backup.sh

#! /usr/bin/env nix-shell
#! nix-shell -i bash -p duplicity

set -e

# location of scripts
BACKUP_SCRIPT_DIR=$HOME/backup-scripts

# hostname
MY_HOST=`hostname`

# aws config
AWS_PROFILE="backup"
AWS_S3_BUCKET="barrucadu-backup"

if [[ ! -e $BACKUP_SCRIPT_DIR/passphrase.sh ]]; then
  echo 'missing passphrase file!'
  exit 1
fi

if [[ -x "${BACKUP_SCRIPT_DIR}/host-scripts/${MY_HOST}" ]]; then
  DIR=`mktemp -d`
  trap "rm -rf $DIR" EXIT
  cd $DIR

  # generates a backup in ./$MY_HOST
  time $BACKUP_SCRIPT_DIR/host-scripts/$MY_HOST

  source $BACKUP_SCRIPT_DIR/passphrase.sh
  time                         \
    AWS_PROFILE=$AWS_PROFILE   \
    PASSPHRASE=$PASSPHRASE     \
    duplicity incremental      \
      --s3-use-new-style       \
      --asynchronous-upload    \
      --full-if-older-than 28D \
      --verbosity notice       \
      $MY_HOST                 \
      "s3+http://${AWS_S3_BUCKET}/${MY_HOST}"
else
  echo 'nothing to do!'
fi

trace.txt

Failed to import the site module
Traceback (most recent call last):
  File "/nix/store/c2k79r69qyhszcv5s9fz19k25m4i469g-python2.7-setuptools-40.2.0/lib/python2.7/site-packages/site.py", line 73, in <module>
    __boot()
  File "/nix/store/c2k79r69qyhszcv5s9fz19k25m4i469g-python2.7-setuptools-40.2.0/lib/python2.7/site-packages/site.py", line 26, in __boot
    import imp  # Avoid import loop in Python 3
  File "/nix/store/vp7mwr3wx0a8a6bg7ifg9iq1wk6n0w6j-python3-3.6.8/lib/python3.6/imp.py", line 27, in <module>
    import tokenize
  File "/nix/store/vp7mwr3wx0a8a6bg7ifg9iq1wk6n0w6j-python3-3.6.8/lib/python3.6/tokenize.py", line 33, in <module>
    import re
  File "/nix/store/vp7mwr3wx0a8a6bg7ifg9iq1wk6n0w6j-python3-3.6.8/lib/python3.6/re.py", line 142, in <module>
    class RegexFlag(enum.IntFlag):
AttributeError: module 'enum' has no attribute 'IntFlag'