Commit Graph

5050 Commits

Author SHA1 Message Date
Fabian Boehm
6be6890fa3 Remove config.h
We don't actually use anything in there anymore.

We keep the WCHAR_T_BITS define in cmake because that's
used to find pcre2.
2024-01-20 08:56:29 +01:00
ridiculousfish
9747ab19d1 Eliminate UVAR_FILE_SET_MTIME_HACK checks
This was previously limited to Linux predicated on the existence
of certain headers, but Rust just exposes those functions unconditionally. So
remove the check and just perform the mtime hack on Linux and Android.
2024-01-19 09:33:33 -08:00
ridiculousfish
70ed4806b4 Use libc O_EXLOCK instead of our own
Rust libc supports O_EXLOCK on supported platforms (BSD/macOS), use that instead
of re-exposing it.
2024-01-19 09:33:33 -08:00
Johannes Altmanninger
7597288c18 test_error_messages: add back missing validation
Make sure to also look for the error part that occurs after the last format
specifier.

Still not great because it won't fail if there's unexpected output at the
beginning or end of the string.
2024-01-19 06:26:31 +01:00
Johannes Altmanninger
800f2414fb Fix regression in split_string_tok()
If there's no more separator we break early but dont update pos, so we go
into the code path that asserts we have reached the limit.
2024-01-18 10:24:40 +01:00
Johannes Altmanninger
fff8e8163b Control-C to simply clear commandline buffer again
Commit 5f849d0 changed control-C to print an inverted ^C and then a newline.

The original motivation was

> In bash if you type something and press ctrl-c then the content of the line
> is preserved and the cursor is moved to a new line. In fish the ctrl-c just
> clears the line. For me the behaviour of bash is a bit better, because it
> allows me to type something then press ctrl-c and I have the typed string
> in the log for further reference.

This sounds like a valid use case in some scenarios but I think that most
abandoned commands are noise. After all, the user erased them. Also, now that
we have undo that can be used to get back a limited set of canceled commands.

I believe the original motivation for existing behavior (in other shells) was
that TERM=dumb does not support erasing characters. Similarly, other shells
like to leave behind other artifacts, for example when using tab-completion
or in their interactive menus but we generally don't.

Control-C is the obvious way to quickly clear a multi-line commandline.
IPython does the same. For the other behavior we have Alt-# although that's
probably not very well-known.

Restore the old Control-C behavior of simply clearing the command line.

Our unused __fish_cancel_commandline still prints the ^C. For folks who
have explicitly bound ^C to that, it's probably better to keep the existing
behavior, so let's leave this one.

Previous attempt at #4713 fizzled.

Closes #10213
2024-01-17 19:54:57 +01:00
Fabian Boehm
34c09b1816 reader: Fix infinite loop for up/downcase bindings
This could *probably* be rewritten nicer with a for-loop

Fixes #10222
2024-01-16 18:13:18 +01:00
Fabian Boehm
5d3aea363e Fix PagerAndSearch not focusing the search field
Boolean confusion

Fixes #10220
2024-01-16 16:39:05 +01:00
ridiculousfish
9bd4b3f878 Adopt count_newlines in additional places 2024-01-14 10:04:55 -08:00
ridiculousfish
4ea222cd34 Improve codegen of line_offset_of_character_at_offset
This function is a hotspot, but it has inefficient codegen:

1. For whatever reason, the chars() iterator of wstr is slower
   than that of a slice. Use the slice.

2. Unnecessary overflow checks were preventing vectorization.

Switch to a more optimized implementation.

This improves aliases benchmark time by about 9%.
2024-01-14 10:04:37 -08:00
Johannes Altmanninger
e8ebeedfca Don't assume libc::c_char is signed
Fixes #10214
2024-01-14 17:12:02 +01:00
Johannes Altmanninger
68d1207d53 Rename flag that fails expansions with command substitutions
SKIP_CMDSUBST does not pass through command substitutions, unlike
SKIP_VARIABLES and SKIP_WILDCARDS.
2024-01-14 13:19:38 +01:00
Johannes Altmanninger
126036c980 Silence a dead code warning
This is still used in commented-out code.
2024-01-14 13:17:59 +01:00
ridiculousfish
0f56db55a2 Correct "fire_exit" event back to "fish_exit"
This was causing fish_exit to not fire, which caused (among other things)
leaking tmux processes from the tests.

This was bisected to eacbd6156d
2024-01-13 15:20:59 -08:00
Mahmoud Al-Qudsi
33f33c5f41 Simplify (and fix?) build.rs HAVE_XXX detection
Since none of the compiles(xxx) calls are to particularly complex code, we can
just use `rsconf` directly to test for the presence of the symbols or headers as
needed.

Note that it seems at least some of the previous detection was not working
correctly; in particular HAVE_PIPE2 was evaluating to false on my WSL install
where pipe2(2) was available (caught because it revealed some compilation errors
in that conditional compilation path after porting).

I kept the cfg names and the tests themselves mostly as-is, though we might want
to change that to conform with the rust convention of lowercase cfg names and
decide whether we want to prefix all these with have_, fish_, or nothing at all.
Also the posix_spawn() test should probably check for the symbol `posix_spawn()`
rather than the header `spawn.h` since we don't use it via the header but rather
via the symbol (but in reality they're almost certainly going to give the same
result).
2024-01-13 15:45:42 -06:00
Mahmoud Al-Qudsi
e02c572738 Fix build error when HAVE_PIPE2 is true
NB: I only encountered this when rewriting the cfg detection, which means that
the previous detection wasn't correct since I have pipe2 on Linux but didn't run
into this build error before.
2024-01-13 15:44:03 -06:00
Mahmoud Al-Qudsi
6e002b6d80 Use cfg directly instead of going through features
Features should be for user-specifiable build configurations but our dynamic,
target-based conditional compilation is something else.
2024-01-13 15:16:47 -06:00
ridiculousfish
8554eb5f80 Further cleanup of FdMonitor 2024-01-13 12:51:36 -08:00
ridiculousfish
d8da79717e Remove some FFI bits from FdMonitor 2024-01-13 12:51:36 -08:00
Mahmoud Al-Qudsi
30f70f02de Feature-detect localeconv_l() presence 2024-01-13 14:21:14 -06:00
Mahmoud Al-Qudsi
195852b562 Use locale::LOCALE_LOCK for all setlocale() calls
I had originally created a safe `set_locale()` wrapper and clippy-disallowed
`libc::setlocale()` but almost all our uses of `libc::setlocale()` are in a loop
where it makes much more sense to just obtain the lock outright then call
`setlocale()` repeatedly rather than lock it in the wrapper function each time.
2024-01-13 13:50:31 -06:00
Mahmoud Al-Qudsi
a138d74688 Fix unused code warning on cannot-be-WSL platforms
No need to use cfg_attr and have to worry about syncing the preconditions for
the cfg_attr with the preconditions for where `slice_contains_slice()` is used
in the codebase, just mark it as `allow(unused)` with a comment.
2024-01-13 13:15:31 -06:00
Fabian Boehm
0a92d03498 Remove L! from sprintf calls
Remove unnecessary L!
2024-01-13 08:52:54 +01:00
Fabian Boehm
fae780d666 clippy
There are a bunch more now that widestrs is gone
2024-01-13 08:52:54 +01:00
Fabian Boehm
09cd7c7ad9 Remove widestring-suffix uses
This removes both the `#[widestrs]` annotation as well as all `"foo"L`
suffixes, and does a `cargo fmt` run on the result
2024-01-13 08:52:54 +01:00
David Adam
ca972f6e0f fix permissions on source file 2024-01-13 11:12:02 +08:00
David Adam
5e8a7fb862 Drop unused C++ fishlib 2024-01-13 11:12:02 +08:00
Johannes Altmanninger
3ae20bdba0 Move fish-rust to project root 2024-01-13 03:58:33 +01:00
David Adam
1683e720a8 Use Rust for executables
Use Rust for executables

