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@Low-power

Low-power/logcat-color.sh

Last active May 3, 2020
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Fast, ash-compatible reimplementation of Anthony's logcat-color.sh
#!/bin/sh
# Colorize logcat(1) output
# Copyright 2015-2020 Rivoreo
# 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 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.
# This is a reimplementation of Anthony Lee's logcat-color.sh, which is a
# bash(1) script, available at https://github.com/M0xkLurk3r/logcat-color
#
# Unlike Anthony Lee's implementation, this implementation is compatible with
# Almquist shell (ash), Korn shell (ksh) and of course BASH; it is also 2
# times faster than Anthony Lee's implementation in most cases.
# Benchmark (Anthony's script is named logcat-color.bash in this test):
#
# $ time bash logcat-color.bash < ~/drop/android.log > /dev/null
#
# real 0m29.998s
# user 0m20.436s
# sys 0m9.424s
# $ time bash logcat-color.sh < ~/drop/android.log > /dev/null
#
# real 0m16.722s
# user 0m14.624s
# sys 0m2.088s
# $ time dash logcat-color.sh < ~/drop/android.log > /dev/null
#
# real 0m20.920s
# user 0m3.412s
# sys 0m17.500s
# $ time busybox ash logcat-color.sh < ~/drop/android.log > /dev/null
#
# real 0m23.596s
# user 0m4.436s
# sys 0m19.144s
# $ time ksh logcat-color.sh < ~/drop/android.log > /dev/null
#
# real 0m5.552s
# user 0m4.296s
# sys 0m1.248s
IFS=
while read -r line; do case "$line" in
----*)
printf '\033[7;37m%s\033[0m\n' "$line"
;;
*)
IFS=" "
set -- $line
if [ $# -lt 6 ]; then
printf '%s\n' "$line"
else
printf '\033[0;35m%s %s\033[0m ' "$1" "$2"
skip=0
len=${#3}
case $len in
0)
pad1=" "
;;
1)
pad1=" "
;;
2)
pad1=" "
;;
3)
pad1=" "
;;
4)
pad1=" "
;;
*)
pad1=
skip=$((len-5))
;;
esac
len=${#4}
case $len in
0)
pad2=" "
;;
1)
pad2=" "
;;
2)
pad2=" "
;;
3)
pad2=" "
;;
4)
pad2=" "
;;
*)
pad2=
skip=$((skip+(len-5)))
;;
esac
printf '%s\033[0;32m%s\033[0m %s\033[2;32m%s\033[0m ' "$pad1" "$3" "$pad2" "$4"
case "$5" in
F|E)
printf '\033[1;31m'
;;
W)
printf '\033[0;33m'
;;
D)
printf '\033[4;37m'
;;
A)
printf '\033[0;32m'
;;
esac
cut="???????????????????????????????"
while [ $skip -gt 0 ]; do
cut="?$cut"
skip=$((skip-1))
done
printf '%s\033[0m\n' "${line#$cut}"
fi
IFS=
;;
esac done
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