正则表达式用于排除一些与起始字符串匹配的子文件夹

Question

I am trying to set a regex pattern to allow parent folder with any characters(case insensitive) including special characters and exclude sub folder name whenever that match specific starting word with case insensitive.

I got temporary solution that excludes the sub folders, but in that regex i have to hard code all the sub folders that i want to exclude:

[a-zA-Z0-9\\-]\\/(?!(st1|str2|str3))

Here users able to create any name as parent folder including special characters:

its_MY-folder/foo
folder/bar

but need to restrict them whenever try to create a sub folder start with word "test" by ignoring case:

MY_Folder-name/test_name
MY_Folder/Test-name

Thanks in advance for your help.

Answer 1

The negative lookahead is only a placeholder, so you need to tell the regex parser what you want to match when there isn't the word test :

^.*\/(?!(test|Test))[^\/]+$

Here is that regex tested online

You can see that after the negative lookahead (the (?!(test|Test)) bit) I say I want any character that isn't a / and the end of line $ , this way I ensure I'm at the end of the path.

In my regex I match the whole string, from start to end, but you can remove the ^.* at the beginning.

The case insensitivity is usually a feature of the library you are using, so have a look on how to do it. For instance, if you use Linux and grep, you can do grep -i to be case insensitive.