Struct FileHash 

pub struct FileHash {
    pub path: PathBuf,
    pub hash: u64,
    pub size: u64,
    pub mtime: SystemTime,
    pub symbols_count: usize,
    pub content: Option<String>,
}

Hash information for a single file.

This structure stores both the content hash (for change detection) and metadata (for quick pre-checks before expensive hashing).

Phase 3: Content Caching

The optional content field caches file content in memory to enable content-based diffing without disk I/O. This is controlled by the HashIndex content-cache limit (configurable per builder) and is not persisted to disk (#[serde(skip)]).

Fields

path: PathBuf

Absolute path to the file

hash: u64

XXHash64 hash of file contents

size: u64

File size in bytes

mtime: SystemTime

Last modification time

symbols_count: usize

Number of symbols extracted from this file (for stats)

content: Option<String>

Cached file content for content-based diffing (Phase 3/4).

Populated according to the content-cache size configuration managed by HashIndex. Not persisted to disk (rebuilt on load if needed).

Implementations

impl FileHash

pub fn compute(path: &Path) -> Result<Self>

Compute hash for a file.

This reads the file in chunks and computes an XXHash64 hash.

Errors

Returns an error if the file cannot be read or metadata cannot be accessed.

pub fn from_bytes(path: &Path, content: &[u8]) -> Result<Self>

Quick compute using just the file bytes (for testing or small files).

This is faster for small files but requires loading the entire file into memory.

Errors

Returns anyhow::Error when the filesystem metadata for path cannot be read.

pub fn metadata_changed(&self, path: &Path) -> Result<bool>

Check if file metadata (size or mtime) has changed.

This is a fast pre-check before expensive hashing.

Errors

Returns anyhow::Error when the file’s metadata cannot be read.

Trait Implementations

impl Clone for FileHash

fn clone(&self) -> FileHash

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FileHash

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FileHash

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for FileHash

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.