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Allow "hg arc-ls-markers" to run under Python 2 or Python 3

Authored by epriestley on Jul 6 2020, 10:29 PM.



Ref T13546. See PHI1805. Currently, the "arc-ls-markers" extension doesn't run under Python 3:

  • some stuff needs "b'...'" to mark it as a byte string;
  • "dict.iteritems()" is gone in Python 3, and "mercurial.pycompat" isn't always available;
  • in Python 3, "json" refuses to print byte strings; and
  • the compiler caching behavior in Python 3 has changed.

Try to get these things working in the same way under Python 2 and Python 3.

Test Plan

Ran this command (with python as Python 2, locally):

$ python /usr/local/bin/hg --config 'extensions.arc-hg=/Users/epriestley/dev/core/lib/arcanist/support/hg/' arc-ls-markers --

...and this command:

$ python3 /usr/local/bin/hg --config 'extensions.arc-hg=/Users/epriestley/dev/core/lib/arcanist/support/hg/' arc-ls-markers --

..and saw the same output in both cases (previously, python3 ... fataled in various ways).

Diff Detail

rARC Arcanist
Automatic diff as part of commit; lint not applicable.
Automatic diff as part of commit; unit tests not applicable.