Improve json_verifier script

tools/json_verifier.py

@@ -4,16 +4,17 @@ import json
 if len(sys.argv) <= 1:
     exit(1)
 
-files = filter(len, sys.argv[1].split('\n'))
-msg = []
-for file in files:
+status = 0
+
+for file in sys.argv[1:]:
     with open(file, encoding="ISO-8859-1") as f:
         try:
             json.load(f)
         except ValueError as exception:
-            msg.append("JSON synxtax error on file: {}".format(file))
-            msg.append(str(exception))
-if msg:
-    print("\n".join(msg))
-    exit(1)
-exit(0)
+            print("JSON error in {}".format(file))
+            print(exception)
+            status = 1
+        else:
+            print("Valid {}".format(file))
+
+exit(status)

tools/travis/build_tools.sh

@@ -6,6 +6,6 @@ python3 tools/ss13_genchangelog.py html/changelog.html html/changelogs
 
 find . -name "*.php" -print0 | xargs -0 -n1 php -l
 
-find . -name "*.json" -not -path "./tgui/node_modules/*" | xargs -0 python3 ./tools/json_verifier.py
+find . -name "*.json" -not -path "./tgui/node_modules/*" -print0 | xargs -0 python3 ./tools/json_verifier.py
 
 (cd tgui && source ~/.nvm/nvm.sh && npm ci && node node_modules/gulp/bin/gulp.js --min)