Oliver Weyhmueller
4ec771a1c7
* .gitconfig * .chezmoi.yaml.tmpl * .tmux.conf * .vim * .ssh * .p10k.zsh
89 lines
1.7 KiB
Bash
89 lines
1.7 KiB
Bash
#!/usr/bin/env bash
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#
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# spark
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# https://github.com/holman/spark
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#
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# Generates sparklines for a set of data.
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#
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# Here's a a good web-based sparkline generator that was a bit of inspiration
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# for spark:
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#
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# https://datacollective.org/sparkblocks
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#
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# spark takes a comma-separated list of data and then prints a sparkline out of
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# it.
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#
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# Examples:
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#
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# spark 1 5 22 13 53
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# # => ▁▁▃▂▇
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#
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# spark 0 30 55 80 33 150
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# # => ▁▂▃▅▂▇
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#
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# spark -h
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# # => Prints the spark help text.
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# Generates sparklines.
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#
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# $1 - The data we'd like to graph.
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spark()
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{
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local n numbers=
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# find min/max values
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local min=0xffffffff max=0
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for n in ${@//,/ }
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do
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# on Linux (or with bash4) we could use `printf %.0f $n` here to
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# round the number but that doesn't work on OS X (bash3) nor does
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# `awk '{printf "%.0f",$1}' <<< $n` work, so just cut it off
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n=${n%.*}
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(( n < min )) && min=$n
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(( n > max )) && max=$n
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numbers=$numbers${numbers:+ }$n
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done
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# print ticks
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local ticks=(▁ ▂ ▃ ▄ ▅ ▆ ▇ █)
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local f=$(( (($max-$min)<<8)/(${#ticks[@]}-1) ))
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(( f < 1 )) && f=1
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for n in $numbers
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do
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echo -n ${ticks[$(( ((($n-$min)<<8)/$f) ))]}
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done
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echo
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}
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# If we're being sourced, don't worry about such things
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if [ "$BASH_SOURCE" == "$0" ]; then
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# Prints the help text for spark.
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help()
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{
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cat <<EOF
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USAGE:
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spark [-h] VALUE,...
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EXAMPLES:
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spark 1 5 22 13 53
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▁▁▃▂█
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spark 0,30,55,80,33,150
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▁▂▃▄▂█
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echo 9 13 5 17 1 | spark
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▄▆▂█▁
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EOF
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}
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# show help for no arguments if stdin is a terminal
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if { [ -z "$1" ] && [ -t 0 ] ; } || [ "$1" == '-h' ]
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then
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help
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exit 0
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fi
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spark ${@:-`cat`}
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fi
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