github_branch needs to not fail if branch doesn't exist

[threeseed]

Affected Resource(s)

• github_branch

For a new repository (or one in which the branch doesn't exist) the following will fail the entire plan/apply. It would be nice if etag/ref/sha were null so that we could use that to conditionally create other resources.

In my case I want to set the develop branch to the default IF the branch exists.

Terraform Configuration Files

data "github_branch" "main" {
  repository                = github_repository.repository.name
  branch                    = "develop"
}

Error Output

GET https://api.github.com/repos/<org>/<repo>/git/ref/heads/main: 404 Not Found []