Method find_change_by_prefix

atomic-repository/src/repository/changes.rs:601–621

Find a change by hash prefix. This searches through all stored changes to find one whose hash starts with the given prefix. Useful for CLI commands that allow abbreviated hashes. # Arguments `prefix` - The hash prefix (case-insensitive, at least 2 characters) # Returns `Ok(Some(hash))` - Found a unique matching change `Ok(None)` - No change matched the prefix `Err(_)` - Multiple changes match

(&self, prefix: &str)

    /// }
    /// ```
    pub fn find_change_by_prefix(&self, prefix: &str) -> Result<Option<Hash>, RepositoryError> {
        let prefix_upper = prefix.to_uppercase();
        let mut matches = Vec::new();

        for result in self.iter_changes() {
            let hash = result?;
            let hash_str = hash.to_base32();
            if hash_str.starts_with(&prefix_upper) {
                matches.push(hash);
                // If we find more than one, it's ambiguous
                if matches.len() > 1 {
                    return Err(RepositoryError::AmbiguousHash {
                        prefix: prefix.to_string(),
                        matches: matches.iter().map(|h| h.to_base32()).collect(),
                    });
                }
            }
        }

        Ok(matches.into_iter().next())
    }

    // =========================================================================
    // Provenance Graph Operations