The set of relevant markers is currently unordered. Therefore the
markers will be added in arbitrary order. We sort the list of markers
beforehand to ensure stable output for testing.
We are going to only exchange markers relevant to the exchanged
changesets. So we need to change this marker to use a known changeset as
a successor instead of a precursor.
We add a ``--record-parents`` flag to debugobsolete. This can be used to record
parent information in the marker when the precursors are known locally. This
will be useful to test the "relevant markers" computation.
The discovery of necessary bookmark updates is now done within the "discovery
phase". This opens the door to the inclusion of bookmarks in a unified bundle2
push.
This fixes a crash that may happen when using mercurial 3.0.x.
The _gethiddenblockers function assumed that the output of tags.readlocaltags()
was a dict mapping tags to of valid nodes. However this was not necessarily the
case. When a repository had obsolete revisions and had local tag pointing to a
non existing revision was found, many mercurial commands would crash.
This revision fixes the problem by removing any tags from the output of
tags.readlocaltags() which point to invalid nodes.
We may want to add a warning when this happens (although it might be
annoying to get that warning for every command, possibly even more than once per
command).
A test for this problem has been added to test-obsolete.t. Without this fix the
test would output:
$ hg tags
abort: 00changelog.i@3816541e5485: no node!
[255]
Instead of:
$ hg tags
tiptag 2:3816541e5485
tip 2:3816541e5485
visible 0:193e9254ce7e
Previously, only bookmarks would be considered for blocking a changeset from
being hidden. Now, we also consider non-global tags. This is helpful if we have
local tags that might be hard to find once they are hidden, or tag that are
added by extensions (e.g. hggit or remotebranches).
If there is no outgoiing changesets but we have filtered revision in outgoing.excluded
We run into a filtering related crash. The excluded revision should not be there
in the first place but discovery need cleanup in default, not stable.
In its current state discovery may return (remotely) filtered elements
in "common". This has usually no impact as "missing" is kept clear of
filtered elements. However when the "remote" repo is a local repo (disk
accessible, and directly created in memory) the incoming code takes a
shortcut and directly uses the "remote" repo to generate the incoming
output. When some common elements are filtered this led to a crash. We
now ensure we use an unfiltered repository to generate the incoming
output. This does not change the behavior as missing is clear of
filtered revision.
Now that we have proper low level filtering, incoming code needs a
deeper cleanup but it is already planned.
This options add a new `web.view` to control filter level of hgweb.
This option have two purposes:
1) Allow fall back to unfiltered version in case a yet undetected by critical
bug is found in filtering after 2.5 release
2) People use hgweb as a local repoviewer. When they have secret changesets,
they wants to use "visible" filter not "served"
(modified by mpm, documentation deferred)
We noa pass an unfiltered repo in the same way `localrepo.push` does. This does
not alter outgoing behavior and prevents possible crash with computing
common/missing.
The `findcommonincoming` code could be simplified to make this unnecessary, but
this is too much change for the freeze.
We can not use `len(repo,changelog)`, it may be a filtered revision. We now use
`repo,changelog.tip()` to fetch this information.
The `tip` command is also fixed and tested
Thanks goes to Idan Kamara for the initial report.
If there is no outgoiing changesets but we have filtered revision in outgoing.excluded
We run into a filtering related crash. The excluded revision should not be there
in the first place but discovery need cleanup in default, not stable.
This is necessary to enforce filtering. The result is a bit buggy (may provide
less changeset than expected, but it will stop crashing on filtered revision
access.
Note that changelog.revs can not represents empty iteration like xrange did. So
we have to explicitly prevent call when there is nothing to do.
This changeset checks that a revision is known before adding it to the
navigation.
This will prevent traceback on filtered repository. This changeset result in an
incorrect behaviors, Navigation link may be dropped without any replacement.
However this bad navigation generation is much better than a crash
Since 3230dd238cf7 hgweb is broken with filtering. This changeset add test that
should pass once it is fixed. Test currently broken are commented and will be
uncommented by changeset that fix them.
The filelog test is currently passing because we already have some hack in core
regarding filelog (see 83a1b777fc02).
The dispatch code now enables filtering of "hidden" changesets globally. The
filter is installed before command and extension invocation. The `--hidden`
switch is now global and disables this filtering for any command.
Code in log dedicated to changeset exclusion is removed as this global filtering
has the same effect.
This is the second real use of changelog filtering. The change is very small to
allow testing the new filter with a setup close to the original one.
We replace custom post processing on `heads`function by call to the standard
code pass on a filtering repo.
In later coming will have wider usage of filtering that will make the dedicated
function useless.
We push between two repo which once filtered looks unrelated. Weakness in the
current implementation allows this push to be done without -f. But later
improvement with filtering will make this push fails for unrelatedness. However
we want this push to fail for including bumped changeset. So we had a smaller
push --force to make them related.
This applies the same logic as used for `obsolete` and `unstable` changesets.
Refuse to push them without force.
