$duplicity_sub can't handle alphnum characters
In Ubuntu Lucid, duplicity comes in version 0.6.08b, which breaks the current method to analyse the sub-version. Nasty.
I use the Lucid version of backupninja, 0.9.6-4
duplicity --version | /usr/bin/awk '{print $2}' 0.6.08b
/usr/share/backupninja/dup: Zeile 99: [: 08b: Ganzzahliger Ausdruck erwartet. /usr/share/backupninja/dup: Zeile 105: [: 08b: Ganzzahliger Ausdruck erwartet. ... /usr/share/backupninja/dup: Zeile 166: [: 08b: Ganzzahliger Ausdruck erwartet. /usr/share/backupninja/dup: Zeile 208: [: 08b: Ganzzahliger Ausdruck erwartet. /usr/share/backupninja/dup: Zeile 228: [: 08b: Ganzzahliger Ausdruck erwartet.
(from redmine: created on 2010-03-28, closed on 2010-05-06)