Drops the C++ entry points and restructures the Rust package into a
library and three binary crates.

Renames the fish-rust package to fish.

At least on Ubuntu, "fish_indent" is built before "fish".
Make sure export CURSES_LIBRARY_LIST to all binaries to make sure
that "cached-curses-libnames" is populated.

Closes #10198
2024-01-13 03:07:29 +01:00
Johannes Altmanninger
29bd6eebd0 Remove cxx and autocxx
Notably this gets rid of the Cargo target directory inside build directories,
in favor of "target/" at workspace root.
2024-01-07 22:19:56 +01:00
Johannes Altmanninger
102ab2c90d Remove FFI code and C++ files
There's a lot more to remove, like
- cxx/autocxx
- now-unused CMake code
- C++ pcre
- C++ entry points
- remaining mentions of "ffi"
2024-01-07 12:12:09 +01:00
Johannes Altmanninger
ab98566c67 Remove fish_tests
The remaining tests are all obsolete or already ported.
2024-01-07 12:12:09 +01:00
Johannes Altmanninger
77550a2f0d Turn FFI tests into native Rust tests
Keep running tests serially to avoid breaking assumptions.

I think many of these tests can run in parallel and/or don't need test_init().
Use the safe variant everywhere, to get it done faster.
2024-01-07 12:12:09 +01:00
Johannes Altmanninger
c758765503 Port shell_modes
The C++ one is still there but it's only used in dead code.
2024-01-07 12:12:09 +01:00
Johannes Altmanninger
7f110ed4c0 Port fish_key_reader 2024-01-07 00:54:22 +01:00
Johannes Altmanninger
55fd43d86c Port reader 2024-01-07 00:54:22 +01:00
Fabian Boehm
5a77db8353 fish_key_reader: Only name keys if they match the entire sequence
This would misname `\e\x7F` as "backspace":

bind -k backspace 'do something'
bind \e\x7F 'do something'

because it would check if there was any key *in there*.

This was probably meant for continuous mode, but it simply doesn't
work right. It's preferable to not give a key when one would work over
giving one when it's not correct.
2024-01-02 17:27:20 +01:00
David Adam
365027d55d drop obsolete headers 2024-01-02 01:59:02 +08:00
David Adam
3cdca4738a drop unused wildcard module
Some of the definitions in wildcard.h are still used in C++.
2024-01-02 01:59:02 +08:00
David Adam
118dfe776a drop unused path functions 2024-01-02 01:59:02 +08:00
ridiculousfish
8190e3419d Add remaining input FFI bits and port builtin_bind
This implements input and input_common FFI pieces in input_ffi.rs, and
simultaneously ports bind.rs. This was done as a single commit because
builtin_bind would have required a substantial amount of work to use the input
ffi.
2023-12-31 17:17:43 -08:00
ridiculousfish
7ffb62d1d9 Port input.cpp to input.rs
This is not yet adopted.
2023-12-31 15:45:08 -08:00
David Adam
413ba192a0 drop unused code:
fish_tests.cpp:
* comma_join

env.cpp:
* env_get_inherited
* env_get_runtime_path
* check_runtime_path (from tmux)
2023-12-31 21:14:40 +08:00
Shou Ya
b44bdea230 Enable globbing in history-pager
The existing subsequence search commonly returns false positives.
Support globs, to allow searching for disconnected substrings in a better way.

Closes #10143
Closes #10131
2023-12-24 09:08:03 +01:00
Shou Ya
31d157f117 Disable redundant filtering in history pager
Part of #10143
2023-12-24 08:42:20 +01:00
Johannes Altmanninger
2358d4dec8 Fix MoveWordStyle naming convention 2023-12-24 08:42:20 +01:00
Johannes Altmanninger
e194f35a5e Port test_word_motion 2023-12-22 18:10:29 +01:00
Johannes Altmanninger
afe9013b4c Port test_pthread 2023-12-22 18:10:29 +01:00
Johannes Altmanninger
9b1acd5260 Fix regression not ignoring fish_trace when writing title 2023-12-17 17:12:13 +01:00
Johannes Altmanninger
38d52b7835 Port perf_convert_ascii
The "#[bench]" attribute is not allowed in stable Rust, so keep it behind
a new feature flag. Run on nightly Rust with

