(SUP-2372) add pg_repack schema reset task

[pgrant87]

Task added to reset pg_repack schema

[MartyEwings]

Would it be possible to have exception handling when not running on a Primary Postgres DB?

[m0dular]

I looked at the enterprise_tasks code, and I think the approach here of checking if the pe-postgresql service is present is good. That's basically what we do to check for postgres versions in that code. So my feedback is basically opinions about bash tasks in general.

I wanted to turn this code into a bash helper for Bolt, but that hasn't happened as of yet. The main thing it gets you is error handling; specifically, it captures stderr to a temp file and returns it in a json structure if you call the fail function. Something a lot of shell tasks lack is returning a useful error message if something fails because you have to do it yourself. IMO I would like to see all of our tooling standardize on this, but we can discuss this. FWIW, ca_extend, facts, service, and package all use it.

[MartyEwings]

@m0dular so from my understanding, we package the common.sh, and update the .json, declare and source it at the top of the bash script, change all variables in the main script from PT_variable to just variable, and call fail or success instead of the various Echos?

[m0dular]

That's basically it! A metadata example is here. I think that task is a good example of how to use fail and success. We also need to source and declare it that way to keep shellcheck happy.

[MartyEwings]

@m0dular How does that look

[MartyEwings]

I have tested this task and it works for me