fn run<F, U>(&mut self, f: F) -> io::Result<U>
    where
        F: Fn(&mut Command) -> io::Result<U>,
    {
        let mut child: Option<Child> = None;
        let commands_len = self.commands.len();
        for (i, command) in self.commands[..commands_len - 1].iter_mut().enumerate() {
            if let Some(child) = child {
                command.stdin(child.stdout.unwrap());
            }
            if i == commands_len - 1 {
                break;
            } else {
                command.stdout(Stdio::piped());
                child = Some(command.spawn()?);
            }
        }
        f(&mut self.commands[commands_len - 1])
    }
/// Spawns all commands except the last one and calls `f` on the last command.
///
/// # Panics
///
/// This method panics if [`commands`] is empty.
///
/// [`commands`]: Self::commands
Spawns all commands except the last one and calls `f` on the last command.
Spawns all commands except the last one and calls ` f ` on the last command .
fn run<F, U>(&mut self, f: F) -> io::Result<U>
    where
        F: Fn(&mut Command) -> io::Result<U>,
    {
        let mut child: Option<Child> = None;
        let commands_len = self.commands.len();
        for (i, command) in self.commands[..commands_len - 1].iter_mut().enumerate() {
            if let Some(child) = child {
                command.stdin(child.stdout.unwrap());
            }
            if i == commands_len - 1 {
                break;
            } else {
                command.stdout(Stdio::piped());
                child = Some(command.spawn()?);
            }
        }
        f(&mut self.commands[commands_len - 1])
    }
fn run < F , U > ( & mut self , f : F ) -> io :: Result < U > where F : Fn ( & mut Command ) -> io :: Result < U > , { let mut child : Option < Child > = None ; let commands_len = self . commands . len ( ) ; for ( i , command ) in self . commands [ .. commands_len - 1 ] . iter_mut ( ) . enumerate ( ) { if let Some ( child ) = child { command . stdin ( child . stdout . unwrap ( ) ) ; } if i == commands_len - 1 { break ; } else { command . stdout ( Stdio :: piped ( ) ) ; child = Some ( command . spawn ( ) ? ) ; } } f ( & mut self . commands [ commands_len - 1 ] ) }
Spawns all commands except the last one and calls `f` on the last command.
Spawns all commands except the last one and calls ` f ` on the last command .
&mut self
f
F
&mut self
f
F
panics
This method panics if [`commands`] is empty.

[`commands`]: Self::commands
This method panics if [ ` commands ` ] is empty . [ ` commands ` ] : Self :: commands