# Spark
### Sparklines for Your Shell

Here's a graph of your productivity gains after using `spark`: ▁▂▃▅▇

## Installation

Simply run `make` and `sudo make install`. The `DESTDIR` controls prefix, which is `/usr/local` by default.

## Usage

Just run `spark` and pass it a space deliminated list of numbers. It's designed to be used in conjunction with other
scripts that can output in that format.

    $ spark 0 30 55 80 33 150
    ▁▂▄▅▃█

If no arguments are passed, it will read from stdin a set of numbers delimited by any character except 0 through 9, - (dash), . (period), e, and E.

    $ echo "7,6, 5, 4 3 2 1" | spark
    █▇▆▅▄▃▂

It's pretty resilient on the input it will take, which should make shell scripting with it easier:

    $ echo "12,1 6 8*3,1i5i2(4 % 7 =3" | spark
    █▂▅▆▃▂▄▂▃▅▃

Invoke help with `spark -h`.

## Examples

Magnitude of earthquakes over 1.0 in the last 24 hours:

    $ curl -s http://earthquake.usgs.gov/earthquakes/catalogs/eqs1day-M1.txt | cut -d, -f9 | spark
    ▁▂▂▂▁▂▁▁▁▂▁▄▁▂▂▂▃▁▂▂▂▃▃▂▂▂▂▁▁▁▁▁▂▁▂▆▃▂▂▂▂▁▅▂▂▂▆▂▁▂▂▂▂▁▁▂▃▂▃▁▁▁▁▅▂▃▂▄▁▃▁▂▁▂▁▅▁▁▂▅▁▂▁▂▁▁▁▂▁▁▁▁▁▁▃▁▂

Number of commits in a git repo per active day:

    $ git log --pretty=format:%ai --reverse | cut -d' ' -f1 | uniq -c | awk '{print $1}' | spark
    ▁▂▄▃▃▂▃▃▄▄▄▃▁▂▁▁▄▃█▃▂▂▅▄▄▃▂▄▃▇▄▂▄▁▁▂▅▂▂▁▂▁▂▂▄▅▃▂▃▂▂▂▂▄▂▂▁▄▂▁▂▂▃▂▂▂▁▂▂▂▄▂▃▃▆▅▂▂▄▅▃▁▂▁▁▂▁▂▂▄▁▁▂▃▂▂▄

Characters per line in spark.c:

    $ awk '{print length($0)}' spark.c | grep -Ev '^0$' | spark
    ▂▂▂▂▂▂▂▃▁█▆▆▂▁▂▂▃▃▂▂▄▂▂▂▁▃▃▃▂▃▂▁▂▂▂▂▂▂▄▂▂▂▁▂▂▂▇▂▂▂▂▂▁▂▂▃▂▅▂▃▂▁▁▃▃▃▃▃▂▁▂▁▁▃▂▂▃▃▂▂▇▁▂▂▂▁