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#!/bin/bash
#
# A mini-wrapper to copy a remote kobo annotation into a local one.
#

# Parameters
BASENAME="`basename $0`"
BASEFOLDER="$HOME/data/doc"
REMOTE_BASE="/mnt/sd"
REMOTE="kobo"
PATTERN="$1"

# Thanks https://serverfault.com/a/764403
#        https://serverfault.com/questions/36421/stop-ssh-login-from-printing-motd-from-the-client#38160
function silentSsh {
    local connectionString="$1"
    shift
    local commands="$*"
    if [ -z "$commands" ]; then
        commands=`cat`
    fi
    ssh -T $connectionString "$commands"
}

# Check
if [ -z "$PATTERN" ]; then
  echo "usage: $BASENAME <pattern>"
  exit 1
fi

# Dispatch
show --search "$PATTERN" | while read item; do
  #sdr="`echo $item | sed -e 's/\.pdf$//' -e 's/\.epub$//' -e 's/\.djvuf$//'`.sdr"
  basename="`echo $item | sed -e 's/\.[^.]*$//'`"
  extension="$(echo $item | sed -e "s|$basename.||")"
  sdr="$basename.sdr"

  # Check if remote file exists
  silentSsh $REMOTE <<EOT
    test -e "$REMOTE_BASE/$sdr/metadata.$extension.lua"
EOT

  # Skip if remote file does not exist
  if [ "$?" != "0" ]; then
    echo "Skipping $item as it's not available at $REMOTE..."
    continue
  fi

  echo "Processing $item..."

  # Make sure that the annotation file exists
  mkdir -p "$BASEFOLDER/$sdr"
  touch "$BASEFOLDER/$sdr/metadata.$extension.lua"

  # Make sure it's not locked by git annex
  git annex unlock "$BASEFOLDER/$sdr/metadata.$extension.lua"

  # Update
  silentSsh kobo >"$BASEFOLDER/$sdr/metadata.$extension.lua" <<EOF
    cat "$REMOTE_BASE/$sdr/metadata.$extension.lua"
EOF

  # Stage
  git add "$REMOTE_BASE/$sdr/metadata.$extension.lua"
done