topmark.cli.cmd_common

topmark / cli / cmd_common

Common command utilities for Click-based commands.

This module holds small, focused helpers used by multiple CLI commands. They intentionally avoid policy (exit code rules, messages) and only encapsulate plumbing such as running pipelines, filtering, and error exits.

It also contains a small initializer (init_common_state) that prepares the shared typed CLI state (TopmarkCliState) for commands that own verbosity, color, and related human-output controls rather than the root command group.

PreparedCliConfig dataclass

PreparedCliConfig(*, resolved_toml, draft)

Prepared CLI config state for a command run.

Attributes:

Name	Type	Description
resolved_toml	ResolvedTopmarkTomlSources	Resolved TOML-side state for the current invocation.
draft	MutableConfig	Mutable config draft after layered CLI overrides.

init_common_state

init_common_state(
    ctx, *, verbosity, quiet, color_mode, no_color
)

Initialize shared UI/runtime state on the Click context.

It initializes the shared TopmarkCliState stored on ctx.obj.

Parameters:

Name	Type	Description	Default
ctx	Context	Current Click context; will have obj and color set.	required
verbosity	int	Count of --verbose/-v flags (0..2).	required
quiet	bool	Whether --quiet/-q was provided.	required
color_mode	ColorMode | None	Explicit color mode from --color (or None).	required
no_color	bool	Whether --no-color was passed; forces color off.	required

Source code in src/topmark/cli/cmd_common.py

def init_common_state(
    ctx: click.Context,
    *,
    verbosity: int,
    quiet: bool,
    color_mode: ColorMode | None,
    no_color: bool,
) -> None:
    """Initialize shared UI/runtime state on the Click context.

    It initializes the shared `TopmarkCliState` stored on `ctx.obj`.

    Args:
        ctx: Current Click context; will have ``obj`` and ``color`` set.
        verbosity: Count of ``--verbose/-v`` flags (0..2).
        quiet: Whether ``--quiet/-q`` was provided.
        color_mode: Explicit color mode from ``--color`` (or ``None``).
        no_color: Whether ``--no-color`` was passed; forces color off.
    """
    state: TopmarkCliState = bootstrap_cli_state(ctx)

    # 1. Color policy for the effective command output format.
    effective_color_mode: ColorMode = (
        ColorMode.NEVER if no_color else (color_mode or ColorMode.AUTO)
    )
    # Store the resolved color mode in the Click context:
    state.color_mode = effective_color_mode
    enable_color: bool = resolve_color_mode(
        color_mode_override=effective_color_mode,
        output_format=state.output_format,
    )
    # Store whether color is enabled for this invocation.
    state.color_enabled = enable_color
    ctx.color = enable_color

    # 2. Initialize the console.
    # Respect the resolved color policy (may differ from the raw `--no-color`` flag).
    console = Console(enable_color=enable_color)
    # Store the console in the Click context:
    state.console = console

    # 3. Initialize internal logging (env-driven).
    level_env: int | None = resolve_env_log_level()
    setup_logging(level=level_env)
    # Store the resolved internal runtime log level in the Click context:
    state.log_level = level_env

    # 4. Validate output verbosity for human formats.
    fmt: OutputFormat = state.output_format

    # Store raw human-output controls so validators can normalize ignored flags.
    state.verbosity = verbosity
    state.quiet = quiet

    # Program-output verbosity / quiet policy (stored for downstream gating).
    validate_output_verbosity_policy(
        ctx,
        verbosity=verbosity,
        quiet=quiet,
        fmt=fmt,
    )

    # Store normalized effective human-output state for downstream consumers.
    state.verbosity = normalize_verbosity(state.verbosity)

build_file_resolution

build_file_resolution(*, run_options, config, temp_path)

Return file-list resolution diagnostics for the current invocation.

