This closes#9966. It was looking at the query parameters
for the namespace and region, but allocation (and task!)
routes don’t have a namespace query parameter. Since the URL
generator requires the job for all calls, it makes sense to
extract the namespace and region from the job instead.
Thanks to @notnoop for this UX improvement suggestion.
The allocation’s task group is always known, so it
might as well be preselected in the sidebar when the
exec window opens. Also, if the task group only has
one task, might as well preselect it too.
This connects Xterm.js to a Nomad exec websocket so people
can interact on clients via live sessions. There are buttons on
job, allocation, task group, and task detail pages that open a
popup that lets them edit their shell command and start a
session.
More is to come, as recorded in issues.
