fix: add normalization steps when reading upstream_files.txt

Author: powerslider

scripts/lint.sh

@@ -18,6 +18,11 @@ grep -P 'lint.sh' scripts/lint.sh &>/dev/null || (
   exit 255
 )
 
+# Trim leading/trailing whitespace from a single line.
+trim_ws() {
+  sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'
+}
+
 # Read excluded directories into arrays
 DEFAULT_FILES=()
 UPSTREAM_FILES=()
@@ -43,6 +48,15 @@ function read_dirs {
   local -a upstream_find_args=()
   local -a upstream_exclude_args=()
   for line in "${upstream_folders[@]}"; do
+    # Normalize and skip invalid entries to avoid matching the entire repo:
+    # - strip CR (handles CRLF files)
+    # - trim leading/trailing whitespace
+    # - skip blank lines and comment lines
+    line=${line%$'\r'}
+    line=$(printf '%s' "$line" | trim_ws)
+    [[ -z "$line" ]] && continue
+    [[ "${line:0:1}" == "#" ]] && continue
+
     if [[ "$line" == !* ]]; then
       # Excluding files with !
       upstream_exclude_args+=(! -path "./${line:1}")
@@ -51,7 +65,9 @@ function read_dirs {
     fi
   done
   # Remove the last '-o' from the arrays
-  unset 'upstream_find_args[${#upstream_find_args[@]}-1]'
+  if ((${#upstream_find_args[@]} > 0)); then
+    unset 'upstream_find_args[${#upstream_find_args[@]}-1]'
+  fi
 
   # Find upstream files
   mapfile -t UPSTREAM_FILES < <(