Method visible_file_paths

atomic-repository/src/repository/materialize.rs:235–272

Compute the set of file paths visible on a view. Visibility includes the view's own changes AND all changes inherited through the parent chain. A draft view parented on dev sees dev's files without requiring an explicit insert. A file is visible on a view when: 1. It appears in the global TREE table (has been `add`ed). 2. Its inode has a graph position in the INODES table (has been `record`ed).

(&self, view_name: &str)

    /// entry) are NOT returned — they persist across switches as
    /// working-copy state.
    pub fn visible_file_paths(&self, view_name: &str) -> Result<HashSet<String>, RepositoryError> {
        let txn = self
            .pristine
            .read_txn()
            .map_err(|e| RepositoryError::Database(e.to_string()))?;

        let view = match txn
            .get_view(view_name)
            .map_err(|e| RepositoryError::Database(e.to_string()))?
        {
            Some(s) => s,
            None => return Ok(HashSet::new()),
        };

        // Use the FULL visible change set (own + parent chain) so that
        // draft views parented on dev see dev's files.
        let view_change_ids = collect_visible_change_ids(&txn, &view)?;

        // Walk TREE and keep paths whose introducing change is in the log.
        let mut paths: HashSet<String> = HashSet::new();
        let tree_iter = txn
            .iter_tree()
            .map_err(|e| RepositoryError::Database(e.to_string()))?;

        for result in tree_iter {
            let (path, inode) = result.map_err(|e| RepositoryError::Database(e.to_string()))?;
            if let Some(position) = txn
                .inode_position(inode)
                .map_err(|e| RepositoryError::Database(e.to_string()))?
            {
                if view_change_ids.contains(&position.change) {
                    paths.insert(path);
                }
            }
        }

        Ok(paths)
    }

    /// Materialize the working copy to match the current view's state.
    ///