Make `allow` and `ignore` symmetric

[asciimike]

Currently, Dependabot offers two ways of opting dependencies in or out of updates: allow and ignore. The main differences (from a config file functionality standpoint) are:

• allow has the ability to specify dependency-type's (e.g. development, production) to allow a certain number of dependencies
• ignore has the ability to opt out of certain versions, while allow can't opt you in to certain versions (e.g. only allow updates on x.y.z not x+1.y.z).

It certainly feels useful to be able to write something like:

updates:
  - package-ecosystem: "npm"
    directory: "/"
    schedule:
      interval: "daily"
    ignore:
      - dependency-type: "development"

Which would fulfill issues like https://github.com/dependabot/dependabot-core/issues/3475

We also offer a @dependabot ignore command without a corresponding @dependabot allow command, though dependabot updates everything by default, so allow might be redundant, unless you're trying to opt back in after you've opted out.

As an internal implementation note, I believe allow and ignore run at different times, so potentially we might want to unify this, or further clarify this behavior.

[feelepxyz]

Thoughts on doing this in stages? Adding dependency-type to ignore would be a pretty straight forward change compared to adding versions to allow.

[asciimike]

Fine with doing it in stages, just wanted to create an issue that covers the majority of these feature requests.

[siddharthvp]

For npm at the moment would setting allow: - dependency-type: production disable the updates for devDependencies? I missed that option while going through the docs earlier.

[feelepxyz]

would setting allow: - dependency-type: production disable the updates for devDependencies

@siddharthvp yep 👍

[siddharthvp]

Sorry if this appears unrelated – but would a combo like the following also work as of now?

updates:
  - package-ecosystem: "npm"
    directory: "/"
    schedule:
      interval: daily
    allow:
      - dependency-type: production

  - package-ecosystem: "npm"
    directory: "/"
    schedule:
      interval: monthly
    allow: 
      - dependency-type: development

(The intent is to get regular dependency updates daily and devDependency updates monthly.)

[asciimike]

@siddharthvp your head is in the right place, but unfortunately we don't currently support multiple schedules for the same ecosystem/directory pair. It's something we've considered, but it'll probably be a little further out (we're working on #2219 now).

[humphrey]

+1 for adding dependency-type to ignore if it's a straightforward change.

I believe that it is currently possible to only produce pull requests for dependency-type: "production" but it would be nice for them to be completely removed on the dependabot list.

Use case: I don't care about all of the security updates to "express" if it's only used in my web-based project to power hot-reloading during development.