patch: catch unexpected case in _inlinediff If operation is neither 'diff.inserted' or 'diff.deleted', label and token won't be define. This patch explicitely catches that exception.

patch: reverse _inlinediff output for consistency

phases: drop the list with phase of each rev, always comput phase sets Change the C implementation of phasecache.loadphaserevs to provide only the sets for draft and secret phase as well as the number of revisions seen. Change the pure Python implementation of the same functino to compute the sets instead of the list of phases for each revision. Change phasecache.phase to check the phase sets and assume public if the revision is in neither draft nor secret set. This is computationally slightly more expensive. Change phasecache.getrevset for public() based queries to compute the set of non-matching revisions and return the result as filtered fullreposet. A shortcut is taken when no draft or secret revision exists. Bump the module version for the changed interface contract. Overall, this saves around 16 Bytes per revision whenever the phasecache is used, for the test case in issue5691 it is around 3MB. getrevset() for a large repository is around 13% slower here, that seems an acceptable trade off. Performance impact for phase() should be similar. Differential Revision: https://phab.mercurial-scm.org/D1606

transaction: build changes['revs'] as range instead of a set Revisions are added consecutively, so a range can easily represent them in the changes list. This saves around 45 Bytes / revision on 64bit platforms and reduces the memory footprint of issue5691 by 15MB. Don't copy changes['revs'] in getobsoleted. Ranges have a very efficient contains implementation already. Differential Revision: https://phab.mercurial-scm.org/D1615

ui: add diff.showfunc to tweakdefaults This is a little risky, as I think we can have some encoding weirdness crop up. showfunc also isn't the most robust feature, but it's still often useful context... Differential Revision: https://phab.mercurial-scm.org/D1610

ui: add curses interface to tweakdefaults This was part of the original proposal, and while *I* don't like the curses interface, most users anecdotally seem to greatly prefer it to plain text interfaces. Differential Revision: https://phab.mercurial-scm.org/D1609

push: restrict common discovery to the pushed set This changeset make use of the ability of the set discovery to only search common changeset for a subset of the repository. Restricting that search to the pushed set avoid potential waste of time finding out the status of many unrelated related revision. Repository with many heads were especially badly affected by this. Here is an example of findcommonhead discovery for pushing 11 outgoing changeset on a repository with tens of thousand of unrelated heads. (discovery run over a ssh link to localhost). Before: queries: 92 time: 44.1996s After: queries: 3 time: 0.6938s A x63 speedup even with a network link without latency.

setdiscover: allow to ignore part of the local graph Currently, the push discovery first determines the full set of common nodes before looking into what changesets are outgoing. When pushing a specific subset, this can lead to pathological situations where we search for the status of thousand of local heads that are unrelated to the requested pushes. To fix this, we need to teach the discovery to ignores part of the graph. Most of the necessary pieces were already in place. This changeset just makes them available to higher level API and tests them. Change actually impacting pushes are coming in a later changeset.

largefiles: allow to run 'debugupgraderepo' on repo with largefiles The extensions wrap the necessary function to ensure the 'largefiles' requirements won't be dropped. It is now possible to run `hg debugupgraderepo` on a repository with largefiles.

upgraderepo: allow extension to register preserved requirements Some requirement does not directly result from config and needs more advanced logic to be preserved. The current example is 'largefiles'. We add a hook point in the upgrade code so that extensions can handle these cases. The 'largefiles' extension will use it in the next changeset.

revset: make follow() accept empty startrev This is the same behavior as ancestors(emptyset).

revset: alias follow(startrev=rev) to ancestors(rev) This seems natural given 'log -frREV' (with no file pattern) is equivalent to 'log -frREV *'.

revset: make follow() accept keyword arguments Also renamed the argument from 'pattern' to 'file' conforming to followlines().

revset: make follow() accept multiple startrevs The diff might look slightly complicated, but the initial "c = repo['.']" was effective if rev = None.

dagop: use heap to compute max rev in filectxancestors()

dagop: add smartset interface to filectxancestors() The original filectx API is kept public since we'll need it to walk ancestor (rev, match) pairs efficiently. The current implementation scans ancestors twice for 'hg log -fp FILE'.

overlayworkingctx: add `_checkexist(path)` This is in preparation to switch this class to inheriting (and being based off a) `commitctx` instead of a `workingctx`. `filectx` has no `exists` function, so this is how we'll fall back in that case. Differential Revision: https://phab.mercurial-scm.org/D1237

overlayworkingctx: fix a bad reference to `self._path` Differential Revision: https://phab.mercurial-scm.org/D1236

overlayworkingctx: track copy information in the context We can no longer do so in the dirstate, so add the functions to do so here. Differential Revision: https://phab.mercurial-scm.org/D1235

rebaseruntime: raise InMemoryMergeConflictsError on merge conflicts Differential Revision: https://phab.mercurial-scm.org/D1234

rebase: do not bail on uncomitted changes if rebasing in-memory Differential Revision: https://phab.mercurial-scm.org/D1233

rebase: add the --inmemory option flag; assign a wctx object for the rebase In the future, the --inmemory flag might be deprecated in favor of something more intelligent (for example, always rebasing in-memory if the working copy parent isn't in the rebaseset). But we might keep it as a way to explicitly force IMM on or off. Differential Revision: https://phab.mercurial-scm.org/D1232

overlayworkingctx: move _wrappedctx out of the constructor With rebase, we will be setting the _wrappedctx at a different point from the wctx construction (somewhat later, and possibly several times). Move it to a public function. Differential Revision: https://phab.mercurial-scm.org/D1231

merge: don't check for unknown files in IMM Differential Revision: https://phab.mercurial-scm.org/D1214