fixup! Introduce script testing

Author: JohT

scripts/detectChangedFiles.sh

@@ -65,6 +65,20 @@ while [[ $# -gt 0 ]]; do
   shift || true # ignore error when there are no more arguments
 done
 
+exit_failed() {
+  case "$0" in
+    */sh) return 1 ;; # Script is sourced
+    *) exit 1 ;;      # Script is executed directly
+  esac
+}
+
+exit_successful() {
+  case "$0" in
+    */sh) return 0 ;; # Script is sourced
+    *) exit 0 ;;      # Script is executed directly
+  esac
+}
+
 if ${readonlyMode}; then
   echo -e "${COLOR_INFO}detectChangedFiles: Readonly mode activated. Change detection file won't be created.${COLOR_DEFAULT}" >&2
 else
@@ -74,8 +88,8 @@ fi
 # Check if the paths parameter exist
 if [ -z "${paths}" ] ; then
     echo 0 # 0=No change detected. The path list is empty. There is nothing to compare. Therefore assume that there are no changes.
-    exit 0
-fi
+    exit_successful
+  fi
 
 # Check all paths if they are valid files or valid directories
 for path in ${paths//,/ }; do
@@ -87,7 +101,7 @@ for path in ${paths//,/ }; do
     fi
     # Neither a valid directory and file
     echo -e "${COLOR_ERROR}detectChangedFiles: Error: Invalid path: ${path}${COLOR_DEFAULT}" >&2
-    exit 1
+    exit_failed
 done
 
 # Function to get file size
@@ -157,7 +171,7 @@ if [ ! -f "${hashFilePath}" ] ; then
         echo -e "${COLOR_INFO}detectChangedFiles: Skipping file creation with content (=hash) ${CURRENT_FILES_HASH}${COLOR_DEFAULT}" >&2
     fi
     echo 1 # 1=Change detected and change detection file created
-    exit 0
+    exit_successful
 fi
 
 # Assume that there is no change if the saved hash is equal to the current one.