# Description
Currently there is a bit of chaos regarding construction of history file
paths. Various pieces of code across a number of crates reimplement the
same/similar logic:
- There is `get_history_path`, but it requires a directory parameter (it
really just joins it with a file name).
- Some places use a const for the directory parameter, others use a
string literal - in all cases the value seems to be `"nushell"`.
- Some places assume the `"nushell"` value, other plumb it down from
close to the top of the call stack.
- Some places use a constant for history file names while others assume
it.
This PR tries to make it so that the history/config path format is
defined in a single places and so dependencies on it are easier to
follow:
- It removes `get_history_path` and adds a `file_path` method to
`HistoryConfig` instead (an extra motivation being, this is a convenient
place that can be used from all creates that need a history file path)
- Adds a `nu_config_dir` function that returns the nushell configuration
directory.
- Updates existing code to rely on the above, effectively removing
duplicate uses of `"nushell"` and `NUSHELL_FOLDER` and assumptions about
file names associated with different history formats
# User-Facing Changes
None
# Description
Fixes a small side-issue in #10977 - If a command flag didn't have a
comment/description, it would still show an unnecessary separator at the
end of the line.
This fixes that, plus uses the `: ` (colon) to separate the flag from
the description. This aligns with the way that named parameters are
handled.
# User-Facing Changes
Help/doc only
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
N/A
Updated summary for commit
[612e0e2](612e0e2160)
- While folks are welcome to read through the entire comments, the core
information is summarized here.
# Description
This PR drastically improves startup times of Nushell by only parsing a
single submodule of the Standard Library that provides the `banner` and
`pwd` commands. All other Standard Library commands and submodules are
parsed when imported by the user. This cuts startup times by more than
60%.
At the moment, we have stopped adding to `std-lib` because every
addition adds a small amount to the Nushell startup time.
With this change, we should once again be able to allow new
functionality to be added to the Standard Library without it impacting
`nu` startup times.
# User-Facing Changes
* Nushell now starts about 60% faster
* Breaking change: The `dirs` (Shells) aliases will return a warning
message that it will not be auto-loaded in the following release, along
with instructions on how to restore it (and disable the message)
* The `use std <submodule> *` syntax is available for convenience, but
should be avoided in scripts as it parses the entire `std` module and
all other submodules and places it in scope. The correct syntax to
*just* load a submodule is `use std/<submodule> *` (asterisk optional).
The slash is important. This will be documented.
* `use std *` can be used for convenience to load all of the library but
still incurs the full loading-time.
* `std/dirs`: Semi-breaking change. The `dirs` command replaces the
`show` command. This is more in line with the directory-stack
functionality found in other shells. Existing users will not be impacted
by this as the alias (`shells`) remains the same.
* Breaking-change: Technically a breaking change, but probably only
impacts maintainers of `std`. The virtual path for the standard library
has changed. It could previously be imported using its virtual path (and
technically, this would have been the correct way to do it):
```nu
use NU_STDLIB_VIRTUAL_DIR/std
```
The path is now simply `std/`:
```nu
use std
```
All submodules have moved accordingly.
# Timings
Comparisons below were made:
* In a temporary, clean config directory using `$env.XDG_CONFIG_HOME =
(mktemp -d)`.
* `nu` was run with a release build
* `nu` was run one time to generate the default `config.nu` (etc.) files
- Otherwise timings would include the user-prompt
* The shell was exited and then restarted several times to get timing
samples
(Note: Old timings based on 0.97 rather than 0.98, but in the range of
being accurate)
| Scenario | `$nu.startup-time` |
| --- | --- |
| 0.97.2
([aaaab8e](aaaab8e070))
Without this PR | 23ms - 24ms |
| This PR with deprecated commands | 9ms - <11ms |
| This PR after deprecated commands are removed in following release |
8ms - <10ms |
| Final PR (remove deprecated), using `--no-std-lib` | 6.1ms to 6.4ms |
| Final PR (remove deprecated), using `--no-config-file` | 3.1ms - 3.6ms
|
| Final PR (remove deprecated), using `--no-config-file --no-std-lib` |
1ms - 1.5ms |
*These last two timings point to the opportunity for further
optimization (see comment in thread below (will link once I write it).*
# Implementation details for future maintenance
* `use std banner` is a ridiculously deceptive call. That call parses
and imports *all* of `std` into scope. Simply replacing it with `use
std/core *` is essentially what saves ~14-15ms. This *only* imports the
submodule with the `banner` and `pwd` commands.
