# Description
Add `ulimit` command to Nushell.
Closes#9563Closes#3976
Related pr #11246
Reference:
https://github.com/fish-shell/fish-shell/blob/master/fish-rust/src/builtins/ulimit.rshttps://github.com/mirror/busybox/blob/master/shell/shell_common.c#L529
# User-Facing Changes
```
nushell on ulimit is 📦 v0.88.2 via 🦀 v1.72.1 [3/246]
❯ ulimit -a
╭────┬──────────────────────────────────────────────────────────────────────────┬───────────┬───────────╮
│ # │ description │ soft │ hard │
├────┼──────────────────────────────────────────────────────────────────────────┼───────────┼───────────┤
│ 0 │ Maximum size of core files created (kB, -c) │ unlimited │ unlimited │
│ 1 │ Maximum size of a process's data segment (kB, -d) │ unlimited │ unlimited │
│ 2 │ Controls of maximum nice priority (-e) │ 0 │ 0 │
│ 3 │ Maximum size of files created by the shell (kB, -f) │ unlimited │ unlimited │
│ 4 │ Maximum number of pending signals (-i) │ 55273 │ 55273 │
│ 5 │ Maximum size that may be locked into memory (kB, -l) │ 8192 │ 8192 │
│ 6 │ Maximum resident set size (kB, -m) │ unlimited │ unlimited │
│ 7 │ Maximum number of open file descriptors (-n) │ 1024 │ 524288 │
│ 8 │ Maximum bytes in POSIX message queues (kB, -q) │ 800 │ 800 │
│ 9 │ Maximum realtime scheduling priority (-r) │ 0 │ 0 │
│ 10 │ Maximum stack size (kB, -s) │ 8192 │ unlimited │
│ 11 │ Maximum amount of CPU time in seconds (seconds, -t) │ unlimited │ unlimited │
│ 12 │ Maximum number of processes available to the current user (-u) │ 55273 │ 55273 │
│ 13 │ Maximum amount of virtual memory available to each process (kB, -v) │ unlimited │ unlimited │
│ 14 │ Maximum number of file locks (-x) │ unlimited │ unlimited │
│ 15 │ Maximum contiguous realtime CPU time (-y) │ unlimited │ unlimited │
╰────┴──────────────────────────────────────────────────────────────────────────┴───────────┴───────────╯
nushell on ulimit is 📦 v0.88.2 via 🦀 v1.72.1
❯ ulimit -s
╭───┬─────────────────────────────┬──────┬───────────╮
│ # │ description │ soft │ hard │
├───┼─────────────────────────────┼──────┼───────────┤
│ 0 │ Maximum stack size (kB, -s) │ 8192 │ unlimited │
╰───┴─────────────────────────────┴──────┴───────────╯
nushell on ulimit is 📦 v0.88.2 via 🦀 v1.72.1
❯ ulimit -s 100
nushell on ulimit is 📦 v0.88.2 via 🦀 v1.72.1
❯ ulimit -s
╭───┬─────────────────────────────┬──────┬──────╮
│ # │ description │ soft │ hard │
├───┼─────────────────────────────┼──────┼──────┤
│ 0 │ Maximum stack size (kB, -s) │ 100 │ 100 │
╰───┴─────────────────────────────┴──────┴──────╯
nushell on ulimit is 📦 v0.88.2 via 🦀 v1.72.1
```
# Tests + Formatting
- [x] add commands::ulimit::limit_set_soft1
- [x] add commands::ulimit::limit_set_soft2
- [x] add commands::ulimit::limit_set_hard1
- [x] add commands::ulimit::limit_set_hard2
- [x] add commands::ulimit::limit_set_invalid1
- [x] add commands::ulimit::limit_set_invalid2
- [x] `cargo fmt --all -- --check` to check standard code formatting
(`cargo fmt --all` applies these changes)
- [x] `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used`
to check that you're using the standard code style
- [x] `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))
- [x] `cargo run -- -c "use std testing; testing run-tests --path
crates/nu-std"` to run the tests for the standard library
# Description
This updates all the positional arguments (except with
`--features=dataframe` or `--features=extra`) to start with an uppercase
letter and end with a period.
