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@@ -1,417 +1,417 b'' | |||
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1 | 1 | # merge.py - directory-level update/merge handling for Mercurial |
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2 | 2 | # |
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3 | 3 | # Copyright 2006 Matt Mackall <mpm@selenic.com> |
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4 | 4 | # |
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5 | 5 | # This software may be used and distributed according to the terms |
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6 | 6 | # of the GNU General Public License, incorporated herein by reference. |
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7 | 7 | |
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8 | 8 | from node import * |
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9 | 9 | from i18n import gettext as _ |
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10 | 10 | from demandload import * |
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11 | 11 | demandload(globals(), "errno util os tempfile") |
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12 | 12 | |
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13 | 13 | def filemerge(repo, fw, fo, wctx, mctx): |
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14 | 14 | """perform a 3-way merge in the working directory |
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15 | 15 | |
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16 | 16 | fw = filename in the working directory |
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17 | 17 | fo = filename in other parent |
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18 | 18 | wctx, mctx = working and merge changecontexts |
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19 | 19 | """ |
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20 | 20 | |
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21 | 21 | def temp(prefix, ctx): |
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22 | 22 | pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) |
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23 | 23 | (fd, name) = tempfile.mkstemp(prefix=pre) |
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24 | 24 | f = os.fdopen(fd, "wb") |
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25 | 25 | repo.wwrite(ctx.path(), ctx.data(), f) |
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26 | 26 | f.close() |
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27 | 27 | return name |
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28 | 28 | |
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29 | 29 | fcm = wctx.filectx(fw) |
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30 | 30 | fco = mctx.filectx(fo) |
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31 | 31 | |
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32 | 32 | if not fco.cmp(fcm.data()): # files identical? |
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33 | 33 | return None |
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34 | 34 | |
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35 | 35 | fca = fcm.ancestor(fco) |
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36 | 36 | if not fca: |
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37 | 37 | fca = repo.filectx(fw, fileid=nullrev) |
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38 | 38 | a = repo.wjoin(fw) |
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39 | 39 | b = temp("base", fca) |
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40 | 40 | c = temp("other", fco) |
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41 | 41 | |
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42 | 42 | if fw != fo: |
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43 | 43 | repo.ui.status(_("merging %s and %s\n") % (fw, fo)) |
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44 | 44 | else: |
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45 | 45 | repo.ui.status(_("merging %s\n") % fw) |
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46 | 46 | |
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47 | 47 | repo.ui.debug(_("my %s other %s ancestor %s\n") % (fcm, fco, fca)) |
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48 | 48 | |
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49 | 49 | cmd = (os.environ.get("HGMERGE") or repo.ui.config("ui", "merge") |
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50 | 50 | or "hgmerge") |
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51 | 51 | r = util.system('%s "%s" "%s" "%s"' % (cmd, a, b, c), cwd=repo.root, |
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52 | 52 | environ={'HG_FILE': fw, |
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53 | 53 | 'HG_MY_NODE': str(wctx.parents()[0]), |
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54 | 54 | 'HG_OTHER_NODE': str(mctx)}) |
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55 | 55 | if r: |
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56 | 56 | repo.ui.warn(_("merging %s failed!\n") % fw) |
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57 | 57 | |
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58 | 58 | os.unlink(b) |
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59 | 59 | os.unlink(c) |
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60 | 60 | return r |
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61 | 61 | |
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62 | 62 | def checkunknown(wctx, mctx): |
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63 | 63 | "check for collisions between unknown files and files in mctx" |
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64 | 64 | man = mctx.manifest() |
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65 | 65 | for f in wctx.unknown(): |
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66 | 66 | if f in man: |
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67 | 67 | if mctx.filectx(f).cmp(wctx.filectx(f).data()): |
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68 | 68 | raise util.Abort(_("untracked local file '%s' differs"\ |
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69 | 69 | " from remote version") % f) |
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70 | 70 | |
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71 | 71 | def forgetremoved(wctx, mctx): |
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72 | 72 | """ |
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73 | 73 | Forget removed files |
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74 | 74 | |
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75 | 75 | If we're jumping between revisions (as opposed to merging), and if |
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76 | 76 | neither the working directory nor the target rev has the file, |
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77 | 77 | then we need to remove it from the dirstate, to prevent the |
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78 | 78 | dirstate from listing the file when it is no longer in the |
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79 | 79 | manifest. |
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80 | 80 | """ |
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81 | 81 | |
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82 | 82 | action = [] |
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83 | 83 | man = mctx.manifest() |
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84 | 84 | for f in wctx.deleted() + wctx.removed(): |
