zfs-snapshot-browser

#!/usr/bin/env bash

set -e

####################### parse ARG ###############################
case "$1" in
  "")
    ARG="."
    ;;
  *)
    ARG="$1"
    ;;
esac

if [[ "${ARG:0:1}" == "/" ]]; then
  ABSOLUTE_PATH="$ARG"
else
  ABSOLUTE_PATH="$(pwd)/$ARG"
fi

if [ -d "$ABSOLUTE_PATH" ]; then
  FILE="$ABSOLUTE_PATH"
elif [ -f "$ABSOLUTE_PATH" ]; then
  FILE="$ABSOLUTE_PATH"
else
  echo "Error: '$ARG' is not a file or a directory."
  exit 1
fi
####################### parse ARG ###############################

# extract file basename, discount any unsafe chars
file_basename=$(basename $dir$FILE | sed "s/\///" | tr -dc 'a-zA-Z0-9_-')

snapdir="/.zfs/snapshot"
tmpdir="/tmp/snapshot-$(date +%s%N)-$file_basename"

mkdir "$tmpdir"

ln -sT "$FILE" "$tmpdir/.current"
for dir in $snapdir/*; do
  snapshot_basename=$(basename $dir)
  if [ -d "$dir$FILE" ] || [ -f "$dir$FILE" ]; then
    ln -sT "$dir$FILE" "$tmpdir/$snapshot_basename"
  fi
done

lf "$tmpdir"
rm -rf "$tmpdir"