ssbrowse.sh

   1 #!/bin/bash
   2 #
   3 # Browse snapshots of a given path and run meld to compare with
   4 # current directory
   5 # $1: path -- for mounted nilfs
   6
   7 ## Prepare for mounting of snapshots
   8 MOUNT=/tmp/ssmeld-$$
   9 mkdir -p $MOUNT || exit 1
  10
  11 function exitbrowse() {
  12     umount $MOUNT 2>/dev/null
  13     rmdir $MOUNT
  14     trap "" 0
  15 }
  16 trap "exitbrowse" 0 2 9 15
  17
  18 ARG1="${1-/backup}"
  19 DF=( $(df $ARG1 | awk '{d=$1;p=$NF;} END {printf "%s %s", d, p;}') )
  20
  21 NILFSROOT="${DF[1]}"
  22 NILFSDEV="${DF[0]}"
  23 PTR="${ARG1#$NILFSROOT}"
  24 DIR0="$MOUNT$PTR"
  25 DIR1="$NILFSROOT"
  26
  27 function snap2iselect() {
  28     lscp -r -s $NILFSDEV  | while read CNO DATE TIME REST ; do
  29         [ $CNO = CNO ] && continue
  30         echo "  <s:$CNO> [$CNO] ${DATE} ${TIME}"
  31     done
  32 }
  33
  34 function dirof() {
  35     x="${1%%|*}"
  36     x="${x%%(*}"
  37     echo "${x}" | sed 's/\(\S\+\s\+\)\{8\}//;s/\s*$//'
  38 }
  39
  40 function dirsdiff() {
  41     while true ; do
  42         LEFT="$(cd $DIR0/${1#/} && ls -l)"
  43         RIGHT="$(cd $DIR1/${1#/} && ls -l)"
  44         SEL="$(diff -W 500 -y --left-column <(echo "$LEFT") <(echo "$RIGHT")| \
  45              column -t | \
  46              iselect -n "($CNO ~ $DIR1)" -K -kd -kx -kz -a -t "${1-/}" )"
  47         KEY="${SEL%%:*}"
  48         SEL="${SEL#*:}"
  49         [ -z "$SEL" ] && break
  50         case "$KEY" in
  51             RETURN|KEY_RIGHT)
  52                 ZEL="$(echo "${SEL}" | sed 's/^>\s*//;s/\s*$//')"
  53                 if [ -z "${ZEL##d*}" ] ; then
  54                     D="$(dirof "$ZEL")"
  55                     dirsdiff "$1/$D" || return 1
  56                 else
  57                     D="$(dirof "$ZEL")"
  58                     diff -D "$CNO" -N $DIR0/${1#/}/$D $DIR1/${1#/}/$D |\
  59                         less
  60
  61                 fi
  62                 ;;
  63             d) # Find next dept-first difference
  64                 :
  65                 ;;
  66             x) # Exit
  67                 return 1
  68                 ;;
  69             *)
  70                 echo "*** ${KEY}:${SEL}"
  71                 read x
  72                 ;;
  73         esac
  74     done
  75 }
  76
  77 N=2
  78 while true ; do
  79     SNAPS="$(snap2iselect)"
  80     CNO="$(iselect -n "($DIR1/)" \
  81                   -t "Snapshots for $NILFSDEV=$NILFSROOT" -p $N -P \
  82                   "Select snapshot" "$SNAPS")"
  83     [ -z "$CNO" ] && break
  84     N=${CNO%%:*}
  85     CNO=${CNO#*:}
  86     if sudo mount -t nilfs2 -oro,cp=$CNO $NILFSDEV $MOUNT ; then
  87         dirsdiff /
  88         sudo umount $MOUNT
  89     fi
  90 done