* From the code-comments, the reason that `NU_STDLIB_VIRTUAL_DIR` was
used as a prefix was so that there wouldn't be an issue if a user had a
`./std/mod.nu` in the current directory. This does **not** appear to be
an issue. After removing the prefix, I tested with both a relative
module as well as one in the `$env.NU_LIB_DIRS` path, and in all cases
the *internal* `std` still took precedence.
* By removing the prefix, users can now `use std` (and variants) without
requiring that it already be parsed and in scope.
* In the next release, we'll stop autoloading the `dirs` (shells)
functionality. While this only costs an additional 1-1.5ms, I think it's
better moved to the `config.nu` where the user can optionally remove it.
The main reason is its use of aliases (which have also caused issues) -
The `n`, `p`, and `g` short-commands are valuable real-estate, and users
may want to map these to something else.
For this release, there's an `deprecated_dirs` module that is still
autoloaded. As with the top-level commands, use of these will give a
deprecation warning with instructions on how to handle going forward.
To help with this, moved the aliases to their own submodule inside the
`dirs` module.
* Also sneaks in a small change where the top-level `dirs` command is
now the replacement for `dirs show`
* Fixed a double-import of `assert` in `dirs.nu`
* The `show_banner` step is replaced with simply `banner` rather than
re-importing it.
* A `virtual_path` may now be referenced with either a forward-slash or
a backward-slash on Windows. This allows `use std/<submodule>` to work
on all platforms.
# Performance side-notes:
* Future parsing and/or IR improvements should improve performance even
further.
* While the existing load time penalty of `std-lib` was not noticeable
on many systems, Nushell runs on a wide-variety of hardware and OS
platforms. Slower platforms will naturally see a bigger jump in
performance here. For users starting multiple Nushell sessions
frequently (e.g., `tmux`, Zellij, `screen`, et. al.) it is recommended
to keep total startup time (including user configuration) under ~250ms.
# Tests + Formatting
* All tests are green
* Updated tests:
- Removed the test that confirmed that `std` was loaded (since we
don't).
- Removed the `shells` test since it is not autoloaded. Main `dirs.nu`
functionality is tested through `stdlib-test`.
- Many tests assumed that the library was fully loaded, because it was
(even though we didn't intend for it to be). Fixed those tests.
- Tests now import only the necessary submodules (e.g., `use
std/assert`, rather than `use std assert`)
- Some tests *thought* they were loading `std/log`, but were doing so
improperly. This was masked by the now-fixed "load-everything-into-scope
bug". Local CI would pass due the `$env.NU_LOG_<...>` variables being
inherited from the calling process, but would fail in the "clean" GitHub
CI environment. These tests have also been fixed.
* Added additional tests for the changes
# After Submitting
Will update the Standard Library doc page
# Description
Old code was comparing remaining positional arguments with total number
of arguments, where it should've compared remaining positional with
with remaining arguments of any kind. This means that if a function was
given too few arguments, `calculate_end_span` would believe that it
actually had too many arguments, since after parsing the first few
arguments, the number of remaining arguments needed were fewer than the
*total* number of arguments, of which we had used several.
Fixes#9072
Fixes: https://github.com/nushell/nushell/issues/13930
Fixes: https://github.com/nushell/nushell/issues/12069
Fixes: https://github.com/nushell/nushell/issues/8385
Extracted from #10381
## Bonus
It also improves the error handling on missing positional arguments
before keywords (no longer crashing since #9851). Instead of just giving
the keyword to the parser for the missing positional, we give an
explicit error about a missing positional argument. I would like better
descriptions than "missing var_name" though, but I'm not sure if that's
available without
Old error
```
Error: nu::parser::parse_mismatch
× Parse mismatch during operation.
╭─[entry #1:1:1]
1 │ let = if foo
· ┬
· ╰── expected valid variable name
╰────
```
New error
```
Error: nu::parser::missing_positional
× Missing required positional argument.
╭─[entry #18:1:1]
1 │ let = foo
· ┬
· ╰── missing var_name
╰────
help: Usage: let <var_name> = <initial_value>
```
# User-Facing Changes
The program `alias = = =` is no longer accepted by the parser
# Description
`bits rol` and `bits ror` were both undefined for the full byte rotates
and panicked when exceeding the byte rotation range.
`bits ror` further more produced nonsensical results by pulling bits
from the following byte instead of the preceding byte.
