#!/bin/bash

######################################################################

#

#   symlink.sh -- This function provides an interface for ln command.

#   It mainly exists to creates symbolic links based on information

#   set in configuration files that have symlink as value to

#   render-type option. In these sections, the render-from and

#   link-target options are used to specify the link locations. The

#   link-options option might be used to pass additional options to ln

#   command.

#

#   Written by:

#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013

#

# Copyright (C) 2009-2013 The CentOS Artwork SIG

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or (at

# your option) 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

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#

######################################################################

function symlink {

    # Define absolute path to command used to create symbolic links.

    local LN=/bin/ln

    # Retrieve command options (values are not required here). Just

    # grant you are always creating symbolic links.

    local LN_OPTIONS=$(tcar_getConfigValue "${CONFIGURATION}" "${SECTION}" "link-options")

    LN_OPTIONS="-si ${LN_OPTIONS}"

    # Retrieve link source. This is the file you want to link. This

    # file is generally inside the repository.

    local LN_SOURCE=${RENDER_FROM}

    tcar_checkFiles -ef ${LN_SOURCE}

    # Retrieve link target. This is the link you want to create. This

    # link may be inside or outside the repository. The value passed

    # to this value must be a directory because it is concatenated

    # with the section name to build the final path where link will be

    # created.

    local LN_TARGET=$(tcar_getConfigValue "${CONFIGURATION}" "${SECTION}" "link-target")

    tcar_checkFiles -ed ${LN_TARGET}

    LN_TARGET=${LN_TARGET}/${SECTION}

    # Print action message.

    tcar_printMessage "${LN_TARGET}" --as-creating-line

    # Create link interactively.

    ${LN} ${LN_OPTIONS} ${LN_SOURCE} ${LN_TARGET}

}