Meaning empty variables, command substitutions that don't print
anything.
A switch without an argument
```fish
switch
case ...
end
```
is still a syntax error, and more than one argument is still a runtime
error.
The none-argument matches either an empty-string `case ''` or a
catch-all `case '*'`.
Fixes#5677.
Fixes#4943.
Previously when propagating explicitly separated output, we would early-out
if the buffer was empty, where empty meant contains no characters. However
it may contain one or more empty strings, in which case we should propagate
those strings.
Remove this footgun "empty" function and handle this properly.
Fixes#5987
Prior to this fix, fish would attempt to react if a local fish_complete_path
or fish_function_path were set. However this has never been very well tested
and will become impossible with concurrent execution. Always use the global
values.
Soon we will have more complicated logic around whether to call tcsetpgrp.
Prepare to centralize the logic by passing in the new term owner pgrp,
instead of having child_setup_process perform the decision.
This exitted if the cursor was at the end of the line as well (i.e. if
delete-char failed). That's a bit too eager.
Also documentation, which should have already been included.
We used to have a global notion of "is the shell interactive" but soon we
will want to have multiple independent execution threads, only some of
which may be interactive. Start tracking this data per-parser.
history now often writes to the history file asynchronously, but the history
test expects to find the text in the file immediately after running the
command. Hack a bit in history to make this test more reliable.
Prior to this diff, fish had different signal handling functions for
different signals. However it was hard to coordinate when a signal needed
to be the default handler, and when it was custom. In #5962 we overwrote
fish's custom WINCH handler with the default_handler when fish script asked
for WINCH to be handled.
Just have a single big signal handler function. That way it can never be
set to the wrong thing.
Fixes#5969
When executing a job, if the first process is fish internal, then have
fish claim the job's pgroup.
The idea here is that the terminal must be owned by a pgroup containing
the process reading from the terminal. If the first process is fish
internal (a function or builtin) then the pgroup must contain the fish
process.
This is a bit of a workaround of the behavior where the first process that
executes in a job becomes the process group leader. If there's a deferred
process, then we will execute processes out of order so the pgroup can be
wrong. Fix this by setting the process group leader explicitly as fish
when necessary.
Fixes#5855
Especially as, in this case, the documentation is quite massive.
Caught by porting string's test to littlecheck.
See #3404 - this was already supposed to be included.
This reverts commit 005e6f2ab8cf2dd9a2c7801d0bd02729a1535233.
This allows new text entry to take priority over highlighting, improving the
performance of pasting.
25afc9b377de5255673276314bf9d26a3b43cbab made this unnecessary by
having child processes wait for a signal after fork(), but this change
was later reverted. If we artificially slow down fish (e.g. with a sleep)
after the fork call, we see commands getting backgrounded by mistake.
Put back the tcsetgrp() call.
* Prevent not-yet-loaded functions from loaded when erased
Today, `functions --erase $function` does nothing if the function
hasn't been autoloaded yet.
E.g. run, in an interactive session
> functions --erase ls
> type ls
and be amazed that it still shows our default `ls --color=auto`
wrapper function.
This seems counter-intuitive - removing a function ought to remove it,
whether it had been executed before or not.
* doc/changelog
Instead of requiring a flag to enable newline trimming, invert it so the
flag (now `--no-trim-newlines`) disables newline trimming. This way our
default behavior matches that of sh's `"$(cmd)"`.
Also change newline trimming to trim all newlines instead of just one,
again to match sh's behavior.
The `string collect` subcommand behaves quite similarly in practice to
`string split0 -m 0` in that it doesn't split its output, but it also
takes an optional `--trim-newline` flag to trim a single trailing
newline off of the output.
See issue #159.
