Use library location from outside the inventory test script

tests/inventory.sh

@@ -5,6 +5,21 @@
 
 # TODO: Create whitelist (some parts from DigiKey are not electronics parts)
 
+# The location of the library can change. Supply it from outside.
+if [[ ! ${1} ]]; then
+  echo "Please specify KiCad library file."
+  echo "Usage: ./inventory.sh ../fab.kicad_sym"
+  exit 1
+fi
+
+# Check if file exists
+if [[ ! -f ${1} ]]; then
+  echo "Library file does not exist."
+  echo "Make sure the path to the library file is correct."
+  exit 1
+fi
+
+LIBRARY_FILE=${1}
 INVENTORY_URL="http://inventory.fabcloud.io/data/inv.json"
 SOURCE="Digi-Key"
 
@@ -19,7 +34,7 @@ ERRORS=0
 echo "This script looks for parts that are not in the KiCad fab library yet. In order to add parts, make sure that the manufacturer number of the part is added to the keywords section of the library symbol."
 
 # Read keywords from all KiCad fab library symbols
-KEYWORD_LINES=$(cat ../fab.kicad_sym | grep --extended-regexp --only-matching -U 'property "ki_keywords" "([^"]*)"')
+KEYWORD_LINES=$(cat ${LIBRARY_FILE} | grep --extended-regexp --only-matching -U 'property "ki_keywords" "([^"]*)"')
 KEYWORDS=""
 IFS=$'\n'
 for LINE in ${KEYWORD_LINES}; do