• In content-on-STDIN mode, return a synthetic resolution containing the single temp path created for staged input content.
• Otherwise, delegate to the unified resolver that uses config.files, files_from, include/exclude patterns, and file types.

Parameters:

Name	Type	Description	Default
run_options	RunOptions	Invocation-wide runtime options for the current run.	required
config	FrozenConfig	Effective run config used for file discovery.	required
temp_path	Path | None	Temporary file path created for content-on-STDIN mode, if any.	required

Returns:

Type	Description
FileListResolution	A FileListResolution
FileListResolution	containing selected files and any discovery diagnostics.

Raises:

Type	Description
RuntimeError	If temp_path is undefined in stdin_mode.

Source code in src/topmark/cli/cmd_common.py

def build_file_resolution(
    *,
    run_options: RunOptions,
    config: FrozenConfig,
    temp_path: Path | None,
) -> FileListResolution:
    """Return file-list resolution diagnostics for the current invocation.

    - In content-on-STDIN mode, return a synthetic resolution containing the
      single temp path created for staged input content.
    - Otherwise, delegate to the unified resolver that uses `config.files`,
      `files_from`, include/exclude patterns, and file types.

    Args:
        run_options: Invocation-wide runtime options for the current run.
        config: Effective run config used for file discovery.
        temp_path: Temporary file path created for content-on-STDIN mode, if any.

    Returns:
        A [FileListResolution][topmark.resolution.files.FileListResolution]
        containing selected files and any discovery diagnostics.

    Raises:
        RuntimeError: If `temp_path` is undefined in `stdin_mode`.
    """
    if run_options.stdin_mode:
        if temp_path is None:
            raise RuntimeError("temp_path should not be undefined in stdin_mode")
        return FileListResolution(
            selected=(temp_path,),
            missing_literals=(),
            unmatched_patterns=(),
        )
    resolution: FileListResolution = resolve_file_list_with_diagnostics(config)
    return resolution

build_run_options

build_run_options(
    *,
    apply_changes,
    write_mode,
    stdin_mode,
    stdin_filename,
    prune_views=True,
    keep_diff_view=False,
)

Build invocation-wide runtime options for a CLI command.

Parameters:

Name	Type	Description	Default
apply_changes	bool	Whether the command should write changes.	required
write_mode	str | None	Effective CLI write mode (stdout, atomic, or inplace).	required
stdin_mode	bool	Whether the command is operating in content-on-STDIN mode.	required
stdin_filename	str | None	Synthetic file name associated with STDIN content, if any.	required
prune_views	bool	If True, trim heavy views after the run (keeps summaries). Default: True.	True
keep_diff_view	bool	Whether to preserve the diff view.	False

Returns:

Type	Description
RunOptions	The execution-only runtime options for the current CLI invocation.

When available on the current Click context, resolved persisted writer preferences from TopMark TOML discovery are overlaid unless explicit runtime intent already selected a conflicting output mode or file write strategy.

Source code in src/topmark/cli/cmd_common.py

def build_run_options(
    *,
    apply_changes: bool,
    write_mode: str | None,
    stdin_mode: bool,
    stdin_filename: str | None,
    prune_views: bool = True,
    keep_diff_view: bool = False,
) -> RunOptions:
    """Build invocation-wide runtime options for a CLI command.

    Args:
        apply_changes: Whether the command should write changes.
        write_mode: Effective CLI write mode (`stdout`, `atomic`, or `inplace`).
        stdin_mode: Whether the command is operating in content-on-STDIN mode.
        stdin_filename: Synthetic file name associated with STDIN content, if any.
        prune_views: If `True`, trim heavy views after the run (keeps summaries). Default: `True`.
        keep_diff_view: Whether to preserve the diff view.

    Returns:
        The execution-only runtime options for the current CLI invocation.

