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

#
# Exit on error.
#
set -e

#
# Executables
#
git=/usr/local/bin/git

#
# Top directory
#
top=$PWD

#
# Directory of builds.
#
output=${top}/output

#
# The build tags files.
#
tags=${output}/.tags

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

#
# Branch hash cache
#
hash_cache=${top}/git-hash-cache

#
# Git repository.
#
repo=rtems-docs.git

#
# Update path to include the user installed tools
#
PATH=$PATH:/usr/local/bin

#
# Logging.
#
log() {
 echo $* >> ${log_file}
}
log_file=${top}/build.log
for f in 9 8 7 6 5 4 3 2 1
do
 t=`expr $f + 1`
 rm -f ${top}/build-${t}.log
 if [ -f ${top}/build-${f}.log ]; then
  mv ${top}/build-${f}.log ${top}/build-${t}.log
 fi
done
if [ -f ${top}/build.log ]; then
 mv ${top}/build.log ${top}/build-1.log
fi
rm -rf ${log_file}

# Create or clone the repository and then check if a commit has been added on
# each branch we are interesed in and if there is a commit build the doco and
# install.

log "RTEMS Documentation Build: " `date`

log rm -f rtems-docs-latest.tar.xz rtems-docs-latest-tags
rm -f rtems-docs-latest.tar.xz rtems-docs-latest-tags

if [ ! -d ${hash_cache} ]; then
 mkdir ${hash_cache}
fi

#
# If there is no repo create it.
#
if [ ! -d ${repo} ]; then
 log git clone git://git.rtems.org/${repo} ${repo}
 ${git} clone git://git.rtems.org/${repo} ${repo} >> ${log_file} 2>&1
fi

#
# If output exists we have an existing build so clean it first.
#
builds=0
log rm -rf ${output}
rm -rf ${output}

cd ${repo}
 #
 # Fetch any updates and reset the repo to be safe.
 #
 log git fetch
 ${git} fetch >> ${log_file} 2>&1
 log git reset --hard
 ${git} reset --hard >> ${log_file} 2>&1
 for b in ${branches}
 do
  log git co ${b}
  ${git} co ${b} >> ${log_file} 2>&1
  log git pull
  ${git} pull >> ${log_file} 2>&1
  hash=`${git} log -n 1 --pretty=format:"%H"`
  build=yes
  if [ -f ${hash_cache}/${b} ]; then
   if [ ${hash} = `cat ${hash_cache}/${b}` ]; then
    build=no
   fi
  fi
  log "Building ${b} : ${build}"
  if [ ${build} = yes ]; then
   prefix=${output}/${b}
   log rm -rf ${prefix}
   rm -rf ${prefix}
   log mkdir -p ${prefix}
   mkdir -p ${prefix}
   log ./waf distclean
   ./waf distclean >> ${log_file} 2>&1
   log ./waf configure --pdf --singlehtml --prefix=${prefix}
   ./waf configure --pdf --singlehtml --prefix=${prefix} >> ${log_file} 2>&1
   log ./waf build install
   ./waf build install >> ${log_file} 2>&1
   echo ${hash} > ${hash_cache}/${b}
   echo "${b} ${hash}" >> ${tags}
   builds=$(expr ${builds} + 1)
  fi
 done
 cd ..

if [ ${builds} -gt 0 ]; then
 cd output
  #
  # Package the builds.
  #
  tar Jcf ../rtems-docs-latest.tar.xz .tags *
  cp .tags ../rtems-docs-latest-tags
  cd ..
fi

exit 0