Function resolve_inode

atomic-core/src/apply/position.rs:167–184

Resolve an inode position to an actual Inode value. Given a position referencing a file's inode span, looks up the actual Inode value from the position→inode mapping. # Arguments `txn` - Transaction for lookups `inode_pos` - Position of the inode span `current_change` - NodeId of the change being applied # Returns `Ok(Some(inode))` - The resolved inode `Ok(None)` - Position is ROOT or inode n

(
    txn: &T,
    inode_pos: &Position<Option<Hash>>,
    current_change: NodeId,
)

/// ROOT positions don't have an associated inode, so this returns `None`
/// for those cases.
pub fn resolve_inode<T: GraphTxnT + TreeTxnT>(
    txn: &T,
    inode_pos: &Position<Option<Hash>>,
    current_change: NodeId,
) -> Result<Option<Inode>, LocalApplyError> {
    let internal_pos = resolve_position(txn, inode_pos, current_change)?;

    // ROOT positions don't have an associated inode
    if internal_pos.change.is_root() {
        return Ok(None);
    }

    // Look up the Inode from the position
    txn.position_inode(internal_pos)
        .map_err(|e| LocalApplyError::Internal {
            message: format!("Failed to resolve inode: {}", e),
        })
}

/// Resolve the `introduced_by` field of an edge.
///