how to write a file from an aspect?

[Gregg Reynolds]

I've got a very simple aspect that prints info from the target's providers. I'd like to write that to a file, but when I use ctx.actions.write I don't get any output.  This is running it from the command line.  The print statements show up in the DEBUG output, though.  The result looks like this:

INFO: Found 1 target...
Aspect @obazl_rules_ocaml//ocaml/_aspects:ocaml.bzl%providers_aspect of //src/lib/secrets:secrets up-to-date (nothing to build)

Am I using aspects incorrectly?

Thanks,

Gregg

[Daniel Wagner-Hall]

I believe you also need to add the file to an output group via the OutputGroupInfo, and request that output group on the command line. See https://docs.bazel.build/versions/master/skylark/rules.html#requesting-output-files for more information

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[Gregg Reynolds]

On Sun, Feb 28, 2021 at 5:28 AM Daniel Wagner-Hall <dawa...@gmail.com> wrote:

I believe you also need to add the file to an output group via the OutputGroupInfo, and request that output group on the command line. See https://docs.bazel.build/versions/master/skylark/rules.html#requesting-output-files for more information

Double thanks!  Not only does that solve my problem, but (re-re-)reading the related documentation on output attributes (a masterpiece of impenetrability) I realized they would solve a completely unrelated problem that has been a big problem.  So thank you thank you!