#! /bin/sh
#
# RTEMS Documentation Project
#
# Copyright 2017 Chris Johns <chrisj@rtems.org>
# All rights reserved
#
# Public domain
#

#
# Exit on error.
#
set -e

#
# Executables
#
cp=/bin/cp
curl=/usr/local/bin/curl
diff=/usr/bin/diff
mkdir=/bin/mkdir
mv=/bin/mv
tar=/usr/bin/tar
touch=/usr/bin/touch
rm=/bin/rm

#
# Top directory
#
top=$PWD

#
# Directory of the latest build.
#
latest=latest

#
# Directory of the current website build.
#
current=current

#
# Directory of the current website build.
#
new=new

#
# New doxygen file.
#
latest_doxygen=rtems-doxygen-latest.tar.gz

#
# The build tags files.
#
latest_tags=${latest}/.tags
current_tags=${current}/.tags
new_tags=${new}/.tags

#
# Branches to install as current
#
branches="master 4.11"

#
# Logging.
#
log() {
 echo $* >> ${log_file}
}
log_file=${top}/unpack.log
for f in 4 3 2 1
do
 t=`expr $f + 1`
 ${rm} -f ${top}/unpack-${t}.log
 if [ -f ${top}/unpack-${f}.log ]; then
  ${mv} ${top}/unpack-${f}.log ${top}/unpack-${t}.log
 fi
done
if [ -f ${top}/unpack.log ]; then
 ${mv} ${top}/unpack.log ${top}/unpack-1.log
fi
${rm} -rf ${log_file}

# Unpack the latest build and check if the hashes match and if different update
# the current with the latest.

log "RTEMS Doxygen Unpack: " `date`

if [ ! -d ${current} ]; then
 log "error: no current website found"
 exit 1
fi

#
# Remove any new website if there is one hanging about.
#
log ${rm} -rf ${new}
${rm} -rf ${new}
log ${mkdir} ${new}
log ${cp} -r ${current} ${new}
${cp} -r ${current} ${new}

#
# Unpack the latest website.
#
log ${rm} -rf ${latest}
${rm} -rf ${latest}
log ${mkdir} ${latest}
${mkdir} ${latest}
cd latest
 log ${tar} Jxf ../${latest_doxygen}
 ${tar} Jxf ../${latest_doxygen}
 cd ..

#
# if no current tag file create an empty one.
#
if [ ! -f ${current_tags} ]; then
 log touch ${current_tags}
 ${touch} ${current_tags}
fi

if [ -f ${latest_tags} ]; then
 #
 # Check each branch to see if the tags match.
 #
 for b in ${branches}
 do
  latest_hash=$(cat ${latest_tags} | grep ${b} | sed -e 's/.* //')
  current_hash=$(cat ${current_tags} | grep ${b} | sed -e 's/.* //')
  log "Latest ${b} hash: ${latest_hash}"
  log "Current ${b} hash: ${current_hash}"
  if [ ! -z "${latest_hash}" \
	 -a "${latest_hash}" != "${current_hash}" ]; then
   src=${latest}/${b}
   hash=${latest_hash}
   if [ -d ${src} ]; then
    log "New: ${b} from ${src} (${hash})"
    log rm -rf ${new}/${b}
    rm -rf ${new}/${b}
    log cp -r ${src} ${new}/${b}
    ${cp} -r ${src} ${new}/${b}
    log "Update ${b} in tags"
    cat ${new_tags} | grep -v ${b} > ${new_tags}.tmp
    echo "${b} ${hash}" >> ${new_tags}.tmp
    rm -f ${new_tags}
    mv ${new_tags}.tmp ${new_tags}
   fi
  fi
 done
else
 log "No tags found in the latest doxygen"
fi

exit 0