add support for arbitrary branch protection rules

terraform/github/repository.tf

@@ -1,16 +1,16 @@
 module "github_repository" {
-  source               = "../modules/github_repository"
-  for_each             = var.repositories
-  name                 = each.key
-  description          = each.value.description
-  topics               = each.value.topics
-  homepage_url         = each.value.homepage_url
-  visibility           = each.value.visibility
-  collaborators        = each.value.collaborators
-  pages                = each.value.pages
-  has_discussions      = each.value.has_discussions
-  is_archived          = each.value.is_archived
-  allow_squash_merge   = each.value.allow_squash_merge
-  allow_rebase_merge   = each.value.allow_rebase_merge
-  has_release_branches = each.value.has_release_branches
+  source                  = "../modules/github_repository"
+  for_each                = var.repositories
+  name                    = each.key
+  description             = each.value.description
+  topics                  = each.value.topics
+  homepage_url            = each.value.homepage_url
+  visibility              = each.value.visibility
+  collaborators           = each.value.collaborators
+  pages                   = each.value.pages
+  has_discussions         = each.value.has_discussions
+  is_archived             = each.value.is_archived
+  allow_squash_merge      = each.value.allow_squash_merge
+  allow_rebase_merge      = each.value.allow_rebase_merge
+  branch_protection_rules = each.value.branch_protection_rules
 }

terraform/github/terraform.tfvars

@@ -61,17 +61,24 @@ repositories = {
   }
   effect = {
     description        = "A fully-fledged functional effect system for TypeScript with a rich standard library"
+    homepage_url       = "https://www.effect.website"
+    topics             = ["effect-system", "fp", "framework", "stack-safe", "typescript", "zio"]
+    pages              = { build_type = "workflow" }
     allow_rebase_merge = true
     collaborators = [
       { username = "DenisFrezzato", permission = "push" },
       { username = "isthatcentered", permission = "push" },
       { username = "remiguittaut", permission = "push" },
       { username = "rzeigler", permission = "push" },
     ]
-    pages                = { build_type = "workflow" }
-    homepage_url         = "https://www.effect.website"
-    topics               = ["effect-system", "fp", "framework", "stack-safe", "typescript", "zio"]
-    has_release_branches = true
+    branch_protection_rules = {
+      "next-*" = {
+        allows_force_pushes = true
+        required_status_checks = {
+          strict = true
+        }
+      }
+    }
   }
   eslint-plugin = {
     description = "A set of ESlint and TypeScript rules to work with Effect"

terraform/github/variables.tf

@@ -30,6 +30,31 @@ variable "repositories" {
       source_branch = optional(string)
       source_path   = optional(string)
     }))
+    branch_protection_rules = optional(map(object({
+      allows_deletions                = optional(bool)
+      allows_force_pushes             = optional(bool)
+      blocks_creations                = optional(bool)
+      enforce_admins                  = optional(bool)
+      lock_branch                     = optional(bool)
+      require_signed_commits          = optional(bool)
+      require_conversation_resolution = optional(bool)
+      push_restrictions               = optional(list(string))
+      force_push_bypassers            = optional(list(string))
+      required_linear_history         = optional(bool)
+      required_pull_request_reviews = optional(object({
+        dismiss_stale_reviews           = optional(bool)
+        dismissal_restrictions          = optional(list(string))
+        restrict_dismissals             = optional(bool)
+        pull_request_bypassers          = optional(list(string))
+        require_code_owner_reviews      = optional(bool)
+        required_approving_review_count = optional(number)
+        require_last_push_approval      = optional(bool)
+      }))
+      required_status_checks = optional(object({
+        strict   = optional(bool)
+        contexts = optional(list(string))
+      }))
+    })))
   }))
 }
 

terraform/modules/github_repository/branch.tf

@@ -8,46 +8,66 @@ resource "github_branch_default" "main" {
   repository = github_repository.repository.name
 }
 
-resource "github_branch_protection" "main" {
+resource "github_branch_protection" "rules" {
   # Branch protection can only be enabled on private repositories if using a
   # paid GitHub plan
-  count = var.visibility == "public" ? 1 : 0
+  for_each = var.visibility == "public" ? local.branch_protection_rules : tomap({})
 
-  repository_id           = github_repository.repository.node_id
-  pattern                 = var.default_branch
-  enforce_admins          = true
-  required_linear_history = true
+  repository_id                   = github_repository.repository.node_id
+  pattern                         = each.key
+  allows_deletions                = try(each.value.allows_deletions, false)
+  allows_force_pushes             = try(each.value.allows_force_pushes, false)
+  blocks_creations                = try(each.value.blocks_creations, false)
+  enforce_admins                  = try(each.value.enforce_admins, false)
+  lock_branch                     = try(each.value.lock_branch, false)
+  require_signed_commits          = try(each.value.require_signed_commits, false)
+  require_conversation_resolution = try(each.value.require_conversation_resolution, false)
+  push_restrictions               = try(each.value.push_restrictions, [])
+  force_push_bypassers            = try(each.value.force_push_bypassers, [])
+  required_linear_history         = try(each.value.required_linear_history, false)
 
