new: [postgres] added ``save`` action

postgres/actions/save

@@ -0,0 +1,61 @@
+#!/bin/bash
+
+## Load action gets a first argument a DIRECTORY holding the necessary files.
+##
+##
+
+if [ -z "$SERVICE_DATASTORE" ]; then
+    echo "This script is meant to be run through 'compose' to work properly." >&2
+    exit 1
+fi
+
+usage="$exname [-h|--help] DBNAME DEST"
+
+dbname=
+postgis=
+while [ "$1" ]; do
+    case "$1" in
+        "--help"|"-h")
+            print_usage
+            exit 0
+        ;;
+        *)
+            [ -z "$dbname" ] && { dbname=$1 ; shift ; continue ; }
+            [ -z "$DEST" ] && { DEST=$1 ; shift ; continue ; }
+            err "Unexpected argument '$1'."
+            exit 1
+        ;;
+    esac
+    shift
+done
+
+
+if [ -z "$dbname" ]; then
+    err "You must provide a source database name as first argument."
+    print_usage
+    exit 1
+fi
+
+if [ -z "$DEST" ]; then
+    err "You must provide a dest file as second argument."
+    print_usage
+    exit 1
+fi
+
+if [[ "$dbname" == *"@"* ]]; then
+    IFS="@" read user dbname < <(echo "$dbname")
+fi
+
+. "$CHARM_PATH"/lib/common
+
+set -e
+
+if ! db_has_database "$dbname"; then
+    err "Can't find database '$dbname'."
+    exit 1
+fi
+
+PGM cp "$dbname" "$DEST" || {
+    die "pgm command failed !"
+}
+info "Saved database '$dbname' into '$DEST'."