Part of #5066, specifically [this
comment](/nushell/nushell/issues/5066#issuecomment-1421528910)
Some arguments had example data removed from them because it also
appears in the examples.
There are other inconsistencies in positional arguments I noticed while
making the tests pass which I will bring up in #5066.
# User-Facing Changes
Positional arguments are now consistent
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
Automatic documentation updates
# Description
This repeats #8268 to make all command usage strings start with an
uppercase letter and end with a period per #5056
Adds a test to ensure that commands won't regress
Part of #5066
# User-Facing Changes
Command usage is now consistent
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
Automatic documentation updates
# Description
This PR addresses #11204 which points out that using a closure for the
replacement value with `update`, `insert`, or `upsert` does not work for
lists.
# User-Facing Changes
- Replacement closures should now work for lists in `upsert`, `insert`,
and `update`. E.g., `[0] | update 0 {|i| $i + 1 }` now gives `[1]`
instead of an unhelpful error.
- `[1 2] | insert 4 20` no longer works. Before, this would give `[1, 2,
null, null, 20]`, but now it gives an error. This was done to match the
intended behavior in `Value::insert_data_at_cell_path`, whereas the
behavior before was probably unintentional. Following
`Value::insert_data_at_cell_path`, inserting at the end of a list is
also fine, so the valid indices for `upsert` and `insert` are
`0..=length` just like `Vec::insert` or list inserts in other languages.
# Tests + Formatting
Added tests for `upsert`, `insert`, and `update`:
- Replacement closures for lists, list streams, records, and tables
- Other list stream tests
Allow `++=` to work in all situations `++` does, namely for appending
single elements: `$list ++= 1`.
Resolve#11087
# Description
Bring `++=` to parity with `++`.
# User-Facing Changes
It is now possible to do `$list ++= 1` (appending a single element).
Similarly, this can be done:
```Nushell
~> mut a = [1]
~> $a ++= 2
~> a
╭───┬───╮
│ 0 │ 1 │
│ 1 │ 2 │
╰───┴───╯
```
# Tests + Formatting
Added two tests:
- `commands::assignment::append_assign::append_assign_single_element`
- `commands::assignment::append_assign::append_assign_to_single_element`
# Description
Fixes: #11143
# User-Facing Changes
Take the following as example:
```nushell
module foo { export def bar [] {}; export def baz [] {} }
```
`use foo bar baz` will be error:
```
❯ use foo c d
Error: nu::parser::wrong_import_pattern
× Wrong import pattern structure.
╭─[entry #2:1:1]
1 │ use foo c d
· ┬
· ╰── Trying to import something but the parent `c` is not a module, maybe you want to try `use <module> [<name1>, <name2>]`
╰────
```
# Tests + Formatting
Done
# Description
This PR adds checks for ports. This fixes unexpected output similar to
the one in the comment
https://github.com/nushell/nushell/pull/11210#issuecomment-1837152357.
* before
```console
/data/source/nushell> port 65536 99999
41233
```
* after
```console
/data/source/nushell> port 65536 99999
Error: nu:🐚:cant_convert
× Can't convert to u16.
╭─[entry #1:1:1]
1 │ port 65536 99999
· ──┬──
· ╰── can't convert usize to u16
╰────
help: out of range integral type conversion attempted (min: 0, max: 65535)
```
# User-Facing Changes
N/A
# Tests + Formatting
* [x] add `port_out_of_range` test
# After Submitting
N/A
# Description
Fixes issue #11212 where only the first cellpath supplied to `get -i` is
treated as optional, and the rest of the cell paths are treated as
non-optional.
# Tests
Added one test.
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# Description
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guide](../CONTRIBUTING.md) and talk to the core team before making major
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Try to fix capacity overflow caused by large range of ports.
