forked from extern/nushell
47 lines
1.4 KiB
Rust
47 lines
1.4 KiB
Rust
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use crate::prelude::*;
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use std::collections::BTreeMap;
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use std::error::Error;
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pub type Commands = BTreeMap<String, Box<dyn crate::CommandBlueprint>>;
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pub struct Context {
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commands: BTreeMap<String, Box<dyn crate::CommandBlueprint>>,
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crate host: Box<dyn crate::Host>,
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crate env: Environment,
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}
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impl Context {
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crate fn basic() -> Result<Context, Box<Error>> {
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Ok(Context {
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commands: BTreeMap::new(),
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host: Box::new(crate::env::host::BasicHost),
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env: crate::Environment::basic()?,
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})
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}
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pub fn add_commands(&mut self, commands: Vec<(&str, Box<dyn crate::CommandBlueprint>)>) {
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for (name, command) in commands {
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self.commands.insert(name.to_string(), command);
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}
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}
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crate fn get_command(&mut self, name: &str) -> Option<&dyn crate::CommandBlueprint> {
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self.commands.get(name).map(|c| &**c)
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}
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crate fn has_command(&mut self, name: &str) -> bool {
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self.commands.contains_key(name)
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}
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crate fn create_command(
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&mut self,
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name: &str,
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arg_list: Vec<Value>,
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) -> Result<Box<dyn Command>, ShellError> {
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match self.commands.get(name) {
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Some(command) => Ok(command.create(arg_list, &self.host, &mut self.env)?),
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None => Err(ShellError::string(format!("Missing command {}", name))),
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}
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}
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}
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