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nushell/src/context.rs

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Rust
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use crate::prelude::*;
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use std::error::Error;
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use std::sync::Arc;
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pub struct Context {
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commands: indexmap::IndexMap<String, Arc<dyn Command>>,
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crate host: Arc<Mutex<dyn Host + Send>>,
crate env: Arc<Mutex<Environment>>,
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}
impl Context {
crate fn basic() -> Result<Context, Box<Error>> {
Ok(Context {
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commands: indexmap::IndexMap::new(),
host: Arc::new(Mutex::new(crate::env::host::BasicHost)),
env: Arc::new(Mutex::new(Environment::basic()?)),
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})
}
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pub fn add_commands(&mut self, commands: Vec<(&str, Arc<dyn Command>)>) {
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for (name, command) in commands {
self.commands.insert(name.to_string(), command);
}
}
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crate fn has_command(&self, name: &str) -> bool {
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self.commands.contains_key(name)
}
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crate fn get_command(&self, name: &str) -> Arc<dyn Command> {
self.commands.get(name).unwrap().clone()
}
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crate fn run_command(
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&mut self,
command: Arc<dyn Command>,
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arg_list: Vec<Value>,
input: InputStream,
) -> Result<OutputStream, ShellError> {
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let command_args = CommandArgs {
host: self.host.clone(),
env: self.env.clone(),
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args: arg_list,
input,
};
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command.run(command_args)
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}
}