tree e761fd37c968c89afb65c92bc22327f0c5a56dd2
parent ce0f4fa39c90ce507a4c740d39bf5aa3d91a9fcf
author Mike Frysinger <vapier@chromium.org> 1595849937 -0400
committer Commit Bot <commit-bot@chromium.org> 1595959827 +0000

create_venv: handle missing virtualenv better

Touch up the venvlib exceptions and have ENOENT errors from running
virtualenv throw the more specific VirtualenvMissingError.  Then we
can catch that at the top level to emit a short explanation for the
user to fix things (by installing virtualenv). rather than dumping
large tracebacks & logs that are meaningless to them.

BUG=chromium:1109615
TEST=`./run_pytest -h` w/out virtualenv shows a short error message

Change-Id: I8da8e51bdc995bbbc955bd1e47d704b5e81fc0d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra_virtualenv/+/2319393
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>