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Disambiguate various types of Mercurial remote markers with "hg arc-ls-remote"
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Authored by epriestley on Jun 9 2020, 5:27 PM.
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Summary

Ref T13546. Ref T9948. It seems challenging to examine a remote in vanilla Mercurial. Provide an "hg arc-ls-remote" command which functions like "git ls-remote" so we can figure out if "--into X" is a bookmark, branch, both, neither, or a branch with multiple heads without mutating the working copy as a side effect.

Test Plan

Ran various "arc land --into ..." commands in a Mercurial working copy, saw apparently-sensible resolution of remote marker names.

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rARC Arcanist
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