```
$ port 1024 999999999999999999 12/02/23 20:03:14 PM
thread 'main' panicked at 'capacity overflow', library/alloc/src/raw_vec.rs:524:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
```
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
# Tests + Formatting
<!--
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Make sure you've run and fixed any issues with these commands:
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- `cargo run -- -c "use std testing; testing run-tests --path
crates/nu-std"` to run the tests for the standard library
> **Note**
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> ```
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# After Submitting
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# Description
Fixes: #11153
To make sure scripts stop from running on non-zero exit code, we need to
invoke `might_consume_external_result` on
`PipelineData::ExternalStream`, so it can tell nushell if this command
exists with non-zero exit code.
And this pr also adjusts some test cases.
# User-Facing Changes
```nushell
^false out> /dev/null; print "ok"
```
After this pr, it shouldn't print ok.
# Tests + Formatting
Done
# Description
This PR implements modifications to command tests that write unnecessary
json and csv to disk then load it with open, by using nuon literals
instead.
- Fixes#7189
# User-Facing Changes
None
# Tests + Formatting
This only affects existing tests, which still pass.
# Description
We have seen some test cases which requires to output message to both
stdout and stderr, especially in redirection scenario.
This pr is going to introduce a new echo_env_mixed testbin, so we can
have less tests which only runs on windows.
# User-Facing Changes
NaN
# Tests + Formatting
NaN
# After Submitting
NaN
# Description
Close: #10278
This pr introduces `o>>`, `e>>`, `o+e>>` to allow redirection to append
to a file.
Examples:
```nushell
echo abc o>> a.txt
echo abc o>> a.txt
cat asdf e>> a.txt
cat asdf e>> a.txt
cat asdf o+e>> a.txt
```
~~TODO:~~
~~1. currently internal commands with `o+e>` redirect to a variable is
broken: `let x = "a.txt"; echo abc o+e> $x`, not sure when it was
introduced...~~
~~2. redirect stdout and stderr with append mode doesn't supported yet:
`cat asdf o>>a.txt e>>b.ext`~~
~~For these 2 items, I'd like to fix them in different prs.~~
Already done in this pr
# Description
This PR addresses issue with cp brough up on
[discord](https://discord.com/channels/601130461678272522/614593951969574961/1177669443917189130)
where target of cp is not correctly expanded.
If one has directory `test` with file `file.txt` in it then the
following command (in one line or inside a `do` block):
```nu
cd test; let file = 'copy.txt'; cp file.txt $file
```
will create a `copy.txt` in `.` not in `test` instead. This happens
because target of `cp` is a variable which is not expanded unlike a
string literal
# User-Facing Changes
`cp` will correctly parse realative target paths
# Tests + Formatting
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# After Submitting
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# Description
Fixes: #10271
Given the following script:
```shell
# test.sh
echo aaaaa
echo bbbbb 1>&2
echo cc
```
This pr makes the following command possible:
```nushell
bash test.sh err> /dev/null | lines | each {|line| $line | str length}
```
## General idea behind the change:
When nushell redirect stderr message to external file
1. it take stdout of external stream, and pass this stream to next
command, so it won't block next pipeline command from running.
2. relative stderr stream are handled by `save` command
These two streams are handled separately, so we need to delegate a
thread to `save` command, or else we'll have a chance to hang nushell,
we have meet a similar before: #5625.
### One case to consider
What if we're failed to save to an external stream? (Like we don't have
a permission to save to a file)?
In this case nushell will just print a waning message, and don't stop
the following scripts from running.
