On 2021-03-25, Gary Johnson wrote:
> On 2021-03-25, Christian Brabandt wrote:
> > On Mi, 24 Mär 2021, Ron Aaron wrote:
> >
> > > I want to get the vim version for a bash script. The way I'm trying to
> > > use is:
> > >
> > > vim --not-a-term --cmd 'echo v:versionlong|quit'
> > >
> > > However, that spews a bunch of ANSI terminal control stuff as well, which
> > > I don't want. Is there an option to suppress that output?
> >
> > Have you tried TERM=dumb vim --cmd 'echo v:versionlong|quit'?
>
> I did. It eliminated all but t_cm and added a ^M.
I think this is partly a bug in Vim. There are a few places in the
code where Vim assumes that it is running in a terminal as it
normally does and should output terminal control sequences without
regard to the presence of --not-a-term.
I have attached a patch that seems to fix that problem. If someone
would rather I submitted a PR, I can do that, too. Since this is
just a proposal at this point, the patch was just easier for me.
Even with the patch, though, I think using :echo to send something
to stdout is incorrect. The :echo command is intended to write to
the screen and does so under the control of Vim's screen management.
I think it would be a mistake to modify that code to have :echo
write to the screen or directly to stdout. I think a better
approach is to use echoraw() when you want to write directly to
stdout.
That would change your command to this:
vim --not-a-term --cmd 'call echoraw(v:versionlong)|quit'
If you want to put a newline on the end of that, use this:
vim --not-a-term --cmd 'call echoraw(v:versionlong."\n")|quit'
Of course, neither of those will do what you want without my patch
applied. We'll have to see if Bram et al. think that's a good idea.
Regards,
Gary
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diff --git a/src/main.c b/src/main.c
index 369741aba..4b992d141 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1531,7 +1531,8 @@ getout(int exitval)
#ifdef FEAT_GUI
if (!gui.in_use)
#endif
- windgoto((int)Rows - 1, 0);
+ if (!is_not_a_term())
+ windgoto((int)Rows - 1, 0);
#if defined(FEAT_EVAL) || defined(FEAT_SYN_HL)
// Optionally print hashtable efficiency.
@@ -1643,7 +1644,8 @@ getout(int exitval)
#ifdef FEAT_GUI
if (!gui.in_use)
#endif
- windgoto((int)Rows - 1, 0);
+ if (!is_not_a_term())
+ windgoto((int)Rows - 1, 0);
#ifdef FEAT_JOB_CHANNEL
job_stop_on_exit();
diff --git a/src/os_unix.c b/src/os_unix.c
index 1c8079917..62eb364a3 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -3343,7 +3343,7 @@ exit_scroll(void)
else
out_char('\n');
}
- else
+ else if (!is_not_a_term())
{
restore_cterm_colors(); // get original colors back
msg_clr_eos_force(); // clear the rest of the display
@@ -3371,8 +3371,11 @@ mch_exit(int r)
settmode(TMODE_COOK);
#ifdef FEAT_TITLE
// restore xterm title and icon name
- mch_restore_title(SAVE_RESTORE_BOTH);
- term_pop_title(SAVE_RESTORE_BOTH);
+ if (!is_not_a_term())
+ {
+ mch_restore_title(SAVE_RESTORE_BOTH);
+ term_pop_title(SAVE_RESTORE_BOTH);
+ }
#endif
/*
* When t_ti is not empty but it doesn't cause swapping terminal
