Can now be run from any directory

starling

@@ -11,6 +11,7 @@ import datetime
 import hashlib
 import io
 import json
+import os
 import re
 import requests
 import sys
@@ -96,8 +97,8 @@ class StarlingKey:
     algorithm = 'ecdsa-sha512'
     uid_line_re = re.compile(r'^Key Uid:\s*(' + uid_re.pattern + r')\s*$')
 
-    def __init__(self, name):
-        path = f'keys/{name}.key'
+    def __init__(self, root, name):
+        path = f'{root}/keys/{name}.key'
         with io.open(path, 'rb') as fh:
             line = fh.readline().decode('utf-8').rstrip()
             match = self.uid_line_re.fullmatch(line)
@@ -132,14 +133,15 @@ class StarlingClient:
 
     amount_re = re.compile(r'^(\d+)\.(\d\d)$')
 
-    def __init__(self):
+    def __init__(self, root):
+        self.root = root
         self.tokens = self.read_tokens('main', 'payments')
-        self.api_key = StarlingKey('starling-api-key')
+        self.api_key = StarlingKey(root, 'starling-api-key')
 
     def read_tokens(self, *names):
         tokens = {}
         for name in names:
-            with io.open(f'tokens/{name}.txt') as fh:
+            with io.open(f'{self.root}/tokens/{name}.txt') as fh:
                 tokens[name] = fh.read().rstrip()
         return tokens
 
@@ -432,7 +434,8 @@ parser = argparse.ArgumentParser(
 parser.add_argument('action', help='which action to perform', nargs='*')
 args = parser.parse_args()
 
-client = StarlingClient()
+script = os.path.realpath(sys.argv[0])
+client = StarlingClient(os.path.dirname(script))
 
 action_args = args.action
 if len(action_args) == 0: