upstream/mercurial-mirror Files · tests/test-custom-filters.t

largefiles: for update -C, only update largefiles when necessary...

largefiles: for update -C, only update largefiles when necessary Before, a --clean update with largefiles would use the "optimization" that it didn't read hashes from standin files before and after the update. Instead of trusting the content of the standin files, it would rehash all the actual largefiles that lfdirstate reported clean and update the standins that didn't have the expected content. It could thus in some "impossible" situations automatically recover from some "largefile got out sync with its standin" issues (even there apparently still were weird corner cases where it could fail). This extra checking is similar to what core --clean intentionally do not do, and it made update --clean unbearable slow. Usually in core Mercurial, --clean will rely on the dirstate to find the files it should update. (It is thus intentionally possible (when trying to trick the system or if there should be bugs) to end up in situations where --clean not will restore the working directory content correctly.) Checking every file when we "know" it is ok is however not an option - that would be too slow. Instead, trust the content of the standin files. Use the same logic for --clean as for linear updates and trust the dirstate and that our "logic" will keep them in sync. It is much cheaper to just rehash the largefiles reported dirty by a status walk and read all standins than to hash largefiles. Most of the changes are just a change of indentation now when the different kinds of updates no longer are handled that differently. Standins for added files are however only written when doing a normal update, while deleted and removed files only will be updated for --clean updates.

Matt Mackall - - Load All Authors

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        $ hg init

        $ cat > .hg/hgrc <<EOF

        > [extensions]

        > prefixfilter = prefix.py

        > [encode]

        > *.txt = stripprefix: Copyright 2046, The Masters

        > [decode]

        > *.txt = insertprefix: Copyright 2046, The Masters

        > EOF

        $ cat > prefix.py <<EOF

        > from mercurial import util

        > def stripprefix(s, cmd, filename, **kwargs):

        >     header = '%s\n' % cmd

        >     if s[:len(header)] != header:

        >         raise util.Abort('missing header "%s" in %s' % (cmd, filename))

        >     return s[len(header):]

        > def insertprefix(s, cmd):

        >     return '%s\n%s' % (cmd, s)

        > def reposetup(ui, repo):

        >     repo.adddatafilter('stripprefix:', stripprefix)

        >     repo.adddatafilter('insertprefix:', insertprefix)

        > EOF

        $ cat > .hgignore <<EOF

        > .hgignore

        > prefix.py

        > prefix.pyc

        > EOF

        $ cat > stuff.txt <<EOF

        > Copyright 2046, The Masters

        > Some stuff to ponder very carefully.

        > EOF

        $ hg add stuff.txt

        $ hg ci -m stuff

      Repository data:

        $ hg cat stuff.txt

        Some stuff to ponder very carefully.

      Fresh checkout:

        $ rm stuff.txt

        $ hg up -C

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        $ cat stuff.txt

        Copyright 2046, The Masters

        Some stuff to ponder very carefully.

        $ echo "Very very carefully." >> stuff.txt

        $ hg stat

        M stuff.txt

        $ echo "Unauthorized material subject to destruction." > morestuff.txt

      Problem encoding:

        $ hg add morestuff.txt

        $ hg ci -m morestuff

        abort: missing header "Copyright 2046, The Masters" in morestuff.txt

        [255]

        $ hg stat

        M stuff.txt

        A morestuff.txt

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				$ hg init

				$ cat > .hg/hgrc <<EOF
				> [extensions]
				> prefixfilter = prefix.py
				> [encode]
				> *.txt = stripprefix: Copyright 2046, The Masters
				> [decode]
				> *.txt = insertprefix: Copyright 2046, The Masters
				> EOF

				$ cat > prefix.py <<EOF
				> from mercurial import util
				> def stripprefix(s, cmd, filename, **kwargs):
				> header = '%s\n' % cmd
				> if s[:len(header)] != header:
				> raise util.Abort('missing header "%s" in %s' % (cmd, filename))
				> return s[len(header):]
				> def insertprefix(s, cmd):
				> return '%s\n%s' % (cmd, s)
				> def reposetup(ui, repo):
				> repo.adddatafilter('stripprefix:', stripprefix)
				> repo.adddatafilter('insertprefix:', insertprefix)
				> EOF

				$ cat > .hgignore <<EOF
				> .hgignore
				> prefix.py
				> prefix.pyc
				> EOF

				$ cat > stuff.txt <<EOF
				> Copyright 2046, The Masters
				> Some stuff to ponder very carefully.
				> EOF
				$ hg add stuff.txt
				$ hg ci -m stuff

				Repository data:

				$ hg cat stuff.txt
				Some stuff to ponder very carefully.

				Fresh checkout:

				$ rm stuff.txt
				$ hg up -C
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				$ cat stuff.txt
				Copyright 2046, The Masters
				Some stuff to ponder very carefully.
				$ echo "Very very carefully." >> stuff.txt
				$ hg stat
				M stuff.txt

				$ echo "Unauthorized material subject to destruction." > morestuff.txt

				Problem encoding:

				$ hg add morestuff.txt
				$ hg ci -m morestuff
				abort: missing header "Copyright 2046, The Masters" in morestuff.txt
				[255]
				$ hg stat
				M stuff.txt
				A morestuff.txt