As explained in https://git-scm.com/docs/git-config#Documentation/git-config.txt-branchltnamegtremote
if you have `remote.pushDefault` set in your global gitconfig (like I
do), then _that_ setting will take precedence over
`branch.<name>.remote` 😞
However, `branch.<name>.pushRemote` will take precedence over your
`remote.pushDefault` setting, such that
`gh pr checkout 123 && make changes && git push` will just work, even if
you have `remote.pushDefault` set 💪
This completely rewrites the PR lookup mechanism so that the caller
must specify the GraphQL fields to query for each PR. Additionally, this
fixes some export problems with `pr view --json`.
Features:
- Each pr command now gets assigned a concept of a Finder. This makes it
easier to stub the PR in tests without having to stub the underlying
HTTP calls or git invocations.
- `pr view --web` is much faster since it only fetches the "url" field.
- `pr diff 123` now skips a whole API call where a whole PR was
unnecessarily preloaded just to access its diff in a subsequent call.
- PullRequestGraphQL query builder is now used to construct queries.
- A bunch of individual commands are now freed of having to know about
concepts such as BaseRepo, Branch, Config, or Remotes.
