def get_edges_from_gfa(gfa_fpath, output_dirpath, min_edge_len):
if not gfa_fpath:
return None
input_edges_fpath = join(dirname(gfa_fpath), get_filename(gfa_fpath) + ".fasta")
edges_fpath = join(output_dirpath, basename(input_edges_fpath))
if not is_empty_file(gfa_fpath) and not can_reuse(edges_fpath, files_to_check=[gfa_fpath]):
print("Extracting edge sequences from " + gfa_fpath + "...")
with open(edges_fpath, "w") as out:
with open(gfa_fpath) as f:
for line in f:
if line.startswith('S'):
fs = line.strip().split()
seq_name = fs[1]
seq = None
if is_acgt_seq(fs[2]):
seq = fs[2]
elif len(fs) >= 4 and is_acgt_seq(fs[3]):
seq = fs[3]
if seq and len(seq) >= min_edge_len:
out.write(">%s\n" % get_edge_agv_id(get_edge_num(seq_name)))
out.write(seq)
out.write("\n")
if is_empty_file(edges_fpath) and not is_empty_file(input_edges_fpath):
with open(edges_fpath, "w") as out:
with open(input_edges_fpath) as f:
for line in f:
if line.startswith('>'):
seq_name = line.strip().split()[0][1:]
out.write(">%s\n" % get_edge_agv_id(get_edge_num(seq_name)))
else:
out.write(line)
return edges_fpath
def map_edges_to_ref(input_fpath, output_dirpath, reference_fpath, threads):
mapping_fpath = join(output_dirpath, "mapping.paf")
if reference_fpath:
if not can_reuse(mapping_fpath,
files_to_check=[input_fpath, reference_fpath]):
if not is_empty_file(input_fpath):
print("Aligning graph edges to the reference...")
cmdline = [
"minimap2", "-x", "asm20", "--score-N", "0", "-E", "1,0",
"-N", "200", "-p", "0.5", "-f", "200", "-t",
str(threads), reference_fpath, input_fpath
]
return_code = subprocess.call(cmdline,
stdout=open(mapping_fpath, "w"),
stderr=open(
join(output_dirpath,
"minimap.log"), "w"))
if return_code != 0 or is_empty_file(mapping_fpath):
print(
"Warning! Minimap2 failed aligning edges to the reference"
)
else:
print(
"Warning! File with edge sequences was not found, failed aligning edges to the reference"
)
return mapping_fpath
def run(input_fpath, reference_fpath, out_fpath, output_dirpath, threads,
is_meta):
if not exists(output_dirpath):
os.makedirs(output_dirpath)
if not can_reuse(out_fpath, files_to_check=[input_fpath, reference_fpath]):
quast_exec_path = get_path_to_program("quast.py")
if not quast_exec_path:
print("QUAST is not found!")
return None
cmdline = [quast_exec_path, "--fast", "--agb", input_fpath, "-r", reference_fpath,
"-t", str(threads), "-o", output_dirpath, "--min-contig", "0"] + \
(["--large"] if getsize(input_fpath) > 10 * 1024 * 1024 or is_meta else []) + (["--min-identity", "90"] if is_meta else [])
subprocess.call(cmdline,
stdout=open("/dev/null", "w"),
stderr=open("/dev/null", "w"))
if is_empty_file(out_fpath) or not can_reuse(
out_fpath, files_to_check=[input_fpath, reference_fpath]):
return None
return out_fpath
def format_edges_file(input_fpath, output_dirpath):
if is_empty_file(input_fpath):
return None
edges_fpath = join(output_dirpath, "edges.fasta")
if not can_reuse(edges_fpath, files_to_check=[input_fpath]):
with open(input_fpath) as f:
with open(edges_fpath, "w") as out_f:
for line in f:
if line.startswith('>'):
edge_id = get_edge_agv_id(get_edge_num(line[1:]))
out_f.write(">%s\n" % edge_id)
else:
out_f.write(line)
return edges_fpath
def parse_canu_output(input_dirpath, output_dirpath, min_edge_len):
raw_gfa_fpath = find_file_by_pattern(input_dirpath, ".unitigs.gfa")
if not raw_gfa_fpath:
print("ERROR! GFA file is not found in %s! Please check the options" %
abspath(input_dirpath))
sys.exit(1)
edges_fpath = get_edges_from_gfa(raw_gfa_fpath, output_dirpath,
min_edge_len)
gfa_fpath = join(output_dirpath, basename(raw_gfa_fpath))
if is_empty_file(gfa_fpath) or not can_reuse(
gfa_fpath, files_to_check=[raw_gfa_fpath]):
cmd = 'sed "1s/bogart.edges/1.0/" ' + raw_gfa_fpath
subprocess.call(shlex.split(cmd), stdout=open(gfa_fpath, 'w'))
dict_edges = parse_gfa(gfa_fpath,
min_edge_len,
input_dirpath,
assembler="canu")
contig_edges = parse_canu_assembly_info(input_dirpath, dict_edges)
return dict_edges, contig_edges, edges_fpath
