Matching action alias for 'pack install xxx' returns an error

[nmaludy]

SUMMARY

Noticed by @ravi on Slack.

When running st2 action-alias match 'pack install vsphere' multiple action-aliases are matched, causing an error.

This is confusing in two ways:

1. Running that action-alias should not be ambiguous
2. The help message for st2 action-alias match says it returns a list of matching aliases, but instead it either returns one or it errors.

ISSUE TYPE

• Bug Report

STACKSTORM VERSION

$ st2 --version
st2 2.10.1, on Python 2.7.5

OS / ENVIRONMENT / INSTALL METHOD

# OS
$ cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 7.6 (Maipo)

# Install method
puppet-st2

STEPS TO REPRODUCE

$ st2 action-alias match 'pack install vsphere'

EXPECTED RESULTS

$ st2 action-alias match 'pack install vsphere'
+--------------+-----------------------------------+
| name         | description                       |
+--------------+-----------------------------------+
| pack_install | Install/upgrade StackStorm packs. |
+--------------+-----------------------------------+

ACTUAL RESULTS

$ st2 action-alias match 'pack install vsphere'
ERROR: 400 Client Error: Bad Request
MESSAGE: Command 'pack install vsphere' matched more than 1 pattern for url: http://127.0.0.1:9101/v1/actionalias/match

This is also confusing because st2 action-alias match --help says it should return a list of matching aliases, when instead it either returns a single alias or it errors out if multiple are found.

$ st2 action-alias match --help
usage: st2 action-alias match [-h] [-t TOKEN] [--api-key API_KEY] [-j] [-y]
                              [-a ATTR [ATTR ...]] [-w WIDTH [WIDTH ...]]
                              command

Get the list of action aliases that match the command text.

INVESTIGATION

It appears that the action-alias packs.pack_install has redundant patterns defined: https://github.com/StackStorm/st2/blob/master/contrib/packs/aliases/pack_install.yaml#L7-L12

I think the simplest fix is to remove the redundant pattern and change the display text for the one that is left behind.