Those bugs are now fixed
# User-Facing Changes
Sound Nushell `IncorrectValue` error when exceeding the available bits
# Tests + Formatting
Added the necessary tests
# Description
The meaning of the word usage is specific to describing how a command
function is *used* and not a synonym for general description. Usage can
be used to describe the SYNOPSIS or EXAMPLES sections of a man page
where the permitted argument combinations are shown or example *uses*
are given.
Let's not confuse people and call it what it is a description.
Our `help` command already creates its own *Usage* section based on the
available arguments and doesn't refer to the description with usage.
# User-Facing Changes
`help commands` and `scope commands` will now use `description` or
`extra_description`
`usage`-> `description`
`extra_usage` -> `extra_description`
Breaking change in the plugin protocol:
In the signature record communicated with the engine.
`usage`-> `description`
`extra_usage` -> `extra_description`
The same rename also takes place for the methods on
`SimplePluginCommand` and `PluginCommand`
# Tests + Formatting
- Updated plugin protocol specific changes
# After Submitting
- [ ] update plugin protocol doc
# Description
Fixes#11267
Shifting by a `shift >= num_bits` is undefined in the underlying
operation. Previously we also had an overflow on negative shifts for the
operators `bit-shl` and `bit-shr`
Furthermore I found a severe bug in the implementation of shifting of
`binary` data with the commands `bits shl` and `bits shr`, this
categorically produced incorrect results with shifts that were not
`shift % 4 == 0`. `bits shr` also was able to produce outputs with
different size to the input if the shift was exceeding the length of the
input data by more than a byte.
# User-Facing Changes
It is now an error trying to shift by more than the available bits with:
- `bit-shl` operator
- `bit-shr` operator
- command `bits shl`
- command `bits shr`
# Tests + Formatting
Added testing for all relevant cases
# Description
As per our Wednesday meeting, this adds a parse error when something
that would be parsed as an external call is present at the top level,
unless the head of the external call begins with a caret (to make it
explicit).
I tried to make the error quite descriptive about what should be done.
# User-Facing Changes
These now cause a parse error:
```nushell
$foo = bar
$foo = `bar`
```
These would have been interpreted as strings before this version, but
now they'd be interpreted as external calls. This behavior is consistent
with `let`/`mut` (which is unaffected by this change).
Here is an example of the error:
```
Error: × External command calls must be explicit in assignments
╭─[entry #3:1:8]
1 │ $foo = bar
· ─┬─
· ╰── add a caret (^) before the command name if you intended to run and capture its output
╰────
help: the parsing of assignments was changed in 0.97.0, and this would have previously been treated as a string.
Alternatively, quote the string with single or double quotes to avoid it being interpreted as a command name. This
restriction may be removed in a future release.
```
# Tests + Formatting
Tests added to cover the change. Note made about it being temporary.
# Description
Part 4 of replacing std::path types with nu_path types added in
https://github.com/nushell/nushell/pull/13115. This PR migrates various
tests throughout the code base.
# Description
Part 3 of replacing `std::path` types with `nu_path` types added in
#13115. This PR targets the paths listed in `$nu`. That is, the home,
config, data, and cache directories.
# Description
This makes assignment operations and `const` behave the same way `let`
and `mut` do, absorbing the rest of the pipeline.
Changes the lexer to be able to recognize assignment operators as a
separate token, and then makes the lite parser continue to push spans
into the same command regardless of any redirections or pipes if an
assignment operator is encountered. Because the pipeline is no longer
split up by the lite parser at this point, it's trivial to just parse
the right hand side as if it were a subexpression not contained within
parentheses.
# User-Facing Changes
Big breaking change. These are all now possible:
```nushell
const path = 'a' | path join 'b'
mut x = 2
$x = random int
$x = [1 2 3] | math sum
$env.FOO = random chars
```
In the past, these would have led to (an attempt at) bare word string
parsing. So while `$env.FOO = bar` would have previously set the
environment variable `FOO` to the string `"bar"`, it now tries to run
the command named `bar`, hence the major breaking change.
However, this is desirable because it is very consistent - if you see
the `=`, you can just assume it absorbs everything else to the right of
it.
# Tests + Formatting
Added tests for the new behaviour. Adjusted some existing tests that
depended on the right hand side of assignments being parsed as
barewords.
# After Submitting
- [ ] release notes (breaking change!)
# Description
Fixes#13441.
I must have forgotten that `Expr::Range` can contain other expressions,
so I wasn't searching for `$in` to replace within it. Easy fix.
