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load_sidecar

type_bridge_migration::loader

Function load_sidecar 

Source 
pub fn load_sidecar(py_path: &Path) -> Result<Option<MigrationSpec>>
Expand description

Load the sidecar spec for a given .py migration path.

Derives the sidecar path by replacing the .py extension with .json (same stem, sibling file).

  • If the .json sibling does not exist → Ok(None). The caller should fall back to the trusted-import Python path for this file.
  • If it exists → read, deserialize, and return Ok(Some(spec)).
  • If it exists but is malformed → Err(MigrationError::Loader { .. }).

§Errors

Returns MigrationError::Loader when the sidecar exists but cannot be read or deserialized.