CODEWITHSUNDEEP
vim
ricardo
ricardo

Reputation: 8435

Conditionally invoking autocmd by file location

In an .vimrc file, is it possible to only execute an autocmd if the file is loaded from a particular directory?

In MacVim, i have a line of code in my .vimrc which automatically cds to the directory that contains the file i am editing - however it causes an error when i access the git files that :Gedit creates (vim package fugitive).

The autocmd is:

autocmd BufEnter * execute "chdir ".escape(expand("%:p:h"), ' ')

The error is: 

Error detected while processing BufEnter Auto commands for "*":

From :echo expand("%") it is clear that Fugitive creates paths that begin with fugitive:///, so i am trying to figure out how to test if the first 12 characters of a file's path == fugitive:///

Upvotes: 4

Views: 1384

Answers (3)

Sanghyun Lee
Sanghyun Lee

Reputation: 23102

There's a ticket for this issue. 

autocm BufEnter * if expand('%:p') !~ '://' | :lchdir %:p:h | endif

This works well.

Upvotes: 1

ricardo
ricardo

Reputation: 8435

This can be achieved using the strpart function.

I ended up settling on the following:

if strpart(expand("%:p:h"), 0, 15) == "/Users/myputer/"
   autocmd BufEnter * execute "chdir ".escape(expand("%:p:h"), ' ')
endif

Which will only cd to a folder if it begins with /Users/myputer/

Upvotes: 1

romainl
romainl

Reputation: 196886

Hmm, I think I've misunderstood. Your are changing the directory in the shell, not in Vim, don't you? In that case, autochdir won't be enough.

:Gedit creates a temporary file with a funky name:

:e vimrc
:Gedit ~2
:echo expand("%")
fugitive:///home/romainl/.vim/.git//8aece3dc3c19522c33c997bc82a2487e3bdf013b/vimrc
:echo expand("%:p:h")
fugitive:///home/romainl/.vim/.git//8aece3dc3c19522c33c997bc82a2487e3bdf013b/

There's no way your shell is going to cd to that "directory" because it is not a valid path.

However, I have set autochdir which tells vim to cd automatically to the directory containing the current file. Thanks to that I can see that the temporary file is in:

:pwd
/tmp/vGiSmH2

I could use the output of :pwd to cd there.

Upvotes: 2

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