# User-Facing Changes
Bug fix, ranges like `6 | 3..$in` work as expected now.
# Tests + Formatting
Added regression test.
# Description
This corrects the parsing of unknown arguments provided to known
externals to behave exactly like external arguments passed to normal
external calls.
I've done this by adding a `SyntaxShape::ExternalArgument` which
triggers the same parsing rules.
Because I didn't like how the highlighting looked, I modified the
flattener to emit `ExternalArg` flat shapes for arguments that have that
syntax shape and are plain strings/globs. This is the same behavior that
external calls have.
Aside from passing the tests, I've also checked manually that the
completer seems to work adequately. I can confirm that specified
positional arguments get completion according to their specified type
(including custom completions), and then anything remaining gets
filepath style completion, as you'd expect from an external command.
Thanks to @OJarrisonn for originally finding this issue.
# User-Facing Changes
- Unknown args are now parsed according to their specified syntax shape,
rather than `Any`. This may be a breaking change, though I think it's
extremely unlikely in practice.
- The unspecified arguments of known externals are now highlighted /
flattened identically to normal external arguments, which makes it more
clear how they're being interpreted, and should help the completer
function properly.
- Known externals now have an implicit rest arg if not specified named
`args`, with a syntax shape of `ExternalArgument`.
# Tests + Formatting
Tests added for the new behaviour. Some old tests had to be corrected to
match.
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
- [ ] release notes (bugfix, and debatable whether it's a breaking
change)
# Description
This grew quite a bit beyond its original scope, but I've tried to make
`$in` a bit more consistent and easier to work with.
Instead of the parser generating calls to `collect` and creating
closures, this adds `Expr::Collect` which just evaluates in the same
scope and doesn't require any closure.
When `$in` is detected in an expression, it is replaced with a new
variable (also called `$in`) and wrapped in `Expr::Collect`. During
eval, this expression is evaluated directly, with the input and with
that new variable set to the collected value.
Other than being faster and less prone to gotchas, it also makes it
possible to typecheck the output of an expression containing `$in`,
which is nice. This is a breaking change though, because of the lack of
the closure and because now typechecking will actually happen. Also, I
haven't attempted to typecheck the input yet.
The IR generated now just looks like this:
```gas
collect %in
clone %tmp, %in
store-variable $in, %tmp
# %out <- ...expression... <- %in
drop-variable $in
```
(where `$in` is the local variable created for this collection, and not
`IN_VARIABLE_ID`)
which is a lot better than having to create a closure and call `collect
--keep-env`, dealing with all of the capture gathering and allocation
that entails. Ideally we can also detect whether that input is actually
needed, so maybe we don't have to clone, but I haven't tried to do that
yet. Theoretically now that the variable is a unique one every time, it
should be possible to give it a type - I just don't know how to
determine that yet.
On top of that, I've also reworked how `$in` works in pipeline-initial
position. Previously, it was a little bit inconsistent. For example,
this worked:
```nushell
> 3 | do { let x = $in; let y = $in; print $x $y }
3
3
```
However, this causes a runtime variable not found error on the second
`$in`:
```nushell
> def foo [] { let x = $in; let y = $in; print $x $y }; 3 | foo
Error: nu:🐚:variable_not_found
× Variable not found
╭─[entry #115:1:35]
1 │ def foo [] { let x = $in; let y = $in; print $x $y }; 3 | foo
· ─┬─
· ╰── variable not found
╰────
```
I've fixed this by making the first element `$in` detection *always*
happen at the block level, so if you use `$in` in pipeline-initial
position anywhere in a block, it will collect with an implicit
subexpression around the whole thing, and you can then use that `$in`
more than once. In doing this I also rewrote `parse_pipeline()` and
hopefully it's a bit more straightforward and possibly more efficient
too now.
Finally, I've tried to make `let` and `mut` a lot more straightforward
with how they handle the rest of the pipeline, and using a redirection
with `let`/`mut` now does what you'd expect if you assume that they
consume the whole pipeline - the redirection is just processed as
normal. These both work now:
```nushell
let x = ^foo err> err.txt
let y = ^foo out+err>| str length
```
It was previously possible to accomplish this with a subexpression, but
it just seemed like a weird gotcha that you couldn't do it. Intuitively,
`let` and `mut` just seem to take the whole line.
