Re: Use regex in ~/.emacs.d/init.el to match no_proxy.

[Joost Kremers]

On Thu, Apr 08 2021, Hongyi Zhao wrote:
>> Eshell allows you to leave out the outermost parentheses, so instead
>> of [1] you can also write
>>
>> [2] regexp-opt "*.cn" "localhost" "10.0.0.0/8" "127.0.0.0/8" "172.16.0.0/12"
>> "192.168.0.0/16"
>
> Still failed, as shown below:
>
> ~ $ regexp-opt "*.cn" "localhost" "10.0.0.0/8" "127.0.0.0/8"
> "172.16.0.0/12" "192.168.0.0/16"
> Wrong number of arguments: (1 . 2), 6

regexp-opt takes a list of strings, so you'd need:

    regexp-opt ("*.cn" "localhost" "10.0.0.0/8" "127.0.0.0/8" "172.16.0.0/12" 
"192.168.0.0/16")

But that doesn't work because the parens are taken as a Lisp expression, so its
first element needs to be a function. Quoting it doen't work either:

    regexp-opt '("*.cn" "localhost" "10.0.0.0/8" "127.0.0.0/8" "172.16.0.0/12" 
"192.168.0.0/16")

Because then eshell is waiting for the closing single quote. So just add the
parens around the entire expression:

    (regexp-opt '("*.cn" "localhost" "10.0.0.0/8" "127.0.0.0/8" "172.16.0.0/12" 
"192.168.0.0/16"))

For Lisp interaction, I'd recommend `M-x ielm`, though.

HTH


-- 
Joost Kremers
Life has its moments