# Shifter

    $ shifter promote test
    $ shifter promote staging
    $ shifter promote production

    - if previous env was not tagged before, set warnings

    $ shifter diff production
    $ shifter diff production --reverse

    - current tree against other tag/branch, using merged PRs description metadata to build a meaningful and colourful CHANGELOG.

    $ shifter promote -i test

    - you can interactively select which PRs are going to be.

    $ shifter rollback test
    $ shifter rollback staging
    $ shifter rollback production