dirstate-v2: Add `hg debugupgraderepo` command support
This command changes changes the file formats used inside an existing
repository to what they would be in a new repository with the current config.
For example:
hg debugupgraderepo --config format.exp-dirstate-v2=1 --run
hg debugupgraderepo --config format.exp-dirstate-v2=0 --run
If a repository has a dirstate in v1 format, the first command would upgrade it
to dirstate-v2. Conversely, if a repository has a dirstate in v2 format, the
second command would downgrade it to v1. (Both may also run some unrelated
upgrades.)
Since `format.exp-dirstate-v2` is currently disabled by default, not specifying
it in `--config` or any configuration file would result in the second command.
Differential Revision: https://phab.mercurial-scm.org/D10769
==========================================================
Test file dedicated to checking side-data related behavior
==========================================================
Check data can be written/read from sidedata
============================================
$ cat << EOF >> $HGRCPATH
> [extensions]
> testsidedata=$TESTDIR/testlib/ext-sidedata.py
> EOF
$ hg init test-sidedata --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data
$ cd test-sidedata
$ echo aaa > a
$ hg add a
$ hg commit -m a --traceback
$ echo aaa > b
$ hg add b
$ hg commit -m b
$ echo xxx >> a
$ hg commit -m aa
$ hg debugsidedata -c 0
2 sidedata entries
entry-0001 size 4
entry-0002 size 32
$ hg debugsidedata -c 1 -v
2 sidedata entries
entry-0001 size 4
'\x00\x00\x006'
entry-0002 size 32
'\x98\t\xf9\xc4v\xf0\xc5P\x90\xf7wRf\xe8\xe27e\xfc\xc1\x93\xa4\x96\xd0\x1d\x97\xaaG\x1d\xd7t\xfa\xde'
$ hg debugsidedata -m 2
2 sidedata entries
entry-0001 size 4
entry-0002 size 32
$ hg debugsidedata a 1
2 sidedata entries
entry-0001 size 4
entry-0002 size 32
Check upgrade behavior
======================
Right now, sidedata has not upgrade support
Check that we can upgrade to sidedata
-------------------------------------
$ hg init up-no-side-data --config experimental.revlogv2=no
$ hg debugformat -v -R up-no-side-data
format-variant repo config default
fncache: yes yes yes
dirstate-v2: no no no
dotencode: yes yes yes
generaldelta: yes yes yes
share-safe: no no no
sparserevlog: yes yes yes
persistent-nodemap: no no no (no-rust !)
persistent-nodemap: yes yes no (rust !)
copies-sdc: no no no
revlog-v2: no no no
changelog-v2: no no no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib (no-zstd !)
compression: zstd zstd zstd (zstd !)
compression-level: default default default
$ hg debugformat -v -R up-no-side-data --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data
format-variant repo config default
fncache: yes yes yes
dirstate-v2: no no no
dotencode: yes yes yes
generaldelta: yes yes yes
share-safe: no no no
sparserevlog: yes yes yes
persistent-nodemap: no no no (no-rust !)
persistent-nodemap: yes yes no (rust !)
copies-sdc: no no no
revlog-v2: no yes no
changelog-v2: no no no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib (no-zstd !)
compression: zstd zstd zstd (zstd !)
compression-level: default default default
$ hg debugupgraderepo -R up-no-side-data --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data > /dev/null
Check that we can downgrade from sidedata
-----------------------------------------
$ hg init up-side-data --config experimental.revlogv2=enable-unstable-format-and-corrupt-my-data
$ hg debugformat -v -R up-side-data
format-variant repo config default
fncache: yes yes yes
dirstate-v2: no no no
dotencode: yes yes yes
generaldelta: yes yes yes
share-safe: no no no
sparserevlog: yes yes yes
persistent-nodemap: no no no (no-rust !)
persistent-nodemap: yes yes no (rust !)
copies-sdc: no no no
revlog-v2: yes no no
changelog-v2: no no no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib (no-zstd !)
compression: zstd zstd zstd (zstd !)
compression-level: default default default
$ hg debugformat -v -R up-side-data --config experimental.revlogv2=no
format-variant repo config default
fncache: yes yes yes
dirstate-v2: no no no
dotencode: yes yes yes
generaldelta: yes yes yes
share-safe: no no no
sparserevlog: yes yes yes
persistent-nodemap: no no no (no-rust !)
persistent-nodemap: yes yes no (rust !)
copies-sdc: no no no
revlog-v2: yes no no
changelog-v2: no no no
plain-cl-delta: yes yes yes
compression: zlib zlib zlib (no-zstd !)
compression: zstd zstd zstd (zstd !)
compression-level: default default default
$ hg debugupgraderepo -R up-side-data --config experimental.revlogv2=no > /dev/null