no more stderr

lib/self-upgrade.bash

@@ -2,21 +2,19 @@
 
 # CONSTANTS
 
-[[ ! -v MAIN_TAR_GZ_URL ]] &&
-  readonly MAIN_TAR_GZ_URL="https://git.artcode.re/miaou/miaou-bash/archive/main.tar.gz"
-
 # FUNCTIONS
 
 function self_upgrade {
-  mv "$MIAOU_BASH_DIR" "$MIAOU_BASH_DIR".before_upgrade
-  if "$MIAOU_BASH_DIR".before_upgrade/install.sh upgraded; then
-    rm -rf "$MIAOU_BASH_DIR".before_upgrade
+  local backup="$MIAOU_BASH_DIR".before_upgrade
+  mv "$MIAOU_BASH_DIR" "$backup"
+  if "$backup"/install.sh upgraded; then
+    rm -rf "$backup"
     echo -n "version: "
     . "$MIAOU_BASH_DIR"/bin/miaou-bash --version
   else
     echo "ERROR: trouble during self-upgrade: revert back"
     rm -rf "$MIAOU_BASH_DIR"
-    mv "$MIAOU_BASH_DIR".before_upgrade "$MIAOU_BASH_DIR"
+    mv "$backup" "$MIAOU_BASH_DIR"
   fi
 }
 
@@ -29,6 +27,7 @@ assert_root
 current=$(miaou-bash --version)
 latest=$("$MIAOU_BASH_DIR/tools/wget_semver" artcode miaou/miaou-bash)
 if [[ "$current" == "$latest" ]]; then
+  . "$MIAOU_BASH_DIR"/bin/miaou-bash --initiate
   echo "up-to-date version: $current"
 else
   self_upgrade