    $ cargo bench --features=bechmark
    test tests::encoding::bench::bench_convert_ascii ... bench:     125,988 ns/iter (+/- 1,128) = 1040 MB/s
2023-12-10 14:35:43 +01:00
Johannes Altmanninger
f3dd8d306f Port make_autoclose_pipes, fd_event_signaller_t
This allows to get rid of the C++ autoclose_fd_t.
2023-12-10 14:35:43 +01:00
Johannes Altmanninger
f2cd916f65 Remove unused io_data_t structs 2023-12-10 14:35:43 +01:00
Fabian Boehm
eb196c8330 Encode all ENCODE_DIRECT codepoints with encode_direct
forward-port of 09986f5563
2023-12-10 09:29:42 +01:00
Johannes Altmanninger
e380654fff Port test_convert_nulls 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
a31ef0aeaa Delete test_wcstod
This seems to be ported already.
2023-12-09 21:35:08 +01:00
Johannes Altmanninger
a55e95f5fb Port test_env_snapshot 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
fe19cbded0 Port test_wwrite_to_fd 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
d5ccbb6e9c Port test_error_messages 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
f3d1e0d63a Port test_new_parser_errors 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
a7791aab4d Port test_new_parser_ad_hoc 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
d5cfa0e346 Port test_new_parser_ll2 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
af4b8ccc91 Port test_new_parser_fuzzing 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
afddb5dd3e Port test_new_parser_correctness 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
3fab9adab6 Port test_illegal_command_exit_code 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
c74cc71e26 Port rest of test_parser
Most of this is already ported into the "test_parser" test.
2023-12-09 21:35:08 +01:00
Johannes Altmanninger
09b7f3892f Port test_pipes 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
9430d5c542 Port test_wgetopt 2023-12-09 21:35:08 +01:00
Johannes Altmanninger
44a9a873af lru tests don't need porting since we'll drop our implementation 2023-12-09 16:55:20 +01:00
Johannes Altmanninger
749e760cf5 Port debounce tests 2023-12-09 16:48:02 +01:00
Johannes Altmanninger
b28521c3d5 Port fish_indent 2023-12-06 09:59:16 +01:00
Thomas Queiroz
a64324421f Port builtin ulimit
Closes #10121
2023-12-03 11:39:15 +01:00
Johannes Altmanninger
43e2d7b48c Port pager.cpp 2023-12-03 11:02:04 +01:00
Johannes Altmanninger
fadf0f2e5b Port editable_line_t 2023-12-02 20:04:07 +01:00
Johannes Altmanninger
31ad182aa5 Port screen.cpp 2023-12-01 11:59:33 +01:00
ridiculousfish
9b54e243b1 Add FFI bindings to universal notifiers and adopt in input_common
This removes the C++ bits for universal notifiers.
2023-11-26 17:29:53 -08:00
ridiculousfish
0f29e0de2f Remove extract_most_significant_digit
This is now unused.
2023-11-26 17:23:37 -08:00
David Adam
f2f41c6eec drop unused functions and configure checks
Remove the following C++ functions/methods, which have no callers:

common.cpp:
- read_loop
- narrow_string_safe
- escape_string_for_double_quotes
- read_unquoted_escape
- format_size
- format_size_safe
- valid_func_name
- get_executable_path

env.cpp:
- env_stack_t::set_empty
- env_stack_t::set_argv

fallback.cpp:
- fish_mkstemp_cloexec
- flock

proc_util.cpp:
- parse_util_slice_length
- parse_util_argument_is_help

path.cpp:
- path_get_path
- path_as_implicit_cd
- path_apply_working_directory
- path_emit_config_directory_messages
- path_get_data_remoteness
- path_get_config_remoteness
- path_is_valid
- paths_are_same_file

wcstringutil.cpp:
- split_string_tok

wutil.cpp:
- wgetcwd
- wunlink
- wrealpath
- wrename
- file_id_for_path
- fish_wcstoull

Also drop unused configure checks/defines:
- HAVE_FLOCK
2023-11-26 22:35:51 +08:00
ridiculousfish
c1e4a447fd Remove C++ UTF-8 bits
These are no longer used.
2023-11-18 19:21:25 -08:00
ridiculousfish
377ef9786e Remove null_terminated_array C++ bits
These are now unused.
2023-11-18 10:28:52 -08:00
Johannes Altmanninger
7f67588e63 fish_tests: label tests to indicate if they need porting 2023-11-15 11:09:48 +01:00
Johannes Altmanninger
6569943cb8 Port builtin read 2023-11-15 11:09:48 +01:00
Johannes Altmanninger
77aeb6a2a8 Port execution
Drop support for history file version 1.

ParseExecutionContext no longer contains an OperationContext because in my
first implementation, ParseExecutionContext didn't have interior mutability.
We should probably try to add it back.

Add a few to-do style comments. Search for "todo!" and "PORTING".

Co-authored-by: Xiretza <xiretza@xiretza.xyz>
(complete, wildcard, expand, history, history/file)
Co-authored-by: Henrik Hørlück Berg <36937807+henrikhorluck@users.noreply.github.com>
(builtins/set)
2023-11-15 11:09:48 +01:00
Johannes Altmanninger
c4155db933 Rename Rust-side parser_t/io_streams_t to Parser/IoStreams
This reduces noise in the upcoming "Port execution" commit.

I accidentally made IoStreams a "class" instead of a "struct".  Would be
easy to correct that but this will be deleted soon, so I don't think we care.
2023-11-15 11:09:48 +01:00
Fabian Boehm
67faa107b0 expand_cmdsubst: Make more errors known
These printed "Unknown error while evaluating command substitution".

Now they print something like

```
fish: for: status: cannot overwrite read-only variable
for status in foo; end
    ^~~~~^
in command substitution
fish: Invalid arguments
echo (for status in foo; end)
     ^~~~~~~~~~~~~~~~~~~~~~~^
```

for `echo (for status in foo; end)`

This is, of course, still not *great*. Mostly the `fish: Invalid
arguments` is basically entirely redundant.

An alternative is to simply skip the error message, but that requires some
more scaffolding (describe_with_prefix adds some error messages on its
own, so we can't simply say "don't add the prefix if we don't have a
message")

(cherry picked from commit 1b5eec2af6)
2023-11-09 17:51:15 +01:00
Fabian Boehm
0f8bcb0414
wildcard: Rationalize file/command completions (#10052)
* wildcard: Remove file size from the description

We no longer add descriptions for normal file completions, so this was
only ever reached if this was a command completion, and then it was
only added if the file wasn't a regular file... in which case it can't
be an executable.

So this was dead.

* Make possible_link() a maybe

This gives us the full information, not just "no" or "maybe"

* wildcard: Rationalize file/command completions

This keeps the entry_t as long as possible, and asks it, so especially
on systems with working d_type we can get by without a single stat in
most cases.

Then it guts file_get_desc, because that is only used for command
completions - we have been disabling file descriptions for *years*,
and so this is never called there.

That means we have no need to print descriptions about e.g. broken symlinks, because those are not executable.

Put together, what this means is that we, in most cases, only do
an *access(2)* call instead of a stat, because that might be checking
more permissions.

So we have the following constellations:

- If we have d_type:
  - We need a stat() for every _symlink_ to get the type (e.g. dir or regular)
    (this is for most symlinks, if we want to know if it's a dir or executable)
  - We need an access() for every file for executables
- If we do not have d_type:
  - We need a stat() for every file
  - We need an lstat() for every file if we do descriptions
    (i.e. just for command completion)
  - We need an access() for every file for executables

As opposed to the current way, where every file gets one lstat whether
with d_type or not, and an additional stat() for links, *and* an
access.

So we go from two syscalls to one for executables.

* Some more comments

* rust link option

* rust remove size

* rust accessovaganza

* Check for .dll first for WSL

This saves quite a few checks if e.g. System32 is in $PATH (which it
is if you inherit windows paths, IIRC).

Note: Our WSL check currently fails for WSL2, where this would
be *more* important because of how abysmal the filesystem performance
on that is.
2023-10-14 08:45:15 +02:00
Johannes Altmanninger
6ef5ae0935 env: skip env lines without equal sign
Given an env like

    foo
    bar=baz

we would set "foo" to empty due to a typo.
The typo is pointed out by a PORTING comment.

