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Avoid updating registry when adding existing deps #3144

Merged
merged 1 commit into from
Oct 6, 2016
Merged

Avoid updating registry when adding existing deps #3144

merged 1 commit into from
Oct 6, 2016

Commits on Sep 30, 2016

  1. Avoid updating registry when adding existing deps 

    Cargo previously erroneously updated the registry whenever a new dependency was
added on a crate which already exists in the DAG. This commit fixes this
behavior by ensuring that if the new dependency matches a previously locked
version it uses that instead.

This commit involved a bit of refactoring around this logic to be a bit more
clear how the locking and "falling back to the registry" is happening.

Closes rust-lang#2895
Closes rust-lang#2931
    @alexcrichton
    alexcrichton committed Sep 30, 2016
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