Easier to maintain one or many old lockfiles with blend #744
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We have been working in blend an hex package to solve the following problem.
How do you run mix test against different version of the same dependency?
We saw that in surface there is the need to run tests against phoenix_live_view 0.19.x and 0.20.x.
This was solved by adding a mix.lock.old and running mv command in the CI
With blend we attempt to make it easier to maintain the current old lockfile, and at the same time leave the groundwork to make it trivial to test against more (2 or more) lockfiles in the future when a newer version of phoenix_live_view is out".
Let me know if this make sense or you have any feedback about it.
Currently the CI is failing for phoenix_live_view 0.20.14 but there is an open PR to fix that.