I am trying to use duplicity (latest version and dependencies from MacPorts) to create .tar.bz2.gpg (compressed and encrypted) backups on a remote Linux server.
I am using --gpg-options='--compress-algo=bzip2 --bzip2-compress-level=9' as the command line option as suggested in various discussions accessible via Google.
However, the remote backups created are .tar.gpg (and hence are not compressed).
$ gpg --help
gpg (GnuPG) 1.4.10
Copyright (C) 2008 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Home: ~/.gnupg
Supported algorithms:
Pubkey: RSA, RSA-E, RSA-S, ELG-E, DSA
Cipher: 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH, CAMELLIA128,
CAMELLIA192, CAMELLIA256
Hash: MD5, SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2
So, gpg installation here does support BZIP2.