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os/shell: do_os_system(): Always show last chunk.

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This ameliorates use-cases like:
    :!cat foo.txt
    :make
where the user is interested in the last few lines of output.

Try these shell-based ex-commands before/after this commit:
    :grep -r '' *
    :make
    :!yes
    :!grep -r '' *
    :!git grep ''
    :!cat foo
    :!echo foo
    :!while true; do date; done
    :!for i in `seq 1 20000`; do echo XXXXXXXXXX $i; done

In all cases the last few lines of the command should always be shown,
regardless of where throttling was triggered.
This commit is contained in:
Justin M. Keyes
2016-10-07 13:18:24 +02:00
parent 97204e1cef
commit cb58999007
5 changed files with 141 additions and 82 deletions
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7
runtime/doc/vim_diff.txt
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@@ -155,10 +155,9 @@ are always available and may be used simultaneously in separate plugins. The
|system()| does not support writing/reading "backgrounded" commands. |E5677|
Nvim truncates ("throttles") shell-command messages echoed by |:!|, |:grep|,
and |:make|. No data is lost, this only affects display. This makes things
faster, but may seem weird for commands like ":!cat foo". Use ":te cat foo"
instead, |:terminal| output is never throttled.
Nvim may throttle (skip) messages from shell commands (|:!|, |:grep|, |:make|)
if there is too much output. No data is lost, this only affects display and
makes things faster. |:terminal| output is never throttled.
|mkdir()| behaviour changed:
1. Assuming /tmp/foo does not exist and /tmp can be written to