#!/bin/bash

#
# install-pandoc
#
# Copyright (C) 2009-12 by RStudio, Inc.
#
# Unless you have received this program directly from RStudio pursuant
# to the terms of a commercial license agreement with RStudio, then
# this program is licensed to you under the terms of version 3 of the
# GNU Affero General Public License. This program is distributed WITHOUT
# ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
# AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
#
#

set -e

# install dir
INSTALL_DIR=`pwd`

# determine platform
PLATFORM=`uname`

# use curl or wget as appropriate
download()
{
  if [ "$PLATFORM" == "Darwin" ]
  then
    curl -L https://s3.amazonaws.com/rstudio-buildtools/$1 > $1
  else
    wget https://s3.amazonaws.com/rstudio-buildtools/$1 -O $1
  fi
}

# get pandoc
PANDOC_VERSION=1.15.2
PANDOC_DIR=pandoc/$PANDOC_VERSION
if [ -d "$PANDOC_DIR" ]
then
   echo "pandoc ${PANDOC_VERSION} already installed"
else
   PANDOC_NAME=pandoc-${PANDOC_VERSION}
   PANDOC_ZIP=${PANDOC_NAME}.zip
   download $PANDOC_ZIP
   unzip -q $PANDOC_ZIP
   mkdir -p ${PANDOC_DIR}
   if [ "$PLATFORM" == "Darwin" ]
   then
      cp ${PANDOC_NAME}/mac/pandoc* ${PANDOC_DIR}
   else
      ARCH=`uname -m`
      # copy binaries for appropriate distro/arch. 
      if grep -q -i -s "release 5" /etc/redhat-release
      then
         BINARY_TYPE=rpm

         # rhel5 itself won't use these, but we also build for sles on rhel5
         PANDOC_STATIC_DIR=${PANDOC_DIR}/static
         mkdir -p ${PANDOC_STATIC_DIR}
         cp ${PANDOC_NAME}/linux/debian/${ARCH}/pandoc* ${PANDOC_STATIC_DIR}
      else 
         BINARY_TYPE=debian
      fi
      cp ${PANDOC_NAME}/linux/${BINARY_TYPE}/${ARCH}/pandoc* ${PANDOC_DIR}
   fi
   rm $PANDOC_ZIP
   rm -rf $PANDOC_NAME
fi

# back to install dir
cd $INSTALL_DIR
