Simplify database selection
Do not require every script that sources stackrc to also
source lib/databases.
* Move use_databases() to functions
* Set DATABASE_TYPE in stackrc
* Allow setting DATABASE_TYPE in localrc to work
(use_database() essentially just sets DATABASE_TYPE at this stage
so continuing to use it is equivalent)
* Validate DATABASE_TYPE in stack.sh.
* Change sudo to postgresql user to go through root to eliminate
password prompt
* fix use_database error condition
Change-Id: Ibb080c76e6cd7c6eebbb641a894d54b1dde78ca6
diff --git a/functions b/functions
index 92c8a5f..8ab3eef 100644
--- a/functions
+++ b/functions
@@ -841,6 +841,22 @@
fi
}
+# Set the database backend to use
+# When called from stackrc/localrc DATABASE_BACKENDS has not been
+# initialized yet, just save the configuration selection and call back later
+# to validate it.
+# $1 The name of the database backend to use (mysql, postgresql, ...)
+function use_database {
+ if [[ -z "$DATABASE_BACKENDS" ]]; then
+ # The backends haven't initialized yet, just save the selection for now
+ DATABASE_TYPE=$1
+ return
+ fi
+ use_exclusive_service DATABASE_BACKENDS DATABASE_TYPE $1 && return 0
+ ret=$?
+ return $ret
+}
+
# Toggle enable/disable_service for services that must run exclusive of each other
# $1 The name of a variable containing a space-separated list of services
# $2 The name of a variable in which to store the enabled service's name