env_scoped_t lives between environment_t and env_stack_t.
It represents the read-only logic of env_stack_t and will be used to back
the new environment snapshot implementation.
These tests used raw, unescaped parentheses to perform `test` logical
grouping, but the test failures weren't caught because the parser
evaluation errors were not being propagated (fixed in bdbd173e).
It was unconditionally returning `parse_execution_success`. This was
causing certain parser errors to incorrectly return after evaluation
with `$status` equal to `0`, as reported after `eval`, `source`, or
sub-`fish` execution.
Prior to this change, fish used a global flag to decide if we should check
for changes to universal variables. This flag was then checked at arbitrary
locations, potentially triggering variable updates and event handlers for
those updates; this was very hard to reason about.
Switch to triggering a universal variable update at a fixed location,
after running an external command. The common case is that the variable
file has not changed, which we can identify with just a stat() call, so
this is pretty cheap.
This reverts commit cdce8511a1.
This change was unsafe. The prior version (now restored) took the lock and
then copied the data. By returning a reference, the caller holds a
reference to data outside of the lock.
This function isn't worth optimizing. Hardly any functions use this
facility, and for those that do, they typically just capture one or two
variables.
* Convert `function_get_inherit_vars()` to return a reference to the
(possibly) existing map, rather than a copy;
* Preallocate and reuse a static (read-only) map for the (very) common
case of no inherited vars;
* Pass references to the inherit vars map around thereafter, never
triggering the map copy (or even move) constructor.
NB: If it turns out the reference is unsafe, we can switch the inherit vars
to be a shared_ptr and return that instead.
I did not realize builtins could safely call into the parser and inject
jobs during execution. This is much cleaner than hacking around the
required shape of a plain_statement.
- fix the carat position expanding e.g. `command $,`
- improve the error reporting for not-allowed command subtitutions
by figuring out where the expansion failed instead of using
SOURCE_LOCATION_UNKNOWN
- allow nullptr for parse_util_licate_brackets_range() out_string
argument if we don't need it to do any work.
Fixes#5812
`eval` has always been implemented as a function, which was always a bit
of a hack that caused some issues such as triggering the creation of a
new scope. This turns `eval` into a decorator.
The scoping issues with eval prevented it from being usable to actually
implement other shell components in fish script, such as the problems
described in #4442, which should now no longer be the case.
Closes#4443.
While `eval` is still a function, this paves the way for changing that
in the future, and lets the proc/exec functions detect when an eval is
used to allow/disallow certain behaviors and optimizations.
This adds an option --print-rusage-self to the fish executable. When set,
this option prints some getrusage stats to the console in a human-readable
way. This will be used by upcoming benchmarking support.
Followup to 394623b.
Doing it in the parser meant only top-level jobs would be reaped after
being `disown`ed, as subjobs aren't directly handled by the parser.
This is also much cleaner, as now job removal is centralized in
`process_clean_after_marking()`.
Closes#5803.
This prevents the `disown` builtin from directly removing jobs out of
the jobs list to prevent sanity issues, as `disown` may be called within
the context of a subjob (e.g. in a function or block) in which case the
parent job might not yet be done with the reference to the child job.
Instead, a flag is set and the parser removes the job from the list only
after the entire execution chain has completed.
Closes#5720.
When popping a scope from the environment stack, we currently do a lot of
nonsense like looking for changed curses variables. We want to centralize
this in env_stack_t so that it can be migrated to the env_dispatch logic.
Move this logic up one level in preparation for doing that.
This new file is supposed to encapsulate all of the logic around
reacting to variable changes, as opposed to the environment core.
This is to help break up the env.cpp monolith.
Prior to this fix, a job would only inherit a pgrp from its parent if the
first command were external. There seems to be no reason for this
restriction and this causes tcsetgrp() churn, potentially cuasing SIGTTIN.
Switch to unconditionally inheriting a pgrp from parents.
This should fix most of #5765, the only remaining question is
tcsetpgrp from builtins.
Prior to this fix, in every call to job_continue, fish would reclaim the
foreground pgrp. This would cause other jobs in the pipeline (which may
have another pgrp) to receive SIGTTIN / SIGTTOU.
Only reclaim the foreground pgrp if it was held at the point of job_continue.
This partially addresses #5765
In tests we would like to arrange for an executable to invoke certain
system calls, e.g. to claim or relinquish control of the terminal. This is
annoying to do portably via e.g. perl. fish_test_helper is a little
program where we can add custom commands to make it act in certain ways.
This set the term modes to the shell-modes, including disabling
ICRNL (translating \cm to \cj) and echo.
The rationale given was that `reader_interactive_init()` would only be
called >= 250ms later, which I _highly_ doubt considering fish's total
startup time is 8ms for me.
The main idea was that this would stop programs like tmuxinator that
send shortcuts early from failing _iff_ the shortcut was \cj, which
also seems quite unusual.
