sharesafe: introduce config to disallow outdated shares if upgrade fails
After this patch, we have config option to control all aspects of shares
when share source is upgraded or downgraded.
Differential Revision: https://phab.mercurial-scm.org/D9692
setup
$ cat >> $HGRCPATH <<EOF
> [extensions]
> share =
> [format]
> exp-share-safe = True
> EOF
prepare source repo
$ hg init source
$ cd source
$ cat .hg/requires
exp-sharesafe
$ cat .hg/store/requires
dotencode
fncache
generaldelta
revlogv1
sparserevlog
store
$ hg debugrequirements
dotencode
exp-sharesafe
fncache
generaldelta
revlogv1
sparserevlog
store
$ echo a > a
$ hg ci -Aqm "added a"
$ echo b > b
$ hg ci -Aqm "added b"
$ HGEDITOR=cat hg config --shared
abort: repository is not shared; can't use --shared
[10]
$ cd ..
Create a shared repo and check the requirements are shared and read correctly
$ hg share source shared1
updating working directory
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd shared1
$ cat .hg/requires
exp-sharesafe
shared
$ hg debugrequirements -R ../source
dotencode
exp-sharesafe
fncache
generaldelta
revlogv1
sparserevlog
store
$ hg debugrequirements
dotencode
exp-sharesafe
fncache
generaldelta
revlogv1
shared
sparserevlog
store
$ echo c > c
$ hg ci -Aqm "added c"
Check that config of the source repository is also loaded
$ hg showconfig ui.curses
[1]
$ echo "[ui]" >> ../source/.hg/hgrc
$ echo "curses=true" >> ../source/.hg/hgrc
$ hg showconfig ui.curses
true
Test that extensions of source repository are also loaded
$ hg debugextensions
share
$ hg extdiff -p echo
hg: unknown command 'extdiff'
'extdiff' is provided by the following extension:
extdiff command to allow external programs to compare revisions
(use 'hg help extensions' for information on enabling extensions)
[255]
$ echo "[extensions]" >> ../source/.hg/hgrc
$ echo "extdiff=" >> ../source/.hg/hgrc
$ hg debugextensions -R ../source
extdiff
share
$ hg extdiff -R ../source -p echo
BROKEN: the command below will not work if config of shared source is not loaded
on dispatch but debugextensions says that extension
is loaded
$ hg debugextensions
extdiff
share
$ hg extdiff -p echo
However, local .hg/hgrc should override the config set by share source
$ echo "[ui]" >> .hg/hgrc
$ echo "curses=false" >> .hg/hgrc
$ hg showconfig ui.curses
false
$ HGEDITOR=cat hg config --shared
[ui]
curses=true
[extensions]
extdiff=
$ HGEDITOR=cat hg config --local
[ui]
curses=false
Testing that hooks set in source repository also runs in shared repo
$ cd ../source
$ cat <<EOF >> .hg/hgrc
> [extensions]
> hooklib=
> [hooks]
> pretxnchangegroup.reject_merge_commits = \
> python:hgext.hooklib.reject_merge_commits.hook
> EOF
$ cd ..
$ hg clone source cloned
updating to branch default
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd cloned
$ hg up 0
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ echo bar > bar
$ hg ci -Aqm "added bar"
$ hg merge
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m "merge commit"
$ hg push ../source
pushing to ../source
searching for changes
adding changesets
adding manifests
adding file changes
error: pretxnchangegroup.reject_merge_commits hook failed: bcde3522682d rejected as merge on the same branch. Please consider rebase.
transaction abort!
rollback completed
abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
[255]
$ hg push ../shared1
pushing to ../shared1
searching for changes
adding changesets
adding manifests
adding file changes
error: pretxnchangegroup.reject_merge_commits hook failed: bcde3522682d rejected as merge on the same branch. Please consider rebase.
transaction abort!
