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Using the CLI, is it possible to tell if a given stack exists? Similarly, can I check if a given stack is currently "leased"?

I'm using pulumi to deploy instances of our app for PRs; I have a script that runs when the PR is first opened and on each update. In all cases I'm creating (or updating) a stack specific to that PR.

I'd like to know if a stack exists yet because I have to run `init` at least once. Right now, I run it everytime but trap the error in cases where the stack already exists.

You can run `pulumi stack` and check the output to see if any resources are allocated for it

Not sure that will  work when the stack doesn't exist. I  get a terminal prompt asking if I want to create the stack. I don't know the behavior when their isn't a tty (i.e., running in a CI environment).

I'd like to know if the stack is currently being updated because I'd like to bail out of the deployment script early if that's the case.

I don’t believe there are ways to do this in the `pulumi` CLI today, short of running a command and grepping for specific error messages / exit codes. (You can set an environment variable `TERM=dumb` , which will skip interactive prompts.)

But this is a good suggestion, as we’d like to better this type of scenario. Could you please file an issue on <http://github.com/pulumi/pulumi|github.com/pulumi/pulumi>? If we can’t think of a good UX for adding a command-line verb, at the very least we can probably add an endpoint to our REST API that you can script using `curl`.

Added as <https://github.com/pulumi/pulumi/issues/3535>