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The yaml document from hell (ruudvanasseldonk.com)

submitted 4 days ago by [email protected] to c/programming

40 comments fedilink hide all child comments

A 10 minute read covering some YAML edge-cases that you should have in mind when writing complex YAML files

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[–] [email protected] 29 points 4 days ago (2 children)

Man, even knowing that YAML document was going to be laden with bullshit, I only spotted the unquoted version strings looking fishy.

I also really dislike how often YAML is abused to take keys as list items. Something like this, for example:

hosts:
  debian-vm:
    user: root
  database-server:
    user: sql

"debian-vm" and "database-server" are the hostname, and as such they are values. So, this should be written as:

hosts:
  - name: debian-vm
    user: root
  - name: database-server
    user: sql

And I'm not just nitpicking here. If we change the example a bit:

hosts:
  database:
    user: sql

...then suddenly, you don't know, if "database" is just one of many possible hosts or if all hosts always have a shared database with this technology.

[–] [email protected] 9 points 4 days ago

Recently introduced myself to OpenAPI/Swagger and it's chock full of this. It's painful.

[–] zero_spelled_with_an_ecks 5 points 4 days ago

I inherited ansible that always used maps instead of lists and it drove me up the wall. Still untangling that.