forked from extern/nushell
108 lines
2.8 KiB
Rust
108 lines
2.8 KiB
Rust
use crate::commands::WholeStreamCommand;
|
|
use crate::prelude::*;
|
|
use nu_errors::ShellError;
|
|
use nu_protocol::{Signature, SyntaxShape, UntaggedValue, Value};
|
|
use nu_source::Tagged;
|
|
use nu_value_ext::get_data_by_key;
|
|
|
|
pub struct SortBy;
|
|
|
|
#[derive(Deserialize)]
|
|
pub struct SortByArgs {
|
|
rest: Vec<Tagged<String>>,
|
|
}
|
|
|
|
impl WholeStreamCommand for SortBy {
|
|
fn name(&self) -> &str {
|
|
"sort-by"
|
|
}
|
|
|
|
fn signature(&self) -> Signature {
|
|
Signature::build("sort-by").rest(SyntaxShape::String, "the column(s) to sort by")
|
|
}
|
|
|
|
fn usage(&self) -> &str {
|
|
"Sort by the given columns, in increasing order."
|
|
}
|
|
|
|
fn run(
|
|
&self,
|
|
args: CommandArgs,
|
|
registry: &CommandRegistry,
|
|
) -> Result<OutputStream, ShellError> {
|
|
sort_by(args, registry)
|
|
}
|
|
|
|
fn examples(&self) -> Vec<Example> {
|
|
vec![
|
|
Example {
|
|
description: "Sort list by increasing value",
|
|
example: "echo [4 2 3 1] | sort-by",
|
|
result: Some(vec![
|
|
UntaggedValue::int(1).into(),
|
|
UntaggedValue::int(2).into(),
|
|
UntaggedValue::int(3).into(),
|
|
UntaggedValue::int(4).into(),
|
|
]),
|
|
},
|
|
Example {
|
|
description: "Sort output by increasing file size",
|
|
example: "ls | sort-by size",
|
|
result: None,
|
|
},
|
|
Example {
|
|
description: "Sort output by type, and then by file size for each type",
|
|
example: "ls | sort-by type size",
|
|
result: None,
|
|
},
|
|
]
|
|
}
|
|
}
|
|
|
|
fn sort_by(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
|
|
let registry = registry.clone();
|
|
let stream = async_stream! {
|
|
let (SortByArgs { rest }, mut input) = args.process(®istry).await?;
|
|
let mut vec = input.drain_vec().await;
|
|
|
|
if vec.is_empty() {
|
|
return;
|
|
}
|
|
|
|
match &vec[0] {
|
|
Value {
|
|
value: UntaggedValue::Primitive(_),
|
|
..
|
|
} => {
|
|
vec.sort();
|
|
},
|
|
_ => {
|
|
let calc_key = |item: &Value| {
|
|
rest.iter()
|
|
.map(|f| get_data_by_key(item, f.borrow_spanned()))
|
|
.collect::<Vec<Option<Value>>>()
|
|
};
|
|
vec.sort_by_cached_key(calc_key);
|
|
},
|
|
};
|
|
|
|
for item in vec {
|
|
yield item.into();
|
|
}
|
|
};
|
|
|
|
Ok(stream.to_output_stream())
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::SortBy;
|
|
|
|
#[test]
|
|
fn examples_work_as_expected() {
|
|
use crate::examples::test as test_examples;
|
|
|
|
test_examples(SortBy {})
|
|
}
|
|
}
|