How to embed a literal json within a YAML using jsonnet?

Question

Here's what I'm trying to achieve using jsonnet:

version: "v1"
data:
  j.json: |-
    {
      "foo": "bar"
    }

Here's my failed attempt:

local j = {
  foo: "bar"
};

local wrapper = {
  version: "v1",
  data: {
    'j.json': |||
      j
    |||
  }
};

std.manifestYamlDoc(wrapper)

In my attempt I'm getting the following result:

"data":
  "j.json": |
    j
"version": "v1"

How can achieve a desired result?

Answer 1

Couple things there:

• the multiline string you build with the ||| expression is a literal, would need %<blah> format operator as any other string
• looks like you want std.manifestJson() there
• I'd rather take advantage of JSON being YAML and use jsonnet output, fwiw more legible:

foo.jsonnet:

local j = {
  foo: "bar"
};

local wrapper = {
  version: "v1",
  data: {
    'j.json': std.manifestJson(j)
  }
};

wrapper

jsonnet output:

$ jsonnet foo.jsonnet
{
   "data": {
      "j.json": "{\n    \"foo\": \"bar\"\n}"
   },
   "version": "v1"
}

verifying j.json field with jq

$ jsonnet foo.jsonnet | jq -r '.data["j.json"]' | jq
{
  "foo": "bar"
}