Method run

atomic-cli/src/commands/split.rs:156–228

(&self)

impl Command for Split {
    fn run(&self) -> CliResult<()> {
        // Validate the new view name
        validate_view_name(&self.name).map_err(|msg| CliError::InvalidArgument { message: msg })?;

        // Find the repository
        let repo_root = find_repository_root()?;
        let mut repo = Repository::open(&repo_root).map_err(|e| match e {
            atomic_repository::RepositoryError::NotFound { path } => CliError::RepositoryNotFound {
                searched_path: path.into(),
            },
            other => CliError::Repository(other),
        })?;

        // Determine source view (default to current)
        let source = self
            .source
            .clone()
            .unwrap_or_else(|| repo.current_view().to_string());

        // Verify source view exists
        if !repo.view_exists(&source).map_err(CliError::Repository)? {
            return Err(CliError::ViewNotFound {
                name: source.clone(),
            });
        }

        // Check if the new view already exists
        if repo.view_exists(&self.name).map_err(CliError::Repository)? {
            return Err(CliError::ViewAlreadyExists {
                name: self.name.clone(),
            });
        }

        // Get source view info for reporting
        let source_info = repo.get_view_info(&source).map_err(CliError::Repository)?;
        let change_count = source_info.change_count;

        // Create the new view by copying change log from source.
        // This does NOT re-insert changes into the graph - it just copies metadata.
        // This avoids conflicts that would occur if we tried to re-insert changes
        // that have already modified the shared graph.
        repo.create_view_from(&self.name, &source)
            .map_err(CliError::Repository)?;

        if change_count > 0 {
            print_success(&format!(
                "Created view: {} (split from {} with {} changes)",
                style_view(&self.name),
                style_view(&source),
                change_count
            ));
        } else {
            print_success(&format!(
                "Created view: {} (split from {} - empty)",
                style_view(&self.name),
                style_view(&source)
            ));
        }