feat(ops/github): set the name of the default branch

From now on we should always be using 'main'. If a project requires
'master', it will need to be set explicitly.

1 files changed, 13 insertions, 0 deletions

diff --git a/ops/github/repositories.tf b/ops/github/repositories.tf
index 506f0dd..2465d43 100644
--- a/ops/github/repositories.tf
+++ b/ops/github/repositories.tf
@@ -19,3 +19,16 @@ resource "github_repository" "repos" {
   vulnerability_alerts   = try(each.value.vulnerability_alerts, false)
   delete_branch_on_merge = try(each.value.vulnerability_alerts, false)
 }
+
+resource "github_branch_default" "main" {
+  # no need to set the default branch if the repository is already
+  # archived.
+  # use the name for the repository if set
+  for_each = {
+    for k, v in local.repositories : try(v.name, k) => v
+    if v.archived == false
+  }
+
+  repository = each.key
+  branch     = try(each.value.default_branch, "main")
+}