我有一些脚本，产生输出的颜色，我需要删除ANSI代码。
#!/bin/bash
exec > >(tee log) # redirect the output to a file but keep it on stdout
exec 2>&1
./somescript
输出为(在日志文件中):
java (pid 12321) is running...@[60G[@[0;32m OK @[0;39m]
我不知道如何在这里放置ESC字符，所以我把@放在它的位置。
我把剧本改成:
#!/bin/bash
exec > >(tee log) # redirect the output to a file but keep it on stdout
exec 2>&1
./somescript | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g"
但是现在它给了我(在日志文件中):
java (pid 12321) is running...@[60G[ OK ]
我怎么也可以删除这个'@[60G?
也许有一种方法可以完全禁用整个脚本的着色?
这是一个纯Bash解决方案。
保存为strip-escape-codes.sh，使其可执行，然后执行<command- production - colour -output> | ./strip-escape-codes.sh。
注意，这将删除所有的ANSI转义码/序列。如果你只想去除颜色，用“m”替换[a-zA-Z]。
Bash >= 4.0:
#!/usr/bin/env bash
# Strip ANSI escape codes/sequences [$1: input string, $2: target variable]
function strip_escape_codes() {
local _input="$1" _i _char _escape=0
local -n _output="$2"; _output=""
for (( _i=0; _i < ${#_input}; _i++ )); do
_char="${_input:_i:1}"
if (( ${_escape} == 1 )); then
if [[ "${_char}" == [a-zA-Z] ]]; then
_escape=0
fi
continue
fi
if [[ "${_char}" == $'\e' ]]; then
_escape=1
continue
fi
_output+="${_char}"
done
}
while read -r line; do
strip_escape_codes "${line}" line_stripped
echo "${line_stripped}"
done
Bash < 4.0:
#!/usr/bin/env bash
# Strip ANSI escape codes/sequences [$1: input string, $2: target variable]
function strip_escape_codes() {
local input="${1//\"/\\\"}" output="" i char escape=0
for (( i=0; i < ${#input}; ++i )); do # process all characters of input string
char="${input:i:1}" # get current character from input string
if (( ${escape} == 1 )); then # if we're currently within an escape sequence, check if
if [[ "${char}" == [a-zA-Z] ]]; then # end is reached, i.e. if current character is a letter
escape=0 # end reached, we're no longer within an escape sequence
fi
continue # skip current character, i.e. do not add to ouput
fi
if [[ "${char}" == $'\e' ]]; then # if current character is '\e', we've reached the start
escape=1 # of an escape sequence -> set flag
continue # skip current character, i.e. do not add to ouput
fi
output+="${char}" # add current character to output
done
eval "$2=\"${output}\"" # assign output to target variable
}
while read -r line; do
strip_escape_codes "${line}" line_stripped
echo "${line_stripped}"
done
下面的正则表达式将错过一些ANSI转义码序列，以及3位颜色。regex101.com的示例和修复。
用这个代替:
./somescript | sed -r 's/\x1B\[(;?[0-9]{1,3})+[mGK]//g'
我也有问题，有时，SI字符出现。
例如，输入echo "$(tput setaf 1)foo$(tput sgr0) bar"
这里有一种方法也可以剥离SI字符(shift in) (0x0f)
./somescript | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[mGK]//g" | sed "s/\x0f//g"