    When available on the current Click context, resolved persisted writer
    preferences from TopMark TOML discovery are overlaid unless explicit
    runtime intent already selected a conflicting output mode or file write
    strategy.
    """
    output_target: OutputTarget | None = None
    file_write_strategy: FileWriteStrategy | None = None

    if stdin_mode and apply_changes or write_mode == OutputTarget.STDOUT.value:
        output_target = OutputTarget.STDOUT
        file_write_strategy = None
    elif write_mode == FileWriteStrategy.ATOMIC.value:
        output_target = OutputTarget.FILE
        file_write_strategy = FileWriteStrategy.ATOMIC
    elif write_mode == FileWriteStrategy.INPLACE.value:
        output_target = OutputTarget.FILE
        file_write_strategy = FileWriteStrategy.INPLACE

    run_options = RunOptions(
        apply_changes=apply_changes,
        output_target=output_target,
        file_write_strategy=file_write_strategy,
        stdin_mode=stdin_mode,
        stdin_filename=stdin_filename,
        prune_views=prune_views,
        keep_diff_view=keep_diff_view,
    )

    ctx: click.Context | None = click.get_current_context(silent=True)
    writer_options: WriterOptions | None = None
    if ctx is not None:
        state: TopmarkCliState = get_cli_state(ctx)
        candidate: object | None = state.resolved_writer_options
        if isinstance(candidate, WriterOptions):
            writer_options = candidate

    return apply_resolved_writer_options(run_options, writer_options)

exit_if_no_files

exit_if_no_files(file_list, *, console, styled)

Echo a friendly message and return True if there is nothing to process.

Source code in src/topmark/cli/cmd_common.py

def exit_if_no_files(file_list: list[Path], *, console: ConsoleProtocol, styled: bool) -> bool:
    """Echo a friendly message and return True if there is nothing to process."""
    if not file_list:
        info_styler: TextStyler = style_for_role(StyleRole.INFO, styled=styled)
        console.print(info_styler("\nℹ️  No files to process.\n"))
        return True
    return False

maybe_route_console_to_stderr

maybe_route_console_to_stderr(
    ctx, *, run_options, enable_color
)

Route human-facing console output to stderr when stdout carries file content.

TopMark can emit rewritten file content to STDOUT in two situations:

• content-on-STDIN mode (a lone - path) when --apply is set; and
• when --write-mode=stdout is used with --apply.

In both cases, the command must keep STDOUT clean for the content stream so that output can be piped safely. Human-facing output (summaries, warnings, diagnostics) is therefore routed to STDERR.

The function updates the console stored on the shared typed CLI state when rerouting is needed and returns the effective console instance.

Parameters:

Name	Type	Description	Default
ctx	Context	Current Click context.	required
run_options	RunOptions	Invocation-wide runtime options for the current run.	required
enable_color	bool	Whether color output is enabled for this invocation.	required

Returns:

Type	Description
ConsoleProtocol	The effective console instance to use for human-facing output.

Source code in src/topmark/cli/cmd_common.py

def maybe_route_console_to_stderr(
    ctx: click.Context,
    *,
    run_options: RunOptions,
    enable_color: bool,
) -> ConsoleProtocol:
    """Route human-facing console output to stderr when stdout carries file content.

    TopMark can emit rewritten file content to STDOUT in two situations:

    - content-on-STDIN mode (a lone `-` path) when ``--apply`` is set; and
    - when ``--write-mode=stdout`` is used with ``--apply``.

    In both cases, the command must keep STDOUT clean for the content stream so
    that output can be piped safely. Human-facing output (summaries, warnings,
    diagnostics) is therefore routed to STDERR.

    The function updates the console stored on the shared typed CLI state when
    rerouting is needed and returns the effective console instance.

    Args:
        ctx: Current Click context.
        run_options: Invocation-wide runtime options for the current run.
        enable_color: Whether color output is enabled for this invocation.

