Function hash_worktree_file 

pub fn hash_worktree_file(
    odb: &Odb,
    path: &Path,
    meta: &Metadata,
    conv: &ConversionConfig,
    file_attrs: &FileAttrs,
    rel_path: &str,
    index_entry: Option<&IndexEntry>,
    filter_process: Option<&FilterProcessState>,
) -> Result<ObjectId>

Hash normalized worktree bytes for a path (does not write to the object database).

Files that need no clean conversion are hashed as a stream, without reading them into memory, from 1 MiB (or core.bigFileThreshold when that is smaller).

Errors

Returns Error::Io when the file cannot be read, and Error::Filter when a filter.<driver>.required clean filter fails or cannot be started; content is never stored or hashed unfiltered in that case.