tests/test-rename-rev.t
author Manuel Jacob <me@manueljacob.de>
Mon, 11 Jul 2022 01:51:20 +0200
branchstable
changeset 49378 094a5fa3cf52
parent 48247 c62e4397eb28
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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  $ hg init
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  $ mkdir d1 d1/d11 d2
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  $ echo d1/a > d1/a
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  $ echo d1/ba > d1/ba
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  $ echo d1/a1 > d1/d11/a1
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  $ echo d1/b > d1/b
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  $ echo d2/b > d2/b
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  $ hg add d1/a d1/b d1/ba d1/d11/a1 d2/b
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  $ hg commit -m "intial"
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Test single file
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# One recorded copy, one copy to record after commit
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  $ hg cp d1/b d1/c
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  $ cp d1/b d1/d
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  $ hg add d1/d
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  $ hg ci -m 'copy d1/b to d1/c and d1/d'
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  $ hg st -C --change .
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  A d1/c
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    d1/b
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  A d1/d
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# Errors out without --after for now
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  $ hg cp --at-rev . d1/b d1/d
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  abort: --at-rev requires --after
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  [10]
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# Errors out with non-existent source
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  $ hg cp -A --at-rev . d1/non-existent d1/d
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  d1/non-existent: no such file in rev 55d1fd85ef0a
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  abort: no files to copy
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  [10]
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# Errors out with non-existent destination
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  $ hg cp -A --at-rev . d1/b d1/non-existent
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  abort: d1/non-existent: copy destination does not exist in 8a9d70fa20c9
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  [10]
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# Successful invocation
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  $ hg cp -A --at-rev . d1/b d1/d
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  saved backup bundle to $TESTTMP/.hg/strip-backup/8a9d70fa20c9-973ae357-copy.hg
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# New copy is recorded, and previously recorded copy is also still there
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  $ hg st -C --change .
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  A d1/c
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    d1/b
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  A d1/d
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    d1/b
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# Should get helpful message if we try to copy or rename after commit
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  $ hg cp --forget --at-rev . d1/d
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  saved backup bundle to $TESTTMP/.hg/strip-backup/3f7c325d3f9e-46f377bb-uncopy.hg
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  $ hg cp d1/b d1/d
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  d1/d: not overwriting - file already committed
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  ('hg copy --at-rev .' to record the copy in the parent of the working copy)
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  $ hg mv d1/b d1/d
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  d1/d: not overwriting - file already committed
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  ('hg rename --at-rev .' to record the rename in the parent of the working copy)
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Test moved file (not copied) using 'hg cp' command
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  $ hg co 0
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  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
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  $ mv d1/b d1/d
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  $ hg rm -A d1/b
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  $ hg add d1/d
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  $ hg ci -m 'move d1/b to d1/d'
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  created new head
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  $ hg cp -A --at-rev . d1/b d1/d
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  saved backup bundle to $TESTTMP/.hg/strip-backup/519850c3ea27-153c8fbb-copy.hg
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  $ hg st -C --change .
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  A d1/d
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    d1/b
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  R d1/b
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Test moved file (not copied) using 'hg mv' command
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  $ hg co 0
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  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  $ mv d1/b d1/d
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  $ hg rm -A d1/b
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  $ hg add d1/d
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  $ hg ci -m 'move d1/b to d1/d'
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  created new head
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  $ hg mv -A --at-rev . d1/b d1/d
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  saved backup bundle to $TESTTMP/.hg/strip-backup/519850c3ea27-153c8fbb-copy.hg
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  $ hg st -C --change .
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  A d1/d
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    d1/b
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  R d1/b
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Test moved file (not copied) for which source still exists
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  $ hg co 0
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  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  $ cp d1/b d1/d
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  $ hg add d1/d
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  $ hg ci -m 'copy d1/b to d1/d'
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  created new head
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  $ hg mv -A --at-rev . d1/b d1/d
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  saved backup bundle to $TESTTMP/.hg/strip-backup/c8d0f6bcf7ca-1c9bb53e-copy.hg
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  $ hg st -C --change .
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  A d1/d
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    d1/b
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Test using directory as destination
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  $ hg co 0
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  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  $ cp -R d1 d3
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  $ hg add d3
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  adding d3/a
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  adding d3/b
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  adding d3/ba
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  adding d3/d11/a1
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  $ hg ci -m 'copy d1/ to d3/'
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  created new head
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  $ hg cp -A --at-rev . d1 d3
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  abort: d3: --at-rev does not support a directory as destination
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  [10]
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