# User-Facing Changes
## Before
```nushell
❯ bash test2.sh err> /dev/null | lines | each {|line| $line | str length}
aaaaa
cc
```
## After
```nushell
❯ bash test2.sh err> /dev/null | lines | each {|line| $line | str length}
╭───┬───╮
│ 0 │ 5 │
│ 1 │ 2 │
╰───┴───╯
```
BTY, after this pr, the following commands are impossible either, it's
important to make sure that the implementation doesn't introduce too
much costs:
```nushell
❯ echo a e> a.txt e> a.txt
Error: × Can't make stderr redirection twice
╭─[entry #1:1:1]
1 │ echo a e> a.txt e> a.txt
· ─┬
· ╰── try to remove one
╰────
❯ echo a o> a.txt o> a.txt
Error: × Can't make stdout redirection twice
╭─[entry #2:1:1]
1 │ echo a o> a.txt o> a.txt
· ─┬
· ╰── try to remove one
╰────
```
# Description
I'm not sure if "is-terminal" is the best name for this command as there
is also "term size". Uses
[`is_terminal()`](https://doc.rust-lang.org/stable/std/io/trait.IsTerminal.html#tymethod.is_terminal)
which is cross-platform.
Possible alternative names:
* `term is-tty --stdout`
* `term is-tty stdout`
* `term is-terminal stdout`
If multiple streams are provided an error is returned. The error span
covers all arguments as the incompatible one is not known. This may be
new?
Fixes#10517
# User-Facing Changes
* Add `is-terminal` to check if stdin, stdout, or stderr are a terminal
(TTY)
# Tests + Formatting
The nu tests always redirect stdin, stdout, and stderr so a positive
test case is not possible without extra work
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
The new command will be added automatically
---------
Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>
# Description
Slightly refactors the cell path functions (`insert_data_at_cell_path`,
etc.) for `Value` to fix a few bugs and ensure consistent behavior.
Namely, case (in)sensitivity now applies to lazy records just like it
does for regular `Records`. Also, the insert behavior of `insert` and
`upsert` now match, alongside fixing a few related bugs described below.
Otherwise, a few places were changed to use the `Record` API.
# Tests
Added tests for two bugs:
- `{a: {}} | insert a.b.c 0`: before this PR, doesn't create the
innermost record `c`.
- `{table: [[col]; [{a: 1}], [{a: 1}]]} | insert table.col.b 2`: before
this PR, doesn't add the field `b: 2` to each row.
closes#10845
I've opened this a little prematurely to get some questions answered
before I cleanup the code.
As I started trying to better understand GNUs `mktemp` I've realized its
kind of peculiar and we might want to change its behavior to introduce
it to nushell.
#### quiet and dry run
Does it make sense to keep the `quiet` and `dry_run` flags? I don't
think so. The GNU documentation says this about the dry run flag "Using
the output of this command to create a new file is inherently unsafe, as
there is a window of time between generating the name and using it where
another process can create an object by the same name." So yeah why keep
it? As far as quiet goes, does it make sense to silence the errors in
nushell?
#### other confusing flags
According to the [gnu
docs](https://www.gnu.org/software/coreutils/manual/html_node/mktemp-invocation.html),
the `-t` flag is deprecated and the `-p`/ `--tempdir` are the same flag
with the only difference being `--tempdir` takes an optional path, Given
that, I've broken the `-p` away from `--tempdir`. Now there is one
switch `--tmpdir`/`-t` and one named param `--tmpdir-path`/`-p`.
GNU mktemp
```
-p DIR, --tmpdir[=DIR] interpret TEMPLATE relative to DIR; if DIR is not
specified, use $TMPDIR if set, else /tmp. With
this option, TEMPLATE must not be an absolute name;
unlike with -t, TEMPLATE may contain slashes, but
mktemp creates only the final component
-t interpret TEMPLATE as a single file name component,
relative to a directory: $TMPDIR, if set; else the
directory specified via -p; else /tmp [deprecated]
```
to
nushell mktemp
```
-p, --tmpdir-path <Filepath> # named param, must provide a path
-t, --tmpdir # a switch
```
Is this a terrible idea?
What should I do?
---------
Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>
# Description
Fixes issue #11061 where `rm` fails to find a file after a `cd`. It
looks like the new glob functions do not return absolute file paths
which we forgot to account for.
# Tests
Added a test (fails on current main, but passes with this PR).
---------
Co-authored-by: Jakub Žádník <kubouch@gmail.com>
follow-up to:
- https://github.com/nushell/nushell/pull/10771
> **Important**
> wait for between 0.87 and 0.88 to land this
# Description
after deprecation comes the removal... this PR removes `unfold` in favor
of `generate` 🥳
# User-Facing Changes
users should use `generate` now, `unfold` will stop working.
# Tests + Formatting
# After Submitting
follow-up to
- https://github.com/nushell/nushell/pull/10798
> **Important**
> wait for between 0.87 and 0.88 to land this
# Description
once again, after deprecation comes removal 😌
# User-Facing Changes
`size` is now removed and `str size` should be used
# Tests + Formatting
# After Submitting
# Description
This PR follows our process of staying 2 releases behind rust. 1.74.0
was released today so we update to 1.72.1.
Reference https://releases.rs/
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
# Tests + Formatting
<!--
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Make sure you've run and fixed any issues with these commands:
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# After Submitting
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# Description
This PR refactors `drop columns` and fixes issues #10902 and #6846.
Tables with "holes" are now handled consistently, although still
somewhat awkwardly. That is, the columns in the first row are used to
determine which columns to drop, meaning that the columns displayed all
the way to the right by `table` may not be the columns actually being
dropped. For example, `[{a: 1}, {b: 2}] | drop column` will drop column
`a` instead of `b`. Before, this would give a list of empty records.
# User-Facing Changes
`drop columns` can now take records as input.
# Description
Based of the work and discussion in #10844, this PR adds the `exec`
command for Windows. This is done by simply spawning a
`std::process::Command` and then immediately exiting via
`std::process::exit` once the child process is finished. The child
process's exit code is passed to `exit`.
# User-Facing Changes
The `exec` command is now available on Windows, and there should be no
change in behaviour for Unix systems.
# Description
`split-by` only works on a `Record`, the error type was updated to
match, and now uses a more-specific type. (Two type fixes for the price
of one!)
The `usage` was updated to say "record" as well
# User-Facing Changes
* Providing the wrong type to `split-by` now gives an error messages
with the correct required input type
Previously:
```
❯ ls | get name | split-by type
Error: × unsupported input
╭─[entry #267:1:1]
1 │ ls | get name | split-by type
· ─┬─
· ╰── requires a table with one row for splitting
╰────
```
With this PR:
```
❯ ls | get name | split-by type
Error: nu:🐚:type_mismatch
× Type mismatch.
╭─[entry #1:1:1]
1 │ ls | get name | split-by type
· ─┬─
· ╰── requires a record to split
╰────
```
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
# After Submitting
Only generated commands need to be updated
---------
Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>
# Description
Limit the test `-p nu-command --test main
commands::run_external::redirect_combine` which uses `sh` to running on
`not(Windows)` like is done for other tests assuming unixy CLI items;
`sh` doesn't exist on Windows.
# User-Facing Changes
None; this is a change to tests only.
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- 🟢 `toolkit test`
- 🟢 `toolkit test stdlib`
- Replaced `start`/`end` with span.
- Fixed standard library.
- Add `help` option.
- Add a couple more errors for invalid record types.
Resolve#10914
# Description
# User-Facing Changes
- **BREAKING CHANGE:** `error make` now takes in `span` instead of
`start`/`end`:
```Nushell
error make {
msg: "Message"
label: {
text: "Label text"
span: (metadata $var).span
}
}
```
- `error make` now has a `help` argument for custom error help.
# Description
Pretty much all operations/commands in Nushell assume that the column
names/keys in a record and thus also in a table (which consists of a
list of records) are unique.
Access through a string-like cell path should refer to a single column
or key/value pair and our output through `table` will only show the last
mention of a repeated column name.
```nu
[[a a]; [1 2]]
╭─#─┬─a─╮
│ 0 │ 2 │
╰───┴───╯
```
While the record parsing already either errors with the
`ShellError::ColumnDefinedTwice` or silently overwrites the first
occurence with the second occurence, the table literal syntax `[[header
columns]; [val1 val2]]` currently still allowed the creation of tables
(and internally records with more than one entry with the same name.
