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?


当前回答

还有一个专门处理ANSI转义序列的工具:ansifilter。使用默认的——text输出格式去除所有的ANSI转义序列(注意:不仅仅是着色)。

裁判:https://stackoverflow.com/a/6534712

其他回答

这对我来说很管用:

./somescript | cat

不确定./somescript中有什么,但如果转义序列没有硬编码,您可以设置终端类型来避免它们

TERM=dumb ./somescript 

例如,如果你尝试

TERM=dumb tput sgr0 | xxd

您将看到它在while时没有输出

tput sgr0 | xxd
00000000: 1b28 421b 5b6d                           .(B.[m

Does(对于xterm-256color)。

在纯Bash中更简单的函数从文本流中过滤出常见的ANSI代码:

# Strips common ANSI codes from a text stream

shopt -s extglob # Enable Bash Extended Globbing expressions
ansi_filter() {
  local line
  local IFS=
  while read -r line || [[ "$line" ]]; do
    printf '%s\n' "${line//$'\e'[\[(]*([0-9;])[@-n]/}"
  done
}

See:

扩展Globbing gnu.org: Bash参数扩展

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

Mac OSX或BSD使用

./somescript | sed $'s,\x1b\\[[0-9;]*[a-zA-Z],,g'