    Returns:
        The effective console instance to use for human-facing output.
    """
    emits_content_to_stdout: bool = bool(run_options.apply_changes) and (
        run_options.stdin_mode or (run_options.output_target == OutputTarget.STDOUT)
    )

    if emits_content_to_stdout:
        console = Console(
            enable_color=enable_color,
            out=sys.stderr,
            err=sys.stderr,
        )
        state: TopmarkCliState = get_cli_state(ctx)
        state.console = console
        return console

    # Fall back to the console initialized by `init_common_state`.
    return get_cli_state(ctx).console

maybe_exit_on_error

maybe_exit_on_error(*, code, temp_path)

If an error code was encountered, cleanup and exit with it.

Source code in src/topmark/cli/cmd_common.py

def maybe_exit_on_error(*, code: ExitCode | None, temp_path: Path | None) -> None:
    """If an error code was encountered, cleanup and exit with it."""
    if code is not None:
        from topmark.utils.file import safe_unlink

        safe_unlink(temp_path)
        click.get_current_context().exit(code)

build_cli_policy_overrides

build_cli_policy_overrides(state)

Build structured policy overrides from typed CLI state.

Parameters:

Name	Type	Description	Default
state	TopmarkCliState	Shared typed CLI invocation state.	required

Returns:

Type	Description
PolicyOverrides	Structured policy overrides derived from the mutable CLI policy object.

Source code in src/topmark/cli/cmd_common.py

def build_cli_policy_overrides(state: TopmarkCliState) -> PolicyOverrides:
    """Build structured policy overrides from typed CLI state.

    Args:
        state: Shared typed CLI invocation state.

    Returns:
        Structured policy overrides derived from the mutable CLI policy object.
    """
    policy: MutablePolicy = state.policy
    return PolicyOverrides(
        header_mutation_mode=policy.header_mutation_mode,
        allow_header_in_empty_files=policy.allow_header_in_empty_files,
        empty_insert_mode=policy.empty_insert_mode,
        render_empty_header_when_no_fields=policy.render_empty_header_when_no_fields,
        allow_reflow=policy.allow_reflow,
        allow_content_probe=policy.allow_content_probe,
    )

build_resolved_toml_sources_and_config_for_plan

build_resolved_toml_sources_and_config_for_plan(
    *,
    ctx,
    plan,
    no_config,
    config_paths,
    strict,
    include_file_types,
    exclude_file_types,
    align_fields,
    relative_to,
)

Build resolved TOML sources and a config draft for an input plan.

This helper keeps the CLI layer intentionally thin:

1. Compute a discovery anchor from the input plan.
2. Resolve TOML sources once.
3. Build the layered config draft from that resolved TOML state.
4. Apply layered CLI overrides via topmark.config.overrides.apply_config_overrides().

Resolution order remains:

defaults -> resolved TOML sources -> config draft -> CLI overrides

As a side effect, this helper also resolves persisted TOML writer preferences for the same discovery inputs and stores them on the shared typed CLI state for later runtime-option assembly.

Parameters:

Name	Type	Description	Default
ctx	Context	Click context carrying the shared typed CLI state.	required
plan	InputPlan	Input plan containing paths, STDIN metadata, and pattern-source options.	required
no_config	bool	Whether to skip discovered config files.	required
config_paths	list[str]	Explicit extra config files passed on the CLI.	required
strict	bool | None	Optional CLI override for strict config checking. None means that strictness should be taken from the resolved TOML sources.	required
include_file_types	list[str]	CLI include file-type filters.	required
exclude_file_types	list[str]	CLI exclude file-type filters.	required
align_fields	bool | None	Optional CLI override for header alignment.	required
relative_to	str | None	Optional CLI override for header-relative path rendering.	required

Returns:

Type	Description
PreparedCliConfig	Prepared CLI config state containing the resolved TOML-side state and
PreparedCliConfig	mutable config draft after layered CLI overrides.