This is not only confusing, but also breaks some assumptions around how
we can efficiently perform operations or in the past lead to outright
bugs (e.g. #8431 fixed by #8446).
This PR proposes to make this an error.
After this change another hole which allowed the construction of records
with non-unique column names will be plugged.
## Parts
- Fix `SE::ColumnDefinedTwice` error code
- Remove previous tests permitting duplicate columns
- Deny duplicate column in table literal eval
- Deny duplicate column in const eval
- Deny duplicate column in `from nuon`
# User-Facing Changes
`[[a a]; [1 2]]` will now return an error:
```
Error: nu:🐚:column_defined_twice
× Record field or table column used twice
╭─[entry #2:1:1]
1 │ [[a a]; [1 2]]
· ┬ ┬
· │ ╰── field redefined here
· ╰── field first defined here
╰────
```
this may under rare circumstances block code from evaluating.
Furthermore this makes some NUON files invalid if they previously
contained tables with repeated column names.
# Tests + Formatting
Added tests for each of the different evaluation paths that materialize
tables.
# Description
as we can see in the [documentation of
`str.to_lowercase`](https://doc.rust-lang.org/std/primitive.str.html#method.to_lowercase),
not only ASCII symbols have lower and upper variants.
- `str upcase` uses the correct method to convert the string
7ac5a01e2f/crates/nu-command/src/strings/str_/case/upcase.rs (L93)
- `str downcase` incorrectly converts only ASCII characters
7ac5a01e2f/crates/nu-command/src/strings/str_/case/downcase.rs (L124)
this PR uses `str.to_lower_case` instead of `str.to_ascii_lowercase` in
`str downcase`.
# User-Facing Changes
- upcase still works fine
```nushell
~ l> "ὀδυσσεύς" | str upcase
ὈΔΥΣΣΕΎΣ
```
- downcase now works
👉 before
```nushell
~ l> "ὈΔΥΣΣΕΎΣ" | str downcase
ὈΔΥΣΣΕΎΣ
```
👉 after
```nushell
~ l> "ὈΔΥΣΣΕΎΣ" | str downcase
ὀδυσσεύς
```
# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- ⚫ `toolkit test`
- ⚫ `toolkit test stdlib`
adds two tests
- `non_ascii_upcase`
- `non_ascii_downcase`
# After Submitting
# Description
Currently the following command is broken:
```nushell
echo a o+e> 1.txt
```
It's because we don't redirect output of `echo` command. This pr is
trying to fix it.
# Description
- this PR should close#10819
# User-Facing Changes
Behaviour is similar to pre 0.86.0 behaviour of the cp command and
should as such not have a user-facing change, only compared to the
current version, were the option is readded.
# After Submitting
I guess the documentation will be automatically updated and as this
feature is no further highlighted, probably, no more work will be needed
here.
# Considerations
coreutils actually allows a third option:
```
pub enum UpdateMode {
// --update=`all`,
ReplaceAll,
// --update=`none`
ReplaceNone,
// --update=`older`
// -u
ReplaceIfOlder,
}
```
namely `ReplaceNone`, which I have not added. Also I think that
specifying `--update 'abc'` is non functional.
# Description
Fixes: #10830
The issue happened during lite-parsing, when we want to put a
`LiteElement` to a `LitePipeline`, we do nothing if relative redirection
target is empty.
So the command `echo aaa o> | ignore` will be interpreted to `echo aaa |
ignore`.
This pr is going to check and return an error if redirection target is
empty.
# User-Facing Changes
## Before
```
❯ echo aaa o> | ignore # nothing happened
```
## After
```nushell
❯ echo aaa o> | ignore
Error: nu::parser::parse_mismatch
× Parse mismatch during operation.
╭─[entry #1:1:1]
1 │ echo aaa o> | ignore
· ─┬
· ╰── expected redirection target
╰────
```
# Description
Support pattern matching against the `null` literal. Fixes#10799
### Before
```nushell
> match null { null => "success", _ => "failure" }
failure
```
### After
```nushell
> match null { null => "success", _ => "failure" }
success
```
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
Users can pattern match against a `null` literal.
