[BUG]: github_repository creation fails when organization enforces required custom properties (no way to set them at create time)

[rodwill]

Expected Behavior

When an organization has custom properties marked as required = true (via github_organization_custom_properties), it should be possible to create a repository with github_repository and provide the required property values during the same terraform apply. This aligns with GitHub's documented organization setting "Require this property for all repositories": https://docs.github.com/en/organizations/managing-organization-settings/managing-custom-properties-for-repositories-in-your-organization#setting-values-for-repositories-in-your-organization.

Actual Behavior

Repository creation fails because required custom properties cannot be provided in the github_repository resource at create time.

Current flow creates a chicken-and-egg problem:

1. github_repository does not expose an argument/block to set custom property values during create.
2. github_repository_custom_property requires an existing repository (repository argument).
3. If org policy enforces required properties on creation, GitHub API rejects repository creation before github_repository_custom_property can run.

As a result, there is no valid Terraform path to create a new repository under that policy.

Terraform Version

Terraform v1.11.x
provider registry.terraform.io/integrations/github v6.6.0+

Affected Resource(s)

• github_repository
• github_repository_custom_property

Terraform Configuration Files

resource "github_organization_custom_properties" "environment" {
  property_name  = "environment"
  value_type     = "single_select"
  required       = true
  allowed_values = ["development", "staging", "production"]
}

resource "github_repository" "my_repo" {
  name        = "my-new-repo"
  description = "A new repository"
  visibility  = "private"
  auto_init   = true

  # No field currently exists to set required custom property values here
}

resource "github_repository_custom_property" "my_repo_env" {
  repository     = github_repository.my_repo.name
  property_name  = "environment"
  property_type  = "single_select"
  property_value = ["production"]
}

Steps to Reproduce

1. Define an organization custom property with required = true.
2. Attempt to create a new repository using github_repository.
3. Run terraform apply.
4. Observe repository create failing because required custom property value is missing.

Debug Output

Error: POST https://api.github.com/orgs/{org}/repos: 422 Validation Failed
Required custom property 'environment' is missing.

Panic Output

N/A

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

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