在shell脚本中使用sed替代项不起作用 [英] use of sed substitute in shell script doesn't work

问题描述

我制作了一个安装脚本，该脚本基本上在外壳脚本中使用 sed 在 RewriteEngine On 行之后插入了 RewriteRule >

I have made an install script which basically inserts some RewriteRule right after RewriteEngine On line by using sed inside a shell script

#!/bin/bash

REWRITE_RULE="RewriteRule \^catalog\/category\/view\/id\/([0-9]+)$ http:\/\/localhost\/app\/#?c=$1 [NE,L,R=301]"
FILE_PATH=".htaccess"

sed -i "s/RewriteEngine on/RewriteEngine on\n\n$REWRITE_RULE/g" $FILE_PATH

它什么都不做，但会给出类似的错误

it does nothing but gives some error like

:没有这样的文件或目录

: No such file or directory

我在shell中尝试了相同的命令，但没有任何问题，并更新了我的 .htaccess 文件

I tried same commands in shell and it worked without any issues and updated my .htaccess file

我是shell脚本的新手，所以不知道通过shell和脚本使用相同命令的区别.请指导

I am new to shell scripting so don't know the difference of using same command through shell and through script.. please guide

推荐答案

您会发现您的脚本包含回车符，这是因为它是用DOS行尾字符保存的.使用 tr -d'\ r'< brokenscript> fixedscript 修复脚本.

You'll find that your script contains carriage returns due to being saved with DOS end-of-line characters. Use tr -d '\r' <brokenscript >fixedscript to fix your script.

以下是该会话的副本，该会话已复制并解决了该问题:

Here's a copy of a session with the problem reproduced and fixed:

$ cat file
var=foo

$ cat myscript
sed -i s/foo/bar/ file

$ bash myscript
: No such file or directory

$ shellcheck myscript

In myscript line 1:
sed -i s/foo/bar/ file
                      ^-- SC1017: Literal carriage return. Run script through tr -d '\r' .

$ tr -d '\r' < myscript > fixedscript

$ bash fixedscript

$ cat file
var=bar

$ 

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