Re: Using a File index

[weber]

On 9 fev, 14:31, Mathias Dahl <brakjol...@gmail.com> wrote:
> "weber" <hug...@gmail.com> writes:
> >> How was it solved?
>
> > With this code:
> > (defun indexed-find (file)
> >   (interactive "MFilename: ")
> >   (find-file "my_file_index.txt")
> >   (if (re-search-forward (concat file " = ") nil t 1)
> >      (progn
> >            (setq beg (point))
> >            (end-of-line)
> >            (setq end (point))
> >            (find-file (buffer-substring beg end)))
> >      (message "File not found!"))
> >   (kill-buffer "my_file_index.txt"))
>
> I had some free time and could not resist trying out some
> alternatives... :)
>
> Alternative 1:
>
> This is basically your code, just written a bit differently:
>
> (defun indexed-find-2 (file)
>   (interactive "MFilename: ")
>   (with-temp-buffer
>     (insert-file-contents "my_file_index.txt")
>     (if (search-forward-regexp (format "%s = \\(.*\\)" file) nil t)
>         (find-file (match-string 1))
>       (message "File not found!"))))
>
> You might want to use the full path or a variable in the file
> name above.
>
> Alternative 2:
>
> Another way to do what you want, using completion.
>
> (defun indexed-find-3 ()
>   (interactive)
>   (let* ((file-data
>          (with-temp-buffer
>            (insert-file-contents "my_file_index.txt")
>            (buffer-substring (point-min) (point-max))))
>          (rows (split-string file-data "\n"))
>          (file (completing-read "File: " rows)))
>     (if (string-match "\\(.*\\) = \\(.*\\)$" file)
>         (find-file (match-string 2 file))
>       (message "Could not find a file on that row"))))
>
> Or, same code, but a but harder to read maybe:
>
> (defun indexed-find-4 ()
>   (interactive)
>   (let ((file (completing-read
>                "File: "
>                (split-string
>                 (with-temp-buffer
>                   (insert-file-contents "my_file_index.txt")
>                   (buffer-substring (point-min) (point-max)))
>                 "\n"))))
>     (if (string-match "\\(.*\\) = \\(.*\\)$" file)
>         (find-file (match-string 2 file))
>       (message "Could not find a file on that row"))))
>
> > The index file was made with a ruby script, and I update it manually
> > when there are some new files...
>
> You might also want to have a look at using Emacs
> file-cache (http://www.emacswiki.org/cgi-bin/wiki/FileNameCache)
> or similar functionality.
>
> Happy hacking!

Oh, that functionality was already implemented! Why that doesn't
surprise me ? :)
Hey Mathias tks for the alternatives, I'll switch to one of those!!
Cheers,
weber