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85 | 85 | if f not in man: |
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86 | 86 | action.append((f, "f")) |
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87 | 87 | |
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88 | 88 | return action |
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89 | 89 | |
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90 | 90 | def nonoverlap(d1, d2, d3): |
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91 | 91 | "Return list of elements in d1 not in d2 or d3" |
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92 | 92 | |
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93 | 93 | l = [] |
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94 | 94 | for d in d1: |
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95 | 95 | if d not in d3 and d not in d2: |
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96 | 96 | l.append(d) |
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97 | 97 | |
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98 | 98 | l.sort() |
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99 | 99 | return l |
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100 | 100 | |
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101 | 101 | def findold(fctx, limit): |
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102 | 102 | "find files that path was copied from, back to linkrev limit" |
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103 | 103 | |
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104 | 104 | old = {} |
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105 | 105 | orig = fctx.path() |
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106 | 106 | visit = [fctx] |
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107 | 107 | while visit: |
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108 | 108 | fc = visit.pop() |
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109 | 109 | if fc.rev() < limit: |
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110 | 110 | continue |
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111 | 111 | if fc.path() != orig and fc.path() not in old: |
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112 | 112 | old[fc.path()] = 1 |
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113 | 113 | visit += fc.parents() |
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114 | 114 | |
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115 | 115 | old = old.keys() |
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116 | 116 | old.sort() |
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117 | 117 | return old |
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118 | 118 | |
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119 | 119 | def findcopies(repo, m1, m2, ma, limit): |
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120 | 120 | """ |
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121 | 121 | Find moves and copies between m1 and m2 back to limit linkrev |
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122 | 122 | """ |
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123 | 123 | |
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124 | 124 | if not repo.ui.configbool("merge", "followcopies", True): |
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125 | 125 | return {} |
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126 | 126 | |
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127 | 127 | # avoid silly behavior for update from empty dir |
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128 | if not m1: | |
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128 | if not m1 or not m2 or not ma: | |
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129 | 129 | return {} |
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130 | 130 | |
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131 | 131 | dcopies = repo.dirstate.copies() |
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132 | 132 | copy = {} |
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133 | 133 | u1 = nonoverlap(m1, m2, ma) |
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134 | 134 | u2 = nonoverlap(m2, m1, ma) |
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135 | 135 | ctx = util.cachefunc(lambda f, n: repo.filectx(f, fileid=n[:20])) |
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136 | 136 | |
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137 | 137 | def checkpair(c, f2, man): |
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138 | 138 | ''' check if an apparent pair actually matches ''' |
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139 | 139 | if f2 not in man: |
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140 | 140 | return |
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141 | 141 | c2 = ctx(f2, man[f2]) |
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142 | 142 | ca = c.ancestor(c2) |
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143 | 143 | if not ca or c == ca or c2 == ca: |
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144 | 144 | return |
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145 | 145 | if ca.path() == c.path() or ca.path() == c2.path(): |
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146 | 146 | copy[c.path()] = f2 |
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147 | 147 | |
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148 | 148 | for f in u1: |
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149 | 149 | c = ctx(dcopies.get(f, f), m1[f]) |
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150 | 150 | for of in findold(c, limit): |
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151 | 151 | checkpair(c, of, m2) |
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152 | 152 | |
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153 | 153 | for f in u2: |
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154 | 154 | c = ctx(f, m2[f]) |
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155 | 155 | for of in findold(c, limit): |
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156 | 156 | checkpair(c, of, m1) |
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157 | 157 | |
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158 | 158 | return copy |
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159 | 159 | |
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160 | 160 | def manifestmerge(repo, p1, p2, pa, overwrite, partial): |
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161 | 161 | """ |
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162 | 162 | Merge p1 and p2 with ancestor ma and generate merge action list |
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163 | 163 | |
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164 | 164 | overwrite = whether we clobber working files |
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165 | 165 | partial = function to filter file lists |
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166 | 166 | """ |
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167 | 167 | |
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168 | 168 | repo.ui.note(_("resolving manifests\n")) |
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169 | 169 | repo.ui.debug(_(" overwrite %s partial %s\n") % (overwrite, bool(partial))) |
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170 | 170 | repo.ui.debug(_(" ancestor %s local %s remote %s\n") % (pa, p1, p2)) |
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171 | 171 | |