We'll probably want to factor this logic with two new functions
`pctx.troubled()` and `ctx.troubles()`. But I'm waiting for the third
"trouble" to make it into core.
The first obsolescence flag is introduced to allows for fixing the "bumped"
changeset situation.
bumpedfix == 1.
Creator of new changesets intended to fix "bumped" situation should not forget
to add this flag to the marker. Otherwise the newly created changeset will be
bumped too. See inlined documentation for details.
This options allows to specify the `flag` part of obsolete markers. For details
about marker flags, check the `mercurial/obsolete.py` documentation. Some random
flag are added to a marker to test this feature.
Nullid as successors create multiple issues:
- Nullid revnum is -1, confusing algorithm that use revnum unless you add
special handling in all of them.
- Nullid confuses "divergent" changeset detection and resolution. As you can't
add any successors to Nullid without being in even more troubles
Fortunately, there is no good reason to use nullid as a successor. The only
sensible meaning of "succeed by nullid" is "dropped" and this meaning is already
covered by obsolescence marker with empty successors set.
However, letting some nullid successors to slip in may cause terrible damage in
such algorithm difficult to debug. So I prefer to perform and clear detection of
of such pathological changeset. We could be much smarter by cleaning up nullid
successors on the fly but it would be much for expensive. As core Mercurial does
not create any such changeset, I think it is fine to just abort when suspicious
situation is detected.
Earlier experimental version created such changesets, so there are some out
there. The evolve extension added the necessary logic to clean up its mess.
Obsolete markers wide-usage and propagation should be avoided by default until
the obsolete feature is more mature.
This changeset introduce the `_enable` variable and prevent the creation of
obsolete marker if the feature is set to `False` (the default).
More limitation comes in followup changesets.
This change adds `obsstore` to the list of files copied by local clone,
until now changesets were copied without their obsolete markers.
Note: extinct changesets were and are still included by such clones to
enable hardlinking. There is no obvious reason to prevent their exchange
here.
Rebased by Patrick Mezard <patrick@mezard.eu>
If we push some successors they will likely create a new head on
remote. However as the obsoleted head will disappear after the push we
are not really increasing the number of heads.
There is several case which will lead to extra being actually pushed. But this
first changeset aims to be simple. See the inline comment for details.
Without this change, you need to push --force every time you want to
push a newer version which is very error prone.
The remote side still display +n heads on unbundle because it does not have the
obsolete marker at unbundle time.
The repo.hiddenrevs set is updated with all extinct() changesets which aren't
descendants of either:
- the current working copy,
- a bookmark,
- a tag.
Extinct changesets are excluded from all exchange operations. This is a silent
exclusion because the user should not need to be aware of them.
There is no reason to strongly enforce this exclusion except implementation
simplicity. User should be able to explicitly request an extinct changeset in
the future.
`extinct` changesets are obsolete changesets with obsolete descendants only. They
are of no interest anymore and can be:
- exclude from exchange
- hidden to the user in most situation
- safely garbage collected
This changeset just allows mercurial to detect them.
The implementation is a bit naive, as for unstable changesets. We better use a
simple revset query and a cache, but simple version comes first.
User should resolve unstability locally before pushing the same way we encourage
user to merge locally instead of pushing a new remote head.
If we are to push obsolete changeset, at least one set of the pushed set will be
either obsolete or unstable. The check is narrowed to only heads.
An unstable changeset is a changeset *not* obsolete but with some obsolete
ancestors.
The current logic to decide if a changeset is unstable is naive and very
inefficient. A better solution is to compute the set of unstable changeset with
a simple revset and to cache the result. But this require cache invalidation
logic. Simpler version goes first.
Marker are now written as soon as possible but within a transaction. Using a
transaction ensure a proper behavior on error and rollback compatibility.
Flush logic are not necessary anymore and are dropped from lock release.
With this changeset, the obsstore is open, written and closed for every single
added marker. This is expected to be highly inefficient and batched write should
be implemented "quickly".
Another issue is that every flush of the file will invalidate the obsstore
filecache and trigger a full re instantiation of the repo.obsstore attribute
(including, reading and parsing entry). This is also expected to be highly
inefficient and proper filecache operation should be implemented "quickly" too.
A side benefit of the filecache issue is that repo.obsstore object is properly
invalidated on transaction abortion.
Changeset detected as obsolete will be displayed as "x" instead of 'o':
o new rewritten changeset
|
| x old obsolete changeset
|/
|
o base
This will be useful even when some obsolete changeset will be "hidden" because
not all obsolete changeset can be hidden. If an obsolete changeset have
non-obsolete descendant we can't simply hide it. And having a clear visual hint
that the changeset is obsolete is useful.
The main reason to make this minor change right now is to:
1) introduce an officiel user of the `ctx.obsolete()` method that will detect
breakage earlier than third party code (mutable, hgview)
2) Do not display any vocabulary related to obsolete. Such vocabulary will
require discussion.
