#!/bin/sh
#
# Jitsi, the OpenSource Java VoIP and Instant Messaging client.
#
# Distributable under LGPL license.
# See terms of license at gnu.org.
#

# sources.list setting for Jitsi updates.
REPOCONFIG="deb http://download.jitsi.org/deb unstable/"

SOURCES_PREAMBLE="### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out this entry, but any other modifications may be lost.\n"

APT_CONFIG="`which apt-config 2> /dev/null`"

# Install the repository signing key
install_key() {
  APT_KEY="`which apt-key 2> /dev/null`"
  if [ -x "$APT_KEY" ]; then
    "$APT_KEY" add - >/dev/null 2>&1 <<KEYDATA
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.10 (GNU/Linux)
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=lUEu
-----END PGP PUBLIC KEY BLOCK-----
KEYDATA
  fi
}

# Parse apt configuration and return requested variable value.
apt_config_val() {
  APTVAR="$1"
  if [ -x "$APT_CONFIG" ]; then
    "$APT_CONFIG" dump | sed -e "/^$APTVAR /"'!d' -e "s/^$APTVAR \"\(.*\)\".*/\1/"
  fi
}

# Set variables for the locations of the apt sources lists.
find_apt_sources() {
  APTDIR=$(apt_config_val Dir)
  APTETC=$(apt_config_val 'Dir::Etc')
  APT_SOURCES="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourcelist')"
  APT_SOURCESDIR="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourceparts')"
}

# Add the Jitsi repository to the apt sources.
# Returns:
# 0 - sources list was created
# 2 - error
create_sources_lists() {
  if [ ! "$REPOCONFIG" ]; then
    return 0
  fi

  find_apt_sources

  SOURCELIST="$APT_SOURCESDIR/jitsi.list"

  # Check if the correct repository configuration is in there.
  REPOMATCH=$(grep "^[[:space:]#]*\b$REPOCONFIG\b" "$SOURCELIST" \
    2>/dev/null)

  # Don't do anything if the file is there, since that probably means
  # we have already installed it
  if [ -r "$SOURCELIST" ]; then
    if [ ! "$REPOMATCH" ]; then
        # At this point wrong configuration is active. In that case,
        # just abandon the mess and recreate the file
        # with the correct configuration.
        printf "$SOURCES_PREAMBLE" > "$SOURCELIST"
        printf "$REPOCONFIG\n" >> "$SOURCELIST"

        if [ $? -eq 0 ]; then
            return 0
        fi
        return 2
    fi
  fi

  if [ -d "$APT_SOURCESDIR" ]; then
    printf "$SOURCES_PREAMBLE" > "$SOURCELIST"
    printf "$REPOCONFIG\n" >> "$SOURCELIST"
    if [ $? -eq 0 ]; then
      return 0
    fi
  fi
  return 2
}

## MAIN ##
install_key
create_sources_lists