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172 | 172 | m1 = p1.manifest() |
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173 | 173 | m2 = p2.manifest() |
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174 | 174 | ma = pa.manifest() |
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175 | 175 | backwards = (pa == p2) |
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176 | 176 | action = [] |
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177 | 177 | copy = {} |
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178 | 178 | |
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179 | 179 | def fmerge(f, f2=None, fa=None): |
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180 | 180 | """merge executable flags""" |
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181 | 181 | if not f2: |
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182 | 182 | f2 = f |
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183 | 183 | fa = f |
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184 | 184 | a, b, c = ma.execf(fa), m1.execf(f), m2.execf(f2) |
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185 | 185 | return ((a^b) | (a^c)) ^ a |
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186 | 186 | |
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187 | 187 | def act(msg, m, f, *args): |
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188 | 188 | repo.ui.debug(" %s: %s -> %s\n" % (f, msg, m)) |
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189 | 189 | action.append((f, m) + args) |
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190 | 190 | |
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191 |
if |
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191 | if not (backwards or overwrite): | |
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192 | 192 | copy = findcopies(repo, m1, m2, ma, pa.rev()) |
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193 | 193 | copied = dict.fromkeys(copy.values()) |
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194 | 194 | |
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195 | 195 | # Compare manifests |
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196 | 196 | for f, n in m1.iteritems(): |
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197 | 197 | if partial and not partial(f): |
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198 | 198 | continue |
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199 | 199 | if f in m2: |
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200 | 200 | # are files different? |
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201 | 201 | if n != m2[f]: |
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202 | 202 | a = ma.get(f, nullid) |
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203 | 203 | # are both different from the ancestor? |
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204 | 204 | if not overwrite and n != a and m2[f] != a: |
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205 | 205 | act("versions differ", "m", f, f, f, fmerge(f), False) |
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206 | 206 | # are we clobbering? |
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207 | 207 | # is remote's version newer? |
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208 | 208 | # or are we going back in time and clean? |
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209 | 209 | elif overwrite or m2[f] != a or (backwards and not n[20:]): |
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210 | 210 | act("remote is newer", "g", f, m2.execf(f)) |
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211 | 211 | # local is newer, not overwrite, check mode bits |
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212 | 212 | elif fmerge(f) != m1.execf(f): |
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213 | 213 | act("update permissions", "e", f, m2.execf(f)) |
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214 | 214 | # contents same, check mode bits |
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215 | 215 | elif m1.execf(f) != m2.execf(f): |
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216 | 216 | if overwrite or fmerge(f) != m1.execf(f): |
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217 | 217 | act("update permissions", "e", f, m2.execf(f)) |
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218 | 218 | elif f in copied: |
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219 | 219 | continue |
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220 | 220 | elif f in copy: |
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221 | 221 | f2 = copy[f] |
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222 | 222 | if f2 in m1: # case 2 A,B/B/B |
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223 | 223 | act("local copied to " + f2, "m", |
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224 | 224 | f, f2, f, fmerge(f, f2, f2), False) |
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225 | 225 | else: # case 4,21 A/B/B |
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226 | 226 | act("local moved to " + f2, "m", |
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227 | 227 | f, f2, f, fmerge(f, f2, f2), False) |
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228 | 228 | elif f in ma: |
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229 | 229 | if n != ma[f] and not overwrite: |
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230 | 230 | if repo.ui.prompt( |
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231 | 231 | (_(" local changed %s which remote deleted\n") % f) + |
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232 | 232 | _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("d"): |
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233 | 233 | act("prompt delete", "r", f) |
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234 | 234 | else: |
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235 | 235 | act("other deleted", "r", f) |
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236 | 236 | else: |
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237 | 237 | # file is created on branch or in working directory |
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238 | 238 | if (overwrite and n[20:] != "u") or (backwards and not n[20:]): |
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239 | 239 | act("remote deleted", "r", f) |
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240 | 240 | |
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241 | 241 | for f, n in m2.iteritems(): |
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242 | 242 | if partial and not partial(f): |
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243 | 243 | continue |
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244 | 244 | if f in m1: |
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245 | 245 | continue |
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246 | 246 | if f in copied: |
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247 | 247 | continue |
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248 | 248 | if f in copy: |
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249 | 249 | f2 = copy[f] |
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250 | 250 | if f2 in m2: # rename case 1, A/A,B/A |
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251 | 251 | act("remote copied to " + f, "m", |
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252 | 252 | f2, f, f, fmerge(f2, f, f2), False) |
