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#!/usr/bin/env python
import os
import sys
import shutil
import optparse
import tempfile
from os.path import realpath, dirname
import cascadenik
from cascadenik import mapnik
import xml.etree.ElementTree as ElementTree
from xml.etree.ElementTree import Element
except ImportError:
import lxml.etree as ElementTree
from lxml.etree import Element
except ImportError:
import elementtree.ElementTree as ElementTree
from elementtree.ElementTree import Element
def main(src_file, dest_file, **kwargs):
""" Given an input layers file and a directory, print the compiled
XML file to stdout and save any encountered external image files
to the named directory.
mmap = mapnik.Map(1, 1)
# allow [zoom] filters to work
mmap.srs = '+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null'
load_kwargs = dict([(k, v) for (k, v) in kwargs.items() if k in ('cache_dir', 'scale', 'verbose', 'datasources_cfg', 'user_styles')])
cascadenik.load_map(mmap, src_file, dirname(realpath(dest_file)), **load_kwargs)
(handle, tmp_file) = tempfile.mkstemp(suffix='.xml', prefix='cascadenik-mapnik-')
mapnik.save_map(mmap, tmp_file)
if kwargs.get('pretty'):
doc = ElementTree.fromstring(open(tmp_file, 'rb').read())
f = open(tmp_file, 'wb')
# manually unlinking seems to be required on windows
if os.path.exists(dest_file):
os.chmod(tmp_file, 0666^os.umask(0))
shutil.move(tmp_file, dest_file)
return 0
parser = optparse.OptionParser(usage="""%prog [options] <mml> <xml>""", version='%prog ' + cascadenik.__version__)
parser.set_defaults(cache_dir=None, pretty=True, verbose=False, scale=1, user_styles=[], datasources_cfg=None)
# the actual default for cache_dir is handled in load_map(),
# to ensure that the mkdir behavior is correct.
parser.add_option('-c', '--cache-dir', dest='cache_dir',
help='Cache file-based resources (symbols, shapefiles, etc) to this directory. (default: %s)' % cascadenik.CACHE_DIR)
parser.add_option('-d' , '--datasources-config', dest='datasources_cfg',
help='Use the specified .cfg file to provide local overrides to datasources and variables.',
parser.add_option('--srs', dest='srs',
help='Target srs for the compiled stylesheet. If provided, overrides default map srs in the mml. (default: None)')
parser.add_option('--2x', dest='scale', action='store_const', const=2,
help='Optionally scale all values (lengths and scale denominators) in output xml by two, suitable for display on high-resolution (e.g. iPhone) screens.')
parser.add_option('--style', dest='user_styles', action='append',
help='Look for additional styles in the named file, which will override anything provided in the MML. Any number of these can be provided.')
parser.add_option('-p', '--pretty', dest='pretty',
help='Pretty print the xml output. (default: True)',
parser.add_option('-v' , '--verbose', dest='verbose',
help='Make a bunch of noise. (default: False)',
if __name__ == '__main__':
(options, args) = parser.parse_args()
if not len(args) == 2:
parser.error('Please specify .mml and .xml files')
layersfile, outputfile = args[0:2]
print >> sys.stderr, 'output file:', outputfile, dirname(realpath(outputfile))
if not layersfile.endswith('.mml'):
parser.error('Input must be an .mml file')
if not outputfile.endswith('.xml'):
parser.error('Output must be an .xml file')
sys.exit(main(layersfile, outputfile, **options.__dict__))
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