This works both with `rm -i` and `read` in config.fish, because `read`
explicitly calls `reader_push`, which then initializes the shell modes.
The real fix would involve reordering our init so we set up the
modesetting first, but that's quite involved and the remaining issue
should barely happen, while it's fairly common to have issues with a
prompt in config.fish, and the workaround for the former is simpler, so let's leave it for now.
Partially reverts #2578.
Fixes#2980.
Putting larger members before smaller ones will reduce structure
sizes. bools are 1 byte. on 64bit systems I think they reduced:
wgetopt.h:46: 64 to 56 bytes
builtin_history.cpp:30: 48 to 32 bytes
builtin_status.cpp:91: 32 to 24 bytes
tinyexpr.cpp:69: 40 to 32 bytes
The data stored in these containers is small enough that it is worth
creating distinct sets for each lookup.
In a microbenchmark of these changes, the single-lookup version of the
function with lookups gated on the length of input (bypassed entirely if
the input is longer than the longest key in the container) provided a
1.5x-3.5x speedup over the previous implementation.
Additionally, as the collections are static and their contents are never
modified after startup, it makes no sense to continously calculate the
location of and allocate an iterator for the `!= foo.end()` comparison;
the end iterator is now statically cached.
I'm not expecting massive speed gains out of this change, but the parser
does perform enough of these to make it worth optimizing in this way.
This reverts commit 7a74198aa3.
Believe it or not this commit actually increased copying. When accepting
a value you know you're going to take ownership of, just accept it by
value; then temporaries can invoke the move ctor and blah blah blah.
We really need a lightweight refcounted pass-by-value string to make this
less error prone.
If we switch the bind mode, we add a "force-repaint" there just to
redraw the mode indicator.
That's quite wasteful and annoying, considering that sometimes the prompt can take
half a second.
So we add a "repaint-mode" function that just reexecutes the
mode-prompt and uses the cached values for the others.
Fixes#5783.
As it turns out it didn't work much better, and it fell behind in
support when it comes to things that wcwidth traditionally can't
express like variation selectors and hangul combining characters, but
also simply $fish_*_width.
I've had to tell a few people now to rebuild with widecharwidth after
sending them on a fool's errand to set X variable.
So keeping this option is doing our users a disservice.
* Add "expand-abbr" bind function
This can be used to explictly allow expanding abbreviations.
* Make expanding abbr explicit
NOTE: This accepts them for space only, we currently also do it for \n
and \r.
* Remove now dead code
We no longer trigger an abbr implicitly, so we can remove the code
that does it.
* Fix comment
[ci skip]
Directly access the job list without the intermediate job_iterator_t,
and remove functions that are ripe for abuse by modifying a local
enumeration of the same list instead of operating on the iterators
directly (e.g. proc.cpp iterates jobs, and mid-iteration calls
parser::job_remove(j) with the job (and not the iterator to the job),
causing an invisible invalidation of the pre-existing local iterators.
This printed weird things like
```fish
$ functions -x
functions: Unknown option '-x'
(Type 'help functions' for related documentation)
```
Instead, let's make it
```fish
$ functions -x
functions: Unknown option '-x'
(Type 'help functions' for related documentation)
```
This was printed basically everywhere.
The user knows what they executed on standard input.
A good example:
```fish
set c (subme 513)
```
used to print
```
fish: Too much data emitted by command substitution so it was discarded
set -l x (string repeat -n $argv x)
^
in function 'subme'
called on standard input
with parameter list '513'
in command substitution
called on standard input
```
and now it is
```
fish: Too much data emitted by command substitution so it was discarded
set -l x (string repeat -n $argv x)
^
in function 'subme' with arguments '513'
in command substitution
```
See #5434.
Now:
```
cd: Unknown option '-r'
~/dev/fish-shell/share/functions/cd.fish (line 40):
builtin cd $argv
^
in function 'cd' with arguments '-r'
in function 'f'
in function 'd'
in function 'b' with arguments '-1q --wurst'
in function 'a'
called on standard input
```
See #5434.
This printed things like
```
in function 'f'
called on standard input
in function 'd'
called on standard input
in function 'b'
called on standard input
in function 'a'
called on standard input
```
As a first step, it removes the empty lines so it's now
```
in function 'f'
called on standard input
in function 'd'
called on standard input
in function 'b'
called on standard input
in function 'a'
called on standard input
```
See #5434.
This switches env_var_t to be an immutable value type, and stores its
contents via a shared_ptr. This eliminates string copying when fetching
env_var_t values.
If a function process is deferred, allow it to be unbuffered.
This permits certain simple cases where functions are piped to external
commands to execute without buffering.
This is a somewhat-hacky stopgap measure that can't really be extended
to more general concurrent processes. However it is overall an improvement
in user experience that might help flush out some bugs too.
