Mercurial > repos > devteam > data_manager_bwa_mem_index_builder
diff data_manager/bwa_mem_index_builder.py @ 0:36447bb36384 draft
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author | devteam |
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date | Wed, 18 Mar 2015 15:18:49 -0400 |
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children | 46066df8813d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/data_manager/bwa_mem_index_builder.py Wed Mar 18 15:18:49 2015 -0400 @@ -0,0 +1,90 @@ +#!/usr/bin/env python +#Dan Blankenberg + +import sys +import os +import tempfile +import optparse +import subprocess + +from json import loads, dumps + + +CHUNK_SIZE = 2**20 +TWO_GB = 2**30*2 + +DEFAULT_DATA_TABLE_NAME = "bwa_mem_indexes" + +def get_id_name( params, dbkey, fasta_description=None): + #TODO: ensure sequence_id is unique and does not already appear in location file + sequence_id = params['param_dict']['sequence_id'] + if not sequence_id: + sequence_id = dbkey + + sequence_name = params['param_dict']['sequence_name'] + if not sequence_name: + sequence_name = fasta_description + if not sequence_name: + sequence_name = dbkey + return sequence_id, sequence_name + +def build_bwa_index( data_manager_dict, fasta_filename, params, target_directory, dbkey, sequence_id, sequence_name, data_table_name=DEFAULT_DATA_TABLE_NAME ): + #TODO: allow multiple FASTA input files + #tmp_dir = tempfile.mkdtemp( prefix='tmp-data-manager-bwa-index-builder-' ) + fasta_base_name = os.path.split( fasta_filename )[-1] + sym_linked_fasta_filename = os.path.join( target_directory, fasta_base_name ) + os.symlink( fasta_filename, sym_linked_fasta_filename ) + if params['param_dict']['index_algorithm'] == 'automatic': + if os.stat( fasta_filename ).st_size < TWO_GB: #use 2 GB as cut off for memory vs. max of 2gb database size; this is somewhat arbitrary + index_algorithm = 'is' + else: + index_algorithm = 'bwtsw' + else: + index_algorithm = params['param_dict']['index_algorithm'] + + args = [ 'bwa', 'index', '-a', index_algorithm ] + args.append( sym_linked_fasta_filename ) + proc = subprocess.Popen( args=args, shell=False, cwd=target_directory ) + return_code = proc.wait() + if return_code: + print >> sys.stderr, "Error building index." + sys.exit( return_code ) + data_table_entry = dict( value=sequence_id, dbkey=dbkey, name=sequence_name, path=fasta_base_name ) + _add_data_table_entry( data_manager_dict, data_table_name, data_table_entry ) + +def _add_data_table_entry( data_manager_dict, data_table_name, data_table_entry ): + data_manager_dict['data_tables'] = data_manager_dict.get( 'data_tables', {} ) + data_manager_dict['data_tables'][ data_table_name ] = data_manager_dict['data_tables'].get( data_table_name, [] ) + data_manager_dict['data_tables'][ data_table_name ].append( data_table_entry ) + return data_manager_dict + +def main(): + #Parse Command Line + parser = optparse.OptionParser() + parser.add_option( '-f', '--fasta_filename', dest='fasta_filename', action='store', type="string", default=None, help='fasta_filename' ) + parser.add_option( '-d', '--fasta_dbkey', dest='fasta_dbkey', action='store', type="string", default=None, help='fasta_dbkey' ) + parser.add_option( '-t', '--fasta_description', dest='fasta_description', action='store', type="string", default=None, help='fasta_description' ) + parser.add_option( '-n', '--data_table_name', dest='data_table_name', action='store', type="string", default=None, help='data_table_name' ) + (options, args) = parser.parse_args() + + filename = args[0] + + params = loads( open( filename ).read() ) + target_directory = params[ 'output_data' ][0]['extra_files_path'] + os.mkdir( target_directory ) + data_manager_dict = {} + + dbkey = options.fasta_dbkey + + if dbkey in [ None, '', '?' ]: + raise Exception( '"%s" is not a valid dbkey. You must specify a valid dbkey.' % ( dbkey ) ) + + sequence_id, sequence_name = get_id_name( params, dbkey=dbkey, fasta_description=options.fasta_description ) + + #build the index + build_bwa_index( data_manager_dict, options.fasta_filename, params, target_directory, dbkey, sequence_id, sequence_name, data_table_name=options.data_table_name or DEFAULT_DATA_TABLE_NAME ) + + #save info to json file + open( filename, 'wb' ).write( dumps( data_manager_dict ) ) + +if __name__ == "__main__": main()