128 lines
3.2 KiB
Text
128 lines
3.2 KiB
Text
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#!/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 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 or space-separated list of data and then prints
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# a sparkline out of 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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_echo()
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{
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if [ "X$1" = "X-n" ]; then
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shift
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printf "%s" "$*"
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else
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printf "%s\n" "$*"
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fi
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}
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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:+ }$n
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done
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# print ticks
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local ticks=(▁ ▂ ▃ ▄ ▅ ▆ ▇ █)
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# use a high tick if data is constant
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(( min == max )) && ticks=(▅ ▆)
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local f=$(( (($max-$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" == "$0" ]; then
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# Prints the help text for spark.
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help()
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{
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local spark=$(basename $0)
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cat <<EOF
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USAGE:
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$spark [-h|--help] 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' ] || [ "$1" == '--help' ]
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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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# source: https://github.com/holman/spark/commit/ab88ac6f8f33698f39ece2f109b1117ef39a68eb
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# The MIT License
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#
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# Copyright (c) Zach Holman, https://zachholman.com
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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