On 2021-12-10, バクダンくん wrote:
> Thank you for your comment!
>
> The reason for using :cd this way on Windows is that this is how cd
> works at the Command Prompt, so it is more natural for Windows
> users.
>
> That may be natural, but not useful. Also, Microsoft recently encourages to
> switch to PowerShell 7, in which cd (alias of Set-Location) command without an
> argument changes the working directory to the home directory.
I didn't know that. Thanks. I occasionally have to use Power
Shell, but not often.
> How about putting this in your vimrc instead. It avoids Yet Another
> Option.
>
> if has("win32")
> cabbrev <expr> cd ((getcmdtype() == ':' && getcmdpos() <= 3) ? 'Cd' :
> 'cd')
> command! -nargs=? -complete=file Cd if !empty(expand("<args>")) | cd
> <args> | else | cd $USERPROFILE | endif
> endif
>
> I have tried similar solution, but it has some problems:
>
> • I just don't want to define a command for this simple feature that Unix
> version already has. Using :Cd command is weird for me.
Agreed, but that's what the abbreviation is for. It changes :cd to
:Cd automatically so you can continue to type :cd.
> • Your method does not cover a feature that :cd echoes the new working
> directory. Somehow :cd<CR> echoes, but :Cd<CR> and :Cd Desktop do not. I
> want to keep this feature because it is helpful.
I don't care about that myself--it seems redundant--but I'm sure
that a command or function could be crafted to do that.
> To meet my wants, I need to write the next script in my vimrc, but it maps
> <CR>
> on command line mode so I expect some side effects.
>
> if has('win32')
> function! s:expand_alias() abort
> if getcmdtype() !=# ':'
> return "\<CR>"
> endif
> let cmdline = getcmdline()
> for [pattern, alias] in [
> \ ['^\s*[tl]\?cd\s*$', "$HOME\<CR>\<Cmd>pwd\<CR>"],
> \ ['^\s*[tl]\?cd\s', "\<CR>\<Cmd>pwd\<CR>"],
> \ ]
> if cmdline =~# pattern
> return alias
> endif
> endfor
> return "\<CR>"
> endfunction
> cnoremap <expr> <CR> <SID>expand_alias()
> endif
>
> The change of C code is smaller than this script, and would have less side
> effects.
I think you could get the behavior you want by modifying my :Cd
command to call a function that would :cd and :pwd as you have done
above. That would avoid mapping <CR> and should have no side
effects.
Your proposal isn't horrible, it's just one of those things that
could be done with a script and tuned to do exactly what you want
without having to worry about what other users want.
There's usually a trade-off between adding a feature in a script or
in C, and to avoid making Vim more difficult to maintain and to
understand, I usually prefer using a script.
On the other hand, if enough users would benefit from having :cd
behave according to your patch, that would be better than all those
users having to write or copy your script.
Regards,
Gary
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