rust: Add type annotation to fix inference on Rust Nightly
When compiling with Rust Nightly, the im-rs crate silently makes use of the
experimental language feature for trait impl specialization. This apperently
changes public its APIs in subtle ways such that type inference of some user
code can fail where it succeeds when specialization is disabled.
This made Mercurial’s Rust unit tests have compilation errors on Nightly.
I have not managed to find the exactl root cause, but I wrote down my findings
so far at https://github.com/bodil/im-rs/issues/188
This adds type annotation to make unit tests rely less on type inference
and work around the issue.
Differential Revision: https://phab.mercurial-scm.org/D10742
#require pytype py3 slow
$ cd $RUNTESTDIR/..
Many of the individual files that are excluded here confuse pytype
because they do a mix of Python 2 and Python 3 things
conditionally. There's no good way to help it out with that as far as
I can tell, so let's just hide those files from it for now. We should
endeavor to empty this list out over time, as some of these are
probably hiding real problems.
mercurial/bundlerepo.py # no vfs and ui attrs on bundlerepo
mercurial/changegroup.py # mysterious incorrect type detection
mercurial/chgserver.py # [attribute-error]
mercurial/cmdutil.py # No attribute 'markcopied' on mercurial.context.filectx [attribute-error]
mercurial/context.py # many [attribute-error]
mercurial/copies.py # No attribute 'items' on None [attribute-error]
mercurial/crecord.py # tons of [attribute-error], [module-attr]
mercurial/debugcommands.py # [wrong-arg-types]
mercurial/dispatch.py # initstdio: No attribute ... on TextIO [attribute-error]
mercurial/exchange.py # [attribute-error]
mercurial/hgweb/hgweb_mod.py # [attribute-error], [name-error], [wrong-arg-types]
mercurial/hgweb/server.py # [attribute-error], [name-error], [module-attr]
mercurial/hgweb/webcommands.py # [missing-parameter]
mercurial/hgweb/wsgicgi.py # confused values in os.environ
mercurial/httppeer.py # [attribute-error], [wrong-arg-types]
mercurial/interfaces # No attribute 'capabilities' on peer [attribute-error]
mercurial/keepalive.py # [attribute-error]
mercurial/localrepo.py # [attribute-error]
mercurial/lsprof.py # unguarded import
mercurial/manifest.py # [unsupported-operands], [wrong-arg-types]
mercurial/minirst.py # [unsupported-operands], [attribute-error]
mercurial/patch.py # [wrong-arg-types]
mercurial/pure/osutil.py # [invalid-typevar], [not-callable]
mercurial/pure/parsers.py # [attribute-error]
mercurial/pycompat.py # bytes vs str issues
mercurial/repoview.py # [attribute-error]
mercurial/sslutil.py # [attribute-error]
mercurial/statprof.py # bytes vs str on TextIO.write() [wrong-arg-types]
mercurial/testing/storage.py # tons of [attribute-error]
mercurial/ui.py # [attribute-error], [wrong-arg-types]
mercurial/unionrepo.py # ui, svfs, unfiltered [attribute-error]
mercurial/upgrade.py # line 84, in upgraderepo: No attribute 'discard' on Dict[nothing, nothing] [attribute-error]
mercurial/util.py # [attribute-error], [wrong-arg-count]
mercurial/utils/procutil.py # [attribute-error], [module-attr], [bad-return-type]
mercurial/utils/stringutil.py # [module-attr], [wrong-arg-count]
mercurial/utils/memorytop.py # not 3.6 compatible
mercurial/win32.py # [not-callable]
mercurial/wireprotoframing.py # [unsupported-operands], [attribute-error], [import-error]
mercurial/wireprotoserver.py # line 253, in _availableapis: No attribute '__iter__' on Callable[[Any, Any], Any] [attribute-error]
mercurial/wireprotov1peer.py # [attribute-error]
mercurial/wireprotov1server.py # BUG?: BundleValueError handler accesses subclass's attrs
mercurial/wireprotov2server.py # [unsupported-operands], [attribute-error]
TODO: use --no-cache on test server? Caching the files locally helps during
development, but may be a hinderance for CI testing.
$ pytype -V 3.6 --keep-going --jobs auto mercurial \
> -x mercurial/bundlerepo.py \
> -x mercurial/changegroup.py \
> -x mercurial/chgserver.py \
> -x mercurial/cmdutil.py \
> -x mercurial/context.py \
> -x mercurial/copies.py \
> -x mercurial/crecord.py \
> -x mercurial/debugcommands.py \
> -x mercurial/dispatch.py \
> -x mercurial/exchange.py \
> -x mercurial/hgweb/hgweb_mod.py \
> -x mercurial/hgweb/server.py \
> -x mercurial/hgweb/webcommands.py \
> -x mercurial/hgweb/wsgicgi.py \
> -x mercurial/httppeer.py \
> -x mercurial/interfaces \
> -x mercurial/keepalive.py \
> -x mercurial/localrepo.py \
> -x mercurial/lsprof.py \
> -x mercurial/manifest.py \
> -x mercurial/minirst.py \
> -x mercurial/patch.py \
> -x mercurial/pure/osutil.py \
> -x mercurial/pure/parsers.py \
> -x mercurial/pycompat.py \
> -x mercurial/repoview.py \
> -x mercurial/sslutil.py \
> -x mercurial/statprof.py \
> -x mercurial/testing/storage.py \
> -x mercurial/thirdparty \
> -x mercurial/ui.py \
> -x mercurial/unionrepo.py \
> -x mercurial/upgrade.py \
> -x mercurial/utils/procutil.py \
> -x mercurial/utils/stringutil.py \
> -x mercurial/utils/memorytop.py \
> -x mercurial/win32.py \
> -x mercurial/wireprotoframing.py \
> -x mercurial/wireprotoserver.py \
> -x mercurial/wireprotov1peer.py \
> -x mercurial/wireprotov1server.py \
> -x mercurial/wireprotov2server.py \
> > $TESTTMP/pytype-output.txt || cat $TESTTMP/pytype-output.txt
Only show the results on a failure, because the output on success is also
voluminous and variable.