This is required because if there are projects with the same name
loaded, that have elements in the same path, with the same contents,
they are considered the same, despite actually belonging to different
Projects.

This fixes buildstream issue #795

James Ennis authored Nov 30, 2018 and Jonathan Maw committed Dec 03, 2018

Test required to close #795 - We should be able to build a project which refers
to the same junction twice, but with two different filenames.

_yamlcache.py: Use a project's junction name if present

Closes #795

See merge request !980

This change makes `ArtifactCache.setup_remotes()` use a boolean parameter, set
by `Stream.push()` or `Stream.pull()`, to configure the overriden `remote_url`
correctly, instead of for `push` by default.

This fixes #798.

This change simplifies the responsibilities of `setup_remotes()` by extracting
"getting the default remotes" logic to its own function and moving "--remote"
related logic to _load(). The latter, especially, helps to remove the need of
passing the "remote_url" string and "can_push?" boolean to `setup_remotes()`.