Luckily I don't think we ever hit this case because that would mean our
parent process has a serious bug.  Rust's std::env::vars_os() skips env
lines that don't contain a "=" char.  This seems like a reasonable behavior
for us too. Do that.
2023-10-08 20:46:53 +02:00
Fabian Boehm
86803e4442
Reduce stat calls for wildcards ending in "/" (#10032)
This makes it so expand_intermediate_segment knows about the case
where it's last, only followed by a "/".

When it is, it can do without the file_id for finding links (we don't
resolve the files we get here), which allows us to remove a stat()
call.

This speeds up the case of `...*/` by quite a bit.

If that last component was a directory with 1000 subdirectories we
could skip 1000 stat calls!

One slight weirdness: We refuse to add links to directories that we already visited, even if they are the last component and we don't actually follow them. That means we can't do the fast path here either, but we do know if something is a link (if we get d_type), so it still works in common cases.
2023-10-08 16:46:59 +02:00
Fabian Boehm
c4ca1a68d3
Add a clear-screen bind function to clear the screen (#10044)
This can be bound like `bind \cl clear-screen`, and is, by default

In contrast to the current way it doesn't need the external `clear`
command that was always awkward.

Also it will clear the screen and first draw the old prompt to remove
flicker.
Then it will immediately trigger a repaint, so the prompt will be overwritten.
2023-10-08 11:41:30 +02:00
ridiculousfish
f7e7396c69 Fix a deadlock affecting fish_config
This fixes the following deadlock. The C++ functions path_get_config and
path_get_data lazily determine paths and then cache those in a C++ static
variable. The path determination requires inspecting the environment stack.
If these functions are first called while the environment stack is locked
(in this case, when fetching the $history variable) we can get a deadlock.

The fix is to call them eagerly during env_init. This can be removed once
the corresponding C++ functions are removed.

This issue caused fish_config to fail to report colors and themes.

Add a test.
2023-10-07 15:20:14 -07:00
Johannes Altmanninger
48ce8f8721 Remove test_history_speed benchmark
Doesn't seem terribly important? We can add it back easily.
2023-10-07 19:30:46 +02:00
Johannes Altmanninger
ffbb56c4a9 common: port test_format 2023-10-07 19:30:46 +02:00
Johannes Altmanninger
408161f4d6 Port test_tokenizer 2023-10-07 19:30:46 +02:00
Fabian Boehm
496d65fb5d Apply variable overrides for exec
Fixes #9995
2023-10-06 18:15:25 +02:00
Fabian Boehm
ff433b0cb2 reader: Only move cursor if needed for repaint-mode
This uses "screen.reset_line" to move the cursor without informing the
reader's machinery (because that deals with positions *in the
commandline*), but then only repainted "if needed" - meaning if the
reader thought anything changed.

That could lead to a situation where the cursor stays at column 0
until you do something, e.g. in

```fish
bind -m insert u undo
```

when you press alt+u - because the *escape* calls repaint-mode, which
puts the cursor in column 0, and then the undo doesn't, which keeps it
there.

Of course this binding should also `repaint-mode`, because it changes
the mode.

Some changes might be ergonomic:

1. Make repaint-mode the default if the mode changed (we would need to
skip it for bracketed-paste)
2. Make triggering the repaint easier - do we need to set
force_exec_prompt_and_repaint to false here as well?

Anyway, this

Fixes #7910
2023-10-06 16:38:26 +02:00
Fabian Boehm
10d91b0249 screen: Unset color at the end of a line even without clr_eol
This is a sensible thing to do, and fixes some cases where we're
state-dependent.

E.g. this fixes the case in the pager where some things are bold and
some aren't, because that bolding is (rather awkwardly) implicitly
triggered when we have a background, and so we don't notice we need to
re-do that bolding after we moved to the next line because we think we
still have the same color.

Fixes #9617
2023-09-30 15:32:54 +02:00
David Adam
4fab9e525a drop now-unused postfork C++ module 2023-09-25 21:47:19 +08:00
ridiculousfish
555171cb55 Adopt Rust postfork code
This adopts the Rust postfork code, bridging it from C++ exec module.

We use direct function calls for the bridge, rather than cxx/autocxx, so that we
can be sure that no memory allocations or other shenanigans are happening.
2023-09-24 13:04:00 -07:00
ridiculousfish
c862a06874 Implement postfork code in Rust
This implements the "postfork" code in Rust, including calling fork(),
exec(), and all the bits that have to happen in between. postfork lives
in the fork_exec module.

It is not yet adopted.
2023-09-24 13:04:00 -07:00
Henrik Hørlück Berg
80d92dcc6d
Port the easy part of wildcard.{h,cpp}
- wildcard_match is now closer to the original that is linked in a comment, as
  pointer-arithmetic translates very poorly. The act of calling wildcard
  patterns wc or wildcard is kinda confusing when wc elsewhere is widechar.
2023-09-15 14:38:30 +02:00
Fabian Boehm
5b44c26a19 reader: Use existing search string when opening the history pager
I sometimes find myself doing something like this:

- Look for a commandline that includes "echo" (as an example)
- Type echo, press up a few times
- I can't immediately find what I'm looking for
- Press ctrl-r to open up the history pager
- It uses the current commandline as the search string,
  so now I'm looking for "echo foobar"

This makes it so if the search string already is in use, that's what
the history-pager picks as the initial search string.
2023-09-09 08:29:24 +02:00
Henrik Hørlück Berg
6283274c24 Remove C++ version of start_private_mode 2023-09-05 11:38:59 +02:00
Henrik Hørlück Berg
fca41c0459 Fully migrate to Rust env_init 2023-09-05 11:38:59 +02:00
Henrik Hørlück Berg
ea704179c1 Remove now unused in C++ hacks 2023-09-05 11:38:59 +02:00
Henrik Hørlück Berg
eacbd6156d Port and adopt main written in Rust
We don't change anything about compilation-setup, we just immediately jump to
Rust, making the eventual final swap to a Rust entrypoint very easy.

There are some string-usage and format-string differences that are generally
quite messy.
2023-09-05 11:38:59 +02:00
Henrik Hørlück Berg
96e58dac21 Port env_init to Rust
- This does not adopt it.
2023-09-05 11:38:59 +02:00
Henrik Hørlück Berg
55302629cd Add various FFI-interop-functions
- `libc::setlinebuf` is not available through Rust's libc it appears.
- autocxx fails to generate bindings using `*mut FILE`, instead go through
  `void*`
- rust_main needs `parse_util_detect_errors_in_ast`, which is _partially_
  ported, instead add FFI interop for C++.
- We need to set the filename if we are sourcing a file
2023-09-05 11:38:59 +02:00
yanshay
01db48a712
Added fish_sequence_key_delay_ms to set time to wait between sequence key presses (#7401) (#9926)
* added support for fish_sequence_key_delay_ms to set how long to wait between sequence key presses

* fixed cargo fmt
2023-08-30 23:12:22 +02:00
Fabian Boehm
7b5667b11f parse_execution: Remove dead tcgetattr code
This used to be assigned to the job, but that was removed in
f30ce21aaa.

