jjo

jjo is a small utility to create JSON objects that was inspired by jpmens/jo and skanehira/gjo.

I figured why not add a Javascript version for node.js as well.

How to install

npm install -g jjo

Usage

Usage: jjo [options] [items...]

a small utility to create JSON objects

Options:
  -V, --version  output the version number
  -a, --array    create a json array
  -h, --help     output usage information

Examples

Create Object

jjo number=123 float=123.12 string="this is a string" otherstring=foobar object={\"a\":true} array=[1,2,3] boolean=true

{
    "number": 123,
    "float": 123.12,
    "string": "this is a string",
    "otherstring": "foobar",
    "object": {
        "a": true
    },
    "array": [
        1,
        2,
        3
    ],
    "boolean": true
}

Create Array

jjo -a 123 "foo bar" {\"a\":123} false

[
    123,
    "foo bar",
    {
        "a": 123
    },
    false
]

Nesting

jjo somekey=false array=$(jjo -a *)

{
    "somekey": false,
    "array": [
        "dist",
        "jest.config.js",
        "LICENSE",
        "node_modules",
        "package.json",
        "package-lock.json",
        "README.md",
        "src",
        "tsconfig.json"
    ]
}

Reading from files

A value that starts with @ will be interpreted as plain text.

jjo test=@LICENSE

{
    "test": "MIT License\r\n\r\nCopyright (c) 2019 Daisuke Kato\r\n\r\nPermission is hereby granted, free of charge, to any person obtaining a copy\r\nof this software and associated documentation files (the \"Software\"), to deal\r\nin the Software without restriction, including without limitation the rights\r\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\r\ncopies of the Software, and to permit persons to whom the Software is\r\nfurnished to do so, subject to the following conditions:\r\n\r\nThe above copyright notice and this permission notice shall be included in all\r\ncopies or substantial portions of the Software.\r\n\r\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\r\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\r\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\r\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
FOR ANY CLAIM, DAMAGES OR OTHER\r\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\r\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE\r\nSOFTWARE."
}

A value that starts with : will be interpreted as JSON.

jjo test=:something.json

{
    "test": {
        "somekey": "somevalue",
        "anotherkey": 123
    }
}

To pass a string that begins with : or @ you can escape the outer quotes.

jjo special_string=\":bar\"

{
    "special_string": ":bar"
}

See also

• jo
• gjo
• rjo
• njo