try cson https://github.com/bevry/cson

convert.sh

# cson to json
node_modules/cson/bin/cson2json data.cson 
{"abc":["a","b","c"],"a":{"b":"c"}}

node_modules/cson/bin/json2cson data.json 
{
  abc: [
    "a"
    "b"
    "c"
  ]
  a:
    b: "c"
}

cson.coffee

# Include CSON
CSON = require('cson')

# Parse a file path
result = CSON.parseFileSync('data.cson')  # sync
console.log result

cson.js

// Include CSON
CSON = require('cson');

// Parse a file path
result = CSON.parseFileSync('data.cson');  // sync
console.log(result);

data.cson

{
    # an array
    abc: [
        'a'
        'b'
        'c'
    ]

    # an object
    a:
        b: 'c'
}

package.json

{
  "name": "try-cson",
  "version": "0.0.1",
  "description": "",
  "dependencies": {
    "cson": "^1.4.5"
  }
}

parser.sh

# node
node cson.js 
{ abc: [ 'a', 'b', 'c' ], a: { b: 'c' } }

# coffee
 coffee cson.coffee 
{ abc: [ 'a', 'b', 'c' ], a: { b: 'c' } }