Since then this was vestigial. It could have technically errored out,
but we should be catching that where we use the actual modes, not here.
2023-08-26 14:58:14 +02:00
Fabian Boehm
b454b3bc40 Also allow command and in a pipeline
Similar to `time`, except that one is more common as a command.

Note that this will also allow `builtin and`, which is somewhat
useless, but then it is also useless outside of a pipeline.

Addition to #9985
2023-08-26 13:45:54 +02:00
Fabian Boehm
55c425a0dd fish_key_reader: Humanize key descriptions
This used to print all codepoints outside of the ASCII range (i.e.
above 0x80) in \uXXXX or \UYYYYYYYY notation.

That's quite awkward, considering that this is about keys that are
being pressed, and many keyboards have actual symbols for these on
them - I have an "ö" key, so I would like to use `bind ö` and not
`bind \u00F6`. So we go by iswgraph.

On a slightly different note, `\e` was written as `\c[ (or \e)`. I do
not believe anyone really uses `\c[` (the `[` would need to
be escaped!), and it's confusing and unnecessary to even mention that.
2023-08-26 10:43:42 +02:00
Fabian Boehm
482616f101 parse_util: Only reject time in a pipeline without decorator
This allows e.g. `foo | command time`, while still rejecting `foo | time`.

(this should really be done in the ast itself, but tbh most of
parse_util kinda should)

Fixes #9985
2023-08-25 19:45:15 +02:00
ridiculousfish
04299cb4c9 Remove RgbColor::description
This was unused; deriving Debug is sufficient.
2023-08-19 20:04:23 -07:00
Fabian Boehm
566123edc6
Port builtin count to rust (#9963)
* Port builtin count to rust

* Explicitly use wstring
2023-08-18 23:18:52 +02:00
ridiculousfish
2b25cd1654 Complete the transition of the kill ring and remove kill.cpp
This finishes off the transition of the kill ring from C++ to Rust, and removes
the C++ bits.
2023-08-13 13:06:06 -07:00
Fabian Boehm
5f0df359b8 Remove C++ version of builtin functions
And the C++ reformat_for_screen and event_filter_names as there are no more users.
2023-08-13 14:17:44 +02:00
Fabian Boehm
6489ef5ac0 Rewrite builtin functions in rust 2023-08-13 14:17:44 +02:00
99jte
5b136d450f
Include the target of bad redirects in the error (#9947)
Fixes #8877
2023-08-13 14:01:32 +02:00
ridiculousfish
b2ff4d6bc0 Adopt Rust PosixSpawner
This removes the C++ posix_spawner_t, adopting the Rust implementation.
2023-08-12 17:15:21 -07:00
ridiculousfish
245f7db5b3 Port PosixSpawner to Rust
PosixSpawner is our wrapper around posix_spawn.
2023-08-12 16:59:38 -07:00
Johannes Altmanninger
b7f7dcf788 Copy history pager search field to command line on Enter if no match
Closes #9934
2023-08-08 21:53:42 +02:00
Henrik Hørlück Berg
f4a5de1fbf Port builtins/path to Rust 2023-08-07 21:01:11 -07:00
Fabian Boehm
73d30ac4f8 parse_execution: Remove some useless no_exec checks
These are both clearly behind early returns, there is no need to check it again.

This isn't a case where we're doing logic gymnastics to see that it
can't be run without no_exec() being handled, this is

```c++
if (no_exec()) return;
// ..
// ..
// ..

if (no_exec()) foo;
```
2023-08-07 17:42:47 +02:00
Fabian Boehm
ee75b45687 Remove a waccess call when completing executables
We have already run waccess with X_OK. We already *know* the file is
executable.

There is no reason to check again.

Restores some of the speedup from the fast_waccess hack that was
removed to fix #9699.
2023-08-03 19:53:07 +02:00
Henrik Hørlück Berg
20be990fd9 Port builtins/string to Rust
- Add test to verify piped string replace exit code

Ensure fields parsing error messages are the same.

Note: C++ relied upon the value of the parsed value even when `errno` was set,
that is defined behaviour we should not rely on, and cannot easilt be replicated from Rust.
Therefore the Rust version will change the following error behaviour from:

```shell
> string split --fields=a "" abc
string split: Invalid fields value 'a'
> string split --fields=1a "" abc
string split: 1a: invalid integer
```

To:

```shell
> string split --fields=a "" abc
string split: a: invalid integer
> string split --fields=1a "" abc
string split: 1a: invalid integer
```
2023-07-27 22:00:03 -07:00
ridiculousfish
a672edc0d5 Adopt the new function store and rewrite builtin_function
This adopts the new function store, replacing the C++ version.

It also reimplements builtin_function in Rust, as these was too coupled to
the function store to handle in a separate commit.
2023-07-23 17:18:36 -07:00
ridiculousfish
076f317c31 Implement (but do not yet adopt) fish function store in Rust
This reimplements the function module in Rust. The function module stores the
global set of fish functions, and provides information about them.
2023-07-23 17:18:36 -07:00
Henrik Hørlück Berg
6325b3662d Fix #9899 integer overflow in string repeat
We could end up overflowing if we print out something that's a multiple of the
chunk size, which would then finish printing in the chunk-printing, but not
break out early.
2023-07-17 15:41:08 +02:00
Fabian Boehm
6823f5e337 wildcard: Remove useless access() call for trailing slash
This confirmed that a file existed via access(file, F_OK).

But we already *know* that it does because this is the expansion for
the "trailing slash" - by definition all wildcard components up to
here have already been checked.

And it's not checking for directoryness either because it does F_OK.

This will remove one `access()` per result, which will cut the number
of syscalls needed for a glob that ends in a "/" in half.

This brings us on-par with e.g. `ls` (which uses statx while we use
newfstatat, but that should have about the same results)

Fixes #9891.
2023-07-14 20:20:34 +02:00
David Adam
861da91bf1 drop unused functions and configure checks
Remove the following C++ functions/methods, which have no callers:

fallback.cpp:
- wcstod_l

proc.cpp:
- job_t::get_processes

wutil.cpp:
- fish_wcstoll
- fish_wcstoull

Also drop unused configure checks/defines:
- HAVE_WCSTOD_L
- HAVE_USELOCALE
2023-07-14 20:48:56 +08:00
David Adam
44cf0e5043 add comment regarding importance of unused describe_char function 2023-07-14 20:48:56 +08:00
David Adam
0037e6e98d drop ported C++ functions
Remove the following C++ functions/methods, which have all been ported to Rust and no longer have any callers in C++:
common.cpp:
- assert_is_locked/ASSERT_IS_LOCKED

path.cpp:
- path_make_canonical

wutil.cpp:
- wreadlink
- fish_iswgraph
- file_id_t::older_than
2023-07-14 20:48:56 +08:00
Fabian Boehm
a6c36a014c Return a falsey status if the last -c command has a parse error
This makes `fish -c begin` fail with a status of 127 - it already
printed a syntax error so that was weird. (127 was the status for
syntax errors when piping to fish, so we stay consistent with that)

We allow multiple `-c` commands, and this will return the regular
status if the last `-c` succeeded.

