tests/test-issue5979.t
author Pierre-Yves David <pierre-yves.david@octobus.net>
Thu, 07 Mar 2024 10:55:22 +0100
changeset 51531 f85f23f1479b
parent 40369 ef6cab7930b3
permissions -rw-r--r--
branchcache: skip entries that are topological heads in the on disk file In the majority of cases, topological heads are also branch heads. We have efficient way to get the topological heads and efficient way to retrieve their branch information. So there is little value in putting them in the branch cache file explicitly. On the contrary, writing them explicitly tend to create very large cache file that are inefficient to read and update. So the branch cache v3 format is no longer including them. This changeset focus on the format aspect and have no focus on the performance aspect. We will cover that later.
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  $ hg init r1
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  $ cd r1
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  $ hg ci --config ui.allowemptycommit=true -m c0
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  $ hg ci --config ui.allowemptycommit=true -m c1
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  $ hg ci --config ui.allowemptycommit=true -m c2
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  $ hg co -q 0
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  $ hg ci --config ui.allowemptycommit=true -m c3
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  created new head
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  $ hg co -q 3
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  $ hg merge --quiet
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  $ hg ci --config ui.allowemptycommit=true -m c4
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  $ hg log -G -T'{desc}'
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  @    c4
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  |\
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  | o  c3
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  | |
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  o |  c2
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  | |
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  o |  c1
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  |/
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  o  c0
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  >>> from mercurial import hg
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  >>> from mercurial import ui as uimod
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  >>> repo = hg.repository(uimod.ui())
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  >>> for anc in repo.changelog.ancestors([4], inclusive=True):
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  ...   print(anc)
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  4
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  3
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  2
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  1
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  0