Jspath-cli NPM

jspath-cli

A small CLI wrapper around JSPath. Support for working with stdin and file paths

Installation

npm install -g jspath-cli

Usage

With a file path:

jspath '.some.path' some-file.json

With stdin:

cat some-file.json | jspath '.some.path'

Options

Use -h or --help to show help output.
Use --version to display program version.
Use -p or --pretty to enable pretty printing of output.
Use -s or --strict to enable strict mode

Normal mode

To simplify usage in pipes results always try to be returned in it's most simplified form. This is done by not wrapping in unnecessary data structures and having singely matched strings printed unquoted.

matched type	output of single	output of multiple
Array	Array	Array of arrays' values
Object	Object	Array of objects
Boolean	Boolean	Array of booleans
Number	Number	Array of numbers
String	String unquoted	Array of strings
Mixed	N/A	Array of mixed

Strict mode

By enabling strict mode all results are returned as a valid JSON array of matches.

matched type	output of single	output of multiple
Array	Array	Array of arrays' values
Object	Array of one object	Array of objects
Boolean	Array of one boolean	Array of booleans
Number	Array of one number	Array of numbers
String	Array of one string unquoted	Array of strings
Mixed	N/A	Array of mixed

Examples

Simple

The example from JSPath:

$ echo '
    {
        "automobiles" : [
            { "maker" : "Nissan", "model" : "Teana", "year" : 2011 },
            { "maker" : "Honda", "model" : "Jazz", "year" : 2010 },
            { "maker" : "Honda", "model" : "Civic", "year" : 2007 },
            { "maker" : "Toyota", "model" : "Yaris", "year" : 2008 },
            { "maker" : "Honda", "model" : "Accord", "year" : 2011 }
        ],
        "motorcycles" : [{ "maker" : "Honda", "model" : "ST1300", "year" : 2012 }]
    }' | jspath '.automobiles{.maker === "Honda" && .year > 2009}.model'

['Jazz', 'Accord']

Realworld

JSPath can be used to quickly work with the AWS CLI:

aws ec2 describe-instances | jspath '
    .Reservations.Instances{
        .Tags.Key === "service" && .Tags.Value === "someservice"
    }.PublicIpAddress{
        . !== "1.2.3.4"
    }'