rollback completed
abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
[255]
Test that if share source config is untrusted, we dont read it
$ cd ../shared1
$ cat << EOF > $TESTTMP/untrusted.py
> from mercurial import scmutil, util
> def uisetup(ui):
> class untrustedui(ui.__class__):
> def _trusted(self, fp, f):
> if util.normpath(fp.name).endswith(b'source/.hg/hgrc'):
> return False
> return super(untrustedui, self)._trusted(fp, f)
> ui.__class__ = untrustedui
> EOF
$ hg showconfig hooks
hooks.pretxnchangegroup.reject_merge_commits=python:hgext.hooklib.reject_merge_commits.hook
$ hg showconfig hooks --config extensions.untrusted=$TESTTMP/untrusted.py
[1]
Update the source repository format and check that shared repo works
$ cd ../source
Disable zstd related tests because its not present on pure version
#if zstd
$ echo "[format]" >> .hg/hgrc
$ echo "revlog-compression=zstd" >> .hg/hgrc
$ hg debugupgraderepo --run -q
upgrade will perform the following actions:
requirements
preserved: dotencode, exp-sharesafe, fncache, generaldelta, revlogv1, sparserevlog, store
added: revlog-compression-zstd
processed revlogs:
- all-filelogs
- changelog
- manifest
$ hg log -r .
changeset: 1:5f6d8a4bf34a
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: added b
#endif
$ echo "[format]" >> .hg/hgrc
$ echo "use-persistent-nodemap=True" >> .hg/hgrc
$ hg debugupgraderepo --run -q -R ../shared1
abort: cannot upgrade repository; unsupported source requirement: shared
[255]
$ hg debugupgraderepo --run -q
upgrade will perform the following actions:
requirements
preserved: dotencode, exp-sharesafe, fncache, generaldelta, revlogv1, sparserevlog, store (no-zstd !)
preserved: dotencode, exp-sharesafe, fncache, generaldelta, revlog-compression-zstd, revlogv1, sparserevlog, store (zstd !)
added: persistent-nodemap
processed revlogs:
- all-filelogs
- changelog
- manifest
$ hg log -r .
changeset: 1:5f6d8a4bf34a
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: added b
Shared one should work
$ cd ../shared1
$ hg log -r .
changeset: 2:155349b645be
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: added c
Testing that nonsharedrc is loaded for source and not shared
$ cd ../source
$ touch .hg/hgrc-not-shared
$ echo "[ui]" >> .hg/hgrc-not-shared
$ echo "traceback=true" >> .hg/hgrc-not-shared
$ hg showconfig ui.traceback
true
$ HGEDITOR=cat hg config --non-shared
[ui]
traceback=true
$ cd ../shared1
$ hg showconfig ui.traceback
[1]
Unsharing works
$ hg unshare
Test that source config is added to the shared one after unshare, and the config
of current repo is still respected over the config which came from source config
$ cd ../cloned
$ hg push ../shared1
pushing to ../shared1
searching for changes
adding changesets
adding manifests
adding file changes
error: pretxnchangegroup.reject_merge_commits hook failed: bcde3522682d rejected as merge on the same branch. Please consider rebase.
transaction abort!
rollback completed
abort: bcde3522682d rejected as merge on the same branch. Please consider rebase.
[255]
$ hg showconfig ui.curses -R ../shared1
false
$ cd ../
Test that upgrading using debugupgraderepo works
=================================================
$ hg init non-share-safe --config format.exp-share-safe=false
$ cd non-share-safe
$ hg debugrequirements
dotencode
fncache
generaldelta
revlogv1
sparserevlog
store
$ echo foo > foo
$ hg ci -Aqm 'added foo'
$ echo bar > bar
$ hg ci -Aqm 'added bar'
Create a share before upgrading
$ cd ..
$ hg share non-share-safe nss-share
updating working directory
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg debugrequirements -R nss-share
dotencode
fncache
generaldelta
revlogv1
shared
sparserevlog
store
$ cd non-share-safe
Upgrade
$ hg debugupgraderepo -q
requirements
preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
added: exp-sharesafe
processed revlogs:
- all-filelogs
- changelog
- manifest
$ hg debugupgraderepo --run -q
upgrade will perform the following actions:
requirements
preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
added: exp-sharesafe
processed revlogs:
- all-filelogs
- changelog
- manifest
repository upgraded to share safe mode, existing shares will still work in old non-safe mode. Re-share existing shares to use them in safe mode New shares will be created in safe mode.
