jipe

A bash utility to add JavaScript code to a pipe. Requires node.

Installation

1. Clone the repo: git clone https://github.com/drewhodson/jipe.git
2. Cd into the directory: cd jipe
3. Copy jipe to your bin directory: cp jipe ~/bin/

Usage

The stringified content of stdin is stored in a variable called _. Pass any JavaScript code as an argument to jipe.

echo 'hello world!' | jipe 'console.log(_.length)' # returns "13"

echo '{ "json": { "data": "hello!" } }' | jipe 'console.log(JSON.parse(_).json.data)' # returns "hello!"

Helper Functions and Scripts

To increase the terseness of scripts, the following aliases exist:

• console.log aliases: log, l
• process.stdout.write aliases: write, w
• Cast to string and print with newline: print, p
• Cast to string and print without newline: output, o
• Full contents of stdin: __
• Full contents of stdin without trailing newline: _n

Linewise Mode

For those of you familiar with AWK, or those who want a quick way to iterate over the lines of a file, use the flag -l or --linewise when invoking jipe to have the _ variable instead refer to each line of the file.

printf "hello\nworld\n.\n" | jipe -l 'p(_.length)' # returns 5\n5\n1\n

Testing

Unit tests written with bats.

Run tests with

bats test.bats

TODO

• Add man page

FAQ

• What if I don't want colors in my output?
  • Only console.log provides syntax highlighting, which is useful if you're printing JSON. However, use print or output to avoid color codes being printed.