Generating branch-environment-map for Github Actions

iac/terraform/core/branch-environment-map.json

@@ -0,0 +1 @@
+{"dev":"dev","main":"staging","prod":"production"}

iac/terraform/core/main.tf

@@ -3,4 +3,29 @@ locals {
     for pipeline in var.pipelines :
     pipeline.environment => pipeline.aws_iam_user.name == null ? true : false
   })
+
+  branch_environment_map = {
+    for pipeline in values(var.pipelines): 
+      pipeline.branch => pipeline.environment
+  }
 }
+
+# Create branch-environment-map.json with branches/patterns as keys
+# and environments as values
+
+resource "null_resource" "branch_environment_map" {
+
+  triggers = {
+    branches_changed      = jsonencode(keys(local.branch_environment_map))
+    environments_changed  = jsonencode(values(local.branch_environment_map))
+    #always_run = timestamp()
+  }
+
+  provisioner "local-exec" {
+    command = <<EOF
+      echo '${jsonencode(local.branch_environment_map)}' \
+        > branch-environment-map.json
+    EOF
+  }
+
+}