fix needing to copy token.json to working dir

README.md

@@ -25,7 +25,7 @@ From project directory:
 ```
 
 ## Usage
-You can execute the **`budget`** command from anywhere **except directories that you don't have write permission.** *(Hopefully this will be fixed soon, see [issue](https://github.com/utkuufuk/google-budget/issues/2))*
+You can execute the **`budget`** command globally for spreadsheet selection and transaction entry.
 
 ### Spreadsheet Selection
 ``` sh

budget.py

@@ -8,8 +8,9 @@
 import os
 import shutil
 
-GLOBAL_TOKEN_PATH = str(Path.home()) + '/.local/share/google-budget/token.json'
-SPREADSHEET_ID_PATH = str(Path.home()) + '/.local/share/google-budget/spreadsheet.id'
+APP_DIR = str(Path.home()) + '/.local/share/google-budget/'
+GLOBAL_TOKEN_PATH = APP_DIR + 'token.json'
+SPREADSHEET_ID_PATH = APP_DIR + 'spreadsheet.id'
 
 if __name__ == '__main__':
     # validate command
@@ -43,12 +44,14 @@
         print("budget sheet <spreadsheet_id>", file=sys.stderr)
         sys.exit(1)
 
-    # temporarily copy the auth token into current dir and authorize
-    shutil.copyfile(GLOBAL_TOKEN_PATH, 'token.json')
+    # temporarily change working directory to read token.json and authorize
+    initialDir = os.getcwd()
+    os.chdir(APP_DIR)
     store = file.Storage('token.json')
     creds = store.get()
     service = build('sheets', 'v4', http=creds.authorize(Http()))
     print("Authorization successful.")
+    os.chdir(initialDir)
 
     # fetch existing data in order to find the index of the last transaction
     try:
@@ -71,4 +74,3 @@
     result = service.spreadsheets().values().update(spreadsheetId=ssheetId, range=rangeName,
                                                     valueInputOption="USER_ENTERED", body=body).execute()
     print('{0} cells updated.'.format(result.get('updatedCells')))
-    os.remove('token.json')