Provide JSON versions of the existing HTML compare and
compare/derivations pages. Refactor the code and extract some
functions to make this a little less painful.
Previously, the connections were not closed, so eventually PostgreSQL
would run out. Using a pool of connections would be better, but as a
short term solution, just close the connection after each request.
This is a service designed to provide information about Guix. At the
moment, this initial prototype gathers up information about packages,
the associated metadata and derivations.
The initial primary use case is to compare two different revisions of
Guix, detecting which packages are new, no longer present, updated or
otherwise different.
It's based on the Mumi project.
[1]: https://git.elephly.net/software/mumi.git