# Description
`from tsv` and `from csv` both support a `--flexible` flag. This flag
can be used to "allow the number of fields in records to be variable".
Previously, a record's invariant that `rec.cols.len() == rec.vals.len()`
could be broken during parsing. This can cause runtime errors as in
#10693. Other commands, like `select` were also affected.
The inconsistencies are somewhat hard to see, as most nushell code
assumes an equal number of columns and values.
# Before
### Fewer values than columns
```nushell
> let record = (echo "one,two\n1" | from csv --flexible | first)
# There are two columns
> $record | columns | to nuon
[one, two]
# But only one value
> $record | values | to nuon
[1]
# And printing the record doesn't show the second column!
> $record | to nuon
{one: 1}
```
### More values than columns
```nushell
> let record = (echo "one,two\n1,2,3" | from csv --flexible | first)
# There are two columns
> $record | columns | to nuon
[one, two]
# But three values
> $record | values | to nuon
[1, 2, 3]
# And printing the record doesn't show the third value!
> $record | to nuon
{one: 1, two: 2}
```
# After
### Fewer values than columns
```nushell
> let record = (echo "one,two\n1" | from csv --flexible | first)
# There are two columns
> $record | columns | to nuon
[one, two]
# And a matching number of values
> $record | values | to nuon
[1, null]
# And printing the record works as expected
> $record | to nuon
{one: 1, two: null}
```
### More values than columns
```nushell
> let record = (echo "one,two\n1,2,3" | from csv --flexible | first)
# There are two columns
> $record | columns | to nuon
[one, two]
# And a matching number of values
> $record | values | to nuon
[1, 2]
# And printing the record works as expected
> $record | to nuon
{one: 1, two: 2}
```
# User-Facing Changes
Using the `--flexible` flag with `from csv` and `from tsv` will not
result in corrupted record state.
# 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 std testing; testing run-tests --path
crates/nu-std"` 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
> ```
-->
# After Submitting
<!-- If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
-->
related to
- https://github.com/nushell/nushell/pull/10770
# Description
because some people look into `unfold` already (myself included lol) and
there will be 4 weeks with that new command which has a decent section
in the release note, i fear that
https://github.com/nushell/nushell/pull/10770 is a bit too brutal,
removing `unfold` without any warning...
this PR brings `unfold` back to life.
the `unfold` command will have a deprecation warning and will be removed
in 0.88.
# User-Facing Changes
`unfold` is only deprecated, not removed.
# Tests + Formatting
# After Submitting
# Description
This PR renames the `unfold` command to `generate`.
closes#10760
# User-Facing Changes
<!-- List of all changes that impact the user experience here. This
helps us keep track of breaking changes. -->
# 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 std testing; testing run-tests --path
crates/nu-std"` 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
> ```
-->
# After Submitting
<!-- If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.
-->
# Description
Changed `group-by` behavior to accept empty list as input and return an
empty record instead of throwing an error. I also replaced
`errors_if_input_empty()` test to reflect the new expected behavior.
See #10713
# User-Facing Changes
`[] | group-by` or `[] | group-by a` now returns empty record
# Tests + Formatting
1 test for emptied table i.e. list
---------
Signed-off-by: Oscar <71343264+0scvr@users.noreply.github.com>
Add `--ignore-errors` flag to reject.
This is a PR in reference to #10215 as select has the flag, but reject
hasn't
user can now add `-i` or `--ignore-errors` flag to turn every cell path
into option.
```nushell
> let arg = [0 5 a c]
> [[a b];[1 2] [3 4] [5 6]] | reject $a | to nuon
error index to large
# ----
> let arg = [0 5 a c]
> [[a b];[1 2] [3 4] [5 6]] | reject $a -i | to nuon
[[a, b]; [1, 2], [3, 4], [5, 6]]
```
