feat(iam): add prod weekly-menu GitHub OIDC role

terraform/iam_github_weekly_menu.tf

@@ -0,0 +1,115 @@
+# GitHub Actions OIDC role for .github/workflows/weekly-menu.yml.
+#
+# Trust is pinned three ways (aud, sub to main, job_workflow_ref to the
+# weekly-menu workflow at main) so no other workflow in the repo can assume it.
+# Permissions mirror the mgmt github-oidc-deploy-roles weekly-menu role, retargeted
+# to prod resources and without form-api-key (SigV4 publish path).
+
+data "aws_iam_openid_connect_provider" "github" {
+  url = "https://token.actions.githubusercontent.com"
+}
+
+data "aws_iam_policy_document" "weekly_menu_assume" {
+  statement {
+    effect  = "Allow"
+    actions = ["sts:AssumeRoleWithWebIdentity"]
+
+    principals {
+      type        = "Federated"
+      identifiers = [data.aws_iam_openid_connect_provider.github.arn]
+    }
+
+    condition {
+      test     = "StringEquals"
+      variable = "token.actions.githubusercontent.com:aud"
+      values   = ["sts.amazonaws.com"]
+    }
+
+    condition {
+      test     = "StringEquals"
+      variable = "token.actions.githubusercontent.com:sub"
+      values   = ["repo:Sea-Haven-Industries/meal-order-manager:ref:refs/heads/main"]
+    }
+
+    condition {
+      test     = "StringEquals"
+      variable = "token.actions.githubusercontent.com:job_workflow_ref"
+      values   = ["Sea-Haven-Industries/meal-order-manager/.github/workflows/weekly-menu.yml@refs/heads/main"]
+    }
+  }
+}
+
+resource "aws_iam_role" "weekly_menu" {
+  name                 = "githubdeploy-meal-order-manager-weekly-menu"
+  path                 = "/tf-managed/"
+  description          = "GitHub Actions weekly-menu scrape/publish for meal-order-manager"
+  assume_role_policy   = data.aws_iam_policy_document.weekly_menu_assume.json
+  permissions_boundary = local.boundary_arn
+  max_session_duration = 3600
+}
+
+data "aws_iam_policy_document" "weekly_menu" {
+  statement {
+    sid    = "SlackBotSecret"
+    effect = "Allow"
+    actions = [
+      "secretsmanager:GetSecretValue",
+    ]
+    resources = [var.slack_bot_secret_arn]
+  }
+
+  statement {
+    sid    = "DeployAndAppParams"
+    effect = "Allow"
+    actions = [
+      "ssm:GetParameter",
+    ]
+    resources = [
+      "arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.ssm_prefix}/deploy/api-url",
+      "arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.ssm_prefix}/deploy/form-bucket",
+      "arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.ssm_prefix}/deploy/distribution-id",
+      "arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.ssm_prefix}/deploy/form-url",
+      "arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.google_client_id_param}",
+      "arn:aws:ssm:${var.aws_region}:${local.account_id}:parameter${local.slack_channel_param}",
+    ]
+  }
+
+  statement {
+    sid    = "PublishApi"
+    effect = "Allow"
+    actions = [
+      "execute-api:Invoke",
+    ]
+    resources = [
+      "arn:aws:execute-api:${var.aws_region}:${local.account_id}:${aws_apigatewayv2_api.order_api.id}/*/GET/api/publish/settings",
+      "arn:aws:execute-api:${var.aws_region}:${local.account_id}:${aws_apigatewayv2_api.order_api.id}/*/POST/api/publish/menu",
+    ]
+  }
+
+  statement {
+    sid    = "FormObjects"
+    effect = "Allow"
+    actions = [
+      "s3:PutObject",
+    ]
+    resources = [
+      "${aws_s3_bucket.form.arn}/index.html",
+      "${aws_s3_bucket.form.arn}/archive/*.html",
+    ]
+  }
+
+  statement {
+    sid    = "InvalidateForm"
+    effect = "Allow"
+    actions = [
+      "cloudfront:CreateInvalidation",
+    ]
+    resources = [aws_cloudfront_distribution.form.arn]
+  }
+}
+
+resource "aws_iam_role_policy" "weekly_menu" {
+  name   = "weekly-menu-publish"
+  role   = aws_iam_role.weekly_menu.id
+  policy = data.aws_iam_policy_document.weekly_menu.json
+}

terraform/outputs.tf

@@ -38,6 +38,11 @@ output "orders_table_name" {
   value       = aws_dynamodb_table.orders.name
 }
 
+output "weekly_menu_role_arn" {
+  description = "OIDC role ARN for .github/workflows/weekly-menu.yml (repo secret AWS_WEEKLY_MENU_ROLE_ARN)."
+  value       = aws_iam_role.weekly_menu.arn
+}
+
 output "shared_layer_arn" {
   description = "Version ARN of the shared Lambda layer."
   value       = aws_lambda_layer_version.shared.arn