phabricator: treat non-utf-8 text files as binary as phabricator requires
Phabricator can't cope with text files that are not UTF-8, so requires them to
be submitted as binary files instead. This has the unfortunate effect of
making them practically unreviewable in Phabricator since it will only display
the separate versions of the file in other views, not a diff. `phabread`ing
such submissions are similar, since it will just output the binary patch, but
`hg import` copes with it fine and `hg diff` afterwards will show the actual
changes. It is still a marked improvement over trying to submit them as text,
which just leads to corruption (Phabricator will either output ? or HTML
entities for non-UTF-8 characters, depending on context).
Running decode on the whole file like this seems slightly unfortunate, but I'm
not aware of a better way.
Needs to be done to p1() version as well to detect conversions to UTF-8.
Differential Revision: https://phab.mercurial-scm.org/D7054
Our full contribution guidelines are in our wiki, please see:
https://www.mercurial-scm.org/wiki/ContributingChanges
If you just want a checklist to follow, you can go straight to
https://www.mercurial-scm.org/wiki/ContributingChanges#Submission_checklist
If you can't run the entire testsuite for some reason (it can be
difficult on Windows), please at least run `contrib/check-code.py` on
any files you've modified and run `python contrib/check-commit` on any
commits you've made (for example, `python contrib/check-commit
273ce12ad8f1` will report some style violations on a very old commit).