Method get_file_content_excluding

atomic-repository/src/repository/content.rs:174–240

Get file content, excluding a specific change. This is identical to [`Self::get_file_content`] but removes `exclude_hash` from the change filter. Use this to get the file content as it was **before** a specific change was applied — pass the change's hash as `exclude_hash` and you get the prior state.

(
        &self,
        path: P,
        exclude_hash: &Hash,
    )

    /// content as it was **before** a specific change was applied — pass
    /// the change's hash as `exclude_hash` and you get the prior state.
    pub fn get_file_content_excluding<P: AsRef<Path>>(
        &self,
        path: P,
        exclude_hash: &Hash,
    ) -> Result<Option<Vec<u8>>, RepositoryError> {
        use atomic_core::output::alive::RetrieveOptions;
        let path = path.as_ref();
        let normalized = normalize_path(path);

        let txn = self
            .pristine
            .read_txn()
            .map_err(|e| RepositoryError::Database(e.to_string()))?;

        let view = txn
            .get_view(&self.current_view)
            .map_err(|e| RepositoryError::Database(e.to_string()))?
            .ok_or_else(|| RepositoryError::ViewNotFound {
                name: self.current_view.clone(),
            })?;

        if !is_tracked(&txn, &normalized).map_err(|e| RepositoryError::Database(e.to_string()))? {
            return Ok(None);
        }

        let inode = match get_inode(&txn, &normalized) {
            Ok(Some(inode)) => inode,
            Ok(None) => return Ok(None),
            Err(e) => return Err(RepositoryError::Database(e.to_string())),
        };

        let position = match txn.inode_position(inode) {
            Ok(Some(pos)) => pos,
            Ok(None) => return Ok(None),
            Err(e) => return Err(RepositoryError::Database(e.to_string())),
        };

        let mut change_filter = if view.kind.is_shared() && view.parent.is_none() {
            collect_view_change_ids(&txn, &view)?
        } else {
            collect_visible_change_ids_with_deps(&txn, &view)?
        };

        // Remove the excluded change from the filter
        if let Ok(Some(exclude_id)) = txn.get_internal(exclude_hash) {
            change_filter.remove(&exclude_id);
        }

        let options = RetrieveOptions::new().with_change_filter(change_filter);

        let cached_txn =
            CachedGraphTxn::new(&txn).map_err(|e| RepositoryError::Database(e.to_string()))?;
        let content = retrieve_content_with_filter_fast(
            &cached_txn,
            &self.change_store,
            inode,
            position,
            options,