#! /usr/bin/env bash

# $Header: /home/ubuntu/mnt/e9_copy/mitgcm.org/scripts/mk_git_tarfile,v 1.6 2018/02/01 01:16:38 jmc Exp $

# download the source code from github and make a tar file
  git_repo='MITgcm';  git_code='MITgcm'
# git_repo='altMITgcm'; #git_code='MITgcm66h'
tmpFil="/tmp/"`basename $0`".$$"

umask 0002

echo 'Changing dir. to /u/u0/httpd/html/download/git_snapshot'
cd /u/u0/httpd/html/download/git_snapshot
outp=$?
if test $outp != 0 ; then
   echo " Error in cd : $outp"
   exit 1
fi
test -e $git_code && rm -rf $git_code

echo "Make a clone of $git_code from repo: $git_repo ..."
#git clone --depth 1 https://github.com/$git_repo/$git_code.git 2> $tmpFil
 git clone https://github.com/$git_repo/$git_code.git 2> $tmpFil
outp=$?
if test $outp = 0 ; then
   echo ' --> done!'
   rm -f $tmpFil
else
   echo " Error: 'git clone' returned: $outp"
   cat $tmpFil
   rm -f $tmpFil
   exit 2
fi
#  chgrp gcmpack $git_code
   chmod 775 $git_code

rm -rf MITgcm_ss_*
arName='MITgcm_ss_'`date +%Y%m%d`'.tar'

echo -n 'Creating the archive file ... '
( cd $git_code ; git archive --prefix MITgcm/ -o ../$arName master )
gzip -9 $arName
#- should check if successful, it not -> exit 3
echo 'Done!'

#chmod 664 ${arName}.gz
ls -l ${arName}*

#exit
backupDir="other_checkpoints"
if test -d ../$backupDir ; then
 #ls -ld ../$backupDir
else
  echo -n " make dir: $backupDir"
  mkdir ../$backupDir
  outp=$?
  if test $outp != 0 ; then
     echo " Error in mkdir command: $outp"
     exit 4
  else
     echo " Done"
     ls -ld ../$backupDir
  fi
fi

savRepo="${git_code}_git"
echo -n 'Make a tar file of the full git repo ...'
  test -e $savRepo.tar    && mv -f $savRepo.tar    ../$backupDir
  test -e $savRepo.tar.gz && mv -f $savRepo.tar.gz ../$backupDir
  tar -cf $savRepo.tar $git_code
  gzip -9 $savRepo.tar
#- should check if successful, it not -> exit 5
echo ' Done !'
ls -l ${savRepo}*

#-- test for new checkpoint
version_file="$git_code/doc/tag-index"
if test -f $version_file ; then
  thischkpt=`awk '/^checkpoint/{print $1; exit}' $version_file`
  short=`echo $thischkpt | sed 's/checkpoint/c/'`
  chkptar="MITgcm_$short"
  if test -f ../$chkptar.tar.gz ; then
    echo "tar file ($chkptar) exist for current tag: $thischkpt"
  else
    echo -n " ; checkpoint archive file ... "
    ( cd $git_code ; git archive --prefix MITgcm/ -o ../$chkptar $thischkpt )
    outp=$?
    if test $outp != 0 ; then
       echo " Error in 'git archive' command: $outp"
       exit 5
    else
       echo " Done"
    fi
    gzip $chkptar.tar
    ls -l $chkptar.tar*
    mv $chkptar.tar.gz ..
    #-- move previous tar file to backupDir
    cd ..
    listTar=`ls MITgcm_c*.tar.gz`
    for xx in $listTar ; do
      if test $xx != $chkptar.tar.gz ; then
        if test -f other_checkpoints/$xx ; then
          echo "error: $backupDir/$xx already exist"
        else
          echo " mv $xx $backupDir"
          mv $xx $backupDir
        # echo " Remove $xx"
        # /bin/rm -f $xx
        fi
      fi
    done
  fi
else
  echo "missing file '$version_file' !"
fi