Struct BuildCache 

pub struct BuildCache { /* private fields */ }

Incremental build cache backed by a JSON file.

Implementations

impl BuildCache

pub fn empty() -> Self

Create an empty in-memory cache (no file backing).

pub fn load(content_root: &Path) -> Result<Self, String>

Load cache from file, or create empty if file doesn’t exist or is invalid.

Errors

Returns an error if the file exists but cannot be read.

pub fn is_unchanged(&self, path: &str, current_hash: &str) -> bool

Check if a file is unchanged since last build. Returns true if the file hash matches the cache and all dependencies are also unchanged.

pub fn is_unchanged_with_hashes( &self, path: &str, current_hash: &str, current_hashes: &HashMap<String, String>, ) -> bool

Check if a file and all its dependencies are unchanged, given a map of current file hashes.

pub fn put(&mut self, path: &str, hash: String, deps: Vec<String>)

Record a file’s hash and dependencies in the cache.

pub fn prune(&mut self, existing_files: &HashSet<String>)

Remove entries for files that no longer exist.

pub fn save(&self) -> Result<(), String>

Save cache to file.

Errors

Returns an error if the file cannot be written.

pub fn len(&self) -> usize

Number of entries in the cache.

pub fn is_empty(&self) -> bool

Whether the cache is empty.

Trait Implementations

impl Debug for BuildCache

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

Formats the value using the given formatter.