def _check_use_index(self):
if self.argparse_args.use_index is None:
return
# end if
allowed_values = {'true', 'false', 'auto',}
use_index_string = self.argparse_args.use_index
if not use_index_string in allowed_values:
error_msg = '\nError: invalid value of the `--use-index` option: `{}`' \
'Allowed_values: {}' \
.format(use_index_string, ', '.join(allowed_values))
raise FatalError(error_msg)
# end if
blast_task = self.argparse_args.blast_task
if blast_task is None:
blast_task = src.blast.BLAST_TASKS[0]
# end if
blast_task_cant_use_index = use_index_string == 'true' \
and not blast_task in src.blast.TASKS_SUPPORT_INDEXED_SEARCH
if blast_task_cant_use_index:
error_msg = '\nError: BLAST task {} cannot use indexed search' \
.format(blast_task)
raise FatalError(error_msg)
def _parse_primers(self):
sep = ','
primer_pairs = list()
n_lines = sum(1 for _ in open(self.primers_fpath, 'rt'))
n_lines_is_even = n_lines % 2 == 0
if not n_lines_is_even:
error_msg = '\nError: Cannot parse primers from file `{}`.\n' \
'There are {} lines in this file.\n' \
'There must be even number of lines ' \
'(and therefore even number of primers), though.' \
.format(self.primers_fpath, self.primers_fpath)
raise FatalError(error_msg)
# end if
print('{} - Parsing primers...'.format(getwt()))
reference_seq = src.fasta.read_fasta_sequence(self.reference_fpath)
find_start_pos = 0
with open(self.primers_fpath, 'rt') as primers_file:
for _ in range(n_lines // 2):
try:
left_primer_seq, right_primer_seq = self._parse_primer_pair(
primers_file, sep)
self.max_primer_len = max(self.max_primer_len,
len(left_primer_seq),
len(right_primer_seq))
left_start, left_end = self._find_primer_anneal_coords(
left_primer_seq,
reference_seq,
Orientation.LEFT,
beg=find_start_pos)
find_start_pos = left_start
right_start, right_end = self._find_primer_anneal_coords(
src.sequences.reverse_complement(right_primer_seq),
reference_seq,
Orientation.RIGHT,
beg=find_start_pos)
primer_pairs.append(
PrimerPair(
Primer(left_start, left_end),
Primer(right_start, right_end),
))
except ValueError as err:
error_msg = '\nError: cannot parse a line in file `{}`.\n{}' \
.format(self.primers_fpath, err)
raise FatalError(error_msg)
# end try
# end for
# end with
print('{} - Primers: found annealing coordinates'.format(getwt()))
return primer_pairs
def read_fasta_sequence(file_path):
with fs.open_file_may_by_gzipped(file_path, 'rt') as fasta_file:
fasta_file.readline() # pass header
sequence = ''
line = fasta_file.readline().strip().upper()
line_counter = 1
while not (_is_header(line) or line == ''):
line_counter += 1
if not verify_sequence(line):
non_iupac_chars = get_non_iupac_chars(line)
error_msg = '\nError: a non-IUPAC character found' \
' in line #{} of file `{}`.\n' \
'Bad characters are the following:\n {}' \
.format(line_counter, file_path, ', '.join(non_iupac_chars))
raise FatalError(error_msg)
# end if
sequence += line
line = fasta_file.readline().strip().upper()
# end while
# end with
return sequence
def create_dir(dirpath):
if not os.path.exists(dirpath):
try:
os.makedirs(dirpath)
except OSError as err:
error_msg = '\nError: cannot create directory `{}`' \
.format(dirpath)
raise FatalError(error_msg)
def is_gzipped(fpath):
if fpath.endswith('.gz'):
try:
with gzip.open(fpath) as _:
pass
# end with
except gzip.BadGzipFile as err:
error_msg = '\nError: bad gzip file: {}'.format(err)
raise FatalError(error_msg)
except OSError as err:
error_msg = '\nError: cannot open file: {}'.format(err)
raise FatalError(error_msg)
# end try
else:
return False
# end if
return True
def init_file(fpath):
try:
