Method find_first_colocated_esp

crates/blockdev/src/blockdev.rs:211–215

Find a single ESP partition among all root devices backing this device. Walks the parent chain to find all backing disks, then looks for ESP partitions on each. Returns the first ESP found. This is the common case for composefs/UKI boot paths where exactly one ESP is expected.

(&self)

    /// partitions on each. Returns the first ESP found. This is the common
    /// case for composefs/UKI boot paths where exactly one ESP is expected.
    pub fn find_first_colocated_esp(&self) -> Result<Device> {
        self.find_colocated_esps()?
            .and_then(|mut v| Some(v.remove(0)))
            .ok_or_else(|| anyhow!("No ESP partition found among backing devices"))
    }

    /// Find all BIOS boot partitions across all root devices backing this device.
    /// Calls find_all_roots() to discover physical disks, then searches each for a BIOS boot partition.