awless-ro v0.2.2

awless-ro v0.2.2

tail comes out of hiding, and tail scaling-activities says when there is nothing to
show.

tail is listed

tail shows recent CloudFormation stack events or autoscaling activities, or follows
them. It had been hidden from --help and completion since it first appeared upstream,
as an experiment — though it works, and the README already documented it. It is now
listed, with help and examples:

awless-ro tail stack-events my-stack                 # the last 10 events of a stack
awless-ro tail stack-events my-stack --follow        # follow a deployment until it completes
awless-ro tail scaling-activities -n 20              # the last 20 autoscaling activities
awless-ro tail scaling-activities --follow           # wait for new ones

tail scaling-activities with nothing to show

Two defects inherited from upstream:

• No activity printed nothing and exited 0, which reads the same as a command that
  failed silently. Autoscaling keeps six weeks of history, so in a quiet account this
  is the usual answer. It now says so — on stderr, so stdout stays the events alone.
• --follow returned at once when there was no activity yet, which is exactly when
  one waits for the first. It now polls from that moment on. An invalid --frequency
  is refused before any AWS call.

README

The README now opens with a short recorded demo, and its "What it is good for" section
says plainly how the tool gets its data: list, search, whoami and tail ask the
AWS API every time; show and inspect work on a synced graph of the account, which
is where relations come from; list, show and inspect take --local to answer from
that copy without calling AWS.

No change to any command's output, flag or exit code beyond the above, hence a patch
release. Full detail in
CHANGELOG.md.

Verified

Against a live account: tail stack-events prints the header and events, and fails
with exit 1 on a stack that does not exist; tail scaling-activities with no activity
prints the notice and exits 0; --follow keeps waiting.