view CONTRIBUTING @ 39123:4d7b11877dd0

filemerge: add the function to examine a capability of a internal tool

For "symlink" and "binary" capabilities, _toolbool() can not examine
these of internal merge tools strictly, because it examines only
configurations in "merge-tools" section.

Users can configure them explicitly as below for example, but this is
not ordinary usage and not convenient:

  [merge-tools]
  :other.symlink = true
  :other.binary = true

This patch adds hascapability() internal function, which can examine
actual capabilities of a internal merge tool strictly.

At this patch, hascapability() is still used with "strict=False".
Subsequent patches use it with "strict=True".

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).