forked from extern/nushell
60 lines
2.9 KiB
Rust
60 lines
2.9 KiB
Rust
use crate::Example;
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use nu_plugin::{EvaluatedCall, LabeledError, Plugin};
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use nu_protocol::{Category, Signature, SyntaxShape, Value};
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impl Plugin for Example {
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fn signature(&self) -> Vec<Signature> {
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// It is possible to declare multiple signature in a plugin
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// Each signature will be converted to a command declaration once the
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// plugin is registered to nushell
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vec![
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Signature::build("nu-example-1")
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.desc("Signature test 1 for plugin. Returns Value::Nothing")
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.required("a", SyntaxShape::Int, "required integer value")
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.required("b", SyntaxShape::String, "required string value")
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.switch("flag", "a flag for the signature", Some('f'))
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.optional("opt", SyntaxShape::Int, "Optional number")
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.named("named", SyntaxShape::String, "named string", Some('n'))
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.rest("rest", SyntaxShape::String, "rest value string")
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.category(Category::Experimental),
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Signature::build("nu-example-2")
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.desc("Signature test 2 for plugin. Returns list of records")
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.required("a", SyntaxShape::Int, "required integer value")
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.required("b", SyntaxShape::String, "required string value")
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.switch("flag", "a flag for the signature", Some('f'))
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.optional("opt", SyntaxShape::Int, "Optional number")
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.named("named", SyntaxShape::String, "named string", Some('n'))
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.rest("rest", SyntaxShape::String, "rest value string")
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.category(Category::Experimental),
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Signature::build("nu-example-3")
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.desc("Signature test 3 for plugin. Returns labeled error")
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.required("a", SyntaxShape::Int, "required integer value")
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.required("b", SyntaxShape::String, "required string value")
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.switch("flag", "a flag for the signature", Some('f'))
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.optional("opt", SyntaxShape::Int, "Optional number")
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.named("named", SyntaxShape::String, "named string", Some('n'))
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.rest("rest", SyntaxShape::String, "rest value string")
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.category(Category::Experimental),
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]
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}
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fn run(
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&mut self,
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name: &str,
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call: &EvaluatedCall,
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input: &Value,
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) -> Result<Value, LabeledError> {
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// You can use the name to identify what plugin signature was called
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match name {
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"nu-example-1" => self.test1(call, input),
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"nu-example-2" => self.test2(call, input),
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"nu-example-3" => self.test3(call, input),
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_ => Err(LabeledError {
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label: "Plugin call with wrong name signature".into(),
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msg: "the signature used to call the plugin does not match any name in the plugin signature vector".into(),
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span: Some(call.head),
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}),
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}
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}
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}
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