变量内的SED和特殊字符（Macos Monterey）
我是外壳脚本和终端使用情况的新手。 我在ZSH脚本中具有跟踪行，其中path_var始终是我必须插入的绝对文件夹路径：
#!/bin/zsh
...
read PATH_VAR
sed -i "" "s/\"PATH_VAR=.*\"/\"PATH_VAR=$PATH_VAR\"/" file.txt
...
这个想法是替换文本文件上的可变值我想替换为（“包括”）：
"PATH_VAR=/Path/to/folder"
我将变量设置为例如/path/to/folder;关注行弹出：
sed: line: "s/\"PATH_VAR=.*\"/\"P ...": bad flag in substitute command: 'P'
我知道这是由于/通过sed;实际上，当我运行时：
sed -i "" "s/\"PATH_VAR=.*\"/\"PATH_VAR=\/Path\/to\/folder\"/" file.txt
一切都会顺利进行，并且弦被更换。 我想知道是否有解决方法。由于path_var始终是绝对的路径，因此我考虑在path_var variable中发现的每个///condibal ofsive 。这是否可以使用sed？
I'm new to shell scripting and Terminal usage.
I have the follow line of code in a zsh script, where the PATH_VAR is always an absolute folder path that I have to insert:
#!/bin/zsh
...
read PATH_VAR
sed -i "" "s/\"PATH_VAR=.*\"/\"PATH_VAR=$PATH_VAR\"/" file.txt
...
The idea is to replace the variable value on a text file, where the string I want to replace is ("" included):
"PATH_VAR=/Path/to/folder"
I set the variable as, for example, /Path/to/folder; the follow line pops out:
sed: line: "s/\"PATH_VAR=.*\"/\"P ...": bad flag in substitute command: 'P'
I understand that this is due to the / that gets interpreted differently by sed; in fact when I run:
sed -i "" "s/\"PATH_VAR=.*\"/\"PATH_VAR=\/Path\/to\/folder\"/" file.txt
everything goes smoothly and the string gets replaced.
I want to know if there's a workaround. Since the PATH_VAR is always an absolute path, I thought about recoursively adding the \ before every / that is found in the PATH_VAR variable. Is this possible with sed?
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您可能需要为SED的
s命令选择另一个分隔符，而不是努力逃脱这些斜线。例如sed's@....@...@...@'或sed's＃...＃...＃'当然，这只有在您的图案/替换中没有出现时，才能有效。
Instead of struggling to escape those slashes, you may want to pick another separator for sed's
scommand. E.g.sed 's@....@...@'orsed 's#...#...#'But of course, this only works if the picked separator doesn't appear in your pattern/replacement.
没有人会记得
sed除s之外的命令。例如，它还具有cto c hange a匹配行：您的变量只需使用这种方法中没有任何新线。
Nobody ever remembers that
sedhas commands besidess. It also has, for example,cto change a matching line:Your variable just needs to not have any newlines in it with this approach.