tests/test-remotefilelog-sparse.t
author Manuel Jacob <me@manueljacob.de>
Mon, 11 Jul 2022 01:51:20 +0200
branchstable
changeset 49378 094a5fa3cf52
parent 46874 84a93fa7ecfd
child 51181 dcaa2df1f688
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.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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#require no-windows
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  $ . "$TESTDIR/remotefilelog-library.sh"
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  $ hg init master
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  $ cd master
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  $ cat >> .hg/hgrc <<EOF
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  > [remotefilelog]
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  > server=True
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  > EOF
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  $ echo x > x
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  $ echo z > z
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  $ hg commit -qAm x1
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  $ echo x2 > x
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  $ echo z2 > z
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  $ hg commit -qAm x2
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  $ hg bookmark foo
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  $ cd ..
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# prefetch a revision w/ a sparse checkout
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  $ hgcloneshallow ssh://user@dummy/master shallow --noupdate
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  streaming all changes
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  2 files to transfer, 527 bytes of data (no-zstd !)
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  transferred 527 bytes in * seconds (* */sec) (glob) (no-zstd !)
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  2 files to transfer, 534 bytes of data (zstd !)
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  transferred 534 bytes in * seconds (* */sec) (glob) (zstd !)
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  searching for changes
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  no changes found
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  $ cd shallow
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  $ printf "[extensions]\nsparse=\n" >> .hg/hgrc
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  $ hg debugsparse -I x
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  $ hg prefetch -r 0
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  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
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  $ hg cat -r 0 x
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  x
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  $ hg debugsparse -I z
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  $ hg prefetch -r 0
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  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
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  $ hg cat -r 0 z
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  z
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# prefetch sparse only on pull when configured
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  $ printf "[remotefilelog]\npullprefetch=bookmark()\n" >> .hg/hgrc
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  $ hg strip tip
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  saved backup bundle to $TESTTMP/shallow/.hg/strip-backup/876b1317060d-b2e91d8d-backup.hg (glob)
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  2 files fetched over 2 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
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  $ hg debugsparse --delete z
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  $ clearcache
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  $ hg pull
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  pulling from ssh://user@dummy/master
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  searching for changes
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  adding changesets
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  adding manifests
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  adding file changes
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  updating bookmark foo
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  added 1 changesets with 0 changes to 0 files
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  new changesets 876b1317060d
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  (run 'hg update' to get a working copy)
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  prefetching file contents
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  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
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# Dont consider filtered files when doing copy tracing
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## Push an unrelated commit
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  $ cd ../
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  $ hgcloneshallow ssh://user@dummy/master shallow2
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  streaming all changes
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  2 files to transfer, 527 bytes of data (no-zstd !)
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  transferred 527 bytes in * seconds (*) (glob) (no-zstd !)
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  2 files to transfer, 534 bytes of data (zstd !)
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  transferred 534 bytes in * seconds (* */sec) (glob) (zstd !)
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  searching for changes
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  no changes found
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  updating to branch default
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  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  1 files fetched over 1 fetches - (1 misses, 0.00% hit ratio) over *s (glob)
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  $ cd shallow2
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  $ printf "[extensions]\nsparse=\n" >> .hg/hgrc
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  $ hg up -q 0
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  2 files fetched over 1 fetches - (2 misses, 0.00% hit ratio) over *s (glob)
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  $ touch a
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  $ hg ci -Aqm a
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  $ hg push -q -f
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## Pull the unrelated commit and rebase onto it - verify unrelated file was not
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pulled
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  $ cd ../shallow
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  $ hg up -q 1
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  $ hg pull -q
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  $ hg debugsparse -I z
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  $ clearcache
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  $ hg prefetch -r '. + .^' -I x -I z
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  4 files fetched over 1 fetches - (4 misses, 0.00% hit ratio) over * (glob)
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  $ hg rebase -d 2 --keep
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  rebasing 1:876b1317060d foo "x2"