Allow error code extraction from GPG by including debug output (#65)

* Don't filter GPG debug outputs, but send everything to PassFF

---------

Co-authored-by: Thomas Vogt <tuxor1337@users.noreply.github.com>
Co-authored-by: Thomas Vogt <acc-framagit@tovotu.de>

src/passff.py

@@ -6,6 +6,8 @@
 
 import json
 import os
+import re
+import shlex
 import struct
 import subprocess
 import sys
@@ -52,6 +54,24 @@ def sendMessage(encodedMessage):
     sys.stdout.flush()
 
 
+def setPassGpgOpts(env, opts_dict):
+    """ Add arguments to PASSWORD_STORE_GPG_OPTS. """
+    opts = env.get('PASSWORD_STORE_GPG_OPTS', '')
+    for opt, value in opts_dict.items():
+        re_opt = new_opt = opt
+        if value is not None:
+            re_opt = rf"{opt}(?:=|\s+)\S*"
+            new_opt = (
+                f"{opt}={shlex.quote(value)}"
+                if opt.startswith("--") else
+                f"{opt} {shlex.quote(value)}"
+            )
+        # If the user's environment sets this opt, remove it.
+        opts = re.sub(re_opt, '', opts)
+        opts = f"{new_opt} {opts}"
+    env['PASSWORD_STORE_GPG_OPTS'] = opts.strip()
+
+
 if __name__ == "__main__":
     # Read message from standard input
     receivedMessage = getMessage()
@@ -93,6 +113,7 @@ if __name__ == "__main__":
         env["HOME"] = os.path.expanduser('~')
     for key, val in COMMAND_ENV.items():
         env[key] = val
+    setPassGpgOpts(env, {'--status-fd': '2', '--debug': 'ipc'})
 
     # Set up subprocess params
     cmd = [COMMAND] + opt_args + ['--'] + pos_args