Add CLI option to open generated invoice

Signed-off-by: Peter Hatina <peter@hatina.eu>

lib/invoice/cli.py

@@ -77,6 +77,7 @@ class Application:
                 subparser = subparsers.add_parser(action+suffix, help=method.__doc__)
                 if method == self.do_pdf:
                     subparser.add_argument("--generate", "-g", action="store_true")
+                    subparser.add_argument("--view", "-v", action="store_true")
                 if action == "delete":
                     subparser.add_argument("--force", "-f", action="store_true")
                 if action == "new":
@@ -158,7 +159,7 @@ class Application:
         item = self.db.invoices[selector]
         self._show(item._path)
 
-    def do_pdf(self, selector, generate):
+    def do_pdf(self, selector, generate, view):
         """Generate and view a PDF invoice.
 
         This requires Tempita 0.5.
@@ -214,8 +215,9 @@ class Application:
             os.rename(tmp_pdf_file, pdf_file)
 
         assert(os.path.exists(pdf_file))
-        #log.debug("Running PDF viewer...")
-        #subprocess.call((self.pdf_program, pdf_file))
+        if view:
+            log.debug("Running PDF viewer...")
+            subprocess.call((self.pdf_program, pdf_file))
 
     def _check_path(self, path):
         if not os.path.exists(path):