efivar-fix 2.0.1

Rust crate for manipulating EFI variables using the OS interface.
Documentation 
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//! This module contains functions to write boot entries

use crate::{
    boot::BootVarFormat,
    efi::{Variable, VariableFlags},
    VarWriter,
};

use super::BootEntry;

pub trait BootVarWriter {
    fn create_boot_entry(&mut self, id: u16, entry: BootEntry) -> crate::Result<()>;
    fn set_boot_order(&mut self, ids: Vec<u16>) -> crate::Result<()>;
}

impl<T: VarWriter> BootVarWriter for T {
    fn set_boot_order(&mut self, ids: Vec<u16>) -> crate::Result<()> {
        let bytes: Vec<u8> = ids.iter().flat_map(|id| id.to_le_bytes()).collect();

        self.write(
            &Variable::new("BootOrder"),
            VariableFlags::default(),
            &bytes,
        )?;

        log::debug!("Set BootOrder to {ids:?}");
        Ok(())
    }

    /// Creates an EFI variable for a boot entry.
    /// You then need to add it to the boot order using [`BootVarWriter::set_boot_order`].
    fn create_boot_entry(&mut self, id: u16, entry: BootEntry) -> crate::Result<()> {
        let bytes = entry.to_bytes();

        self.write(
            &Variable::new(&id.boot_var_format()),
            VariableFlags::default(),
            &bytes,
        )?;

        log::debug!("Created boot entry for ID {id}: {entry:?}");
        Ok(())
    }
}