Support for multiple YAML documents / concatenated JSON

[sclevine]

Notes:

YAML:

a: 1
---
b: 2
---
c: 3

JSON:

{"a": 1}
{"b": 2}
{"c": 3}

(Also allowed: {"a": 1}{"b": 2}{"c": 3})

TOML and HCL should error.
Should we provide a flag to select a document by index?

[sclevine]

CC: @nebhale

[webwurst]

Until the feature is added here, the following alternative worked for me using the yq binary:

$ cat << EOF > ./example.yaml
a: 1
---
b: 2
---
c: 3
EOF

$ cat ./example.yaml | yq -o json | jq -c
{"a":1}
{"b":2}
{"c":3}

[jghiloni]

@sclevine i hit this today, thought i might look at it. could a second flag be provided to output as concatenated json or as json array?

[sclevine]

Hey @jghiloni, sounds reasonable to me, as long as the behavior without the extra flag is as described above.

Could also make sense to have it work more generically. The flag could mean "output multiple documents as a list" when converting from YAML to any other format. In the future, a different flag could do the inverse ("interpret a list a multiple documents").