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use std::{fs::File, io, process::Stdio, sync::Arc};
/// Describes where to direct the stdout or stderr output stream of external command to.
#[derive(Debug, Clone)]
pub enum OutDest {
/// Redirect the stdout and/or stderr of one command as the input for the next command in the pipeline.
///
/// The output pipe will be available as the `stdout` of [`ChildProcess`](crate::process::ChildProcess).
///
/// If stdout and stderr are both set to `Pipe`,
/// then they will combined into the `stdout` of [`ChildProcess`](crate::process::ChildProcess).
Pipe,
/// Capture output to later be collected into a [`Value`](crate::Value), `Vec`, or used in some other way.
///
/// The output stream(s) will be available in the `stdout` or `stderr` of [`ChildProcess`](crate::process::ChildProcess).
///
/// This is similar to `Pipe` but will never combine stdout and stderr
/// or place an external command's stderr into `stdout` of [`ChildProcess`](crate::process::ChildProcess).
Capture,
/// Ignore output.
///
/// This will forward output to the null device for the platform.
Null,
/// Output to nushell's stdout or stderr.
///
/// This causes external commands to inherit nushell's stdout or stderr.
Inherit,
/// Redirect output to a file.
File(Arc<File>), // Arc<File>, since we sometimes need to clone `OutDest` into iterators, etc.
}
impl From<File> for OutDest {
fn from(file: File) -> Self {
Arc::new(file).into()
}
}
impl From<Arc<File>> for OutDest {
fn from(file: Arc<File>) -> Self {
Self::File(file)
}
}
impl TryFrom<&OutDest> for Stdio {
type Error = io::Error;
fn try_from(out_dest: &OutDest) -> Result<Self, Self::Error> {
match out_dest {
OutDest::Pipe | OutDest::Capture => Ok(Self::piped()),
OutDest::Null => Ok(Self::null()),
OutDest::Inherit => Ok(Self::inherit()),
OutDest::File(file) => Ok(file.try_clone()?.into()),
}
}
}
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