Custom Pipeline
===============

**Runner:** ``pyasl.pipelines.custom_pipeline.run_custom_pipeline``

**Purpose.** Power-user pipeline that can call **any** PyASL module or your own
class by **fully-qualified class name (FQCN)**. Supports two call styles:

- ``kwargs`` modules: ``run(ctx, **params)`` (preclinical-style)
- ``dict`` modules: ``run(data_descrip, params)`` (ASLtbx/MRICloud/Oxford-style)

Smart Parameters
----------------

- **Path resolution:** any value on a “path-ish” key (``path``, ``savedir``, etc.)
  or that *looks like a path* is resolved relative to ``data_dir``.
- **Meta injection:** any ``"from_meta"`` token is replaced by the value of the
  same key from the shared **Context**.

YAML Example
------------

.. code-block:: yaml

    type: custom
    steps:
      - module: BrukerLoader
        params: { root: "{root}", expno: 21 }
      - module: pyasl.modules.preclinical_motion_check.MotionCheck  # FQCN allowed
      - name: MRICloudCalculateDiffMap   # alias resolves to MRICloud module
        params: {}
      - module: SaveOutputs