Method unmount

std/src/storage/mod.rs:479–499

Detaches an existing drive named `name`. The drive `name` must exist, cannot be the current drive, and cannot be the last mounted drive.

(&mut self, name: &str)

    /// The drive `name` must exist, cannot be the current drive, and cannot be the last mounted
    /// drive.
    pub fn unmount(&mut self, name: &str) -> io::Result<()> {
        let key = DriveKey::new(name)?;
        if !self.drives.contains_key(&key) {
            return Err(io::Error::new(
                io::ErrorKind::NotFound,
                format!("Drive '{}' is not mounted", name),
            ));
        }
        if self.current == key {
            return Err(io::Error::new(
                io::ErrorKind::AlreadyExists,
                format!("Cannot unmount the current drive '{}'", name),
            ));
        }
        assert!(
            self.drives.len() > 1,
            "There must be more than one drive if the current drive is not the given name"
        );
        self.drives.remove(&key).expect("Drive presence in map checked above");
        Ok(())
    }

    /// Returns information about the mounted drives as a mapping of drive names to the URIs that
    /// were used to mount them.