Mercurial > public > mercurial-scm > hg-stable
diff tests/test-upgrade-repo.t @ 30777:7de7afd8bdd9
repair: begin implementation of in-place upgrading
Now that all the upgrade planning work is in place, we can start
doing the real work: actually upgrading a repository.
The main goal of this commit is to get the "framework" for running
in-place upgrade actions in place.
Rather than get too clever and low-level with regards to in-place
upgrades, our strategy is to create a new, temporary repository,
copy data to it, then replace the old data with the new. This allows
us to reuse a lot of code in localrepo.py around store interaction,
which will eventually consume the bulk of the upgrade code.
But we have to start small. This patch implements adding new
repository requirements. But it still sets up a temporary
repository and locks it and the source repo before performing the
requirements file swap. This means all the plumbing is in place
to implement store copying in subsequent commits.
| author | Gregory Szorc <gregory.szorc@gmail.com> |
|---|---|
| date | Sun, 18 Dec 2016 16:59:04 -0800 |
| parents | 3997edc4a86d |
| children | 38aa1ca97b6a |
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--- a/tests/test-upgrade-repo.t Sun Dec 18 16:51:09 2016 -0800 +++ b/tests/test-upgrade-repo.t Sun Dec 18 16:59:04 2016 -0800 @@ -180,3 +180,76 @@ deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed + $ cd .. + +Upgrading a repository that is already modern essentially no-ops + + $ hg init modern + $ hg -R modern debugupgraderepo --run + upgrade will perform the following actions: + + requirements + preserved: dotencode, fncache, generaldelta, revlogv1, store + + beginning upgrade... + repository locked and read-only + creating temporary repository to stage migrated data: $TESTTMP/modern/.hg/upgrade.* (glob) + marking source repository as being upgraded; clients will be unable to read from repository + starting in-place swap of repository data + replaced files will be backed up at $TESTTMP/modern/.hg/upgradebackup.* (glob) + finalizing requirements file and making repository readable again + removing temporary repository $TESTTMP/modern/.hg/upgrade.* (glob) + copy of old repository backed up at $TESTTMP/modern/.hg/upgradebackup.* (glob) + the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified + +Upgrading a repository to generaldelta works + + $ hg --config format.usegeneraldelta=false init upgradegd + $ cd upgradegd + $ touch f0 + $ hg -q commit -A -m initial + $ touch f1 + $ hg -q commit -A -m 'add f1' + $ hg -q up -r 0 + $ touch f2 + $ hg -q commit -A -m 'add f2' + + $ hg debugupgraderepo --run + upgrade will perform the following actions: + + requirements + preserved: dotencode, fncache, revlogv1, store + added: generaldelta + + generaldelta + repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster + + beginning upgrade... + repository locked and read-only + creating temporary repository to stage migrated data: $TESTTMP/upgradegd/.hg/upgrade.* (glob) + marking source repository as being upgraded; clients will be unable to read from repository + starting in-place swap of repository data + replaced files will be backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob) + finalizing requirements file and making repository readable again + removing temporary repository $TESTTMP/upgradegd/.hg/upgrade.* (glob) + copy of old repository backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob) + the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified + +Original requirements backed up + + $ cat .hg/upgradebackup.*/requires + dotencode + fncache + revlogv1 + store + +generaldelta added to original requirements files + + $ cat .hg/requires + dotencode + fncache + generaldelta + revlogv1 + store + + $ cd ..