Mercurial > hg
annotate tests/test-empty-group.t @ 26631:e077ce385609
localrepo: restore dirstate to one before rollbacking if not parent-gone
'localrepository.rollback()' explicilty restores dirstate, only if at
least one of current parents of the working directory is removed at
rollbacking (a.k.a "parent-gone").
After DirstateTransactionPlan, 'dirstate.write()' will cause marking
'.hg/dirstate' as a file to be restored at rollbacking.
https://mercurial.selenic.com/wiki/DirstateTransactionPlan
Then, 'transaction.rollback()' restores '.hg/dirstate' regardless of
parents of the working directory at that time, and this causes
unexpected dirstate changes if not "parent-gone" (e.g. "hg update" to
another branch after "hg commit" or so, then "hg rollback").
To avoid such situation, this patch restores dirstate to one before
rollbacking if not "parent-gone".
before:
b1. restore dirstate explicitly, if "parent-gone"
after:
a1. save dirstate before actual rollbacking via dirstateguard
a2. restore dirstate via 'transaction.rollback()'
a3. if "parent-gone"
- discard backup (a1)
- restore dirstate from 'undo.dirstate'
a4. otherwise, restore dirstate from backup (a1)
Even though restoring dirstate at (a3) after (a2) seems redundant,
this patch keeps this existing code path, because:
- it isn't ensured that 'dirstate.write()' was invoked at least once
while transaction running
If not, '.hg/dirstate' isn't restored at (a2).
In addition to it, rude 3rd party extension invoking
'dirstate.write()' without 'repo' while transaction running (see
subsequent patches for detail) may break consistency of a file
backup-ed by transaction.
- this patch mainly focuses on changes for DirstateTransactionPlan
Restoring dirstate at (a3) itself should be cheaper enough than
rollbacking itself. Redundancy will be removed in next step.
Newly added test is almost meaningless at this point. It will be used
to detect regression while implementing delayed dirstate write out.
author | FUJIWARA Katsunori <foozy@lares.dti.ne.jp> |
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date | Tue, 13 Oct 2015 12:25:43 -0700 |
parents | 301725c3df9a |
children | eb586ed5d8ce |
rev | line source |
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5 # |/\| | \ |
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7 # \ / \ / |
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8 # 0 0 |
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9 # |
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10 # if the result of the merge of 1 and 2 |
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11 # is the same in 3 and 4, no new manifest |
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12 # will be created and the manifest group |
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13 # will be empty during the pull |
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14 # |
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15 # (plus we test a failure where outgoing |
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16 # wrongly reported the number of csets) |
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17 |
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18 $ hg init a |
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19 $ cd a |
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20 $ touch init |
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21 $ hg ci -A -m 0 |
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22 adding init |
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23 $ touch x y |
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24 $ hg ci -A -m 1 |
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25 adding x |
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26 adding y |
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27 |
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28 $ hg update 0 |
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29 0 files updated, 0 files merged, 2 files removed, 0 files unresolved |
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30 $ touch x y |
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31 $ hg ci -A -m 2 |
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32 adding x |
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33 adding y |
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34 created new head |
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35 |
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36 $ hg merge 1 |
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37 0 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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38 (branch merge, don't forget to commit) |
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39 $ hg ci -A -m m1 |
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40 |
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41 $ hg update -C 1 |
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42 0 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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43 $ hg merge 2 |
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44 0 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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45 (branch merge, don't forget to commit) |
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46 $ hg ci -A -m m2 |
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47 created new head |
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48 |
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49 $ cd .. |
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50 |
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51 $ hg clone -r 3 a b |
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52 adding changesets |
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53 adding manifests |
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54 adding file changes |
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55 added 4 changesets with 3 changes to 3 files |
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56 updating to branch default |
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57 3 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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58 |
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59 $ hg clone -r 4 a c |
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60 adding changesets |
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61 adding manifests |
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62 adding file changes |
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63 added 4 changesets with 3 changes to 3 files |
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64 updating to branch default |
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65 3 files updated, 0 files merged, 0 files removed, 0 files unresolved |
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66 |
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67 $ hg -R a outgoing b |
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68 comparing with b |
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69 searching for changes |
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70 changeset: 4:1ec3c74fc0e0 |
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71 tag: tip |
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72 parent: 1:79f9e10cd04e |
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73 parent: 2:8e1bb01c1a24 |
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74 user: test |
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75 date: Thu Jan 01 00:00:00 1970 +0000 |
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76 summary: m2 |
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77 |
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78 $ hg -R a outgoing c |
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79 comparing with c |
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80 searching for changes |
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81 changeset: 3:d15a0c284984 |
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82 parent: 2:8e1bb01c1a24 |
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83 parent: 1:79f9e10cd04e |
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84 user: test |
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85 date: Thu Jan 01 00:00:00 1970 +0000 |
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86 summary: m1 |
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87 |
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88 $ hg -R b outgoing c |
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89 comparing with c |
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90 searching for changes |
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91 changeset: 3:d15a0c284984 |
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92 tag: tip |
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93 parent: 2:8e1bb01c1a24 |
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94 parent: 1:79f9e10cd04e |
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95 user: test |
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96 date: Thu Jan 01 00:00:00 1970 +0000 |
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97 summary: m1 |
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98 |
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99 $ hg -R c outgoing b |
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100 comparing with b |
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101 searching for changes |
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102 changeset: 3:1ec3c74fc0e0 |
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103 tag: tip |
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104 parent: 1:79f9e10cd04e |
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105 parent: 2:8e1bb01c1a24 |
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106 user: test |
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107 date: Thu Jan 01 00:00:00 1970 +0000 |
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108 summary: m2 |
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109 |
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110 |
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111 $ hg -R b pull a |
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112 pulling from a |
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113 searching for changes |
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114 adding changesets |
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115 adding manifests |
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116 adding file changes |
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117 added 1 changesets with 0 changes to 0 files (+1 heads) |
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118 (run 'hg heads' to see heads, 'hg merge' to merge) |
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119 |
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120 $ hg -R c pull a |
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121 pulling from a |
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122 searching for changes |
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123 adding changesets |
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124 adding manifests |
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125 adding file changes |
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126 added 1 changesets with 0 changes to 0 files (+1 heads) |
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127 (run 'hg heads' to see heads, 'hg merge' to merge) |