nix/modules/home-manager/scripts/common/bin/spark

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2024-09-13 13:54:00 -05:00
#!/usr/bin/env bash
#
# spark
# https://github.com/holman/spark
#
# Generates sparklines for a set of data.
#
# Here's a good web-based sparkline generator that was a bit of inspiration
# for spark:
#
# https://datacollective.org/sparkblocks
#
# spark takes a comma-separated or space-separated list of data and then prints
# a sparkline out of it.
#
# Examples:
#
# spark 1 5 22 13 53
# # => ▁▁▃▂▇
#
# spark 0 30 55 80 33 150
# # => ▁▂▃▅▂▇
#
# spark -h
# # => Prints the spark help text.
# Generates sparklines.
#
# $1 - The data we'd like to graph.
_echo()
{
if [ "X$1" = "X-n" ]; then
shift
printf "%s" "$*"
else
printf "%s\n" "$*"
fi
}
spark()
{
local n numbers=
# find min/max values
local min=0xffffffff max=0
for n in ${@//,/ }
do
# on Linux (or with bash4) we could use `printf %.0f $n` here to
# round the number but that doesn't work on OS X (bash3) nor does
# `awk '{printf "%.0f",$1}' <<< $n` work, so just cut it off
n=${n%.*}
(( n < min )) && min=$n
(( n > max )) && max=$n
numbers=$numbers${numbers:+ }$n
done
# print ticks
local ticks=(▁ ▂ ▃ ▄ ▅ ▆ ▇ █)
# use a high tick if data is constant
(( min == max )) && ticks=(▅ ▆)
local f=$(( (($max-$min)<<8)/(${#ticks[@]}-1) ))
(( f < 1 )) && f=1
for n in $numbers
do
_echo -n ${ticks[$(( ((($n-$min)<<8)/$f) ))]}
done
_echo
}
# If we're being sourced, don't worry about such things
if [ "$BASH_SOURCE" == "$0" ]; then
# Prints the help text for spark.
help()
{
local spark=$(basename $0)
cat <<EOF
USAGE:
$spark [-h|--help] VALUE,...
EXAMPLES:
$spark 1 5 22 13 53
▁▁▃▂█
$spark 0,30,55,80,33,150
▁▂▃▄▂█
echo 9 13 5 17 1 | $spark
▄▆▂█▁
EOF
}
# show help for no arguments if stdin is a terminal
if { [ -z "$1" ] && [ -t 0 ] ; } || [ "$1" == '-h' ] || [ "$1" == '--help' ]
then
help
exit 0
fi
spark ${@:-`cat`}
fi
# source: https://github.com/holman/spark/commit/ab88ac6f8f33698f39ece2f109b1117ef39a68eb
# The MIT License
#
# Copyright (c) Zach Holman, https://zachholman.com
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.