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Allow passing read name to mappy (#1260)

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* Allow passing read name to mappy

This adds the (optional) ability to pass the read
name to the mappy `map` method.  Without the
read name, the call to `map` can sometimes give
different output than the command line version
of `minimap2` because of the way minimap uses
the hash of the read name to break ties in ordering
hits.  This can affect which / if certain
supplementary alignments are generated, and even
which / if non-primary alignments are generated.

* Pass name directly to mm_map_aux

Get rid of additional function, and always
accept the name parameter in the mm_map_aux
function (can be nullptr if not available).

---------

Co-authored-by: Rob Patro <rob@newton>
This commit is contained in:
Rob Patro
2024-11-15 08:51:10 -05:00
committed by GitHub
parent fcb5d5e6eb
commit 358a39850f
3 changed files with 16 additions and 7 deletions
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15
python/mappy.pyx
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@@ -163,7 +163,7 @@ cdef class Aligner:
def __bool__(self):
return (self._idx != NULL)
def map(self, seq, seq2=None, buf=None, cs=False, MD=False, max_frag_len=None, extra_flags=None):
def map(self, seq, seq2=None, name=None, buf=None, cs=False, MD=False, max_frag_len=None, extra_flags=None):
cdef cmappy.mm_reg1_t *regs
cdef cmappy.mm_hitpy_t h
cdef ThreadBuffer b
@@ -185,11 +185,20 @@ cdef class Aligner:
km = cmappy.mm_tbuf_get_km(b._b)
_seq = seq if isinstance(seq, bytes) else seq.encode()
if name is not None:
_name = name if isinstance(name, bytes) else name.encode()
if seq2 is None:
regs = cmappy.mm_map_aux(self._idx, _seq, NULL, &n_regs, b._b, &map_opt)
if name is None:
regs = cmappy.mm_map_aux(self._idx, NULL, _seq, NULL, &n_regs, b._b, &map_opt)
else:
regs = cmappy.mm_map_aux(self._idx, _name, _seq, NULL, &n_regs, b._b, &map_opt)
else:
_seq2 = seq2 if isinstance(seq2, bytes) else seq2.encode()
regs = cmappy.mm_map_aux(self._idx, _seq, _seq2, &n_regs, b._b, &map_opt)
if name is None:
regs = cmappy.mm_map_aux(self._idx, NULL, _seq, _seq2, &n_regs, b._b, &map_opt)
else:
regs = cmappy.mm_map_aux(self._idx, _name, _seq, _seq2, &n_regs, b._b, &map_opt)
try:
i = 0