From patchwork Sat Nov 21 00:26:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: D9346: errors: create "similarity hint" for UnknownIdentifier eagerly in constructor From: phabricator X-Patchwork-Id: 47623 Message-Id: To: Phabricator Cc: mercurial-devel@mercurial-scm.org Date: Sat, 21 Nov 2020 00:26:39 +0000 martinvonz created this revision. Herald added a reviewer: hg-reviewers. Herald added a subscriber: mercurial-patches. REVISION SUMMARY No code wanted to do anything but to produce a hint from it anyway, so we might as well just store the hint in the exception (which already extended `Hint`). That way we can easily convert it to a `ConfigException` when it's parsing of configuration that fails. I was wondering if the purpose of lazily creating the string was so we don't create it in cases where it won't get printed anyway. However, I couldn't find any places where that could happen. If we do find such places, we could instead revert to making it lazy but add a function on `UnknownIdentifier` for creating the hint string. I dropped the comment saying "make sure to check fileset first, as revset can invoke fileset", which was added in 4e240d6ab898 (dispatch: offer near-edit-distance suggestions for {file,rev}set functions, 2015-01-26). I couldn't figure out what it meant. The author of that patch also did not remember the reason for it. Perhaps changes that have happened since then made it so it no longer matters. REPOSITORY rHG Mercurial BRANCH default REVISION DETAIL https://phab.mercurial-scm.org/D9346 AFFECTED FILES mercurial/error.py mercurial/scmutil.py CHANGE DETAILS To: martinvonz, #hg-reviewers Cc: mercurial-patches, mercurial-devel diff --git a/mercurial/scmutil.py b/mercurial/scmutil.py --- a/mercurial/scmutil.py +++ b/mercurial/scmutil.py @@ -150,13 +150,7 @@ ) else: write(_(b"hg: parse error: %s\n") % inst.message) - if isinstance(inst, error.UnknownIdentifier): - # make sure to check fileset first, as revset can invoke fileset - similar = error.getsimilar(inst.symbols, inst.function) - hint = error.similarity_hint(similar) - if hint: - write(b"(%s)\n" % hint) - elif inst.hint: + if inst.hint: write(_(b"(%s)\n") % inst.hint) diff --git a/mercurial/error.py b/mercurial/error.py --- a/mercurial/error.py +++ b/mercurial/error.py @@ -297,9 +297,12 @@ def __init__(self, function, symbols): from .i18n import _ - ParseError.__init__(self, _(b"unknown identifier: %s") % function) - self.function = function - self.symbols = symbols + similar = getsimilar(symbols, function) + hint = similarity_hint(similar) + + ParseError.__init__( + self, _(b"unknown identifier: %s") % function, hint=hint + ) class RepoError(Hint, Exception):