Source code in src/topmark/cli/cmd_common.py

def build_resolved_toml_sources_and_config_for_plan(
    *,
    ctx: click.Context,
    plan: InputPlan,
    no_config: bool,
    config_paths: list[str],
    strict: bool | None,
    include_file_types: list[str],
    exclude_file_types: list[str],
    align_fields: bool | None,
    relative_to: str | None,
) -> PreparedCliConfig:
    """Build resolved TOML sources and a config draft for an input plan.

    This helper keeps the CLI layer intentionally thin:

    1. Compute a discovery anchor from the input plan.
    2. Resolve TOML sources once.
    3. Build the layered config draft from that resolved TOML state.
    4. Apply layered CLI overrides via
    `topmark.config.overrides.apply_config_overrides()`.

    Resolution order remains:

        defaults -> resolved TOML sources -> config draft -> CLI overrides

    As a side effect, this helper also resolves persisted TOML writer
    preferences for the same discovery inputs and stores them on the shared
    typed CLI state for later runtime-option assembly.

    Args:
        ctx: Click context carrying the shared typed CLI state.
        plan: Input plan containing paths, STDIN metadata, and pattern-source
            options.
        no_config: Whether to skip discovered config files.
        config_paths: Explicit extra config files passed on the CLI.
        strict: Optional CLI override for strict config
            checking. `None` means that strictness should be taken from the
            resolved TOML sources.
        include_file_types: CLI include file-type filters.
        exclude_file_types: CLI exclude file-type filters.
        align_fields: Optional CLI override for header alignment.
        relative_to: Optional CLI override for header-relative path rendering.

    Returns:
        Prepared CLI config state containing the resolved TOML-side state and
        mutable config draft after layered CLI overrides.
    """

    def _resolve_discovery_inputs() -> list[Path] | None:
        """Return input paths used only to select the discovery anchor.

        In STDIN mode, `stdin_filename` can still provide a directory hint
        (for example `pkg/module.py`). Otherwise, use the normal path list,
        or let the config layer fall back to CWD.
        """
        if plan.stdin_mode:
            stdin_name: str | None = plan.stdin_filename
            if stdin_name:
                sf: Path = Path(stdin_name)
                if sf.parent != Path():
                    if sf.is_absolute():
                        return [sf.parent]
                    return [(Path.cwd() / sf.parent).resolve()]
            return None

        resolved: list[Path] = [Path(p) for p in plan.paths if p and p != "-"]
        return resolved or None

    discovery_inputs: list[Path] | None = _resolve_discovery_inputs()
    extra_config_files: list[Path] = [Path(p) for p in config_paths]

    resolved_config: ResolvedConfigDraft = resolve_toml_sources_and_build_mutable_config(
        input_paths=discovery_inputs,
        extra_config_files=extra_config_files,
        strict=strict,
        no_config=no_config,
    )
    resolved_toml: ResolvedTopmarkTomlSources = resolved_config.resolved
    draft: MutableConfig = resolved_config.draft

    state: TopmarkCliState = bootstrap_cli_state(ctx)
    state.resolved_writer_options = resolved_toml.writer_options

    policy_overrides: PolicyOverrides = build_cli_policy_overrides(state)
    overrides: ConfigOverrides = ConfigOverrides(
        config_origin=Path(CLI_OVERRIDE_STR),
        policy=policy_overrides,
        files=plan.paths,
        files_from=none_if_empty(plan.files_from),
        include_from=none_if_empty(plan.include_from),
        exclude_from=none_if_empty(plan.exclude_from),
        include_patterns=none_if_empty(plan.include_patterns),
        exclude_patterns=none_if_empty(plan.exclude_patterns),
        include_file_types=include_file_types,
        exclude_file_types=exclude_file_types,
        align_fields=align_fields,
        relative_to=relative_to,
    )

    overridden_draft: MutableConfig = apply_config_overrides(draft, overrides=overrides)

    return PreparedCliConfig(
        resolved_toml=resolved_toml,
        draft=overridden_draft,
    )