panic misusing --json-body argument

[davepacheco]

Trying to work around a bug in image import, I tried to create an image from a URL. I wasn't sure how to use it:

$ oxide image create
error: the following required arguments were not provided:
  --json-body <JSON-FILE>
  --description <description>
  --name <name>
  --os <os>
  --version <version>

In terms of the json-body, I thought I could guess my way there:

$ echo '{"source": { "url": "http://catacomb.eng.oxide.computer/media/cloud/debian-11-genericcloud-amd64.raw", block_size: 512 } }' | oxide image create --name my-image --description my-description --os debian --version 11 --json-body -
thread 'tokio-runtime-worker' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: "No such file or directory" }', cli/src/generated_cli.rs:5800:59
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: JoinError::Panic(Id(17), ...)', cli/src/main.rs:59:10

I guess it doesn't treat - as stdin and then panicked because it tried to open it and it wasn't there?