jparse.js

jparse is a command line tool for parsing JSON. It uses normal JavaScript syntax for accessing properties, and includes syntax highlighting.

Install

jparse uses pygments for syntax highlighting. On Ubuntu or other Debian based distros, run the following to install it:

apt-get install python-pygments

On OSX, you can use Python's easy_install program to install it:

easy_install pygments

Once pygments has been installed, use npm to install jparse:

npm install -g jparse

Usage

To parse JSON, just pipe JSON output from another command into jparse, then specify the properties to access as CLI parameters.

Example:

cat someFile.json | jparse foo.bar

You can also use JavaScript's bracket notation to access properties who's names are not valid JavaScript identifiers. Note that due to how Bash handles quotes inside parameters, when using this method you must surround your entire selection in quotes.

Example:

cat someFile.json | jparse "foo['another property']"

By default, jparse performs syntax highlighting. However, if the output of jparse is being piped into another program, this may cause the other program to fail when parsing the JSON's syntax. To prevent this, use the --nohighlight flag before your parameter list.

Example:

cat someFile.json | jparse --nohighlight foo.baz