jpro

jpro is a JSON processor that can be written in a JavaScript code piece.

Demo

You can immediately run the following command, if you have node.js installed

$ echo '{"name":"bob","like":["sushi","orange"]}' | npx jpro '.like'
[
 "sushi",
 "orange"
]

Or you can install it and run it without npx. This will be faster to execute.

# Install jpro to your computer
npm install -g jpro

# Run
$ echo '{"name":"bob","like":["sushi","orange"]}' | npx jpro '.like'
[
 "sushi",
 "orange"
]

Usage

jpro is a JSON processor that can be written in a JavaScript code piece. The command line argument code piece is interpreted as follows.

eval("output = input " + <A CODE PIECE WITH COMMAND LINE ARGUMENT>)

The following variables are available in the code piece.

• input ... JavaScript object input as JSON from STDIN
• output ... JavaScript object output as JSON to STDOUT
• stdin ... String input from STDIN
• stdout ... String output to STDOUT (Preferred over output, if not null or undefined)

Examples

Examples of execution is shown below.

$ echo '{"name":"bob","like":["sushi","orange"]}' | npx jpro '.like'
[
 "sushi",
 "orange"
]

$ echo '{"name":"bob","like":["sushi","orange"]}' | npx jpro '&& Object.keys(input)'
[
 "name",
 "like"
]

$ echo '{"name":"bob","like":["sushi","orange"]}' | npx jpro '; stdout = input.like.join("&")'
sushi&orange

$ echo 'hello, world' | npx jpro ';stdout = stdin.toUpperCase()'
Warning: failed to parse JSON from STDIN
HELLO, WORLD

$ echo 'hello, world' | JPRO_SILENT=true npx jpro ';stdout = stdin.toUpperCase()'
HELLO, WORLD

License

MIT

Author

yammerjp