This teaches the reader fast-path to use self-insert-notfirst, allowing
it to handle spaces. This greatly increases the performance of paste by
reducing redraws.
Fixes#6603. Somewhat improves #6704
This adds basic support for self-insert-notfirst. When we see a
self-insert-nonempty char event, we kick it back to the outer loop,
which only inserts the character if the cursor is not at the beginning.
This adds a new readline command self-insert-notfirst, which is
analogous to self-insert, except that it does nothing if the cursor
is at the beginning. This will serve as a higher-performance implementation
for stripping leading spaces on paste.
Fixes#6138
Naturally this does not work for many other editors/aliases,
but it's still nice that we can make it work for some common
editors without requiring any configuration.
Of course this approach is not terribly flexible; but it's
alwyas possible to just wrap edit_command_buffer and set an
EDITOR that knows about the cursor position. It doesn't
feel important enough to add a configuration option.
Using a local variable means we have to expand it when loading the
completion. With this approach, the content of the variable will be
expanded, so escape it.
The default hg prompt is slow on large repositories (hg status takes
2-3 seconds on mozilla-central) which is unacceptable as a default.
Mimick our git prompt: by default, only show the current branch.
If the new variable $fish_prompt_hg_show_informative_status is set,
then use the old behavior.
[ci skip]
debounce_t will be used to limit thread creation from background highlighting
and autosuggestion scenarios. This is a one-element queue backed by a
single thread. New requests displace any existing queued request; this
reflects the fact that autosuggestions and highlighting only care about
the most recent result.
A timeout allows for abandoning hung threads, which may happen if you
attempt to e.g. access a dead hard-mounted NFS server. We don't want
this to defeat autosuggestions and highlighting permanently, so allow
spawning a new thread after the timeout (here 500 ms).
The problem is that under TSAN, the timing of signals becomes very weird and
exposes some real race conditions. We will need to re-design how signal
event handlers work.
bbc3fecbe introduced a regression where support for 256 color was not
detected on xterm-like terminals that did not define the TERM_PROGRAM
env variable. Almost no terminal on linux define this variable.
