The raven client inspects the traceback and attempts to figure out which
parts belong to the app and which belong to external libraries. It uses
a whitelist of paths to identify application code. Previously we had been
using the list of repository names, but that was incorrect because the
plugin "liveupdate" is actually called "reddit_liveupdate" in the traceback.
The whitelist was also incomplete because it didn't account for scripts run with
paster run which can have a path like /opt/something/script.py.
This creates a sys.excepthook handler that reports any exceptions
to Sentry. This results in double reporting errors when in script
mode because the exception is re-raised and caught by that handler.
We can conduct experiments that impact how pages are rendered across
users, bucketing pages according to the fullname, so that search engines
will crawl and index the same experimental content that users see. We
support subreddit listings pages, comments pages, and comment permalink
pages. We use the link fullname for both comments pages and comment
permalink pages, so that they are bucketed together.
We don't want to spend crawl budget or rank on what are essentially
duplicate pages. In case we have inbound links to these pages, we don't
want the robots.txt to prevent crawlers from accessing them.
Adds another optional argument to sprites to set the desired pixel
ratio. HDPI sprites are added to the spritesheet normally, and the
pixel ratio scales the background position and size rules.
Expandos got a css rule added to them to support the NSFW interstitial
flow, but this caused some unintended bugs with subreddit CSS. The
positioning of the interstitial's button on the media preview overlay
is dependent on the floating, so this moves the application of the
float rule to a child element on media previews only so the expando
element itself can remain unfloated.
Subreddit sticky posts (announcements) were originally implemented with
only allowing a single sticky to be set. When we added support for a
second sticky, there was some transitional code added that would handle
automatically converting the old single sticky to the new storage format
for multiple.
Everything's been long converted now, so this is no longer necessary to
keep around.
This fed non-Exception events into /admin/errors. None of these have been
actively monitored for years. If we do care about monitoring stuff like
this we should use graphite or Sentry.
