui.debug(_("other deleted %s\n") % f) |
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188 remove.append(f) # other deleted it |
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189 else: |
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190 # file is created on branch or in working directory |
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191 if overwrite and f not in umap: |
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192 repo.ui.debug(_("remote deleted %s, clobbering\n") % f) |
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193 remove.append(f) |
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194 elif n == m1.get(f, nullid): # same as parent |
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195 if p2 == pa: # going backwards? |
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196 repo.ui.debug(_("remote deleted %s\n") % f) |
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197 remove.append(f) |
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198 else: |
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199 repo.ui.debug(_("local modified %s, keeping\n") % f) |
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200 else: |
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201 repo.ui.debug(_("working dir created %s, keeping\n") % f) |
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202 |
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203 for f, n in m2.iteritems(): |
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204 if partial and not partial(f): |
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205 continue |
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206 if f[0] == "/": |
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207 continue |
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208 if f in ma and n != ma[f]: |
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209 r = _("k") |
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210 if not overwrite and (linear_path or branchmerge): |
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211 r = repo.ui.prompt( |
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212 (_("remote changed %s which local deleted\n") % f) + |
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213 _("(k)eep or (d)elete?"), _("[kd]"), _("k")) |
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214 if r == _("k"): |
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215 get[f] = (m2.execf(f), n) |
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216 elif f not in ma: |
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217 repo.ui.debug(_("remote created %s\n") % f) |
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218 get[f] = (m2.execf(f), n) |
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219 else: |
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220 if overwrite or p2 == pa: # going backwards? |
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221 repo.ui.debug(_("local deleted %s, recreating\n") % f) |
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222 get[f] = (m2.execf(f), n) |
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223 else: |
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224 repo.ui.debug(_("local deleted %s\n") % f) |
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225 |
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226 del mw, m1, m2, ma |
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227 |
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228 ### apply phase |
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229 |
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230 if overwrite: |
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231 for f in merge: |
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232 get[f] = merge[f][:2] |
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233 merge = {} |
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234 |
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235 if linear_path or overwrite: |
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236 # we don't need to do any magic, just jump to the new rev |
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237 p1, p2 = p2, nullid |
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238 |
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239 xp1 = hex(p1) |
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240 xp2 = hex(p2) |
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241 if p2 == nullid: xxp2 = '' |
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242 else: xxp2 = xp2 |
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243 |
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244 repo.hook('preupdate', throw=True, parent1=xp1, parent2=xxp2) |
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245 |
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246 # get the files we don't need to change |
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247 files = get.keys() |
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248 files.sort() |
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249 for f in files: |
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250 flag, node = get[f] |
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251 if f[0] == "/": |
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252 continue |
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253 repo.ui.note(_("getting %s\n") % f) |
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254 t = repo.file(f).read(node) |
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255 repo.wwrite(f, t) |
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256 util.set_exec(repo.wjoin(f), flag) |
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257 |
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258 # merge the tricky bits |
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259 unresolved = [] |
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260 files = merge.keys() |
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261 files.sort() |
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262 for f in files: |
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263 repo.ui.status(_("merging %s\n") % f) |
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264 flag, my, other = merge[f] |
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265 ret = merge3(repo, f, my, other, xp1, xp2) |
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266 if ret: |
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267 unresolved.append(f) |
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268 util.set_exec(repo.wjoin(f), flag) |
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269 |
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270 remove.sort() |
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271 for f in remove: |
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272 repo.ui.note(_("removing %s\n") % f) |
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273 util.audit_path(f) |
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274 try: |
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275 util.unlink(repo.wjoin(f)) |
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276 except OSError, inst: |
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277 if inst.errno != errno.ENOENT: |
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278 repo.ui.warn(_("update failed to remove %s: %s!\n") % |
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279 (f, inst.strerror)) |
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280 |
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281 # update dirstate |
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282 if not partial: |
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283 repo.dirstate.setparents(p1, p2) |
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284 repo.dirstate.forget(forget) |
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285 if branchmerge: |
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286 repo.dirstate.update(remove, 'r') |
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287 else: |
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288 repo.dirstate.forget(remove) |
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289 |
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290 files = get.keys() |
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291 files.sort() |
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292 for f in files: |
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293 if branchmerge: |
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294 repo.dirstate.update([f], 'n', st_mtime=-1) |
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295 else: |
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296 repo.dirstate.update([f], 'n') |
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297 |
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298 files = merge.keys() |
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299 files.sort() |
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300 for f in files: |
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301 if branchmerge: |
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302 # We've done a branch merge, mark this file as merged |
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303 # so that we properly record the merger later |
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304 repo.dirstate.update([f], 'm') |
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305 else: |
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306 # We've update-merged a locally modified file, so |
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307 # we set the dirstate to emulate a normal checkout |
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308 # of that file some time in the past. Thus our |
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309 # merge will appear as a normal local file |
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310 # modification. |
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311 fl = repo.file(f) |
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312 f_len = fl.size(fl.rev(other)) |
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313 repo.dirstate.update([f], 'n', st_size=f_len, st_mtime=-1) |
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314 |
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315 if show_stats: |
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316 stats = ((len(get), _("updated")), |
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317 (len(merge) - len(unresolved), _("merged")), |
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318 (len(remove), _("removed")), |
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319 (len(unresolved), _("unresolved"))) |
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320 note = ", ".join([_("%d files %s") % s for s in stats]) |
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321 repo.ui.status("%s\n" % note) |
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322 if not partial: |
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323 if branchmerge: |
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324 if unresolved: |
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325 repo.ui.status(_("There are unresolved merges," |
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326 " you can redo the full merge using:\n" |
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327 " hg update -C %s\n" |
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328 " hg merge %s\n" |
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329 % (repo.changelog.rev(p1), |
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330 repo.changelog.rev(p2)))) |
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332 repo.ui.status(_("(branch merge, don't forget to commit)\n")) |
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333 elif unresolved: |
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334 repo.ui.status(_("There are unresolved merges with" |
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335 " locally modified files.\n")) |
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336 |
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337 repo.hook('update', parent1=xp1, parent2=xxp2, error=len(unresolved)) |
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338 return len(unresolved) |
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339 |