This is fundamentally an extremely weird situation but this is the
simple targeted fix - we did nothing, unsuccessfully, so we should
fail.

Things to consider in future:

1. Return something better than 127 - that's the status for "unknown
command"!
2. Fail after a `-c` failed, potentially even checking all of them
before executing the first?

Fixes #9888
2023-07-12 18:06:34 +02:00
Henrik Hørlück Berg
726819e8ee Clean up feature flags API
This also cleans up and removes unnecessary usage of FFI-oriented `feature_metadata_t`,
which is only used from Rust code after `builtins/status` was ported.
2023-07-11 12:05:38 -07:00
elyashiv
4a2c7e38d0 [jobs.cpp] added const to escaped cmd string 2023-07-10 18:38:26 +02:00
elyashiv
4ea867bc55 [jobs.cpp] add escaping for job comamnd 2023-07-10 18:38:26 +02:00
ridiculousfish
57afaf7fb2 Restore the behavior of remembering the CWD fd in the parser
This will be important for concurrent execution, because different parsers will
have different working directories.
2023-07-10 21:30:37 +08:00
David Adam
289fbecaa9 Rewrite cd builtin in Rust
Note this is slightly incomplete - the FD is not moved into the parser, and so
will be freed at the end of each directory change. The FD saved in the parser is
never actually used in existing code, so this doesn't break anything, but will
need to be corrected once the parser is ported.
2023-07-10 21:30:37 +08:00
Henrik Hørlück Berg
595d593732 Fully migrate to Rust escape string tests and code
Co-Authored-By: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
2023-07-04 13:27:53 -07:00
ridiculousfish
37fed01642 FLOG to stop depending on the ffi
Prior to this commit, FLOG used the ffi bridge to get the output fd. Invert
this: have fish set the output fd within main. This allows FLOG to be used in
pure Rust tests.
2023-07-04 13:26:19 -07:00
Johannes Altmanninger
052823c120 history pager: delete selected history entry with Shift-Delete
After accidentally running a command that includes a pasted password, I want
to delete command from history. Today we need to recall or type (part of)
that command and type "history delete".  Let's maybe add a shortcut to do
this from the history pager.

The current shortcut is Shift+Delete. I don't think that's very discoverable,
maybe we should use Delete instead (but only if the cursor is at the end of
the commandline, otherwise delete a char).

Closes #9454
2023-07-04 18:42:11 +02:00
Johannes Altmanninger
857612d243 Simplify logic for special input functions "and" & "or"
No functional change.
2023-07-04 18:42:11 +02:00
Johannes Altmanninger
5678602af4 Stop special input functions "and" & "or" from tearing up multi-char binding
The tentative binding for the upcoming "history-pager-delete" is

    bind -k sdc history-pager-delete or backward-delete-char

When Shift+Delete is pressed while the history pager is active,
"history-pager-delete" succeeds. In this case, the "or" needs to kick the
"backward-delete-char" out of the input queue.
After doing so, it continues reading, but interprets the input as
single-char binding. This breaks when the next key emits a multi-char sequence,
like the arrow keys.

Fix this by reading a full sequence, which means we need to run "read_char()"
instead of "read_ch()" (confusing, right?).

I'm still working on writing a test. Somehow this only reproduces in the
history pager where Shift+Delete followed by down arrow emits "[B" (since
we swallowed the leading escape char).  Confusingly, it doesn't do that in
the commandline or the completion search field.
2023-07-04 18:42:11 +02:00
Henrik Hørlück Berg
cee2b7c4a2 Remove C++ code 2023-07-01 15:33:01 -07:00
Henrik Hørlück Berg
7b3637cd1f Port builtins/status to fish
- Also port tests of wdirname and wbasename, as they were bugged
2023-07-01 15:33:01 -07:00
David Adam
14cfd268d8 path: drop path_get_paths_ffi
f77dc24 provides the pieces to call path_get_paths directly from Rust
code. Drop the C++ implementation and its FFI.
2023-06-30 10:05:01 +08:00
ridiculousfish
f77dc2451e Expose Rust EnvStack from parser_t
Prior to this change, parser_t exposed an environment_t, and Rust had to go
through that. But because we have implemented Environment in Rust, it is
better to just expose the native Environment from parser_t. Make that
change and update call sites.
2023-06-19 13:45:54 -07:00
Henrik Hørlück Berg
292f7b2be1 Port builtins/argparse to Rust 2023-06-19 13:45:54 -07:00
ridiculousfish
a09947cd99 Implement builtin set_color in Rust
This rewrites the set_color builtin in Rust, restoring italics support in
iTerm2.
2023-06-17 12:14:42 -07:00
ridiculousfish
84b24d5615 Adopt the new output.rs
This switches output.cpp from C++ to Rust.
2023-06-17 12:14:42 -07:00
ridiculousfish
76205e5b55 Port debug_thread_error() to Rust 2023-06-17 12:14:42 -07:00
Simon Börjesson
71c320ca32 Redraw pager on new selection when nothing was selected previously 2023-06-04 13:40:30 -07:00
Clemens Wasser
c2f58cd312 Port killring 2023-06-04 12:18:19 -07:00
David Adam
688a28c1d2 Rewrite and adopt print_help in Rust 2023-06-01 23:17:13 +08:00
David Adam
3b55563769 print_help: simplify function to always use stdout
It's only called in two places and always uses stdout.
2023-05-28 12:55:40 +08:00
David Adam
30d9d48bc1 env_dispatch: drop C++ implementation 2023-05-27 11:32:14 +08:00
Mahmoud Al-Qudsi
6638c78b30 Port env_dispatch to Rust and integrate with C++ code 2023-05-25 16:54:07 -05:00
Mahmoud Al-Qudsi
32912b6525 Expose env_dyn_t in env.h
So that we may use it from files other than `src/env.cpp` to accept a
`&dyn Environment` out of rust.
2023-05-25 16:54:07 -05:00
Mahmoud Al-Qudsi
6bb2725f67 Make sure rust's fish_setlocale() inits global C++ variables
We can't just call the Rust version of `fish_setlocale()` without also either
calling the C++ version of `fish_setlocale()` or removing all `src/complete.cpp`
variables that are initialized and aliasing them to their new rust counterparts.

