Tank updates, python, non-interactive - always answer no

Pipeline Integrations
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Hi,

I’ve found this topic on shotgun support from 2015 which shows how to run tank updates command via tk-core but, unfortunately, it’s not exactly what I need. I’m looking for ways to do non-interactive dry-runs basically, generating a report without actually updating anything.

From what I found so far (reading through the code), there is no easy way to do this without re-implementing the “updates” command.

I’ve already accepted this and started working on it, but just in case someone has already tried something like this and has a better idea, I’d be quite thankful to hear it.

Thanks,
–Aleksandar

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Yeah I think you’re correct there would be no easy way to do a dry run.

One thing you could do, that might be easier to implement, is have your tool copy the config to a temporary location, then run the updates on that, and perform a diff between the two and clear out the temp config.
This might help:

# Get the command for updating configs, from the sgtk instance
core_cmd = tk.get_command("updates")
# Now update an external config in thee given path
core_cmd.execute({"external":"/Users/philips1/Downloads/config 2"})
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Hi Philip,

Thanks for the answer and the suggestion. I’ve seen this option and considered it, but deemed it … inelegant. Perhaps not very wisely, though… Having to maintain the update analysis code ourselves when otherwise avoidable is also not ideal. Well, I’ll see.

Thanks in any case!

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Yeah thats fair enough, I agree its not an elegant solution, though in my personal opinion, I guess I would prefer it to having to maintain the update code. I don’t think there is a wrong or right answer here.

That said I’ll pop an idea suggestion into our roadmap page on your behalf.

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I have another idea, which I’ve not tried and would be quite inelegant as well :smile:

Use subprocess to call the tank command file and the comunicate back with it. Say “no” to all updates but read the output, and parse it into a list of bundles that need updating.

I don’t think this snippet works, I’ve not tested but, something like this:

import subprocess

tank_cmd = "/sg_toolkit/configs/my_config/tank"

p = subprocess.Popen([tank_cmd,"updates"], stdin=subprocess.PIPE, stdout=subprocess.PIPE)

# now communicate the 2 args
print(p.communicate(input="n\na"))
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Very good but it still requires some (potential) maintenance on the parsing side (if you guys change the stdout stuff and so on). But, nice to have options. Thanks, Philip!

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