Not robust against missing "gocryptfs"

[buhtz]

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BIT is not robust enough against missing dependencies. It throws technical errors and also exceptions.

Steps to reproduce

1. Install BIT including goryptfs.
2. Create a gocryptfs profile.
3. Close BIT.
4. Uninstall gocryptfs.
5. Start BIT again.

Problems

After /steps to reproduce/ the first error is this

But the main window opens.

Next open /Manage profiles/ and /Close/ it again.

Traceback (most recent call last):
  File "/usr/share/backintime/qt/manageprofiles/__init__.py", line 376, in accept
    if self.validate():
       ~~~~~~~~~~~~~^^
  File "/usr/share/backintime/qt/manageprofiles/__init__.py", line 332, in validate
    if not self.save_profile():
           ~~~~~~~~~~~~~~~~~^^
  File "/usr/share/backintime/qt/manageprofiles/__init__.py", line 310, in save_profile
    success = self._tab_general.store_values()
  File "/usr/share/backintime/qt/manageprofiles/tab_general.py", line 517, in store_values
    mnt.mount()
    ~~~~~~~~~^^
  File "/usr/share/backintime/common/mount/__init__.py", line 303, in mount
    self.encryptor.mount()
    ~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/share/backintime/common/mount/_encryptors.py", line 322, in mount
    with subprocess.Popen(
         ~~~~~~~~~~~~~~~~^
        cmd,
        ^^^^
    ...<3 lines>...
        universal_newlines=True
        ^^^^^^^^^^^^^^^^^^^^^^^
    ) as proc:
    ^
  File "/usr/lib/python3.13/subprocess.py", line 1039, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
    ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                        pass_fds, cwd, env,
                        ^^^^^^^^^^^^^^^^^^^
    ...<5 lines>...
                        gid, gids, uid, umask,
                        ^^^^^^^^^^^^^^^^^^^^^^
                        start_new_session, process_group)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/subprocess.py", line 1972, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'gocryptfs'
Aborted

Related to

• Better handle "suggested" and not always installed dependencies (encfs, powermgmt-base, sshfs) #1823