Since we're not interested in keeping the C++ code around, just call the C++
version of the function via ffi until we don't have *any* C++ code referencing
`src/common.h` at all.

Note that *not* doing this and then calling the rust version of
`fish_setlocale()` instead of the C++ version will cause errant behavior and
random segfaults as the C++ code will try to read and use uninitialized values
(including uninitialized pointers) that have only had their rust counterparts
init.
2023-05-25 16:54:07 -05:00
Mahmoud Al-Qudsi
c409b1a89c Port env_dispatch dependencies to rust
Either add rust wrappers for C++ functions called via ffi or port some pure code
from C++ to rust to provide support for the upcoming `env_dispatch` rewrite.
2023-05-25 16:54:07 -05:00
Mahmoud Al-Qudsi
8a549cbb15 Port/move some code from src/environment.cpp to src/env/mod.rs
The global variables are moved (not copied) from C++ to rust and exported as
extern C integers. On the rust side they are accessed only with atomic semantics
but regular int access is preserved from the C++ side (until that code is also
ported).
2023-05-25 16:54:07 -05:00
Mahmoud Al-Qudsi
3ab8b34b1e Use Rust version of global fallback variables 2023-05-25 16:54:07 -05:00
ridiculousfish
21e31c9b59 Remove C++ builtin test implementation
Now that builtin test is in Rust, remove the C++ bits.
2023-05-21 11:50:24 -07:00
ridiculousfish
d0aba9d42c Port builtin_test tests to Rust
fish_tests has a bunch of tests for the 'test' builtin. Port these to Rust.
2023-05-21 11:50:24 -07:00
ridiculousfish
cdb77a6176 Adopt the Rust test builtin
This switches the builtin test implementation from C++ to Rust
2023-05-21 11:50:24 -07:00
ridiculousfish
10a7de03e2 Implement builtin test in Rust
This implements (but does not yet adopt) builtin test in Rust.
2023-05-21 11:50:24 -07:00
ridiculousfish
60d439ab22 Rationalize fish_wcstoi/d and friends
Historically fish has used the functions `fish_wcstol`, `fish_wcstoi`, and
`fish_wcstoul` (and some long long variants) for most integer conversions.
These have semantics that are deliberately different from the libc
functions, such as consuming trailing whitespace, and disallowing `-` in
unsigned versions.

fish has started to drift away from these semantics; some divergence from
C++ has crept in.

Rename the existing `fish_wcs*` functions in Rust to remove the fish
prefix, to express that they attempt to mirror libc semantics; then
introduce `fish_` wrappers which are ported from C++. Also fix some
miscellaneous bugs which have crept in, such as missing range checks.
2023-05-14 18:03:52 -07:00
ridiculousfish
e71b75e0e4 Reimplement environment and the environment stack in Rust
This reimplements the environment stack in Rust.
2023-05-07 15:15:56 -07:00
ridiculousfish
8ec1467dda Implement (but do not yet adopt) Environment in Rust
This implements the primary environment stack, and other environments such
as the null and snapshot environments, in Rust. These are used to implement
the push and pop from block scoped commands such as `for` and `begin`, and
also function calls.
2023-05-07 15:15:56 -07:00
ridiculousfish
0681b6b53a Make C++ env_var_t wrap Rust EnvVar
This reimplements C++'s env_var_t to reference a Rust EnvVar.
The C++ env_var_t is now just a thin wrapper.
2023-05-07 15:15:56 -07:00
ridiculousfish
10ee87eb28 Reimplement owning_null_terminated_array in Rust
owning_null_terminated_array is used for environment variables, where we need to
provide envp for child processes. This switches the implementation from C++ to
Rust.

We retain the C++ owning_null_terminated_array_t; it simply wraps the Rust
version now.
2023-05-07 15:15:56 -07:00
Mahmoud Al-Qudsi
73983bada5 Fix ncurses memory leak in init_curses()
init_curses() is/can be called more than once, in which case the previous
ncurses terminal state is leaked and a new one is allocated.

`del_curterm(cur_term)` is supposed to be called prior to calling `setupterm()`
if `setupterm()` is being used to reinit the default `TERMINAL *cur_term`.
2023-05-02 11:52:42 -05:00
Mahmoud Al-Qudsi
3651e0e9d8 Actually report ASAN memory leaks
The new asan exit handlers are called to get proper ASAN leak reports (as
calling _exit(0) skips the LSAN reporting stage and exits with success every
time).

They are no-ops when not compiled for ASAN.
2023-05-02 11:52:41 -05:00
ridiculousfish
4771f25102 Adopt the new Rust signal implementation
This switches the signals implementation from C++ to Rust.
2023-04-30 16:22:57 -07:00
ridiculousfish
1ecf9d013d Port (but do not adopt) signal handling bits in Rust
This ports some signal setup and handling bits to Rust.

The signal handling machinery requires walking over the list of known signals;
that's not supported by the Signal type. Rather than duplicate the list of
signals yet again, switch back to a table, as we had in C++.

This also adds two further pieces which were neglected by the Signal struct:

1. Localize signal descriptions
2. Support for integers as the signal name
2023-04-30 16:22:55 -07:00
Mahmoud Al-Qudsi
ecf1676601 Add and use type-erased RAII callback wrapper for ffi
This allows the rust code to free up C++ resources allocated for a callback even
when the callback isn't executed (as opposed to requiring the callback to run
and at the end of the callback cleaning up all allocated resources).

Also add type-erased destructor registration to callback_t. This allows for
freeing variables allocated by the callback for debounce_t's
perform_with_callback() that don't end up having their completion called due to
a timeout.
2023-04-29 11:02:59 -05:00
Mahmoud Al-Qudsi
6cd2d0ffed Integrate threads.rs w/ legacy C++ code
Largely routine but for the trampolines in iothread.h and iothread.cpp which
were a real PITA to get correct w/ all their variants.

Integration is complete with all old code ripped out and the tests using the
rust version of the code.
2023-04-29 11:02:59 -05:00
Xiretza
b76e6c5637 complete: fix condition to suppress variable autocompletion 2023-04-25 21:47:11 -07:00
Johannes Altmanninger
1df64a4891 Replace maybe_t::missing_or_empty with a more Rust-friendly helper
There are many places where we want to treat a missing variable the same as
a variable with an empty value.

In C++ we handle this by branching on maybe_t<env_var_t>::missing_or_empty().
If it returns false, we go on to access maybe_t<env_var_t>::value() aka
operator*.

In Rust, Environment::get() will return an Option<EnvVar>.
We could define a MissingOrEmpty trait and implement it for Option<EnvVar>.

However that will still leave us with ugly calls to Option::unwrap()
(by convention Rust does use shorthands like *).