with open(fpath, 'wt') as _:
pass
# end with
except OSError as err:
error_msg = '\nError: cannot initialize output file `{}`:\n {}' \
.format(fpath, err)
raise FatalError(error_msg)
def _check_blast_task(self):
if self.argparse_args.blast_task is None:
return
# end if
blast_task_argument = self.argparse_args.blast_task
if not blast_task_argument in src.blast.BLAST_TASKS:
error_msg = '\nError: invalid name of a blast task: `{}`.' \
'Allowed values: {}' \
.format(blast_task_argument, ', '.join(src.blast.BLAST_TASKS))
raise FatalError(error_msg)
def _check_outdpath(self):
if self.argparse_args.outdir is None:
return
# end if
try:
fs.create_dir(self.argparse_args.outdir)
except FatalErrors as err:
error_msg = '\nError: cannot create directory `{}`:\n {}' \
.format(self.argparse_args.outdir, err)
raise FatalError(error_msg)
def _check_chunk_size(self):
if self.argparse_args.chunk_size is None:
return
# end if
chunk_size_string = self.argparse_args.chunk_size
try:
_check_int_string_gt0(chunk_size_string)
except _AtoiGreaterThanZeroError as err:
error_msg = '\nError: invalid chunk size: `{}`\n {}' \
.format(chunk_size_string, err)
raise FatalError(error_msg)
def _check_threads_num(self):
if self.argparse_args.threads is None:
return
# end if
threads_num_string = self.argparse_args.threads
try:
_check_int_string_gt0(threads_num_string)
except _AtoiGreaterThanZeroError as err:
error_msg = '\nError: invalid number of threads: `{}`\n {}' \
.format(threads_num_string, err)
raise FatalError(error_msg)
def _check_min_len(self):
if self.argparse_args.min_len is None:
return
# end if
min_len_string = self.argparse_args.min_len
try:
_check_int_string_gt0(min_len_string)
except _AtoiGreaterThanZeroError as err:
error_msg = '\nError: invalid minimum length: `{}`:\n {}' \
.format(min_len_string, err)
raise FatalError(error_msg)
def _check_primer_ext_len(self):
if self.argparse_args.primer_5ext is None:
return
# end if
primer_ext_string = self.argparse_args.primer_5ext
try:
_check_int_string_ge0(primer_ext_string)
except _AtoiGreaterOrEqualToZeroError as err:
error_msg = '\nError: invalid size of primer coordinates extention: `{}`\n {}' \
.format(primer_ext_string, err)
raise FatalError(error_msg)
def _check_reads_fpaths(self):
try:
_check_file_type_combination(self.argparse_args)
except _InvalidFileCombinationError as err:
raise FatalError(str(err))
# end try
kromsatel_mode = _detect_kromsatel_mode(self.argparse_args)
try:
self._reads_files_exist(kromsatel_mode)
except FileNotFoundError as err:
raise FatalError(str(err))
# end try
# Check if paired-end read files specified are the same file
if kromsatel_mode == KromsatelModes.IlluminaPE:
if self.argparse_args.reads_R1 == self.argparse_args.reads_R2:
error_msg = '\nError: the file of forward (R1) and ' \
'the file of reverse (R2) reads are the same file:\n `{}`' \
.format(self.argparse_args.reads_R1)
raise FatalError(error_msg)
def _make_blast_db(reference_fpath, db_fpath):
makeblastdb_cmd = _configure_makeblastdb_cmd(reference_fpath, db_fpath)
pipe = sp.Popen(makeblastdb_cmd,
shell=True,
stdout=sp.PIPE,
stderr=sp.PIPE)
stdout_stderr = pipe.communicate()
if pipe.returncode != 0:
error_msg = '\nError: Cannot create a blast database' \
'{}\n Command: `{}`' \
.format(stdout_stderr[1].decode('utf-8'), makeblastdb_cmd)
raise FatalError(error_msg)
def _check_fixed_crop_len(self):
if self.argparse_args.crop_len is None:
return
# end if
crop_len_string = self.argparse_args.crop_len
auto_detect_crop_len = (crop_len_string == 'auto')
if not auto_detect_crop_len:
try:
_check_int_string_ge0(crop_len_string)
except _AtoiGreaterOrEqualToZeroError as err:
