pub(crate) struct AtomMap(BTreeMap<Label, PathBuf>);Tuple Fields§
§0: BTreeMap<Label, PathBuf>Implementations§
Trait Implementations§
Source§impl<'de> Deserialize<'de> for AtomMap
§AtomMap Deserialization: Enforcing Repository Path Invariants
This implementation provides a unique deserialization strategy for AtomMap that
conditionally enforces path normalization based on repository availability. This
behavior is crucial for maintaining the integrity of atom paths within the Ekala
ecosystem.
impl<'de> Deserialize<'de> for AtomMap
§AtomMap Deserialization: Enforcing Repository Path Invariants
This implementation provides a unique deserialization strategy for AtomMap that
conditionally enforces path normalization based on repository availability. This
behavior is crucial for maintaining the integrity of atom paths within the Ekala
ecosystem.
§Purpose
The primary goal is to prevent atom paths from escaping the repository boundary.
Since AtomMap is constructed from the actual on-disk manifest during deserialization,
this provides an opportunity to validate and normalize paths early in the process,
failing fast if any path would violate the repository containment invariant.
§Behavior
-
When inside a repository: Paths are normalized using the repository’s
normalize()method, which ensures all paths are relative to the repository root and contained within the repository boundaries. If normalization fails (indicating a path outside the repository), deserialization fails immediately. -
When outside a repository: Paths are left as-is, allowing normal operation in non-repository contexts (e.g., testing, standalone usage).
§Implementation Details
The implementation uses a global static reference to a lazily initialized repository
instance (git::repo()). This ensures:
- Efficient access: The repository is only discovered once per process
- Conditional behavior: Normalization only occurs when a repository is available
- Thread safety: Uses
OnceLockfor safe static initialization
§Why This Matters
Atom paths must never escape the repository because they represent internal references that are meaningless outside the repository context. By enforcing this invariant during deserialization, we prevent invalid states that could lead to data corruption, security issues, or inconsistent behavior.
§Error Handling
If path normalization fails when a repository is present, deserialization
returns a custom error, preventing the creation of an invalid AtomMap instance.
This early failure ensures problems are caught during manifest loading rather
than later during atom resolution.
§Additional Invariants
Beyond path containment, this implementation also enforces that no two atoms
share the same label. Since the map is keyed by Label, duplicate labels would
overwrite entries, losing atom identity. The implementation detects and rejects
such conflicts during deserialization, ensuring each atom maintains its distinct
identity.
Source§fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
Deserializes a list of paths into an AtomMap, enforcing repository path invariants.
This function transforms a serialized list of paths into a map keyed by atom labels, acquired directly from each atom’s manifest. This approach enables canonical addressing and efficient lookups while enforcing crucial invariants: path containment within the repository and uniqueness of atom labels.
The deserialization process:
- Deserializes the input as a
Vec<PathBuf> - For each path, normalizes it relative to the repository root (when in a repo)
- Reads the atom manifest to extract the canonical label
- Ensures no duplicate labels exist
- Constructs the final
BTreeMap<Label, PathBuf>
§Errors
Returns an error if:
- Path normalization fails (paths outside repository when in repo context)
- Atom manifest cannot be read or parsed
- Multiple atoms share the same label
impl Eq for AtomMap
impl StructuralPartialEq for AtomMap
Auto Trait Implementations§
impl Freeze for AtomMap
impl RefUnwindSafe for AtomMap
impl Send for AtomMap
impl Sync for AtomMap
impl Unpin for AtomMap
impl UnwindSafe for AtomMap
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