问题:

我运行几个替换命令作为mavencolorize脚本的核心。 其中一个sed命令使用一个正则表达式,它可以在shell中找到,如下所述 可以在此处找到当前(不工作)的实现。

当我将该命令的一个变体包含到脚本中时,会出现不同的行为:

变式1:

$ sed -re "s/([a-zA-Z0-9./\\ :-]+)/\1/g"

适应脚本:

-re "s/WARNING: ([a-zA-Z0-9./\\ :-]+)/${warn}WARNING: \1${c_end}/g" \

错误: shell输出的信息与我输入$ sed信息相同。 奇怪!?


变式2:

$ sed -e "s/\([a-zA-Z0-9./\\ :-]\+\)/\1/g"

适应脚本:

-e "s/WARNING: \([a-zA-Z0-9./\\ :-]\+\)/${warn}WARNING: \1${c_end}/g" \

错误:

sed:-e表达式#7,char 59:`s’命令的RHS上的引用\\ 1无效

I run several substitution commands as the core of a colorize script for maven .One of the sed commands uses a regular expression which works find in the shell as discussed here .The current (not working) implementation can be found here .When I include one of the variants of the command into the script different behavior occurs:Variant 1:Adapted to the script:Error: The shell outputs the same information as if I would type $ sed .Strange!?Variant 2:Adapted to the script:Error:sed: -e expression #7, char 59: invalid reference \\1 on `s’ command’s RHS