Support Buildkite plugin lookups

[jamietanna]

While digging into https://gitlab.com/tanna.dev/dependency-management-data/-/issues/599 I noticed that DMD, which uses Ecosyste.ms doesn't detect Buidlkite plugins.

Note

Buildkite plugins are not a known type so this may not make sense to add here.

With DMD, I would see from the following Buildkite YAML (via):

  - label: ":sweating: Checking for changes in connectors"
    plugins:
      chronotc/monorepo-diff#v2.4.0:

And a package of pURL pkg:buildkite/chronotc%2Fmonorepo-diff is detected.

This is Buildkite's way of noting that chronotc/monorepo-diff is located at https://github.com/chronotc/monorepo-diff-buildkite-plugin (notice the prepended -buildkite-plugin)

I would suggest special handling for the buildkite ecosystem to provide some package lookup, including a Repo lookup for the full URL.

[andrew]

Yeah we can add that as a new package type, would also make sense to propose it as a type to the PURL project.

Do you know if there's a machine readable list of all buildkite plugins anywhere? Otherwise we could scrape https://buildkite.com/plugins