Wrapper for duplicity for backing up system files and user directories (with local exclusion configuration)

gistfile1.sh

#!/bin/bash

#
# Perform a system backup and backups of the specified additional
# directories (ADD_DIRS).
# The additional directories are checked for the exclusion file
# '.backup-exclude-list', holding relative paths, line-by-line.
# Alternatively directories can be excluded by putting the file
# '.backup-ignore' in the corresponding location (sub-directries
# are also excluded from the backup).
#

#---------------------------------------------------
# configuration section
#---------------------------------------------------

PROTOCOL=scp
HOST=u12345.your-backup.de
USER=u12345
PASSWORD=secret

# symmetric encryption
export PASSPHRASE='a-secret-password'

# additional directories to be backuped
ADD_DIRS=("/home/user1" "/home/user2" "/home/user3")

# number of full backups to keep
KEEP_FULL_BACKUPS=3

# end
#---------------------------------------------------


BACKUP_DESTINATION="$PROTOCOL://$USER:$PASSWORD@$HOST"

# system backup (configuration)

duplicity cleanup                                                         \
  --extra-clean                                                           \
  ${BACKUP_DESTINATION}/system                                            \
  --log-file /var/log/duplicity.log                                       \
  --verbosity error                                                       \
  $(if [ "$1" != '--dry-run' ]; then echo '--force'; fi)                  \
  >/dev/null                                                              \
                                                                          \
&&                                                                        \
                                                                          \
duplicity                                                                 \
  --full-if-older-than 1W                                                 \
  $(excl=""; for DIR in ${ADD_DIRS[@]}; do excl="$excl --exclude ${DIR}"; done; echo $excl) \
  --include '/etc'                                                        \
  --include '/boot'                                                       \
  --exclude '**'                                                          \
  /                                                                       \
  ${BACKUP_DESTINATION}/system                                            \
  --log-file /var/log/duplicity.log                                       \
  --verbosity error                                                       \
  $(if [ "$1" == '--dry-run' ]; then echo '--dry-run'; fi )               \
  $(if [ "$1" != '--dry-run' ]; then echo '--no-print-statistics'; fi )   \
                                                                          \
&&                                                                        \
                                                                          \
duplicity remove-all-but-n-full                                           \
  ${KEEP_FULL_BACKUPS}                                                    \
  ${BACKUP_DESTINATION}/system                                            \
  --log-file /var/log/duplicity.log                                       \
  --verbosity error                                                       \
  $(if [ "$1" != '--dry-run' ]; then echo '--force'; fi)




# backup of additional directories

for DIR in ${ADD_DIRS[@]}
do
  duplicity cleanup                                                       \
    --extra-clean                                                         \
    ${BACKUP_DESTINATION}${DIR}                                           \
    --log-file /var/log/duplicity.log                                     \
    --verbosity error                                                     \
    $(if [ "$1" != '--dry-run' ]; then echo '--force'; fi)                \
    >/dev/null                                                            \
                                                                          \
  &&                                                                      \
                                                                          \
  duplicity                                                               \
    --full-if-older-than 1W                                               \
    --exclude-if-present '.backup-ignore'                                 \
    $(if [ -e ${DIR}/.backup-exclude-list ]
      then
        excl=""
        while read line
        do
          [ -z "$line" ] && continue # skip empty lines
          excl="$excl --exclude ${DIR}/$line"
        done <"${DIR}/.backup-exclude-list"
        echo "$excl "
      fi)                                                                 \
    ${DIR}                                                                \
    ${BACKUP_DESTINATION}${DIR}                                           \
    --log-file /var/log/duplicity.log                                     \
    --verbosity error                                                     \
    $(if [ "$1" == '--dry-run' ]; then echo '--dry-run'; fi )             \
    $(if [ "$1" != '--dry-run' ]; then echo '--no-print-statistics'; fi ) \
                                                                          \
  &&                                                                      \
                                                                          \
  duplicity remove-all-but-n-full                                         \
    ${KEEP_FULL_BACKUPS}                                                  \
    ${BACKUP_DESTINATION}${DIR}                                           \
    --log-file /var/log/duplicity.log                                     \
    --verbosity error                                                     \
    $(if [ "$1" != '--dry-run' ]; then echo '--force'; fi)
done

# unset confidential variables
unset PASSPHRASE