Let's add a variable getter that returns none for empty variables.
2023-04-21 13:57:29 +02:00
Johannes Altmanninger
82a797db9c clang-format C++ builtins 2023-04-21 13:57:29 +02:00
Johannes Altmanninger
33f51b45e4 Tease apart parser.eval() overloads
The most common overload takes a string and an io chain so let that one keep
its name.
2023-04-21 13:57:29 +02:00
Johannes Altmanninger
12ce42a2f9 Rename kw() to keyword() also in C++ 2023-04-19 22:43:36 +02:00
Johannes Altmanninger
e4f6169a01 clang-format C++ files
Forgot to run this after the wcstring_list_t -> std::vector<wcstring> rename.
2023-04-19 22:43:36 +02:00
Johannes Altmanninger
09ffac5a0a Port parse_util_compute_indents 2023-04-19 10:35:22 +02:00
Johannes Altmanninger
12afb320a3 Port parse_util
Except for the indent visitor bits.

Tests for parse_util_detect_errors* are not ported yet because they depend
on expand.h (and operation_context.h which depends on env.h).
2023-04-19 01:03:16 +02:00
Johannes Altmanninger
22c8e9f60d Don't leak ParseErrorList FFI crutch type into Rust
Just like 16ea4380c (redirection.rs: don't leak FFI type into Rust code,
2023-04-09).
2023-04-19 01:03:16 +02:00
Johannes Altmanninger
6ede7f8009 Delete wcstring_list_t
We don't want it in Rust. Remove it to smoothen the transition.
2023-04-19 01:03:16 +02:00
Johannes Altmanninger
fdeb0d9f06 Port the rest of wcstringutil 2023-04-18 12:54:19 +02:00
ridiculousfish
1bf29a5e13 Support constructing a wcstring_list_ffi_t from Rust
This allows passing a vector of strings from Rust to C++
2023-04-16 13:36:13 -07:00
Xiretza
aab2f660a7 Port math builtin, tinyexpr and wcstod_underscores to Rust 2023-04-16 22:26:46 +02:00
Xiretza
cc744d30c0 io: add FFI wrappers for io_streams_t fields 2023-04-16 22:26:46 +02:00
Johannes Altmanninger
971d257e67 Port AST to Rust
The translation is fairly direct though it adds some duplication, for example
there are multiple "match" statements that mimic function overloading.

Rust has no overloading, and we cannot have generic methods in the Node trait
(due to a Rust limitation, the error is like "cannot be made into an object")
so we include the type name in method names.

Give clients like "indent_visitor_t" a Rust companion ("IndentVisitor")
that takes care of the AST traversal while the AST consumption remains
in C++ for now.  In future, "IndentVisitor" should absorb the entirety of
"indent_visitor_t".  This pattern requires that "fish_indent" be exposed
includable header to the CXX bridge.

Alternatively, we could define FFI wrappers for recursive AST traversal.

Rust requires we separate the AST visitors for "mut" and "const"
scenarios. Take this opportunity to concretize both visitors:

The only client that requires mutable access is the populator.  To match the
structure of the C++ populator which makes heavy use of function overloading,
we need to add a bunch of functions to the trait. Since there is no other
mutable visit, this seems acceptable.

The "const" visitors never use "will_visit_fields_of()" or
"did_visit_fields_of()", so remove them (though this is debatable).

Like in the C++ implementation, the AST nodes themselves are largely defined
via macros.  Union fields like "Statement" and "ArgumentOrRedirection"
do currently not use macros but may in future.

This commit also introduces a precedent for a type that is defined in one
CXX bridge and used in another one - "ParseErrorList".  To make this work
we need to manually define "ExternType".

There is one annoyance with CXX: functions that take explicit lifetime
parameters require to be marked as unsafe. This makes little sense
because functions that return `&Foo` with implicit lifetime can be
misused the same way on the C++ side.

One notable change is that we cannot directly port "find_block_open_keyword()"
(which is used to compute an error) because it relies on the stack of visited
nodes. We cannot modify a stack of node references while we do the "mut"
walk. Happily, an idiomatic solution is easy: we can tell the AST visitor
to backtrack to the parent node and create the error there.

Since "node_t::accept_base" is no longer a template we don't need the
"node_visitation_t" trampoline anymore.

The added copying at the FFI boundary makes things slower (memcpy dominates
the profile) but it's not unusable, which is good news:

    $ hyperfine ./fish.{old,new}" -c 'source ../share/completions/git.fish'"
    Benchmark 1: ./fish.old -c 'source ../share/completions/git.fish'
      Time (mean ± σ):     195.5 ms ±   2.9 ms    [User: 190.1 ms, System: 4.4 ms]
      Range (min … max):   193.2 ms … 205.1 ms    15 runs

    Benchmark 2: ./fish.new -c 'source ../share/completions/git.fish'
      Time (mean ± σ):     677.5 ms ±  62.0 ms    [User: 665.4 ms, System: 10.0 ms]
      Range (min … max):   611.7 ms … 805.5 ms    10 runs

    Summary
      './fish.old -c 'source ../share/completions/git.fish'' ran
        3.47 ± 0.32 times faster than './fish.new -c 'source ../share/completions/git.fish''

Leftovers:
- Enum variants are still snakecase; I didn't get around to changing this yet.
- "ast_type_to_string()" still returns a snakecase name. This could be
  changed since  it's not user visible.
2023-04-16 17:46:56 +02:00
Johannes Altmanninger
8ae1ba3432 wutil: remove unused locale handling code that has been ported already 2023-04-16 17:21:54 +02:00
Johannes Altmanninger
77ae80f842 wutil.cpp: remove unused function 2023-04-16 17:21:54 +02:00
Johannes Altmanninger
d47590b864 proc.h: remove unused declaration 2023-04-16 17:21:54 +02:00
Johannes Altmanninger
16ea4380c5 redirection.rs: don't leak FFI type into Rust code 2023-04-16 17:21:54 +02:00
Johannes Altmanninger
a848877e65 Remove an overload in io, to prepare for Rust 2023-04-16 17:21:54 +02:00
Johannes Altmanninger
df6525e770 Make RustBuiltin a scoped enum
This prevents name clashes. It already is used as scoped enum.
2023-04-16 17:21:54 +02:00
Fabian Boehm
72a32f1a12 Rewrite "builtin" builtin in Rust
This is very simple and basically a subset of type.
2023-04-16 11:30:31 +02:00
Fabian Boehm
b65a53a2a6 Rewrite "command" builtin in Rust
This is basically a subset of type, so we might as well.

To be clear this is `command -s` and friends, if you do `command grep` that's
handled as a keyword.

One issue here is that we can't get "one path or not" because I don't
know how to translate a maybe_t? Do we need to make it a shared_ptr instead?
2023-04-16 11:27:08 +02:00
Fabian Boehm
662a4740e2 Rewrite the type builtin in rust 2023-04-16 11:27:08 +02:00