#!/bin/bash
# $Header: /home/ubuntu/mnt/e9_copy/MITgcm/tools/f90mkdepend,v 1.5 2010/05/01 17:48:17 jahn Exp $
# $Name:  $
#
# Generate some make file dependency entries for a Fortran 90 file that employs "use".
#
# For every "use" statement, generate a dependency on tolower(modulename).o
#
# Note: We assume that the name of a module and the same of source are the same.
#       The name of the source file should be all lower case (except for the extension).

# don't complain if *.F90 doesn't match any files
shopt -s nullglob

cat /dev/null > f90mkdepend.log

for filename in *.F90 *.F *.h; do
  # quick check for "use" to speed up processing
  if grep -i '^ *use ' $filename > /dev/null; then
    # extract module name in lower case
    modreflist=$(grep -i '^ *use ' $filename | awk '{sub(/,.*/,"",$2); print tolower($2)}')

    echo "$filename => $modreflist" >> f90mkdepend.log

    # change .F90 into .f90, .F into .f for target
    preprocessed=$(echo $filename | sed -e 's/\.F$/.f/' -e 's/\.F90$/.f90/')

    depline="$preprocessed:"
    for m in $modreflist; do
      # ignore modules that don't have an appropriately named source file
      if [ -f $m.F90 ] || [ -f $m.F ]; then
        depline="$depline $m.o"
      fi
    done
    echo $depline
  fi
done