error_msg = '\nError: invalid crop length: `{}`\n {}' \
' Also, it may be `auto`.' \
.format(crop_len_string, err)
raise FatalError(error_msg)
def _index_database(db_fpath):
makembindex_cmd = _configure_makembindex_cmd(db_fpath)
pipe = sp.Popen(makembindex_cmd,
shell=True,
stdout=sp.PIPE,
stderr=sp.PIPE)
stdout_stderr = pipe.communicate()
if pipe.returncode != 0:
error_msg = '\nError: Cannot index the blast database `{}`' \
'{}\n Command: `{}`' \
.format(db_fpath, stdout_stderr[1].decode('utf-8'), makembindex_cmd)
raise FatalError(error_msg)
def _check_mandatory_args(self):
mandatory_args = (
self.argparse_args.primers,
self.argparse_args.reference,
)
mandarory_args_descriptions = (
'-p/--primers',
'-r/--reference',
)
for arg, description in zip(mandatory_args, mandarory_args_descriptions):
if arg is None:
error_msg = '\nError: argument {} is mandatory'.format(description)
raise FatalError(error_msg)
def check_program(program):
# Check if program is in PATH
pathdirs = os.environ['PATH'].split(os.pathsep)
utility_found = False
for directory in pathdirs:
if os.path.exists(directory) and program in os.listdir(directory):
utility_found = True
break
# end if
# end for
if not utility_found:
error_msg = '\nError: program `{}` from BLAST+ toolkit is not installed.' \
'If this error still occures although you have installed everything' \
' -- make sure that this program is added to PATH)' \
.format(program)
raise FatalError(error_msg)
def _detect_kromsatel_mode(argparse_args):
read_pass_string = _create_read_pass_string(argparse_args)
if read_pass_string == 'FRl':
return KromsatelModes.IlluminaPE
elif read_pass_string == 'frL':
return KromsatelModes.Nanopore
elif read_pass_string == 'Frl':
return KromsatelModes.IlluminaSE
# end if
# Execution should not reach here
error_msg = '\nInternal error. Please, contact the developer' \
' and tell him abouth this error.\n' \
'Error description: "kromsatel mode error in _detect_kromsatel_mode".'
raise FatalError(error_msg)
def blast_align(reads_chunk, kromsatel_args):
query_fpath = os.path.join(kromsatel_args.tmp_dir_path,
'kromsatel_query_{}.fasta'.format(os.getpid()))
src.fastq.write_fastq2fasta(reads_chunk, query_fpath)
alignment_fpath = os.path.join(
kromsatel_args.tmp_dir_path,
'kromsatel_alignment_{}.json'.format(os.getpid()))
if kromsatel_args.kromsatel_mode == KromsatelModes.Nanopore:
blast_cmd = _configure_blastn_cmd_nanopore(query_fpath,
kromsatel_args.db_fpath,
kromsatel_args.blast_task,
kromsatel_args.use_index,
alignment_fpath)
else:
blast_cmd = _configure_blastn_cmd_illumina(query_fpath,
kromsatel_args.db_fpath,
kromsatel_args.blast_task,
kromsatel_args.use_index,
alignment_fpath)
# end if
# Launch blastn
pipe = sp.Popen(blast_cmd, shell=True, stderr=sp.PIPE)
stdout_stderr = pipe.communicate()
if pipe.returncode != 0:
error_msg = '\nError: an error occured while performing BLAST search:' \
'{}'.format(stdout_stderr[1].decode('utf-8'))
raise FatalError(error_msg)
# end if
fs.rm_file_warn_on_error(query_fpath)
with open(alignment_fpath, 'rt') as alignment_file:
aligmnents = json.load(alignment_file)
# end with
fs.rm_file_warn_on_error(alignment_fpath)
return aligmnents['BlastOutput2']
def _check_primers_fpath(self):
if not os.path.exists(self.argparse_args.primers):
error_msg = '\nError: file `{}` does not exist' \
.format(self.argparse_args.primers)
raise FatalError(error_msg)
def _check_reference_fpath(self):
if not os.path.exists(self.argparse_args.reference):
error_msg = '\nError: file `{}` does not exist' \
.format(self.argparse_args.reference)
raise FatalError(error_msg)