-  required_status_checks {
-    strict   = true
-    contexts = null
+  dynamic "required_pull_request_reviews" {
+    for_each = each.value.required_pull_request_reviews != null ? [1] : []
+    content {
+      dismiss_stale_reviews           = try(each.value.required_pull_request_reviews.dismiss_stale_reviews, false)
+      dismissal_restrictions          = try(each.value.required_pull_request_reviews.dismissal_restrictions, [])
+      restrict_dismissals             = try(each.value.required_pull_request_reviews.restrict_dismissals, false)
+      pull_request_bypassers          = try(each.value.required_pull_request_reviews.pull_request_bypassers, [])
+      require_code_owner_reviews      = try(each.value.required_pull_request_reviews.require_code_owner_reviews, false)
+      required_approving_review_count = try(each.value.required_pull_request_reviews.required_approving_review_count, null)
+      require_last_push_approval      = try(each.value.required_pull_request_reviews.require_last_push_approval, false)
+    }
   }
 
-  required_pull_request_reviews {
-    required_approving_review_count = 0
+  dynamic "required_status_checks" {
+    for_each = each.value.required_status_checks != null ? [1] : []
+    content {
+      strict   = try(each.value.required_status_checks.strict, false)
+      contexts = try(each.value.required_status_checks.contexts, [])
+    }
   }
 }
 
 
-resource "github_branch_protection" "next-release" {
-  # Branch protection can only be enabled on private repositories if using a
-  # paid GitHub plan
-  count = var.visibility == "public" && var.has_release_branches ? 1 : 0
-
-  repository_id           = github_repository.repository.node_id
-  pattern                 = "next-*"
-  enforce_admins          = true
-  required_linear_history = false
-  allows_deletions        = false
-  allows_force_pushes     = true
-  blocks_creations        = false
-
-  required_status_checks {
-    strict   = true
-    contexts = null
-  }
+# resource "github_branch_protection" "next-release" {
+#   # Branch protection can only be enabled on private repositories if using a
+#   # paid GitHub plan
+#   count = var.visibility == "public" && var.has_release_branches ? 1 : 0
 
-  required_pull_request_reviews {
-    required_approving_review_count = 0
-  }
-}
+#   repository_id           = github_repository.repository.node_id
+#   pattern                 = "next-*"
+#   enforce_admins          = true
+#   required_linear_history = false
+#   allows_deletions        = false
+#   allows_force_pushes     = true
+#   blocks_creations        = false
+
+#   required_status_checks {
+#     strict   = true
+#     contexts = null
+#   }
+
+#   required_pull_request_reviews {
+#     required_approving_review_count = 0
+#   }
+# }

terraform/modules/github_repository/repository.tf

@@ -19,7 +19,6 @@ resource "github_repository" "repository" {
   has_projects    = var.has_projects
   has_wiki        = var.visibility == "public"
 
-
   dynamic "pages" {
     for_each = local.pages != null ? [1] : []
 

terraform/modules/github_repository/variables.tf

@@ -133,8 +133,50 @@ variable "delete_branch_on_merge" {
   default     = true
 }
 
-variable "has_release_branches" {
-  type        = bool
-  description = "Has next-* branches for releases"
-  default     = false
+variable "branch_protection_rules" {
+  description = "The branch protection rules to apply to the repository (the key of the map is the branch pattern to use)"
+  type = map(object({
+    allows_deletions                = optional(bool)
+    allows_force_pushes             = optional(bool)
+    blocks_creations                = optional(bool)
+    enforce_admins                  = optional(bool)
+    lock_branch                     = optional(bool)
+    require_signed_commits          = optional(bool)
+    require_conversation_resolution = optional(bool)
+    push_restrictions               = optional(list(string))
+    force_push_bypassers            = optional(list(string))
+    required_linear_history         = optional(bool)
+    required_pull_request_reviews = optional(object({
+      dismiss_stale_reviews           = optional(bool)
+      dismissal_restrictions          = optional(list(string))
+      restrict_dismissals             = optional(bool)
+      pull_request_bypassers          = optional(list(string))
+      require_code_owner_reviews      = optional(bool)
+      required_approving_review_count = optional(number)
+      require_last_push_approval      = optional(bool)
+    }))
+    required_status_checks = optional(object({
+      strict   = optional(bool)
+      contexts = optional(list(string))
+    }))
+  }))
+  default = {}
+}
+locals {
+  default_branch_protection_rule = {
+    "${var.default_branch}" = {
+      enforce_admins          = true
+      required_linear_history = true
+      required_status_checks = {
+        strict = true
+      }
+      required_pull_request_reviews = {
+        required_approving_review_count = 0
+      }
+    }
+  }
+  branch_protection_rules = merge(
+    local.default_branch_protection_rule,
+    var.branch_protection_rules
+  )
 }