Add collector custom arguments

[aoblet]

This allows to:

• interact with hook collector at runtime
• based on user input, modulate some item properties

By refactoring the way we prepare arguments to run_process_file and run_process_file, maybe that _get_process_args is less easier to read than before.. What do you think ?

[coveralls]

Coverage increased (+0.9%) to 87.182% when pulling e23599d on mikrosimage:collection_args into dbf952c on shotgunsoftware:master.

[thebeeland]

Thanks so much for sending this our way, @aoblet. I've logged an internal ticket to have it reviewed, so we will take a closer look as soon as we can.

[jfboismenu]

Hi @aoblet , I'm sorry we haven't been able to get back to your PR yet. I think I may have given the impression when we were discussing on Zendesk that we'd look at this right away, but it's become clear to us that we're kinda slammed at the moment and are not able to take the time we need to review client PRs and take them through the finish line. I'm deeply sorry about this.

Have you had success using these changes in production? Is there anything you feel like you'd like to improve?

[aoblet]

No worries. On our side, these changes are in production and are doing the job.

[eprana]

@aoblet @jfboismenu Hi guys, any update about this PR ?

[charltk]

Hi @eprana - could you tell us a little more about how you've been using this functionality in production? I'm curious about the specific use cases that you've been able to address with the collector custom arguments that weren't possible before.