Add check for sa-gen.conf , create if it does not exist

README.md

@@ -3,8 +3,9 @@
 May 2023 NOTE: `sa-gen` has been updated to 
   - Create a Google Group if it does not already exist (set in sa-gen.conf)
   - Automatically add service account emails to the specified Google Group
-  - Install gcloud sdk (if you need) with the `install_gcloud` script
-  - Use sa-gen.conf to specify variables (You must rename or copy sa-gen-default.conf to sa-gen.conf, then edit it)
+  - Install gcloud sdk with the `install_gcloud` script
+  - Edit sa-gen.conf to specify group name, group email, etc.
+  - If no sa-gen.conf exists then running sa-gen Creates a default sa-gen.conf, then stops. Edit with nano/vim
   - Generate a random alphanumeric SUFFIX for your projects (Google needs a unique project name)
   - SUFFIX may also be set manually in `sa-gen.conf` if you like
   - Prior versions of sa-gen still run, and have been put in the /old directory

sa-gen

@@ -1,5 +1,13 @@
 #!/bin/bash -v
 
+function check_config() {
+  if [ ! -f sa-gen.conf ]; then
+    cp sa-gen-default.conf sa-gen.conf
+    echo -e "\nCreated sa-gen.conf with default settings.\nEdit using nano or vim to specify a group name and email.\n"
+    exit
+  fi
+}
+
 # Display gcloud sdk organization and active admin project and enable admin APIs
 function check_prereqs() {
   gcloud organizations list
@@ -42,6 +50,7 @@ function create_service_accounts() {
 }
 
 function main() {
+  check_config
   check_prereqs
   source sa-gen.conf
   create_projects