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comparison gatk_wrapper.py @ 0:74c05070a3f8 draft

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author jjohnson
date Thu, 01 Nov 2012 13:53:22 -0400
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-1:000000000000 0:74c05070a3f8
1 #!/usr/bin/env python
2 #Dan Blankenberg
3
4 """
5 A wrapper script for running the GenomeAnalysisTK.jar commands.
6 """
7
8 import sys, optparse, os, tempfile, subprocess, shutil
9 from binascii import unhexlify
10 from string import Template
11
12 GALAXY_EXT_TO_GATK_EXT = { 'gatk_interval':'intervals', 'bam_index':'bam.bai', 'gatk_dbsnp':'dbSNP', 'picard_interval_list':'interval_list' } #items not listed here will use the galaxy extension as-is
13 GALAXY_EXT_TO_GATK_FILE_TYPE = GALAXY_EXT_TO_GATK_EXT #for now, these are the same, but could be different if needed
14 DEFAULT_GATK_PREFIX = "gatk_file"
15 CHUNK_SIZE = 2**20 #1mb
16
17
18 def cleanup_before_exit( tmp_dir ):
19 if tmp_dir and os.path.exists( tmp_dir ):
20 shutil.rmtree( tmp_dir )
21
22 def gatk_filename_from_galaxy( galaxy_filename, galaxy_ext, target_dir = None, prefix = None ):
23 suffix = GALAXY_EXT_TO_GATK_EXT.get( galaxy_ext, galaxy_ext )
24 if prefix is None:
25 prefix = DEFAULT_GATK_PREFIX
26 if target_dir is None:
27 target_dir = os.getcwd()
28 gatk_filename = os.path.join( target_dir, "%s.%s" % ( prefix, suffix ) )
29 os.symlink( galaxy_filename, gatk_filename )
30 return gatk_filename
31
32 def gatk_filetype_argument_substitution( argument, galaxy_ext ):
33 return argument % dict( file_type = GALAXY_EXT_TO_GATK_FILE_TYPE.get( galaxy_ext, galaxy_ext ) )
34
35 def open_file_from_option( filename, mode = 'rb' ):
36 if filename:
37 return open( filename, mode = mode )
38 return None
39
40 def html_report_from_directory( html_out, dir ):
41 html_out.write( '<html>\n<head>\n<title>Galaxy - GATK Output</title>\n</head>\n<body>\n<p/>\n<ul>\n' )
42 for fname in sorted( os.listdir( dir ) ):
43 html_out.write( '<li><a href="%s">%s</a></li>\n' % ( fname, fname ) )
44 html_out.write( '</ul>\n</body>\n</html>\n' )
45
46 def index_bam_files( bam_filenames, tmp_dir ):
47 for bam_filename in bam_filenames:
48 bam_index_filename = "%s.bai" % bam_filename
49 if not os.path.exists( bam_index_filename ):
50 #need to index this bam file
51 stderr_name = tempfile.NamedTemporaryFile( prefix = "bam_index_stderr" ).name
52 command = 'samtools index %s %s' % ( bam_filename, bam_index_filename )
53 proc = subprocess.Popen( args=command, shell=True, stderr=open( stderr_name, 'wb' ) )
54 return_code = proc.wait()
55 if return_code:
56 for line in open( stderr_name ):
57 print >> sys.stderr, line
58 os.unlink( stderr_name ) #clean up
59 cleanup_before_exit( tmp_dir )
60 raise Exception( "Error indexing BAM file" )
61 os.unlink( stderr_name ) #clean up
62
63 def __main__():
64 #Parse Command Line
65 parser = optparse.OptionParser()
66 parser.add_option( '-p', '--pass_through', dest='pass_through_options', action='append', type="string", help='These options are passed through directly to GATK, without any modification.' )
67 parser.add_option( '-o', '--pass_through_options', dest='pass_through_options_encoded', action='append', type="string", help='These options are passed through directly to GATK, with decoding from binascii.unhexlify.' )
68 parser.add_option( '-d', '--dataset', dest='datasets', action='append', type="string", nargs=4, help='"-argument" "original_filename" "galaxy_filetype" "name_prefix"' )
69 parser.add_option( '', '--max_jvm_heap', dest='max_jvm_heap', action='store', type="string", default=None, help='If specified, the maximum java virtual machine heap size will be set to the provide value.' )
70 parser.add_option( '', '--max_jvm_heap_fraction', dest='max_jvm_heap_fraction', action='store', type="int", default=None, help='If specified, the maximum java virtual machine heap size will be set to the provide value as a fraction of total physical memory.' )
71 parser.add_option( '', '--stdout', dest='stdout', action='store', type="string", default=None, help='If specified, the output of stdout will be written to this file.' )
72 parser.add_option( '', '--stderr', dest='stderr', action='store', type="string", default=None, help='If specified, the output of stderr will be written to this file.' )
73 parser.add_option( '', '--html_report_from_directory', dest='html_report_from_directory', action='append', type="string", nargs=2, help='"Target HTML File" "Directory"')
74 (options, args) = parser.parse_args()
75
76 tmp_dir = tempfile.mkdtemp( prefix='tmp-gatk-' )
77 if options.pass_through_options:
78 cmd = ' '.join( options.pass_through_options )
79 else:
80 cmd = ''
81 if options.pass_through_options_encoded:
82 cmd = '%s %s' % ( cmd, ' '.join( map( unhexlify, options.pass_through_options_encoded ) ) )
83 if options.max_jvm_heap is not None:
84 cmd = cmd.replace( 'java ', 'java -Xmx%s ' % ( options.max_jvm_heap ), 1 )
85 elif options.max_jvm_heap_fraction is not None:
86 cmd = cmd.replace( 'java ', 'java -XX:DefaultMaxRAMFraction=%s -XX:+UseParallelGC ' % ( options.max_jvm_heap_fraction ), 1 )
87 bam_filenames = []
88 if options.datasets:
89 for ( dataset_arg, filename, galaxy_ext, prefix ) in options.datasets:
90 gatk_filename = gatk_filename_from_galaxy( filename, galaxy_ext, target_dir = tmp_dir, prefix = prefix )
91 if dataset_arg:
92 cmd = '%s %s "%s"' % ( cmd, gatk_filetype_argument_substitution( dataset_arg, galaxy_ext ), gatk_filename )
93 if galaxy_ext == "bam":
94 bam_filenames.append( gatk_filename )
95 index_bam_files( bam_filenames, tmp_dir )
96 #set up stdout and stderr output options
97 stdout = open_file_from_option( options.stdout, mode = 'wb' )
98 stderr = open_file_from_option( options.stderr, mode = 'wb' )
99 #if no stderr file is specified, we'll use our own
100 if stderr is None:
101 stderr = tempfile.NamedTemporaryFile( prefix="gatk-stderr-", dir=tmp_dir )
102
103 proc = subprocess.Popen( args=cmd, stdout=stdout, stderr=stderr, shell=True, cwd=tmp_dir )
104 return_code = proc.wait()
105
106 if return_code:
107 stderr_target = sys.stderr
108 else:
109 stderr_target = sys.stdout
110 stderr.flush()
111 stderr.seek(0)
112 while True:
113 chunk = stderr.read( CHUNK_SIZE )
114 if chunk:
115 stderr_target.write( chunk )
116 else:
117 break
118 stderr.close()
119 #generate html reports
120 if options.html_report_from_directory:
121 for ( html_filename, html_dir ) in options.html_report_from_directory:
122 html_report_from_directory( open( html_filename, 'wb' ), html_dir )
123
124 cleanup_before_exit( tmp_dir )
125
126 if __name__=="__main__": __main__()