cmd/import-rdiff-backup-cmd.sh

   1 #!/usr/bin/env bash
   2
   3 set -o pipefail
   4
   5 must() {
   6     local file=${BASH_SOURCE[0]}
   7     local line=${BASH_LINENO[0]}
   8     "$@"
   9     local rc=$?
  10     if test $rc -ne 0; then
  11         echo "Failed at line $line in $file" 1>&2
  12         exit $rc
  13     fi
  14 }
  15
  16 usage() {
  17     echo "Usage: bup import-rdiff-backup [-n]" \
  18         "<path to rdiff-backup root> <backup name>"
  19     echo "-n,--dry-run: just print what would be done"
  20     exit 1
  21 }
  22
  23 control_c() {
  24     echo "bup import-rdiff-backup: signal 2 received" 1>&2
  25     exit 128
  26 }
  27
  28 must trap control_c INT
  29
  30 dry_run=
  31 while [ "$1" = "-n" -o "$1" = "--dry-run" ]; do
  32     dry_run=echo
  33     shift
  34 done
  35
  36 bup()
  37 {
  38     $dry_run "${BUP_MAIN_EXE:=bup}" "$@"
  39 }
  40
  41 snapshot_root="$1"
  42 branch="$2"
  43
  44 [ -n "$snapshot_root" -a "$#" = 2 ] || usage
  45
  46 if [ ! -e "$snapshot_root/." ]; then
  47     echo "'$snapshot_root' isn't a directory!"
  48     exit 1
  49 fi
  50
  51
  52 backups=$(must rdiff-backup --list-increments --parsable-output "$snapshot_root") \
  53     || exit $?
  54 backups_count=$(echo "$backups" | must wc -l) || exit $?
  55 counter=1
  56 echo "$backups" |
  57 while read timestamp type; do
  58     tmpdir=$(must mktemp -d import-rdiff-backup-XXXXXXX) || exit $?
  59
  60     echo "Importing backup from $(date -d @$timestamp +%c) " \
  61         "($counter / $backups_count)" 1>&2
  62     echo 1>&2
  63
  64     echo "Restoring from rdiff-backup..." 1>&2
  65     must rdiff-backup -r $timestamp "$snapshot_root" "$tmpdir"
  66     echo 1>&2
  67
  68     echo "Importing into bup..." 1>&2
  69     TMPIDX=$(must mktemp -u import-rdiff-backup-idx-XXXXXXX) || exit $?
  70     must bup index -ux -f "$tmpidx" "$tmpdir"
  71     must bup save --strip --date="$timestamp" -f "$tmpidx" -n "$branch" "$tmpdir"
  72     must rm -f "$tmpidx"
  73
  74     must rm -rf "$tmpdir"
  75     counter=$((counter+1))
  76     echo 1>&2
  77     echo 1>&2
  78 done