Add logic to prevent writing of database and email config files

Add logic so that if the environment variable
COMANAGE_REGISTRY_NO_DATABASE_CONFIG exists then the entrypoint script
will not attempt to create the database.php file. Likewise if
COMANAGE_REGISTRY_NO_EMAIL_CONFIG exists then the entrypoint script will
not attempt to create the email.php file.

comanage-registry-base/comanage_utils.sh

@@ -99,6 +99,8 @@ function comanage_utils::consume_injected_environment() {
         COMANAGE_REGISTRY_EMAIL_PORT
         COMANAGE_REGISTRY_EMAIL_ACCOUNT
         COMANAGE_REGISTRY_EMAIL_ACCOUNT_PASSWORD
+        COMANAGE_REGISTRY_NO_DATABASE_CONFIG
+        COMANAGE_REGISTRY_NO_EMAIL_CONFIG
         COMANAGE_REGISTRY_SECURITY_SALT
         COMANAGE_REGISTRY_SECURITY_SEED
         COMANAGE_REGISTRY_VIRTUAL_HOST_FQDN
@@ -192,7 +194,8 @@ function comanage_utils::enable_plugins() {
 ##########################################
 # Exec to start and become Apache HTTP Server
 # Globals:
-#   None
+#   COMANAGE_REGISTRY_NO_DATABASE_CONFIG
+#   COMANAGE_REGISTRY_NO_EMAIL_CONFIG
 # Arguments:
 #   Command and arguments to exec
 # Returns:
@@ -206,9 +209,13 @@ function comanage_utils::exec_apache_http_server() {
 
     comanage_utils::prepare_local_directory
 
-    comanage_utils::prepare_database_config
+    if [[ -z ${COMANAGE_REGISTRY_NO_DATABASE_CONFIG} ]]; then
+        comanage_utils::prepare_database_config
+    fi
 
-    comanage_utils::prepare_email_config
+    if [[ -z ${COMANAGE_REGISTRY_NO_EMAIL_CONFIG} ]]; then
+        comanage_utils::prepare_email_config
+    fi
 
     comanage_utils::prepare_https_cert_key
 
@@ -251,7 +258,9 @@ function comanage_utils::exec_cron() {
 
     comanage_utils::prepare_local_directory
 
-    comanage_utils::prepare_database_config
+    if [[ -z ${COMANAGE_REGISTRY_NO_DATABASE_CONFIG} ]]; then
+        comanage_utils::prepare_database_config
+    fi
 
     comanage_utils::wait_database_connectivity
 

docs/comanage-registry-common-environment-variables.md

@@ -161,6 +161,28 @@ provided that the file it points to exists and is readable.
 * Default: none
 * Example: IdentifierEnroller,LdapIdentifierValidator,MailmanProvisioner
 
+```COMANAGE_REGISTRY_NO_DATABASE_CONFIG```
+
+* Description: Do not write a database configuration file if environment variable is set.
+* Required: no
+* Default: not set
+* Example: 1
+* Note: If the environment variable is set to any value then the entrypoint script will
+not attempt to write the database configuration file ```database.php```. This 
+environment variable is often used with the `comanage-registry-cron` image when it
+shares a bind mounted directory with the COmanage Registry image.
+
+```COMANAGE_REGISTRY_NO_EMAIL_CONFIG```
+
+* Description: Do not write an email configuration file if environment variable is set.
+* Required: no
+* Default: not set
+* Example: 1
+* Note: If the environment variable is set to any value then the entrypoint script will
+not attempt to write the email configuration file ```email.php```. This 
+environment variable is often used with the `comanage-registry-cron` image when it
+shares a bind mounted directory with the COmanage Registry image.
+
 
 ```COMANAGE_REGISTRY_SECURITY_SALT```