2nd draft of update alternatives generator for fink py pkgs

#!/usr/bin/env python
from __future__ import print_function

# BSD license... use and abuse.  -Kurt Schwehr 2011-Aug-26

import sys


# ./make_alternatives.py gdal  epsg_tr.py esri2wkt.py gcps2vec.py gcps2wld.py gdal2tiles.py gdal2xyz.py gdal_fillnodata.py gdal_merge.py gdal_polygonize.py gdal_proximity.py gdal_retile.py gdal_sieve.py gdalchksum.py gdalident.py gdalimport.py mkgraticule.py pct2rgb.py rgb2pct.py


basename = sys.argv[1] # first module
programs = sys.argv[2:]

if basename[-3:] != '-py':
    print ('appending -py!!!!')
    basename += '-py'


# WARNING:  make sure that type_pkg or type_raw matches the install tweaks for all the bins


# update-alternatives [options] --install link name path priority [--slave link name path]...

# vpdate-alternatives --verbose --install %p/bin/virtualenv virtualenv-py %p/bin/virtualenv-py%type_pkg[python] %type_pkg[python]
print ('PostInstScript: <<')

first_line =  '  update-alternatives --verbose --install %p/bin/{programs[0]} {basename} %p/bin/{programs[0]}%type_pkg[python] %type_pkg[python] \\'.format(**locals())

print (' echo "'+first_line+'  "')
print (first_line)

slaves = programs[1:]
print ('# slaves:', slaves)

if len(slaves) >= 2:
    for program in slaves[:-1]:
        print('\t--slave %p/bin/{program} {program} %p/bin/{program}%type_pkg[python] \\'.format(program=program))
if len(slaves) >= 1:
    print('\t--slave %p/bin/{program} {program} %p/bin/{program}%type_pkg[python]'.format(program=programs[-1]))
print('''
  echo "You can inspect the links by running:"
  echo "  update-alternatives --list {basename}"
  echo "  update-alternatives --display {basename}"
'''.format(basename=basename))
print ('<<\n')

pre_rm_line = 'update-alternatives --verbose --remove {basename} %p/bin/{programs[0]}%type_pkg[python]'.format(**locals())
print ('''PreRmScript: <<
  if [ $1 != "upgrade" ]; then
     echo "{pre_rm_line}"
     {pre_rm_line}
  else
    echo "Do not remove during upgrade"
  fi
<<'''.format(**locals()))