forked from extern/nushell
55 lines
1.5 KiB
Rust
55 lines
1.5 KiB
Rust
use nu_protocol::ast::Call;
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use nu_protocol::engine::{Command, EngineState, Stack};
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use nu_protocol::{Category, Example, PipelineData, Signature, SyntaxShape};
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#[derive(Clone)]
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pub struct Alias;
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impl Command for Alias {
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fn name(&self) -> &str {
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"alias"
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}
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fn usage(&self) -> &str {
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"Alias a command (with optional flags) to a new name"
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}
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fn signature(&self) -> nu_protocol::Signature {
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Signature::build("alias")
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.required("name", SyntaxShape::String, "name of the alias")
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.required(
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"initial_value",
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SyntaxShape::Keyword(b"=".to_vec(), Box::new(SyntaxShape::Expression)),
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"equals sign followed by value",
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)
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.category(Category::Core)
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}
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fn extra_usage(&self) -> &str {
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r#"This command is a parser keyword. For details, check
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https://www.nushell.sh/book/thinking_in_nushell.html#parsing-and-evaluation-are-different-stages"#
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}
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fn is_parser_keyword(&self) -> bool {
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true
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}
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fn run(
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&self,
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_engine_state: &EngineState,
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_stack: &mut Stack,
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call: &Call,
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_input: PipelineData,
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) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
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Ok(PipelineData::new(call.head))
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Alias ll to ls -l",
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example: "alias ll = ls -l",
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result: None,
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}]
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}
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}
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