upstream/mercurial-mirror Files · tests/test-largefiles-small-disk.t

verify: check the subrepository references in .hgsubstate...

verify: check the subrepository references in .hgsubstate While hopefully atypical, there are reasons that a subrepository revision can be lost that aren't covered by corruption of the .hgsubstate revlog. Such things can happen when a subrepo is amended, stripped or simply isn't pulled from upstream because the parent repo revision wasn't updated yet. There's no way to know if it is an error, but this will find potential problems sooner than when some random revision is updated. Until recently, convert made no attempt at rewriting the .hgsubstate file. The impetuous for this is to verify the conversion of some repositories, and this is orders of magnitude faster than a bash script from 0..tip that does an 'hg update -C $rev'. But it is equally useful to determine if everything has been pulled down before taking a thumb drive on the go. It feels somewhat wrong to leave this out of verifymod (mostly because the file is already read in there, and the final summary is printed before the subrepos are checked). But verifymod looks very low level, so importing subrepo stuff there seems more wrong.

Mads Kiilerich - - Load All Authors

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      Test how largefiles abort in case the disk runs full

        $ cat > criple.py <<EOF

        > import os, errno, shutil

        > from mercurial import util

        > #

        > # this makes the original largefiles code abort:

        > def copyfileobj(fsrc, fdst, length=16*1024):

        >     fdst.write(fsrc.read(4))

        >     raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC))

        > shutil.copyfileobj = copyfileobj

        > #

        > # this makes the rewritten code abort:

        > def filechunkiter(f, size=65536, limit=None):

        >     yield f.read(4)

        >     raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC))

        > util.filechunkiter = filechunkiter

        > #

        > def oslink(src, dest):

        >     raise OSError("no hardlinks, try copying instead")

        > util.oslink = oslink

        > EOF

        $ echo "[extensions]" >> $HGRCPATH

        $ echo "largefiles =" >> $HGRCPATH

        $ hg init alice

        $ cd alice

        $ echo "this is a very big file" > big

        $ hg add --large big

        $ hg commit --config extensions.criple=$TESTTMP/criple.py -m big

        abort: No space left on device

        [255]

      The largefile is not created in .hg/largefiles:

        $ ls .hg/largefiles

        dirstate

      The user cache is not even created:

        >>> import os; os.path.exists("$HOME/.cache/largefiles/")

        False

      Make the commit with space on the device:

        $ hg commit -m big

      Now make a clone with a full disk, and make sure lfutil.link function

      makes copies instead of hardlinks:

        $ cd ..

        $ hg --config extensions.criple=$TESTTMP/criple.py clone --pull alice bob

        requesting all changes

        adding changesets

        adding manifests

        adding file changes

        added 1 changesets with 1 changes to 1 files

        updating to branch default

        getting changed largefiles

        abort: No space left on device

        [255]

      The largefile is not created in .hg/largefiles:

        $ ls bob/.hg/largefiles

        dirstate

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				Test how largefiles abort in case the disk runs full

				$ cat > criple.py <<EOF
				> import os, errno, shutil
				> from mercurial import util
				> #
				> # this makes the original largefiles code abort:
				> def copyfileobj(fsrc, fdst, length=16*1024):
				> fdst.write(fsrc.read(4))
				> raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC))
				> shutil.copyfileobj = copyfileobj
				> #
				> # this makes the rewritten code abort:
				> def filechunkiter(f, size=65536, limit=None):
				> yield f.read(4)
				> raise IOError(errno.ENOSPC, os.strerror(errno.ENOSPC))
				> util.filechunkiter = filechunkiter
				> #
				> def oslink(src, dest):
				> raise OSError("no hardlinks, try copying instead")
				> util.oslink = oslink
				> EOF

				$ echo "[extensions]" >> $HGRCPATH
				$ echo "largefiles =" >> $HGRCPATH

				$ hg init alice
				$ cd alice
				$ echo "this is a very big file" > big
				$ hg add --large big
				$ hg commit --config extensions.criple=$TESTTMP/criple.py -m big
				abort: No space left on device
				[255]

				The largefile is not created in .hg/largefiles:

				$ ls .hg/largefiles
				dirstate

				The user cache is not even created:

				>>> import os; os.path.exists("$HOME/.cache/largefiles/")
				False

				Make the commit with space on the device:

				$ hg commit -m big

				Now make a clone with a full disk, and make sure lfutil.link function
				makes copies instead of hardlinks:

				$ cd ..
				$ hg --config extensions.criple=$TESTTMP/criple.py clone --pull alice bob
				requesting all changes
				adding changesets
				adding manifests
				adding file changes
				added 1 changesets with 1 changes to 1 files
				updating to branch default
				getting changed largefiles
				abort: No space left on device
				[255]

				The largefile is not created in .hg/largefiles:

				$ ls bob/.hg/largefiles
				dirstate