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1 #!/usr/bin/env python
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2 """Wrapper script using miraconvert & samtools to get BAM from MIRA.
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3 """
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4 import os
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5 import sys
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6 import shutil
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7 import subprocess
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8 import tempfile
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9
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10 def stop_err(msg, err=1):
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11 sys.stderr.write(msg+"\n")
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12 sys.exit(err)
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13
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14 def run(cmd, log_handle):
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15 try:
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16 child = subprocess.Popen(cmd, shell=True,
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17 stdout=subprocess.PIPE,
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18 stderr=subprocess.STDOUT)
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19 except Exception, err:
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20 sys.stderr.write("Error invoking command:\n%s\n\n%s\n" % (cmd, err))
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21 #TODO - call clean up?
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22 log_handle.write("Error invoking command:\n%s\n\n%s\n" % (cmd, err))
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23 sys.exit(1)
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24 #Use .communicate as can get deadlocks with .wait(),
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25 stdout, stderr = child.communicate()
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26 assert not stderr #Should be empty as sent to stdout
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27 if len(stdout) > 10000:
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28 #miraconvert can be very verbose (is holding stdout in RAM a problem?)
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29 stdout = stdout.split("\n")
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30 stdout = stdout[:10] + ["...", "<snip>", "..."] + stdout[-10:]
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31 stdout = "\n".join(stdout)
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32 log_handle.write(stdout)
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33 return child.returncode
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34
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35 def make_bam(mira_convert, maf_file, fasta_file, bam_file, log_handle):
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36 if not os.path.isfile(mira_convert):
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37 return "Missing binary %r" % mira_convert
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38 if not os.path.isfile(maf_file):
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39 return "Missing input MIRA file: %r" % maf_file
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40 if not os.path.isfile(fasta_file):
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41 return "Missing padded FASTA file: %r" % fasta_file
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42
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43 log_handle.write("\n====================== Converting MIRA assembly to SAM =======================\n")
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44 tmp_dir = tempfile.mkdtemp()
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45 sam_file = os.path.join(tmp_dir, "x.sam")
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46
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47 # Note add nbb to the template name, possible MIRA 4.0 RC4 bug
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48 cmd = '"%s" -f maf -t samnbb "%s" "%snbb"' % (mira_convert, maf_file, sam_file)
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49 return_code = run(cmd, log_handle)
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50 if return_code:
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51 return "Error %i from command:\n%s" % (return_code, cmd)
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52 if not os.path.isfile(sam_file):
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53 return "Conversion from MIRA to SAM failed"
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54
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55 log_handle.write("\n================= Converting MIRA assembly from SAM to BAM ===================\n")
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56 #Also doing SAM to (uncompressed) BAM during depad
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57 bam_stem = bam_file + ".tmp" # Have write permissions and want final file in this folder
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58 cmd = 'samtools depad -S -u -T "%s" "%s" | samtools sort - "%s"' % (fasta_file, sam_file, bam_stem)
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59 return_code = run(cmd, log_handle)
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60 if return_code:
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61 return "Error %i from command:\n%s" % (return_code, cmd)
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62 if not os.path.isfile(bam_stem + ".bam"):
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63 return "samtools depad or sort failed to produce BAM file"
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64
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65 os.remove(sam_file)
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66 os.rmdir(tmp_dir)
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67
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68 log_handle.write("\n====================== Indexing MIRA assembly BAM file =======================\n")
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69 cmd = 'samtools index "%s.bam"' % bam_stem
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70 return_code = run(cmd, log_handle)
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71 if return_code:
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72 return "Error %i from command:\n%s" % (return_code, cmd)
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73 if not os.path.isfile(bam_stem + ".bam.bai"):
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74 return "samtools indexing of BAM file failed to produce BAI file"
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75
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76 shutil.move(bam_stem + ".bam", bam_file)
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77 os.remove(bam_stem + ".bam.bai") #Let Galaxy handle that...
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78
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79 return None #Good :)
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80
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81 if __name__ == "__main__":
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82 mira_convert, maf_file, fasta_file, bam_file = sys.argv[1:]
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83 msg = make_bam(mira_convert, maf_file, fasta_file, bam_file, sys.stdout)
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84 if msg:
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85 stop_err(msg)
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