#! /usr/bin/env bash
#
# $Header: /home/ubuntu/mnt/e9_copy/MITgcm_contrib/jmc_script/comment_out_params,v 1.1 2010/12/10 20:09:01 jmc Exp $
# $Name:  $

#  The purpose of this script is to modify parameter files
#   by commenting out lines which set a given parameter

usage()
{
    cat <<EOF

Usage:  $0  params  data_file_list
where:
  params         : is the name of the parameter to comment out
  data_file_list : is the list of parameter file to process

EOF
}

COMMANDL="$0 $@"

if [ $# -lt 2 ] ; then
  if test "x$1" != 'x-h' -a "x$1" != 'x-help' ; then
    echo ""
    echo "ERROR: Need to specify 1 parameter and (at least) 1 file to modify"
  fi
  usage ; exit
fi
VAR_NAME="$1"
shift
DATA_FILES=$*

prt=1		# 0 : no print ; 1 print modified file ; 2 more printing
tmpFile=TTT.$$

for ff in $DATA_FILES
do
  if test -f $ff ; then
    if [ $prt -ge 2 ] ; then echo ' processing file:' $ff ; fi
    flag=0
#- comment out (in $ff) all parameters from list: 'VAR_NAME'
    for yy in $VAR_NAME
    do
      if [ $prt -ge 2 ] ; then echo -n '  commenting out:' $yy ; fi
      nn=`grep -i -c "^ *$yy *=" $ff`
      if [ $nn -ge 1 ]
      then
        listN=`grep -i -n "^ *$yy *=" $ff | sed 's/:.*$//'`
        if [ $prt -ge 2 ] ; then echo " : found on line: $listN" ; fi
        for ll in $listN
        do
          if test $flag = 0 ; then cp -p -f $ff $ff.bak ; fi
          sed "$ll s/^./#&/" $ff > $tmpFile
         #diff $tmpFile $ff
          mv -f  $tmpFile $ff
          flag=1
        done
      else if [ $prt -ge 2 ] ; then echo ' : not found' ; fi
      fi
    done
    if [ $prt -ge 1 -a $flag -eq 1 ] ; then
      echo ' change file:' $ff
    fi
  else
    if [ $prt -ge 1 ] ; then echo " file '$ff' not found" ; fi
  fi
done