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# Description
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This PR adds the `only` command to `std-rfc/iter`, which is a command I
wrote a while ago that I've found so useful that I think it could have a
place in the standard library. It acts similarly to `get 0`, but ensures
that the value actually exists, and there aren't additional values. I
find this most useful when chained with `where`, when you want to be
certain that no additional elements are accidentally selected when you
only mean to get a single element.
I'll copy the help page here for additional explanation:
> Get the only element of a list or table, ensuring it exists and there
are no extra elements.
>
> Similar to `first` with no arguments, but errors if there are no
additional
> items when there should only be one item. This can help avoid issues
when more
> than one row than expected matches some criteria.
>
> This command is useful when chained with `where` to ensure that only
one row
> meets the given condition.
>
> If a cell path is provided as an argument, it will be accessed after
the first
> element. For example, `only foo` is roughly equivalent to `get 0.foo`,
with
> the guarantee that there are no additional elements.
>
> Note that this command currently collects streams.
> Examples:
>
> Get the only item in a list, ensuring it exists and there's no
additional items
> ```nushell
> [5] | only
> # => 5
> ```
>
> Get the `name` column of the only row in a table
> ```nushell
> [{name: foo, id: 5}] | only name
> # => foo
> ```
>
> Get the modification time of the file named foo.txt
> ```nushell
> ls | where name == "foo.txt" | only modified
> ```
Here's some additional examples showing the errors:
Most of the time I chain this with a simple `where`, but here's a couple
other real world examples of how I've used this:
[With `parse`, which outputs a
table](https://git.ikl.sh/132ikl/dotfiles/src/branch/main/.scripts/manage-nu#L53):
```nushell
let commit = $selection | parse "{start}.g{commit}-{end}" | only commit
```
[Ensuring that only one row in a table has a name that ends with a
certain
suffix](https://git.ikl.sh/132ikl/dotfiles/src/branch/main/.scripts/btconnect):
```nushell
$devices | where ($chosen_name ends-with $it.name) | only
```
Unfortunately to get these nice errors I had to collect the stream (and
I think the errors are more useful for this). This should be to be
mitigated with (something like) #16014.
Putting this in `std/iter` might be pushing it, but it seems *just*
close enough that I can't really justify putting it in a different/new
module.
# User-Facing Changes
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helps us keep track of breaking changes. -->
* Adds the `only` command to `std-rfc/iter`, which can be used to ensure
that a table or list only has a single element.
# Tests + Formatting
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> **Note**
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Added a few tests for `only` including error cases
# After Submitting
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N/A
---------
Co-authored-by: Bahex <Bahex@users.noreply.github.com>
Follow-up to #15877. That PR was created before 0.105, but merged after
it was released. This PR adjusts the deprecation window from
0.105.0-0.107.0 to 0.106.0-0.108.0
# Description
Promotes the clip module from `std-rfc` to `std`. Whether we want to
promote other modules as well (probably?) is up for discussion but I
thought I would get the ball rolling with this one.
# User-Facing Changes
* The `clip` module has been promoted from `std-rfc` to `std`. Using the
`std-rfc` version of clip modules will give a deprecation warning
instructing you to switch to the `std` version.
# Tests + Formatting
N/A
# After Submitting
N/A
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Fixes#15528
# Description
Fixed `kv set` passing the pipeline input to the closure instead of the
value stored in that key.
# User-Facing Changes
Now `kv set` will pass the value in that key to the closure.
# Tests + Formatting
# After Submitting
Fixes#15414 by changing the method used to de-ansi-fy the input. Control characters will now be kept when using `clip copy`, but ANSI escape codes will be removed (when not using `--ansi (-a)`)
# Description
Update some comments and fix potential security issue:
SQL Injection in DELETE statements: The code constructs SQL queries by
interpolating the $key variable directly into the string. If a key
contains malicious input could lead to SQL injection. Need to use
parameterized queries or escaping.