- closes#13137
# User-Facing Changes
- `$in` will behave more consistently with blocks and closures, since
the entire block is now just wrapped to handle it if it appears in the
first pipeline element
- `$in` no longer creates a closure, so what can be done within an
expression containing `$in` is less restrictive
- `$in` containing expressions are now type checked, rather than just
resulting in `any`. However, `$in` itself is still `any`, so this isn't
quite perfect yet
- Redirections are now allowed in `let` and `mut` and behave pretty much
how you'd expect
# Tests + Formatting
Added tests to cover the new behaviour.
# After Submitting
- [ ] release notes (definitely breaking change)
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# Description
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Replaces the `dirs_next` family of crates with `dirs`. `dirs_next` was
born when the `dirs` crates were abandoned three years ago, but they're
being maintained again and most projects depend on `dirs` nowadays.
`dirs_next` has been abandoned since.
This came up while working on
https://github.com/nushell/nushell/pull/13382.
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
None.
# Tests + Formatting
<!--
Don't forget to add tests that cover your changes.
Make sure you've run and fixed any issues with these commands:
- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used` to
check that you're using the standard code style
- `cargo test --workspace` to check that all tests pass (on Windows make
sure to [enable developer
mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging))
- `cargo run -- -c "use toolkit.nu; toolkit test stdlib"` to run the
tests for the standard library
> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
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Tests and formatter have been run.
# After Submitting
<!-- If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
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-->
Fixesnushell/nushell#13207
# Description
This fixes the parsing of command usage when that command comes from a
file with CRLF line endings.
See nushell/nushell#13207 for more details.
# User-Facing Changes
Users on Windows will get correct autocompletion for `std` commands.
# Description
Fixes: https://github.com/nushell/nushell/issues/7761
It's still unsure if we want to change the `range semantic` itself, but
it's good to keep range semantic consistent between nushell commands.
# User-Facing Changes
### Before
```nushell
❯ "abc" | str substring 1..=2
b
```
### After
```nushell
❯ "abc" | str substring 1..=2
bc
```
# Tests + Formatting
Adjust tests to fit new behavior
# Description
Changes `get_full_help` to take a `&dyn Command` instead of multiple
arguments (`&Signature`, `&Examples` `is_parser_keyword`). All of these
arguments can be gathered from a `Command`, so there is no need to pass
the pieces to `get_full_help`.
This PR also fixes an issue where the search terms are not shown if
`--help` is used on a command.
# Description
Fixes: #12691
In `parse_short_flag`, it only checks special cases for
`SyntaxShape::Int`, `SyntaxShape::Number` to allow a flag to be a
number. This pr adds `SyntaxShape::Float` to allow a flag to be float
number.
# User-Facing Changes
This is possible after this pr:
```nushell
def spam [val: float] { $val };
spam -1.4
```
# Tests + Formatting
Added 1 test
# Description
Fixes: #12795
The issue is caused by an empty position of `ParseError::UnexpectedEof`.
So no detailed message is displayed.
To fix the issue, I adjust the start of span to `span.end - 1`. In this
way, we can make sure that it never points to an empty position.
After lexing item, I also reorder the unclosed character checking . Now
it will be checking unclosed opening delimiters first.
# User-Facing Changes
After this pr, it outputs detailed error message for incomplete string
when running scripts.
## Before
```
❯ nu -c "'ab"
Error: nu::parser::unexpected_eof
× Unexpected end of code.
╭─[source:1:4]
1 │ 'ab
╰────
> ./target/debug/nu -c "r#'ab"
Error: nu::parser::unexpected_eof
× Unexpected end of code.
╭─[source:1:6]
1 │ r#'ab
╰────
```
## After
```
> nu -c "'ab"
Error: nu::parser::unexpected_eof
× Unexpected end of code.
╭─[source:1:3]
1 │ 'ab
· ┬
· ╰── expected closing '
╰────
> ./target/debug/nu -c "r#'ab"
Error: nu::parser::unexpected_eof
× Unexpected end of code.
╭─[source:1:5]
1 │ r#'ab
· ┬
· ╰── expected closing '#
╰────
```
# Tests + Formatting
Added some tests for incomplete string.
---------
Co-authored-by: Ian Manske <ian.manske@pm.me>
This PR should close#7147
# Description
Merged src/tests into /tests to produce a single binary.
# User-Facing Changes
No user facing changes
# Tests + Formatting
Moved tests. Tollkit check pr pass.
# After Submitting
---------
Co-authored-by: Ian Manske <ian.manske@pm.me>