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253 | 253 | else: # case 3,20 A/B/A |
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254 | 254 | act("remote moved to " + f, "m", |
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255 | 255 | f2, f, f, fmerge(f2, f, f2), True) |
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256 | 256 | elif f in ma: |
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257 | 257 | if overwrite or backwards: |
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258 | 258 | act("recreating", "g", f, m2.execf(f)) |
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259 | 259 | elif n != ma[f]: |
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260 | 260 | if repo.ui.prompt( |
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261 | 261 | (_("remote changed %s which local deleted\n") % f) + |
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262 | 262 | _("(k)eep or (d)elete?"), _("[kd]"), _("k")) == _("k"): |
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263 | 263 | act("prompt recreating", "g", f, m2.execf(f)) |
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264 | 264 | else: |
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265 | 265 | act("remote created", "g", f, m2.execf(f)) |
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266 | 266 | |
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267 | 267 | return action |
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268 | 268 | |
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269 | 269 | def applyupdates(repo, action, wctx, mctx): |
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270 | 270 | "apply the merge action list to the working directory" |
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271 | 271 | |
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272 | 272 | updated, merged, removed, unresolved = 0, 0, 0, 0 |
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273 | 273 | action.sort() |
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274 | 274 | for a in action: |
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275 | 275 | f, m = a[:2] |
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276 | 276 | if f[0] == "/": |
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277 | 277 | continue |
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278 | 278 | if m == "r": # remove |
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279 | 279 | repo.ui.note(_("removing %s\n") % f) |
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280 | 280 | util.audit_path(f) |
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281 | 281 | try: |
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282 | 282 | util.unlink(repo.wjoin(f)) |
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283 | 283 | except OSError, inst: |
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284 | 284 | if inst.errno != errno.ENOENT: |
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285 | 285 | repo.ui.warn(_("update failed to remove %s: %s!\n") % |
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286 | 286 | (f, inst.strerror)) |
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287 | 287 | removed += 1 |
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288 | 288 | elif m == "m": # merge |
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289 | 289 | f2, fd, flag, move = a[2:] |
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290 | 290 | r = filemerge(repo, f, f2, wctx, mctx) |
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291 | 291 | if r > 0: |
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292 | 292 | unresolved += 1 |
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293 | 293 | else: |
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294 | 294 | if r is None: |
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295 | 295 | updated += 1 |
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296 | 296 | else: |
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297 | 297 | merged += 1 |
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298 | 298 | if f != fd: |
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299 | 299 | repo.ui.debug(_("copying %s to %s\n") % (f, fd)) |
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300 | 300 | repo.wwrite(fd, repo.wread(f)) |
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301 | 301 | if move: |
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302 | 302 | repo.ui.debug(_("removing %s\n") % f) |
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303 | 303 | os.unlink(repo.wjoin(f)) |
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304 | 304 | util.set_exec(repo.wjoin(fd), flag) |
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305 | 305 | elif m == "g": # get |
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306 | 306 | flag = a[2] |
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307 | 307 | repo.ui.note(_("getting %s\n") % f) |
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308 | 308 | t = mctx.filectx(f).data() |
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309 | 309 | repo.wwrite(f, t) |
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310 | 310 | util.set_exec(repo.wjoin(f), flag) |
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311 | 311 | updated += 1 |
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312 | 312 | elif m == "e": # exec |
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313 | 313 | flag = a[2] |
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314 | 314 | util.set_exec(repo.wjoin(f), flag) |
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315 | 315 | |
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316 | 316 | return updated, merged, removed, unresolved |
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317 | 317 | |
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318 | 318 | def recordupdates(repo, action, branchmerge): |
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319 | 319 | "record merge actions to the dirstate" |
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320 | 320 | |
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321 | 321 | for a in action: |
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322 | 322 | f, m = a[:2] |
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323 | 323 | if m == "r": # remove |
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324 | 324 | if branchmerge: |
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325 | 325 | repo.dirstate.update([f], 'r') |
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326 | 326 | else: |
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327 | 327 | repo.dirstate.forget([f]) |
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328 | 328 | elif m == "f": # forget |
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329 | 329 | repo.dirstate.forget([f]) |
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330 | 330 | elif m == "g": # get |
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331 | 331 | if branchmerge: |
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332 | 332 | repo.dirstate.update([f], 'n', st_mtime=-1) |
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333 | 333 | else: |
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334 | 334 | repo.dirstate.update([f], 'n') |
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335 | 335 | elif m == "m": # merge |
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336 | 336 | f2, fd, flag, move = a[2:] |
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337 | 337 | if branchmerge: |
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338 | 338 | # We've done a branch merge, mark this file as merged |
