forked from extern/nushell
522a828687
* Refactor InputStream and affected commands. First, making `values` private and leaning on the `Stream` implementation makes consumes of `InputStream` less likely to have to change in the future, if we change what an `InputStream` is internally. Second, we're dropping `Option<InputStream>` as the input to pipelines, internals, and externals. Instead, `InputStream.is_empty` can be used to check for "emptiness". Empty streams are typically only ever used as the first input to a pipeline. * Add run_external internal command. We want to push external commands closer to internal commands, eventually eliminating the concept of "external" completely. This means we can consolidate a couple of things: - Variable evaluation (for example, `$it`, `$nu`, alias vars) - Behaviour of whole stream vs per-item external execution It should also make it easier for us to start introducing argument signatures for external commands, * Update run_external.rs * Update run_external.rs * Update run_external.rs * Update run_external.rs Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
use crate::commands::WholeStreamCommand;
|
|
use crate::prelude::*;
|
|
use nu_errors::ShellError;
|
|
use nu_protocol::{Signature, TaggedDictBuilder, UntaggedValue};
|
|
|
|
pub struct Tags;
|
|
|
|
impl WholeStreamCommand for Tags {
|
|
fn name(&self) -> &str {
|
|
"tags"
|
|
}
|
|
|
|
fn signature(&self) -> Signature {
|
|
Signature::build("tags")
|
|
}
|
|
|
|
fn usage(&self) -> &str {
|
|
"Read the tags (metadata) for values."
|
|
}
|
|
|
|
fn run(
|
|
&self,
|
|
args: CommandArgs,
|
|
registry: &CommandRegistry,
|
|
) -> Result<OutputStream, ShellError> {
|
|
tags(args, registry)
|
|
}
|
|
}
|
|
|
|
fn tags(args: CommandArgs, _registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
|
|
Ok(args
|
|
.input
|
|
.map(move |v| {
|
|
let mut tags = TaggedDictBuilder::new(v.tag());
|
|
{
|
|
let anchor = v.anchor();
|
|
let span = v.tag.span;
|
|
let mut dict = TaggedDictBuilder::new(v.tag());
|
|
dict.insert_untagged("start", UntaggedValue::int(span.start() as i64));
|
|
dict.insert_untagged("end", UntaggedValue::int(span.end() as i64));
|
|
tags.insert_value("span", dict.into_value());
|
|
|
|
match anchor {
|
|
Some(AnchorLocation::File(source)) => {
|
|
tags.insert_untagged("anchor", UntaggedValue::string(source));
|
|
}
|
|
Some(AnchorLocation::Url(source)) => {
|
|
tags.insert_untagged("anchor", UntaggedValue::string(source));
|
|
}
|
|
_ => {}
|
|
}
|
|
}
|
|
|
|
tags.into_value()
|
|
})
|
|
.to_output_stream())
|
|
}
|