Function extractCommand

extractCommand(
patterns: readonly string[],
options: Readonly<ExtractOptions>,
): Promise<void>
CLI command handler for extract operations.

Writes each inline base64 image data URI in the given markdown files out to a real image file and rewrites the markdown to link to it. The image filename derives from the alt text when it yields a usable slug, otherwise a per-file img-1, img-2, ... counter is used; the extension comes from the data URI's mime type.
Parameters
- patterns: readonly string[]
  File patterns to process (supports globs)
- options: Readonly<ExtractOptions>
  Command options
Returns Promise<void>
Example
Extract every inline image, writing files next to the markdown, or into a shared asset directory
```
  markmv extract doc.md
  markmv extract docs/*.md --output-dir assets/
```
Throws
Will exit the process with code 1 if the operation fails
- Defined in commands/extract.ts:110