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# R Overlay -- ebuild creation, metadata creation
# Copyright 2006-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
import roverlay.config
from roverlay.portage.metadata import nodes
class MetadataJob ( object ):
"""R package description data -> metadata.xml interface."""
def __init__ ( self, package_info, logger ):
"""Initializes a MetadataJob.
arguments:
* package_info -- reserved for future usage
* logger -- logger to use (this instance won't call getChild)
"""
self.logger = logger
self._metadata = nodes.MetadataRoot()
# reserved for future usage ("dominant ebuilds": when ebuildjobs
# share one metadata instance etc.)
self.package_info = None
# --- end of __init__ (...) ---
def update ( self, desc_data, package_info ):
"""Updates the metadata using the given description data.
It's expected that this method is called when Ebuild creation is done.
arguments:
* desc_data -- description data read from R package
* package_info -- reserved for future usage
returns: None (implicit)
"""
pass
mref = self._metadata
max_textline_width = roverlay.config.get ( 'METADATA.linewidth', 65 )
have_desc = False
if 'Title' in desc_data:
mref.add ( nodes.DescriptionNode (
desc_data ['Title'],
is_long=have_desc,
linewidth=max_textline_width
) )
have_desc = True
if 'Description' in desc_data:
# passing have_desc for DescriptionNode's is_long parameter redirects
# the second description info into <longdescription.../>
mref.add ( nodes.DescriptionNode (
desc_data ['Description'],
is_long=have_desc,
linewidth=max_textline_width
) )
have_desc = True
mref.add_useflag ( 'byte-compile', 'enable byte-compiling' )
if package_info ['has_suggests']:
mref.add_useflag ( 'R_suggests', 'install optional dependencies' )
# --- end of update (...) ---
# used in some test scripts
update_metadata = update
def write ( self, _file ):
"""Writes the metadata into a file.
arguments:
* _file -- file to write, either a file handle or string in which case
a file object will be created
returns: True if writing succeeds, else False
raises: Exception if no metadata to write
"""
if self._metadata.empty():
raise Exception ( "not enough metadata to write!" )
#return False
else:
return self._metadata.write_file ( _file )
# --- end of write (...) ---
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