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view tests/test-convert-mtn.t @ 32697:19b9fc40cc51
revlog: skeleton support for version 2 revlogs
There are a number of improvements we want to make to revlogs
that will require a new version - version 2. It is unclear what the
full set of improvements will be or when we'll be done with them.
What I do know is that the process will likely take longer than a
single release, will require input from various stakeholders to
evaluate changes, and will have many contentious debates and
bikeshedding.
It is unrealistic to develop revlog version 2 up front: there
are just too many uncertainties that we won't know until things
are implemented and experiments are run. Some changes will also
be invasive and prone to bit rot, so sitting on dozens of patches
is not practical.
This commit introduces skeleton support for version 2 revlogs in
a way that is flexible and not bound by backwards compatibility
concerns.
An experimental repo requirement for denoting revlog v2 has been
added. The requirement string has a sub-version component to it.
This will allow us to declare multiple requirements in the course
of developing revlog v2. Whenever we change the in-development
revlog v2 format, we can tweak the string, creating a new
requirement and locking out old clients. This will allow us to
make as many backwards incompatible changes and experiments to
revlog v2 as we want. In other words, we can land code and make
meaningful progress towards revlog v2 while still maintaining
extreme format flexibility up until the point we freeze the
format and remove the experimental labels.
To enable the new repo requirement, you must supply an experimental
and undocumented config option. But not just any boolean flag
will do: you need to explicitly use a value that no sane person
should ever type. This is an additional guard against enabling
revlog v2 on an installation it shouldn't be enabled on. The
specific scenario I'm trying to prevent is say a user with a
4.4 client with a frozen format enabling the option but then
downgrading to 4.3 and accidentally creating repos with an
outdated and unsupported repo format. Requiring a "challenge"
string should prevent this.
Because the format is not yet finalized and I don't want to take
any chances, revlog v2's version is currently 0xDEAD. I figure
squatting on a value we're likely never to use as an actual revlog
version to mean "internal testing only" is acceptable. And
"dead" is easily recognized as something meaningful.
There is a bunch of cleanup that is needed before work on revlog
v2 begins in earnest. I plan on doing that work once this patch
is accepted and we're comfortable with the idea of starting down
this path.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 19 May 2017 20:29:11 -0700 |
parents | d0210a35c81a |
children | 233fb0b91a35 |
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#require mtn Monotone directory is called .monotone on *nix and monotone on Windows. #if windows $ mtndir=monotone #else $ mtndir=.monotone #endif $ echo "[extensions]" >> $HGRCPATH $ echo "convert=" >> $HGRCPATH Windows version of monotone home $ APPDATA=$HOME; export APPDATA tedious monotone keys configuration The /dev/null redirection is necessary under Windows, or it complains about home directory permissions $ mtn --quiet genkey test@selenic.com 1>/dev/null 2>&1 <<EOF > passphrase > passphrase > EOF $ cat >> $HOME/$mtndir/monotonerc <<EOF > function get_passphrase(keypair_id) > return "passphrase" > end > EOF create monotone repository $ mtn db init --db=repo.mtn $ mtn --db=repo.mtn --branch=com.selenic.test setup workingdir $ cd workingdir $ echo a > a $ mkdir dir $ echo b > dir/b $ echo d > dir/d $ $PYTHON -c 'file("bin", "wb").write("a\\x00b")' $ echo c > c $ mtn add a dir/b dir/d c bin mtn: adding 'a' to workspace manifest mtn: adding 'bin' to workspace manifest mtn: adding 'c' to workspace manifest mtn: adding 'dir' to workspace manifest mtn: adding 'dir/b' to workspace manifest mtn: adding 'dir/d' to workspace manifest $ mtn ci -m initialize mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 0f6e5e4f2e7d2a8ef312408f57618abf026afd90 update monotone working directory $ mtn mv a dir/a mtn: skipping 'dir', already accounted for in workspace mtn: renaming 'a' to 'dir/a' in workspace manifest $ echo a >> dir/a $ echo b >> dir/b $ mtn drop c mtn: dropping 'c' from workspace manifest $ $PYTHON -c 'file("bin", "wb").write("b\\x00c")' $ mtn ci -m update1 mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 51d0a982464573a2a2cf5ee2c9219c652aaebeff $ cd .. convert once $ hg convert -s mtn repo.mtn assuming destination repo.mtn-hg initializing destination repo.mtn-hg repository scanning source... sorting... converting... 