def resolve_patterns(patterns, root):
"""Resolve a list of globs/URLs into absolute filenames."""
input_files, temp_files = [], []
for pattern in patterns:
# Handle URLs in the CSSMIN_INPUT setting.
if pattern.startswith("http:"):
temp_filename = utils.temp_fetch(pattern)
input_files.append(temp_filename)
temp_files.append(temp_filename)
else:
# Ensure glob patterns are absolute.
glob_files = glob.glob(utils.make_abs(pattern, root))
# Sort filenames within the results of a single pattern.
glob_files.sort()
for filename in glob_files:
# Make sure there are no repetitions.
if filename not in input_files:
input_files.append(filename)
return input_files, temp_files
def cssmin(args):
"""Compress the configured CSS stylesheets."""
if not hasattr(args.settings, 'CSSMIN_INPUT'):
raise ImproperlyConfigured("Must provide a CSSMIN_INPUT setting")
elif not hasattr(args.settings, 'CSSMIN_OUTPUT'):
raise ImproperlyConfigured("Must provide a CSSMIN_OUTPUT setting")
root = utils.get_root(args.settings)
# Set up development mode. If nothing is specified, this will default to the
# value of `settings.DEBUG`. The `-d` and `-p` options override this value.
if args.development_mode is None:
development_mode = args.settings.DEBUG
else:
development_mode = args.development_mode
# `temp_files` have to be deleted after processing, whether minification was
# successful or not.
input_files, temp_files = resolve_patterns(args.settings.CSSMIN_INPUT, root)
try:
# Get an absolute output filename.
output_file = utils.make_abs(args.settings.CSSMIN_OUTPUT, root)
if output_file in input_files:
# This can happen if you output a '.css' file to the same directory
# you're globbing from. Remove it from the input files.
input_files.remove(output_file)
input_io = StringIO()
try:
# Populate the input StringIO.
for filename in input_files:
if filename in temp_files:
LOG.info("Reading %s" % p.basename(filename))
else:
LOG.info("Reading %s" % p.relpath(filename))
# The additional whitespace/comments will be filtered out by the
# compressor later on, unless we are in development mode, in
# which case we want the whitespace and comments.
input_io.write("/* FILE: %s */" % filename + (os.linesep * 2))
input_io.write(utils.read_from(filename))
input_io.write(os.linesep * 2)
input_io.seek(0)
output_io = open(output_file, 'w')
try:
output_io.write(utils.get_prolog(args.settings, root))
if development_mode:
LOG.info("Writing to %s" % p.relpath(output_file))
output_io.write(input_io.getvalue())
else:
# Minify and write the output.
LOG.info("Minifying and writing to %s" % p.relpath(output_file))
output_io.write(libcssmin.cssmin(input_io.read()))
finally:
output_io.close() # Clean up.
finally:
input_io.close() # Clean up.
finally:
# Clean up.
for temp_filename in temp_files:
LOG.info("Cleaning temporary file %s" % p.basename(temp_filename))
os.remove(temp_filename)