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#!/bin/bash
#
# Keyringer key management system.
#
# Copyright (C) 2010 Silvio Rhatto - rhatto at riseup.net
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
# 
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

function keyringer_create {
  BASEDIR="$3"
  URL="$4"

  # Parse
  if [ -z "$BASEDIR" ]; then
    echo "Usage: $BASENAME <keyring> create <path> [url]"
    exit 1
  elif grep -q -e "^$KEYRING=" $CONFIG; then
    echo "Keyring $KEYRING already defined"
    exit 1
  fi

  # Setup
  if [ ! -z "$URL" ]; then
    git clone $URL $BASEDIR
    if [ "$?" != "0" ]; then
      echo "Error cloning remote $URL"
      exit 1
    fi
  else
    mkdir -p $BASEDIR/{config,keys}
    echo "# Use entries in the form of 'john@doe.com XXXXXXXX" > $BASEDIR/config/recipients
    echo "" >> $BASEDIR/config/recipients
    chmod 600 $BASEDIR/config/recipients
  fi

  # Reparse basedir to force absolute folder
  BASEDIR="`cd $BASEDIR && pwd`"

  # Add entry
  chmod 700 $BASEDIR
  echo "$KEYRING=\"$BASEDIR\"" >> $CONFIG

  # Init
  if [ ! -d "BASEDIR/.git" ]; then
    keyringer_exec git $BASEDIR init
    keyringer_exec git $BASEDIR add .
    keyringer_exec git $BASEDIR commit -m Importing
  fi
}

function keyringer_dispatch {
  BASEDIR="`keyringer_config $KEYRING`"

  # Dispatch
  if [ ! -z "$BASEDIR" ]; then
    shift 2
    keyringer_exec $ACTION $BASEDIR $*
    exit $?
  else
    echo "No keydir configured for $KEYRING"
    exit 1
  fi
}

# Config
NAME="keyringer"
CONFIG="$HOME/.$NAME"
BASENAME="`basename $0`"
KEYRING="$1"
ACTION="$2"
ACTIONS="`dirname $0`/share/$NAME"

# Load functions
LIB="`dirname $0`/lib/$NAME/functions"
source $LIB

if [ ! -e "$CONFIG" ]; then
  echo "Creating $CONFIG..."
  touch $CONFIG
  chmod 600 $CONFIG
  echo "# Keyringer config file." > $CONFIG
  echo "" >> $CONFIG
fi

if [ -z "$ACTION" ]; then
  echo "Usage: $BASENAME <keyring> <action> [arguments]"
  exit 1
fi

if [ "$ACTION" == "create" ]; then
  keyringer_create $*
elif keyringer_has_action $ACTION; then
  keyringer_dispatch $*
else
  echo "No such action $ACTION"
  exit 1
fi