forked from extern/nushell
48 lines
1.0 KiB
Rust
48 lines
1.0 KiB
Rust
use crate::errors::ShellError;
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use crate::object::Value;
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use crate::prelude::*;
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use std::path::PathBuf;
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pub struct CommandArgs<'caller> {
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pub host: &'caller dyn Host,
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pub env: &'caller crate::Environment,
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pub args: Vec<Value>,
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pub input: VecDeque<Value>,
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}
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pub trait CommandBlueprint {
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fn create(
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&self,
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input: Vec<Value>,
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host: &dyn crate::Host,
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env: &mut crate::Environment,
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) -> Result<Box<dyn Command>, ShellError>;
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}
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#[derive(Debug)]
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pub enum CommandAction {
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ChangeCwd(PathBuf),
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}
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#[derive(Debug)]
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pub enum ReturnValue {
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Value(Value),
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Action(CommandAction),
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}
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impl ReturnValue {
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crate fn single(value: Value) -> VecDeque<ReturnValue> {
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let mut v = VecDeque::new();
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v.push_back(ReturnValue::Value(value));
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v
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}
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crate fn change_cwd(path: PathBuf) -> ReturnValue {
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ReturnValue::Action(CommandAction::ChangeCwd(path))
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}
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}
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pub trait Command {
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fn run(&self, args: CommandArgs<'caller>) -> Result<VecDeque<ReturnValue>, ShellError>;
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}
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