Rename all files to .f90

[amlrg]

Later versions of gfortran think that the extension .f signifies a F77 file. This could be remedied by changing the Makefiles and CMakeLists, but I figured might as well change the extension to .f90 given it is F90 code. Ran the following:

find -name '*.f' -exec git mv {} {}90 \;
T=$(mktemp)
for i in $(find -name "CMakeLists.txt")
do
  cat $i | perl -ne 's/\.f(?!p)/.f90/g; print;' > $T && cp $T $i
done
for i in $(find -name "Makefile")
do
  cat $i | perl -ne 's/\.f(?!p)/.f90/g; print;' > $T && cp $T $i
done

Also, the preprocessing script had a few bits where it's python2 exclusive. Changing these allows the script to work for python3 as well (maybe there is a newer version of preprocessor out there somewhere, but the link in the documentation no longer works);

sed 's/Exception,/Exception as/g' -i tools/python/preprocess-0.6.1/preprocess.py
sed 's/Error,/Error as/g' -i tools/python/preprocess-0.6.1/preprocess.py
sed 's/os.chmod(outfile, 0777)/os.chmod(outfile, 0o777)/g' -i tools/python/preprocess-0.6.1/preprocess.py
sed 's/type(outfile) in types.StringTypes/isinstance(outfile, str)/g' -i tools/python/preprocess-0.6.1/preprocess.py
sed 's/type(streamOrFileName) == types.StringType/isinstance(streamOrFileName, str)/g' -i tools/python/preprocess-0.6.1/preprocess.py
sed 's/filenameMap.has_key(basename)/basename in filenameMap/g' -i tools/python/preprocess-0.6.1/preprocess.py
sed 's/suffixMap.has_key(suffix)/suffix in suffixMap/g' -i tools/python/preprocess-0.6.1/preprocess.py

[dmorse]

Thanks very much for this! People here (Univ. of Minnesota) had recently mentioned that
it isn't compiling with the latest gfortran, and I hadn't had a chance to look into why.

I don't know the differences between python 2 and python 3 well enough to see if the modified
code will work with both versions of the language. Have you tried running the preprocessor with
both python2 and python3 interpreters?

I will have to look at the current state of the master and devel branch, and may want to ask you to
request a merge into devel rather than master. I'll get back to you about that after checking the
history.

[amlrg]

@dmorse

The modified script works with both Python3 and 2:
I tested by changing
FORPEDO=$(REPO)/tools/python/preprocess-0.6.1/preprocess.py
to
FORPEDO=python2 $(REPO)/tools/python/preprocess-0.6.1/preprocess.py
where

% python2 --version
Python 2.7.16

As for the branch, sorry for not noticing there was a devel. I can edit the pull request to point to devel if that's your preference, just let me know (or alternatively, I think you as the maintainer will probably be able to do it yourself as well).