▁▂▃▅▂▇ in your shell.
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sparklines for your shell

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


spark is a shell script, so drop it somewhere and make sure it's added to your $PATH. It's helpful if you have a super-neat collection of dotfiles, like mine.


Just run spark and pass it a comma-delimited 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

Invoke help with spark -h.

cooler usage

There's a lot of stuff you can do.

Number of commits to the github/github Git repository, by author:

› git shortlog -s |
      cut -f1 |
      tr "\n" ',' |
      sed 's/ //g' |

Magnitude of earthquakes over 1.0 in the last 24 hours:

› curl http://earthquake.usgs.gov/earthquakes/catalogs/eqs1day-M1.txt --silent | 
  sed '1d' |
  cut -d, -f9 |
  tr "\n" ',' |
  sed 's/ //g' |

Code visualization. The number of characters of spark itself, by line, ignoring empty lines:

› awk '{ print length($0) }' spark |
  grep -Ev 0 |
  tr "\n" ',' |

Since it's just a shell script, you could pop it in your prompt, too:

ruby-1.8.7-p334 in spark/ on master with history: ▂▅▇▂

wicked cool usage

Sounds like a wiki is a great place to collect all of your wicked cool usage for spark.


  • Speedup. It's a little more sluggish than it should be since we're doing a few unnecessary loops.
  • I'd like to constrain character widths with a -w switch.

▇▁ ⟦⟧ ▇▁

This is a @holman joint.