Re: gvim --help

On 23/10/12 21:48, Marc Weber wrote:
> What magic is gvim doing to hide its documentation?
>
> I understand this:
> [marc@nixos:~]$ gvim --help 1> /tmp/file; ls -l /tmp/file
> 3326 (bytes in /tmp/file)
>
> I'd expect stdout to be printed to my console
> [marc@nixos:~]$ gvim --help 2> /tmp/file; ls -l /tmp/file
> 0 (bytes in /tmp/file)
>
> I'd expect stdout to be written to the file
> [marc@nixos:~]$ bash -c "(gvim --help) >/tmp/file 2>&1" ; ls -l /tmp/file
> 0 (bytes in /tmp/file)
>
> So why is gvim hiding its documentation when stderr is redirected to a
> file?
>
> Marc Weber
>

The following works for me when using gvim 7.3.712 with GTK2-GNOME GUI:

gvim --help
help appears in the terminal

gvim --help >gvimhelp.txt
help is written to gvimhelp.txt

gvim --help >gvimhelp1.txt 2>&1
help is written to gvimhelp1.txt

gvim --help |tee gvimhelp2.txt
help is written to gvimhelp2.txt

gvim --help 2>&1 |tee gvimhelp3.txt
help is written to gvimhelp3.txt

gvim --help 2>gvim.stderr.txt
help appears in the terminal
gvim.stderr.txt is created zero-length

gvim --help 1>gvimhelp4.txt 2>gvim.stderr2.txt
help (2236 bytes) appears in gvimhelp4.txt
gvim.stderr2.txt is created zero-length

(gvim --help) >gvimhelp5.txt 2>&1
help (2236 bytes) appears in gvimhelp5.txt

bash -c '(gvim --help) >gvimhelp6.txt 2>&1'
(with single quotes)
help appears in gvimhelp6.txt

bash -c "(gvim --help) >gvimhelp7.txt 2>&1"
(with double quotes)
help appears in gvimhelp7.txt

The fact that I look at the file afterwards is not the reason:

bash -c "(gvim --help) >gvimhelp8.txt 2>&1" ; ls -l gvimhelp8.txt
-rw-r--r-- 1 root root 2236 Oct 24 00:34 gvimhelp8.txt

However:
linux:~ # su -l tonymec
tonymec@linux:~> gvim --help >gvimhelp.txt; ls -l gvimhelp.txt
E233: cannot open displayVim: Warning: Output is not to a terminal

Press ENTER or type command to continue

(then nothing else appears, and keyboard stops being responsive, until I
hit Ctrl-Alt-F4 to log in as root to /dev/tty4 and kill gvim from there)

Writing viminfo file "/home/tonymec/.viminfo"
Terminated
-rw-r--r-- 1 tonymec ajm-user 11925 Oct 24 00:55 gvimhelp.txt

Inspection of this gvimhelp.txt shows that it contains one "vim screen"
(in colorscheme colours), the help (in konsole colours) then the bottom
of the Vim screen including a "wildmenu" but no statusline.

Which gvim flavour are you using? The first lines of :version in my gvim
(see ":help :redir" about how to capture them into @+ which is the
clipboard) are as follows:

VIM - Vi IMproved 7.3 (2010 Aug 15, compiled Oct 23 2012 05:40:32)
Included patches: 1-712
Compiled by antoine.mechelynck@gmail.com
Huge version with GTK2-GNOME GUI. Features included (+) or not (-):

(I pasted them all then edited away in the mailer what was not relevant
for this thread).

Oh, and BTW my "standard" shell is bash.


Best regards,
Tony.
--
"... After all, all he did was string together a lot of old, well-known
quotations."
-- H. L. Mencken, on Shakespeare

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