Module plugin 

Plugin trait for archive-type-aware metadata extraction.

A handler is one static HandlerSpec (name, type_id, aliases, extensions, columns — each stated once) plus ArchiveTypePlugin::extract_metadata. Everything else (name, type_id, meta, schema_fields, matches_path, the shared coords subcommand) is derived from the spec.

Structs

ExtensionRow

Metadata extracted from a single file by a plugin

HandlerCommand

One handler-specific subcommand advertised through HandlerMeta::commands.

HandlerMeta

Owned discovery record of a handler (what znippy handlers lists and --format resolves against). Derived from the HandlerSpec.

HandlerSpec

The static description of one handler: every fact about it, stated once.

PluginRegistry

Registry holding the single active package handler.

Enums

Col

The Arrow type of one handler column.

ExtensionValue

Typed values for extension fields

Traits

ArchiveTypePlugin

Trait implemented by each archive type plugin.

Functions

default_command

The shared subcommand set: coords <file> runs the handler’s own extract_metadata over the file (its bytes when readable, else just the path) and prints the coordinate columns — every column up to and including version, or the first column when there is no version.

file_name

The last path segment (a/b/c.crate → c.crate).