1 initialize 0 update1 $ cd workingdir $ echo e > e $ mtn add e mtn: adding 'e' to workspace manifest $ mtn drop dir/b mtn: dropping 'dir/b' from workspace manifest $ mtn mv bin bin2 mtn: renaming 'bin' to 'bin2' in workspace manifest $ mtn ci -m 'update2 "with" quotes' mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision ebe58335d85d8cb176b6d0a12be04f5314b998da test directory move $ mkdir -p dir1/subdir1 $ mkdir -p dir1/subdir2_other $ echo file1 > dir1/subdir1/file1 $ echo file2 > dir1/subdir2_other/file1 $ mtn add dir1/subdir1/file1 dir1/subdir2_other/file1 mtn: adding 'dir1' to workspace manifest mtn: adding 'dir1/subdir1' to workspace manifest mtn: adding 'dir1/subdir1/file1' to workspace manifest mtn: adding 'dir1/subdir2_other' to workspace manifest mtn: adding 'dir1/subdir2_other/file1' to workspace manifest $ mtn ci -m createdir1 mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision a8d62bc04fee4d2936d28e98bbcc81686dd74306 $ mtn rename dir1/subdir1 dir1/subdir2 mtn: skipping 'dir1', already accounted for in workspace mtn: renaming 'dir1/subdir1' to 'dir1/subdir2' in workspace manifest $ mtn ci -m movedir1 mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 2c3d241bbbfe538b1b51d910f5676407e3f4d3a6 test subdirectory move $ mtn mv dir dir2 mtn: renaming 'dir' to 'dir2' in workspace manifest $ echo newfile > dir2/newfile $ mtn drop dir2/d mtn: dropping 'dir2/d' from workspace manifest $ mtn add dir2/newfile mtn: adding 'dir2/newfile' to workspace manifest $ mtn ci -m movedir mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision fdb5a02dae8bfce3a79b3393680af471016e1b4c Test directory removal with empty directory $ mkdir dir2/dir $ mkdir dir2/dir/subdir $ echo f > dir2/dir/subdir/f $ mkdir dir2/dir/emptydir $ mtn add --quiet -R dir2/dir $ mtn ci -m emptydir mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 8bbf76d717001d24964e4604739fdcd0f539fc88 $ mtn drop -R dir2/dir mtn: dropping 'dir2/dir/subdir/f' from workspace manifest mtn: dropping 'dir2/dir/subdir' from workspace manifest mtn: dropping 'dir2/dir/emptydir' from workspace manifest mtn: dropping 'dir2/dir' from workspace manifest $ mtn ci -m dropdirectory mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 2323d4bc324e6c82628dc04d47a9fd32ad24e322 test directory and file move $ mkdir -p dir3/d1 $ echo a > dir3/a $ mtn add dir3/a dir3/d1 mtn: adding 'dir3' to workspace manifest mtn: adding 'dir3/a' to workspace manifest mtn: adding 'dir3/d1' to workspace manifest $ mtn ci -m dirfilemove mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 47b192f720faa622f48c68d1eb075b26d405aa8b $ mtn mv dir3/a dir3/d1/a mtn: skipping 'dir3/d1', already accounted for in workspace mtn: renaming 'dir3/a' to 'dir3/d1/a' in workspace manifest $ mtn mv dir3/d1 dir3/d2 mtn: skipping 'dir3', already accounted for in workspace mtn: renaming 'dir3/d1' to 'dir3/d2' in workspace manifest $ mtn ci -m dirfilemove2 mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 8b543a400d3ee7f6d4bb1835b9b9e3747c8cb632 test directory move into another directory move $ mkdir dir4 $ mkdir dir5 $ echo a > dir4/a $ mtn add dir4/a dir5 mtn: adding 'dir4' to workspace manifest mtn: adding 'dir4/a' to workspace manifest mtn: adding 'dir5' to workspace manifest $ mtn ci -m dirdirmove mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 466e0b2afc7a55aa2b4ab2f57cb240bb6cd66fc7 $ mtn mv dir5 dir6 mtn: renaming 'dir5' to 'dir6' in workspace manifest $ mtn mv dir4 dir6/dir4 mtn: skipping 'dir6', already accounted for in workspace mtn: renaming 'dir4' to 'dir6/dir4' in workspace manifest $ mtn ci -m dirdirmove2 mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 3d1f77ebad0c23a5d14911be3b670f990991b749 test diverging directory moves $ mkdir -p dir7/dir9/dir8 $ echo a > dir7/dir9/dir8/a $ echo b > dir7/dir9/b $ echo c > dir7/c $ mtn add -R dir7 mtn: adding 'dir7' to workspace manifest mtn: adding 'dir7/c' to workspace manifest mtn: adding 'dir7/dir9' to workspace manifest mtn: adding 'dir7/dir9/b' to workspace manifest mtn: adding 'dir7/dir9/dir8' to workspace manifest mtn: adding 'dir7/dir9/dir8/a' to workspace manifest $ mtn ci -m divergentdirmove mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 08a08511f18b428d840199b062de90d0396bc2ed $ mtn mv dir7 dir7-2 mtn: renaming 'dir7' to 'dir7-2' in workspace manifest $ mtn mv dir7-2/dir9 dir9-2 mtn: renaming 'dir7-2/dir9' to 'dir9-2' in workspace manifest $ mtn mv dir9-2/dir8 dir8-2 mtn: renaming 'dir9-2/dir8' to 'dir8-2' in workspace manifest $ mtn ci -m divergentdirmove2 mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision 4a736634505795f17786fffdf2c9cbf5b11df6f6 test large file support (> 32kB) >>> fp = file('large-file', 'wb') >>> for x in xrange(10000): fp.write('%d\n' % x) >>> fp.close() $ md5sum.py large-file 5d6de8a95c3b6bf9e0ffb808ba5299c1 large-file $ mtn add large-file mtn: adding 'large-file' to workspace manifest $ mtn ci -m largefile mtn: beginning commit on branch 'com.selenic.test' mtn: committed revision f0a20fecd10dc4392d18fe69a03f1f4919d3387b test suspending (closing a branch) $ mtn suspend f0a20fecd10dc4392d18fe69a03f1f4919d3387b 2> /dev/null $ cd .. convert incrementally $ hg convert -s mtn repo.mtn assuming destination repo.mtn-hg scanning source... sorting... converting... 12 update2 "with" quotes 11 createdir1 10 movedir1 9 movedir 8 emptydir 7 dropdirectory 6 dirfilemove 5 dirfilemove2 4 dirdirmove 3 dirdirmove2 2 divergentdirmove 1 divergentdirmove2 0 largefile $ glog() > { > hg log -G --template '{rev} "{desc|firstline}" files: {files}\n' "$@" > } $ cd repo.mtn-hg $ hg up -C 12 files updated, 0 files merged, 0 files removed, 0 files unresolved no open descendant heads on branch "com.selenic.test", updating to a closed head (committing will reopen branch "com.selenic.test") $ glog @ 14 "largefile" files: large-file | o 13 "divergentdirmove2" files: dir7-2/c dir7/c dir7/dir9/b dir7/dir9/dir8/a dir8-2/a dir9-2/b | o 12 "divergentdirmove" files: dir7/c dir7/dir9/b dir7/dir9/dir8/a | o 11 "dirdirmove2" files: dir4/a dir6/dir4/a | o 10 "dirdirmove" files: dir4/a | o 9 "dirfilemove2" files: dir3/a dir3/d2/a | o 8 "dirfilemove" files: dir3/a | o 7 "dropdirectory" files: dir2/dir/subdir/f | o 6 "emptydir" files: dir2/dir/subdir/f | o 5 "movedir" files: dir/a dir/d dir2/a dir2/newfile | o 4 "movedir1" files: dir1/subdir1/file1 dir1/subdir2/file1 | o 3 "createdir1" files: dir1/subdir1/file1 dir1/subdir2_other/file1 | o 2 "update2 "with" quotes" files: bin bin2 dir/b e | o 1 "update1" files: a bin c dir/a dir/b | o 0 "initialize" files: a bin c dir/b dir/d manifest $ hg manifest bin2 dir1/subdir2/file1 dir1/subdir2_other/file1 dir2/a dir2/newfile dir3/d2/a dir6/dir4/a dir7-2/c dir8-2/a dir9-2/b e large-file contents $ cat dir2/a a a $ test -d dir2/dir && echo 'removed dir2/dir is still there!' [1] file move $ hg log -v -C -r 1 | grep copies copies: dir/a (a) check directory move $ hg manifest -r 4 bin2 dir/a dir/d dir1/subdir2/file1 dir1/subdir2_other/file1 e $ test -d dir1/subdir2 || echo 'new dir1/subdir2 does not exist!' $ test -d dir1/subdir1 && echo 'renamed dir1/subdir1 is still there!' [1] $ hg log -v -C -r 4 | grep copies copies: dir1/subdir2/file1 (dir1/subdir1/file1) check file remove with directory move $ hg manifest -r 5 bin2 dir1/subdir2/file1 dir1/subdir2_other/file1 dir2/a dir2/newfile e check file move with directory move $ hg manifest -r 9 bin2 dir1/subdir2/file1 dir1/subdir2_other/file1 dir2/a dir2/newfile dir3/d2/a e check file directory directory move $ hg manifest -r 11 bin2 dir1/subdir2/file1 dir1/subdir2_other/file1 dir2/a dir2/newfile dir3/d2/a dir6/dir4/a e check divergent directory moves $ hg manifest -r 13 bin2 dir1/subdir2/file1 dir1/subdir2_other/file1 dir2/a dir2/newfile dir3/d2/a dir6/dir4/a dir7-2/c dir8-2/a dir9-2/b e test large file support (> 32kB) $ md5sum.py large-file 5d6de8a95c3b6bf9e0ffb808ba5299c1 large-file check branch closing $ hg branches -a $ hg branches -c com.selenic.test 14:* (closed) (glob)