scmutil: introduce shortesthexnodeidprefix() We have scmutil.resolvehexnodeidprefix() for resolving a prefix to a full nodeid, so it makes sense to have the inverse method next to it. For now it just delegates to changelog.shortest(), but it will soon also make sure it's called on the unfiltered repo, to match resolvehexnodeidprefix(). Note that the change in show.py also makes it so the conversion from revnum to nodeid is done on the filtered repo, but that should be inconsequential since the revs are all from the filtered repo anyway. Differential Revision: https://phab.mercurial-scm.org/D3370

scmutil: use resolvehexnodeidprefix() from revsymbol() I should have copied this from changectx.__init__ into in 35b34202dd3b (context: handle partial nodeids in revsymbol(), 2018-04-08). Differential Revision: https://phab.mercurial-scm.org/D3310

scmutil: rename resolvepartialhexnodeid() to resolvehexnodeidprefix() I'm going to wrap revlog.shortest() in scmutil. I plan on calling it shortesthexnodeidprefix(). resolvehexnodeidprefix() matches that better. Also, "prefix" carries more information than "partial". Differential Revision: https://phab.mercurial-scm.org/D3309

scmutil: document that isrevsymbol() raises on ambiguous node prefix Differential Revision: https://phab.mercurial-scm.org/D3308

context: set stack level for deprecation warning This patch makes the deprecation warning print the caller of repo.__getitem__. That's not quite correct, since there could also be other callers of changectx.__init__, but it seems like the most helpful stack level in practice. Differential Revision: https://phab.mercurial-scm.org/D3307

util: set correct stack level on deprecation warnings Without this patch, you'll get something like this: <path>/mercurial/util.py:3784: DeprecationWarning: 'util.hgexecutable' is deprecated, use 'utils.procutil.hgexecutable' (but on one line) Differential Revision: https://phab.mercurial-scm.org/D3331

revset: pass in lookup function instead of repo (API) And document that it's only for legacy lookup. If we have a repo, we're likely to do more things where that shouldn't be done.

revset: drop support for posttreebuilthook() (API) AFAIK, the only user was the directaccess extension, which is in core now.