jsonsmith

resolves a series of inputs to a single json value.

Usage:

cobble(options)

options has the following properties:

• inputs (required): a list of inputs where each element can be one of the following:

  • a string representing a file path -- jsonsmith will try to figure out the format if not provided explicitly
  • an object with properties path and format, where format can be one of json, yaml, and properties
  • an object with property raw that maps to a value in json, yaml, or .properties format

• varsObj: an optional object that will be used as the context for interpolation will be done and passed in as the last input

• debug: (line: string) => void: optional

Interpolation

• a value with syntax %{VARIABLE_NAME}% will be evaluated in the context of varsObj

File paths

• $read_text(path: string) will be interpreted as a file containing text.
• $read_json(path: string) will be interpreted as a file containing json.
• $read_yaml(path<string>) will be interpreted as a file containing yaml.

Examples

With file paths

import { cobble } from 'jsonsmith'

cobble({
  inputs: [
     'someDir/yaml1.yaml',
     'someDir/yaml2.yaml'
    ]
 });

This will do a deep extends with target being the first argument provided, and subsequent arguments as sources.

With raw inputs

import { cobble } from 'jsonsmith'

cobble({
  inputs: [
    {
      "raw": {
        "version": "0.5",
        "appName": "app"
      }
    },
    {
     "raw": "version=1.0"
    }
  ]
})

The above would result in the following object

{
  "appName": "app",
  "version": "1.0"
}

With interpolation

import { cobble } from 'jsonsmith'

cobble({
  inputs: [
    {
     "raw": "template=$read_json('templates/template.json')"
    },
    {
     "raw": "version=%{APP_VERSION}%"
    }
  ],
  varsObj: { APP_VERSION: "1.7" }
})

where templates/template.json looks like

{
  "name": "Scott Storch",
  "subject": "Mellow my man"
}

would result in the following object

{
  "template": {
    "name": "Scott Storch",
    "subject": "Mellow my man"
  },
  "version": "1.7"
}