$ hg debugrequirements
dotencode
exp-sharesafe
fncache
generaldelta
revlogv1
sparserevlog
store
$ cat .hg/requires
exp-sharesafe
$ cat .hg/store/requires
dotencode
fncache
generaldelta
revlogv1
sparserevlog
store
$ hg log -GT "{node}: {desc}\n"
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
Make sure existing shares still works
$ hg log -GT "{node}: {desc}\n" -R ../nss-share --config experimental.sharesafe-warn-outdated-shares=false
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
$ hg log -GT "{node}: {desc}\n" -R ../nss-share
warning: source repository supports share-safe functionality. Reshare to upgrade.
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
Create a safe share from upgrade one
$ cd ..
$ hg share non-share-safe ss-share
updating working directory
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd ss-share
$ hg log -GT "{node}: {desc}\n"
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
$ cd ../non-share-safe
Test that downgrading works too
$ cat >> $HGRCPATH <<EOF
> [extensions]
> share =
> [format]
> exp-share-safe = False
> EOF
$ hg debugupgraderepo -q
requirements
preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
removed: exp-sharesafe
processed revlogs:
- all-filelogs
- changelog
- manifest
$ hg debugupgraderepo -q --run
upgrade will perform the following actions:
requirements
preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
removed: exp-sharesafe
processed revlogs:
- all-filelogs
- changelog
- manifest
repository downgraded to not use share safe mode, existing shares will not work and needs to be reshared.
$ hg debugrequirements
dotencode
fncache
generaldelta
revlogv1
sparserevlog
store
$ cat .hg/requires
dotencode
fncache
generaldelta
revlogv1
sparserevlog
store
$ test -f .hg/store/requires
[1]
$ hg log -GT "{node}: {desc}\n"
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
Make sure existing shares still works
$ hg log -GT "{node}: {desc}\n" -R ../nss-share
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
$ hg log -GT "{node}: {desc}\n" -R ../ss-share
abort: share source does not support exp-sharesafe requirement
[255]
Testing automatic downgrade of shares when config is set
$ touch ../ss-share/.hg/wlock
$ hg log -GT "{node}: {desc}\n" -R ../ss-share --config experimental.sharesafe-auto-downgrade-shares=true
abort: failed to downgrade share, got error: Lock held
[255]
$ rm ../ss-share/.hg/wlock
$ hg log -GT "{node}: {desc}\n" -R ../ss-share --config experimental.sharesafe-auto-downgrade-shares=true
repository downgraded to not use share-safe mode
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
$ hg log -GT "{node}: {desc}\n" -R ../ss-share
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
Testing automatic upgrade of shares when config is set
$ hg debugupgraderepo -q --run --config format.exp-share-safe=True
upgrade will perform the following actions:
requirements
preserved: dotencode, fncache, generaldelta, revlogv1, sparserevlog, store
added: exp-sharesafe
processed revlogs:
- all-filelogs
- changelog
- manifest
repository upgraded to share safe mode, existing shares will still work in old non-safe mode. Re-share existing shares to use them in safe mode New shares will be created in safe mode.
$ hg debugrequirements
dotencode
exp-sharesafe
fncache
generaldelta
revlogv1
sparserevlog
store
$ hg log -GT "{node}: {desc}\n" -R ../nss-share
warning: source repository supports share-safe functionality. Reshare to upgrade.
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
Check that if lock is taken, upgrade fails but read operation are successful
$ touch ../nss-share/.hg/wlock
$ hg log -GT "{node}: {desc}\n" -R ../nss-share --config experimental.sharesafe-auto-upgrade-shares=true
failed to upgrade share, got error: Lock held
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
$ hg log -GT "{node}: {desc}\n" -R ../nss-share --config experimental.sharesafe-auto-upgrade-shares=true --config experimental.sharesafe-warn-outdated-shares=false
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
$ hg log -GT "{node}: {desc}\n" -R ../nss-share --config experimental.sharesafe-auto-upgrade-shares=true --config experimental.sharesafe-auto-upgrade-fail-error=true
abort: failed to upgrade share, got error: Lock held
[255]
$ rm ../nss-share/.hg/wlock
$ hg log -GT "{node}: {desc}\n" -R ../nss-share --config experimental.sharesafe-auto-upgrade-shares=true
repository upgraded to use share-safe mode
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo
Test that unshare works
$ hg unshare -R ../nss-share
$ hg log -GT "{node}: {desc}\n" -R ../nss-share
@ f63db81e6dde1d9c78814167f77fb1fb49283f4f: added bar
|
o f3ba8b99bb6f897c87bbc1c07b75c6ddf43a4f77: added foo