The licenses table, along with the package_metadata table had duplicate
values. This could happen as the unique constraints on those tables didn't
properly account for the nullable fields.
The duplicates in those tables also affected the license_sets, packages,
package_derivations tables in a similar way. Finally, the
guix_revision_package_derivations table was also affected.
This commit adds a migration to fix the data, as well as the constraints. THe
code to populate the licenses and package_metadata tables is also updated.
And display this on the package page.
This uses a couple of new tables, and an additional field in the
package_metadata table.
Currently, the order of the licenses in the package definition isn't stored,
as I'm not sure the order in the list is significant.
On one code path, they were handled as numbers, whereas elsewhere they were
handled as strings. This led to the package-metadata code trying to insert
duplicate entries.
Instead, just handle them as strings everywhere.
Store the location a package can be found at, and display this on the package
page.
If available, link off to the git repository containing the package.
I'm thinking about adding more fields to this table, and the sha1_hash values
will make this tricker.
Therefore, remove the value, and adjust the existing code to cope. This commit
also adds a new test which coveres some of the changed functionality.
A large proportion of these changes relate to changing the way
packages relate to derivations. Previously, a package at a given
revision had a single derivation. This was OK, but didn't account for
multiple architectures.
Therefore, these changes mean that a package has multiple derivations,
depending on the system of the derivation, and the target system.
There are multiple changes, small and large to the web interface as
well. More pages link to each other, and the visual display has been
improved somewhat.
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
