b2c5af457e
This improves incremental build time when working on what was previously the root package. For example, previously all plugins would be rebuilt with a change to `src/commands/classified/external.rs`, but now only `nu-cli` will have to be rebuilt (and anything that depends on it).
68 lines
1.8 KiB
Rust
68 lines
1.8 KiB
Rust
use crate::prelude::*;
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use nu_errors::ShellError;
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use nu_protocol::{CallInfo, ReturnSuccess, Signature, SyntaxShape, UntaggedValue, Value};
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pub struct Echo;
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impl PerItemCommand for Echo {
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fn name(&self) -> &str {
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"echo"
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}
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fn signature(&self) -> Signature {
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Signature::build("echo").rest(SyntaxShape::Any, "the values to echo")
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}
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fn usage(&self) -> &str {
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"Echo the arguments back to the user."
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}
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fn run(
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&self,
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call_info: &CallInfo,
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registry: &CommandRegistry,
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raw_args: &RawCommandArgs,
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_input: Value,
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) -> Result<OutputStream, ShellError> {
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run(call_info, registry, raw_args)
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}
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}
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fn run(
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call_info: &CallInfo,
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_registry: &CommandRegistry,
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_raw_args: &RawCommandArgs,
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) -> Result<OutputStream, ShellError> {
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let mut output = vec![];
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if let Some(ref positional) = call_info.args.positional {
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for i in positional {
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match i.as_string() {
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Ok(s) => {
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output.push(Ok(ReturnSuccess::Value(
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UntaggedValue::string(s).into_value(i.tag.clone()),
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)));
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}
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_ => match i {
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Value {
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value: UntaggedValue::Table(table),
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..
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} => {
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for value in table {
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output.push(Ok(ReturnSuccess::Value(value.clone())));
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}
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}
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_ => {
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output.push(Ok(ReturnSuccess::Value(i.clone())));
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}
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},
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}
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}
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}
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// TODO: This whole block can probably be replaced with `.map()`
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let stream = futures::stream::iter(output);
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Ok(stream.to_output_stream())
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}
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