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339 | 339 | # so that we properly record the merger later |
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340 | 340 | repo.dirstate.update([fd], 'm') |
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341 | 341 | if f != f2: # copy/rename |
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342 | 342 | if move: |
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343 | 343 | repo.dirstate.update([f], 'r') |
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344 | 344 | if f != fd: |
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345 | 345 | repo.dirstate.copy(f, fd) |
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346 | 346 | else: |
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347 | 347 | repo.dirstate.copy(f2, fd) |
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348 | 348 | else: |
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349 | 349 | # We've update-merged a locally modified file, so |
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350 | 350 | # we set the dirstate to emulate a normal checkout |
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351 | 351 | # of that file some time in the past. Thus our |
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352 | 352 | # merge will appear as a normal local file |
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353 | 353 | # modification. |
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354 | 354 | repo.dirstate.update([fd], 'n', st_size=-1, st_mtime=-1) |
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355 | 355 | if move: |
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356 | 356 | repo.dirstate.forget([f]) |
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357 | 357 | |
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358 | 358 | def update(repo, node, branchmerge, force, partial, wlock): |
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359 | 359 | """ |
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360 | 360 | Perform a merge between the working directory and the given node |
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361 | 361 | |
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362 | 362 | branchmerge = whether to merge between branches |
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363 | 363 | force = whether to force branch merging or file overwriting |
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364 | 364 | partial = a function to filter file lists (dirstate not updated) |
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365 | 365 | wlock = working dir lock, if already held |
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366 | 366 | """ |
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367 | 367 | |
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368 | 368 | if not wlock: |
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369 | 369 | wlock = repo.wlock() |
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370 | 370 | |
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371 | 371 | overwrite = force and not branchmerge |
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372 | 372 | forcemerge = force and branchmerge |
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373 | 373 | wc = repo.workingctx() |
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374 | 374 | pl = wc.parents() |
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375 | 375 | p1, p2 = pl[0], repo.changectx(node) |
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376 | 376 | pa = p1.ancestor(p2) |
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377 | 377 | fp1, fp2, xp1, xp2 = p1.node(), p2.node(), str(p1), str(p2) |
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378 | 378 | |
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379 | 379 | ### check phase |
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380 | 380 | if not overwrite and len(pl) > 1: |
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381 | 381 | raise util.Abort(_("outstanding uncommitted merges")) |
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382 | 382 | if pa == p1 or pa == p2: # is there a linear path from p1 to p2? |
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383 | 383 | if branchmerge: |
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384 | 384 | raise util.Abort(_("there is nothing to merge, just use " |
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385 | 385 | "'hg update' or look at 'hg heads'")) |
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386 | 386 | elif not (overwrite or branchmerge): |
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387 | 387 | raise util.Abort(_("update spans branches, use 'hg merge' " |
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388 | 388 | "or 'hg update -C' to lose changes")) |
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389 | 389 | if branchmerge and not forcemerge: |
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390 | 390 | if wc.files(): |
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391 | 391 | raise util.Abort(_("outstanding uncommitted changes")) |
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392 | 392 | |
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393 | 393 | ### calculate phase |
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394 | 394 | action = [] |
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395 | 395 | if not force: |
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396 | 396 | checkunknown(wc, p2) |
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397 | 397 | if not branchmerge: |
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398 | 398 | action += forgetremoved(wc, p2) |
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399 | 399 | action += manifestmerge(repo, wc, p2, pa, overwrite, partial) |
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400 | 400 | |
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401 | 401 | ### apply phase |
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402 | 402 | if not branchmerge: # just jump to the new rev |
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403 | 403 | fp1, fp2, xp1, xp2 = fp2, nullid, xp2, '' |
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404 | 404 | if not partial: |
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405 | 405 | repo.hook('preupdate', throw=True, parent1=xp1, parent2=xp2) |
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406 | 406 | |
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407 | 407 | stats = applyupdates(repo, action, wc, p2) |
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408 | 408 | |
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409 | 409 | if not partial: |
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410 | 410 | recordupdates(repo, action, branchmerge) |
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411 | 411 | repo.dirstate.setparents(fp1, fp2) |
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412 | 412 | repo.hook('update', parent1=xp1, parent2=xp2, error=stats[3]) |
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413 | 413 | if not branchmerge: |
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414 | 414 | repo.opener("branch", "w").write(p2.branch() + "\n") |
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415 | 415 | |
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416 | 416 | return stats |
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417 | 417 |
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