Emit M instead of =/X CIGAR operations by default #261
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
I needed to do some refactoring so that CIGARs are internally always represented as
Cigar
objects and only converted to their string representation at the very last moment when the alignments are serialized to SAM format. This makes it easy to optionally convert them to useM
instead of=
/X
operations since the logic for that needs to be in only one place.I chose
--m-op
as the name for the command-line option for now, but I’m not super happy with it. Bowtie2 and minimap2 have an--eqx
switch and the opposite behavior:M
by default and=
/X
is optional. Perhaps we should change the default as well for better compatibility? Also, that would avoid the spurious variant calling issue as long as htslib is not fixed.