diff --git a/main.sh b/main.sh
index 339cc3c..177111f 100755
--- a/main.sh
+++ b/main.sh
@@ -1,23 +1,17 @@
 #!/usr/bin/env sh
-set -ex
-
-help_text() {
-  printf "
--t path to pango formated text file
-   how to format: https://usage.imagemagick.org/text/#pango
-   as an environment variable IMAGE_TEXT not with path but the text itself
-   if -t is set the environment variable will be ignored
-
--p is a path to write the jpg to
-   as an environment variable PICTURE_PATH
-   if -p is set the environment variable will be ignored
-  "
-  exit 1
-}
-
+# takes two optional arguments
+# -t path to pango formated text file
+#    https://usage.imagemagick.org/text/#pango
+#    this can be overwritten with the text inside a env var named
+#    IMAGE_TEXT
+#
+# -p is a path to write the jpg to
+#    alternativly you can write the path into PICTURE_PATH
+set -E -o pipefail
+set -x
 export LC_ALL='C.UTF8'
-SCRIPT_DIR="$(cd -P -- "$(dirname -- "$(command -v -- "$0")")" && pwd -P)"
-export SCRIPT_DIR
+
+export SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
 
 P_PATH="$SCRIPT_DIR/label.jpg"
 I_TEXT="$(cat "$SCRIPT_DIR"/text.pango 2>/dev/null || echo 'example text')"
@@ -27,11 +21,10 @@ I_TEXT="${IMAGE_TEXT:-$I_TEXT}"
 
 while getopts "p:t:" opt
 do
-  case "$opt" in
-    p) P_PATH="$OPTARG";;
-    t) I_TEXT=$(cat "$OPTARG");;
-    *) help_text
-  esac
+   case "$opt" in
+       p) P_PATH="$OPTARG";;
+       t) I_TEXT="$OPTARG";;
+   esac
 done
 
 magick \
@@ -40,4 +33,3 @@ magick \
   -font 'FiraCode Nerd Font' \
   -pointsize 72 pango:"$I_TEXT" \
   "$P_PATH"
-