Replace the Guile-side HTML escaping with a less complete, but hopefully
faster PostgreSQL side HTML escaping approach.
Also, allow reading part of the log, by default, the last 1,000,000
characters, as this should render quickly.
It isn't very useful, as you have to know the commits. Now that there's Git
branch information, it should be possible to access this in a more useful way.
To the compare/derivations page. Previously, the compare/derivations page was
comparing more than the derivations, notably the package metadata. This change
avoids that, and also reduces the information overload on the compare page.
So that they can also be used for the /branch/foo/latest-processed-revision
pages. The content is the same, but the title, link, and some of the links on
the page are different.
Previously, one of the first things that happened when responding to a request
was a database connection was made, even when serving the CSS. This is
unnecessary, so move the database connection handling in to the controller.
Also, to allow for separating it out from the assets, separate the assets out
from the parts of the controller that require a database connection.
Given that the headers may be the same, regardless whether it's HTML or JSON
being sent in the body of the response, I think it makes more sense to handle
the headers in the controller.
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.
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.
Add some new pages /branches and /branch/... as well as a new git_branches
table. Also extend the email processing to enter the branch information in to
the database.
Rather than just storing the URL in the guix_revisions and
load_new_guix_revision_jobs tables. This will help when storing more
information like tags and branches in the future.
