fix: define postgres major version

Author: darora

ebssurrogate/scripts/qemu-bootstrap-nix.sh

@@ -36,7 +36,8 @@ callbacks_enabled = timer, profile_tasks, profile_roles
 EOF
 	# Run Ansible playbook
 	export ANSIBLE_LOG_PATH=/tmp/ansible.log && export ANSIBLE_REMOTE_TEMP=/mnt/tmp
-	ansible-playbook ./ansible/playbook.yml --extra-vars '{"nixpkg_mode": true, "debpkg_mode": false, "stage2_nix": false}'
+	ansible-playbook ./ansible/playbook.yml --extra-vars '{"nixpkg_mode": true, "debpkg_mode": false, "stage2_nix": false}' \
+            --extra-vars "psql_version=psql_${POSTGRES_MAJOR_VERSION}"
 }
 
 function setup_postgesql_env {
@@ -94,7 +95,8 @@ EOF
     export ANSIBLE_LOG_PATH=/tmp/ansible.log && export ANSIBLE_REMOTE_TEMP=/tmp
     ansible-playbook ./ansible/playbook.yml \
         --extra-vars '{"nixpkg_mode": false, "stage2_nix": true, "debpkg_mode": false, "qemu_mode": true}' \
-        --extra-vars "git_commit_sha=${GIT_SHA}"
+        --extra-vars "git_commit_sha=${GIT_SHA}" \
+        --extra-vars "psql_version=psql_${POSTGRES_MAJOR_VERSION}"
 }
 
 function clean_system {

qemu-arm64-nix.pkr.hcl

@@ -125,7 +125,8 @@ build {
   provisioner "shell" {
     environment_vars = [
       "POSTGRES_SUPABASE_VERSION=${var.postgres-version}",
-      "GIT_SHA=${var.git_sha}"
+      "GIT_SHA=${var.git_sha}",
+      "POSTGRES_MAJOR_VERSION=15" # TODO (darora): pass this in from vars
     ]
     use_env_var_file = true
     script = "ebssurrogate/scripts/qemu-bootstrap-nix.sh"