Write multiple files with tool script

[ataube]

Hi there,
I would like to create a tool script which iterates on a list of data and writes each entry as a dedicated json file to disk.
Something like this

command: dump: {
  for x in events {
    write: file.Create & {
      filename: "\(x.eventId).json"
      contents: json.Marshal(x)
    }
  }
}

Do you have an idea why it is not working? I'm getting the following error

command.dump.write.filename: conflicting values "4a714c16-6342-4a38-a0f0-d9c92648ee5d.json" and "afb37fa1-499f-4099-a10d-b59a061ff63b.json":
    ./events_tool.cue:16:3
    ./events_tool.cue:18:17

[ataube]

I just found this helpful issue and got it to work: cuelang/cue#67
Sorry for the noise

[verdverm]

As a quick reference, the main idea is that when you are generating a label: { ... } struct within a for loop (struct comprehension), the key needs to be unique, otherwise the structs created at each iteration unify together.

command: foo: {
  for key, val in listOrStruct {
    "write-\(key): file.Create & {    // <== note the interpolation here, this label needs to be unique
      filename: "\(val.name).json"
      contents: json.Marshal(val)
    }
  }
}

You could also omit the key above and use a field from val for constructing a unique key