tests/test-branch-option.t
author Manuel Jacob <me@manueljacob.de>
Mon, 11 Jul 2022 01:51:20 +0200
branchstable
changeset 49378 094a5fa3cf52
parent 48368 8c4881c07f57
permissions -rw-r--r--
procutil: make stream detection in make_line_buffered more correct and strict In make_line_buffered(), we don’t want to wrap the stream if we know that lines get flushed to the underlying raw stream already. Previously, the heuristic was too optimistic. It assumed that any stream which is not an instance of io.BufferedIOBase doesn’t need wrapping. However, there are buffered streams that aren’t instances of io.BufferedIOBase, like Mercurial’s own winstdout. The new logic is different in two ways: First, only for the check, if unwraps any combination of WriteAllWrapper and winstdout. Second, it skips wrapping the stream only if it is an instance of io.RawIOBase (or already wrapped). If it is an instance of io.BufferedIOBase, it gets wrapped. In any other case, the function raises an exception. This ensures that, if an unknown stream is passed or we add another wrapper in the future, we don’t wrap the stream if it’s already line buffered or not wrap the stream if it’s not line buffered. In fact, this was already helpful during development of this change. Without it, I possibly would have forgot that WriteAllWrapper needs to be ignored for the check, leading to unnecessary wrapping if stdout is unbuffered. The alternative would have been to always wrap unknown streams. However, I don’t think that anyone would benefit from being less strict. We can expect streams from the standard library to be subclassing either io.RawIOBase or io.BufferedIOBase, so running Mercurial in the standard way should not regress by this change. Py2exe might replace sys.stdout and sys.stderr, but that currently breaks Mercurial anyway and also these streams don’t claim to be interactive, so this function is not called for them.
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test branch selection options
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  $ hg init branch
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  $ cd branch
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  $ hg branch a
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  marked working directory as branch a
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  (branches are permanent and global, did you want a bookmark?)
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  $ echo a > foo
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  $ hg ci -d '0 0' -Ama
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  adding foo
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  $ echo a2 > foo
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  $ hg ci -d '0 0' -ma2
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  $ hg up 0
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg branch c
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  marked working directory as branch c
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  $ echo c > foo
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  $ hg ci -d '0 0' -mc
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  $ hg tag -l z
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  $ cd ..
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  $ hg clone -r 0 branch branch2
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  adding changesets
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  adding manifests
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  adding file changes
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  added 1 changesets with 1 changes to 1 files
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  new changesets 5b65ba7c951d
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  updating to branch a
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ cd branch2
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  $ hg up 0
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  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg branch b
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  marked working directory as branch b
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  $ echo b > foo
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  $ hg ci -d '0 0' -mb
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  $ hg up 0
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg --encoding utf-8 branch æ
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  marked working directory as branch \xc3\xa6 (esc)
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  $ echo ae1 > foo
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  $ hg ci -d '0 0' -mae1
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  $ hg up 0
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg --encoding utf-8 branch -f æ
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  marked working directory as branch \xc3\xa6 (esc)
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  $ echo ae2 > foo
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  $ hg ci -d '0 0' -mae2
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  created new head
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  $ hg up 0
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg branch -f b
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  marked working directory as branch b
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  $ echo b2 > foo
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  $ hg ci -d '0 0' -mb2
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  created new head
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unknown branch and fallback
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  $ hg in -qbz
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  abort: unknown branch 'z'
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  [10]
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  $ hg in -q ../branch#z
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  2:f25d57ab0566
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  $ hg out -qbz
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  abort: unknown branch 'z'
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  [10]
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in rev c branch a
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  $ hg in -qr c ../branch#a
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  1:dd6e60a716c6
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  2:f25d57ab0566
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  $ hg in -qr c -b a
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  1:dd6e60a716c6
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  2:f25d57ab0566
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out branch .
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  $ hg out -q ../branch#.
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  1:b84708d77ab7
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  4:65511d0e2b55
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  $ hg out -q -b .
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out branch . non-ascii
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  $ hg --encoding utf-8 up æ
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg --encoding latin1 out -q ../branch#.
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  $ hg --encoding latin1 out -q -b .
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clone branch b
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  $ cd ..
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  $ hg clone branch2#b branch3
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  adding changesets
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  adding manifests
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  adding file changes
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  added 3 changesets with 3 changes to 1 files (+1 heads)
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  new changesets 5b65ba7c951d:65511d0e2b55
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  updating to branch b
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  $ hg -q -R branch3 heads b
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  2:65511d0e2b55
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  1:b84708d77ab7
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  $ hg -q -R branch3 parents
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  2:65511d0e2b55
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  $ rm -rf branch3
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clone rev a branch b
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  $ hg clone -r a branch2#b branch3
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  adding changesets
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  adding manifests
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  adding file changes
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  added 3 changesets with 3 changes to 1 files (+1 heads)
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  new changesets 5b65ba7c951d:65511d0e2b55
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  updating to branch a
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
36a5e7cb6c8d tests: unify test-branch-option
Martin Geisler <mg@lazybytes.net>
parents: 11322
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   125
  $ hg -q -R branch3 heads b
36a5e7cb6c8d tests: unify test-branch-option
Martin Geisler <mg@lazybytes.net>
parents: 11322
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   126
  2:65511d0e2b55
36a5e7cb6c8d tests: unify test-branch-option
Martin Geisler <mg@lazybytes.net>
parents: 11322
diff changeset
   127
  1:b84708d77ab7
36a5e7cb6c8d tests: unify test-branch-option
Martin Geisler <mg@lazybytes.net>
parents: 11322
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   128
  $ hg -q -R branch3 parents
36a5e7cb6c8d tests: unify test-branch-option
Martin Geisler <mg@lazybytes.net>
parents: 11322
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   129
  0:5b65ba7c951d
36a5e7cb6c8d tests: unify test-branch-option
Martin Geisler <mg@lazybytes.net>
parents: 11322
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   130
  $ rm -rf branch3