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use crate::evaluate::scope::Scope;
use crate::evaluation_context::EvaluationContext;
use crate::shell::shell_manager::ShellManager;
use crate::FromValue;
use crate::{call_info::UnevaluatedCallInfo, config_holder::ConfigHolder};
use crate::{env::host::Host, evaluate_baseline_expr};
use getset::Getters;
use nu_errors::ShellError;
use nu_protocol::hir::SpannedExpression;
use nu_source::Tag;
use nu_stream::InputStream;
use parking_lot::Mutex;
use std::sync::atomic::AtomicBool;
use std::sync::Arc;
#[derive(Getters)]
#[get = "pub"]
pub struct CommandArgs {
pub context: EvaluationContext,
pub call_info: UnevaluatedCallInfo,
pub input: InputStream,
}
impl CommandArgs {
pub fn scope(&self) -> &Scope {
&self.context.scope
}
pub fn host(&self) -> Arc<parking_lot::Mutex<Box<dyn Host>>> {
self.context.host().clone()
}
pub fn current_errors(&self) -> Arc<Mutex<Vec<ShellError>>> {
self.context.current_errors().clone()
}
pub fn ctrl_c(&self) -> Arc<AtomicBool> {
self.context.ctrl_c().clone()
}
pub fn configs(&self) -> Arc<Mutex<ConfigHolder>> {
self.context.configs().clone()
}
pub fn shell_manager(&self) -> ShellManager {
self.context.shell_manager().clone()
}
pub fn nth(&self, pos: usize) -> Option<&SpannedExpression> {
if let Some(positional) = &self.call_info.args.positional {
positional.get(pos)
} else {
None
}
}
pub fn req<T: FromValue>(&self, pos: usize) -> Result<T, ShellError> {
if let Some(expr) = self.nth(pos) {
let result = evaluate_baseline_expr(expr, &self.context)?;
FromValue::from_value(&result)
} else {
Err(ShellError::labeled_error(
"Position beyond end of command arguments",
"can't access beyond end of command arguments",
self.call_info.name_tag.span,
))
}
}
pub fn req_named<T: FromValue>(&self, name: &str) -> Result<T, ShellError> {
match self.get_flag(name)? {
Some(v) => Ok(v),
None => Err(ShellError::labeled_error(
"Missing flag",
format!("expected {} flag", name),
&self.call_info.name_tag,
)),
}
}
pub fn has_flag(&self, name: &str) -> bool {
self.call_info.args.switch_preset(name)
}
pub fn get_flag<T: FromValue>(&self, name: &str) -> Result<Option<T>, ShellError> {
if let Some(expr) = self.call_info.args.get_flag(name) {
let result = evaluate_baseline_expr(expr, &self.context)?;
FromValue::from_value(&result).map(Some)
} else {
Ok(None)
}
}
pub fn opt<T: FromValue>(&self, pos: usize) -> Result<Option<T>, ShellError> {
if let Some(expr) = self.nth(pos) {
let result = evaluate_baseline_expr(expr, &self.context)?;
FromValue::from_value(&result).map(Some)
} else {
Ok(None)
}
}
pub fn rest<T: FromValue>(&self, starting_pos: usize) -> Result<Vec<T>, ShellError> {
let mut output = vec![];
if let Some(positional) = &self.call_info.args.positional {
for expr in positional.iter().skip(starting_pos) {
let result = evaluate_baseline_expr(expr, &self.context)?;
output.push(FromValue::from_value(&result)?);
}
}
Ok(output)
}
pub fn rest_with_minimum<T: FromValue>(
&self,
pos: usize,
count: usize,
) -> Result<Vec<T>, ShellError> {
let mut output = vec![];
for i in pos..pos + count {
output.push(self.req(i)?);
}
output.extend(self.rest(pos + count)?);
Ok(output)
}
pub fn name_tag(&self) -> Tag {
self.call_info.name_tag.clone()
}
}
pub type RunnableContext = CommandArgs;
impl std::fmt::Debug for CommandArgs {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.call_info.fmt(f)
}
}
