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conflicted 1.0.0
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@hadley hadley released this 16 Sep 16:41
v1.0.0
cab23f8

New functions

  • conflict_scout() reports all conflicts found with a set of packages.

  • conflict_prefer() allows you to declare a persistent preference
    (within a session) for one function over another (#4).

Improve conflict resolution

  • conflicts now generally expects packages that override functions in base
    packages to obey the "superset principle", i.e. that foo::bar(...) must
    return the same value of base::bar(...) whenever the input is not an
    error. In other words, if you override a base function you can only extend
    the API, not change or reduce it.

    There are two exceptions. If the arguments of the two functions are not
    compatible (i.e. the function in the package doesn't include all
    arguments of the base package), conflicts can tell it doesn't follow
    the superset principle. Additionally, dplyr::lag() fails to follow
    the superset principle, and is marked as a special case (#2).

  • Functions that have moved between packages (i.e. functions with a call to
    .Deprecated("pkg::foo")) as the first element of the function body) will
    never generate conflicts.

  • conflicted now listens for detach() events and removes conflicts that
    are removed by detaching a package (#5)

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