Terraform Version

{
  "terraform_version": "0.14.0",
  "terraform_revision": "",
  "provider_selections": {
    "registry.terraform.io/hashicorp/github": "4.1.0"
  },
  "terraform_outdated": false
}

Affected Resource(s)

• github_branch_default

Terraform Configuration Files

resource "github_branch_default" "this" {
  repository = github_repository.this.name
  branch     = github_branch.this.branch
}

Debug Output

https://gist.github.com/dee-kryvenko/7cc5b517ef72ce4f87ee63aec5d178b0

Expected Behavior

Should have set default branch successfully.

Actual Behavior

Fails to do so.

Steps to Reproduce

1. terraform apply

Important Factoids

I managed to narrow it down via curl to the following header: Accept: application/vnd.github.baptiste-preview+json, application/vnd.github.nebula-preview+json. It seems like if I remove application/vnd.github.nebula-preview+json part from my headers - it works. As it is used for the visibility field as described here https://docs.github.com/en/free-pro-team@latest/rest/reference/repos, I have tried to experiment with this field and it seems to only work if I set visibility: public. It fails as described above for both private and internal - so, unable to reproduce on a free org. It might be an issue with GitHub - I am currently talking to the Enterprise support and will update here with their findings.

References

• github_branch_default *always* returns 422 Visibility is already private. [] on deletion #620 - might be another symptom of the same issue?