I am trying to append a variable at the last character of a specific line of a file from a bash script.
我试图在bash脚本中某个文件特定行的最后一个字符处附加一个变量。
The file is called myfile.txt and what I want to do is to append the contents of a variable named VERSION right after the last character of the line of the file that contains the unique string MYVERSION.
该文件称为myfile。txt和我想做的是在包含唯一字符串MYVERSION的文件行的最后一个字符后面追加一个名为VERSION的变量的内容。
That is, if in this line there is the following:
也就是说，如果这一行有以下内容:
MYVERSION=0.1
and VERSION="-custom_P1" then, I want to have the following:
而VERSION="-custom_P1"我想要的是:
MYVERSION=0.1-custom_P1
Thank you all for the help.
谢谢大家的帮助。
2 个解决方案
#1
3
Try this:
试试这个:
sed -i "/^MYVERSION=/ s/\$/$VERSION/" myfile.txt
The idea is that it finds a line that starts with MYVERSION= and then replaces the end of that line with the contents of the $VERSION environment variable.
其思想是找到以MYVERSION=开头的行，然后用$VERSION环境变量的内容替换行尾。
Edit: originally I wasn't sure if the first $ needed to be escaped, but @sehe's comment and its upvoters convinced me that it does.
编辑:起初我不确定是否需要转义，但是@sehe的评论和它的支持者说服了我。
#2
0
Try
试一试
sed -e "s/^MYVERSION=/MYVERSION=.*$/&${VERSION}/g" < myfile.txt
The command appends the value of VERSION to the line with 'MYVERSION='
该命令将VERSION值附加到带有'MYVERSION='的行中
#1
3
Try this:
试试这个:
sed -i "/^MYVERSION=/ s/\$/$VERSION/" myfile.txt
The idea is that it finds a line that starts with MYVERSION= and then replaces the end of that line with the contents of the $VERSION environment variable.
其思想是找到以MYVERSION=开头的行，然后用$VERSION环境变量的内容替换行尾。
Edit: originally I wasn't sure if the first $ needed to be escaped, but @sehe's comment and its upvoters convinced me that it does.
编辑:起初我不确定是否需要转义，但是@sehe的评论和它的支持者说服了我。
#2
0
Try
试一试
sed -e "s/^MYVERSION=/MYVERSION=.*$/&${VERSION}/g" < myfile.txt
The command appends the value of VERSION to the line with 'MYVERSION='
该命令将VERSION值附加到带有'MYVERSION='的行中