Lance and Peter;
Peter, thanks for noticing the problem and duplicate tools. Lance, I'm
happy to merge these so there are not two different versions out there.

I prefer your use for genomeCoverageBed over my custom hacks. That's a
nice approach I totally missed.

I avoid the need for the sam indexes by creating the file directly
from the information in the BAM header. I don't think there is any way
around creating it since it's required by the UCSC tools as well, but
everything you need is in the BAM header.

There might be a sneaky way to do this with samtools -H and awk but I'm
not nearly skilled enough to pull that out.

Let me know what you think. I can also update my python wrapper script
to use the genomeCoverageBed approach instead if you think that's


> Hi Peter,
> Thanks for the thoughtful comments.  I believe the requirement for the 
> genome was imposed by the use of an underlying BedTools utility. I also 
> think that in a newer version of that tool, the requirement was removed, 
> since you correctly point out it is not really necessary.
> I will see if I can update the tool to remove that requirement and also 
> see about changing the tool id.  Sorry for the conflict, that was an 
> oversight on my part, though it would be nice if the Tool Shed could 
> check and warn when someone tries to create a new tool. I would suggest 
> flagging the new repo as invalid until the id is updated instead of 
> outright rejection.
> As for the author info, you're right, I should really add that as well.  
> That tool was put together very quickly to meet the need of a customer 
> and I didn't properly clean things up before I uploaded.  I'll let you 
> know once I get an update out.  Of course, any patches etc. are 
> welcome.  ;-)
> Lance
> Peter Cock wrote:
> > Hi Brad&  Lance,
> >
> > I've been using Brad's bam_to_bigwig tool in Galaxy but realized
> > today (with a new dataset using a splice-aware mapper) that it
> > doesn't seem to be ignoring CIGAR N operators where a read is
> > split over an intron. Looking over Brad's Python script which
> > calculates the coverage to write an intermediate wiggle file, this is
> > done with the samtools via pysam. It is not obvious to me if this
> > can be easily modified to ignore introns. Is this possible Brad?
> >
> > I wasn't aware of Lance's rival bam_to_bigwig tool in the ToolShed
> > till now, and that does talk about this issue. It has a boolean option
> > to ignore gaps when computing coverage, recommended for
> > RNA-Seq where reads are mapped across long splice junctions.
> >
> > Lance, from your tool's help it sounds like it needs a genome
> > database build filled in. I don't understand this requirement - Brad's
> > tool works just fine for standalone BAM files (for example reads
> > mapped to an in house assembly). Is that not supported in your
> > tool?
> >
> > Galaxy team - why does the ToolShed allow duplicate repository
> > names (here bam_to_bigwig) AND duplicate tool IDs (again, here
> > bam_to_bigwig)? Won't this cause chaos when sharing workflows?
> > I would suggest checking this when a tool is uploaded and rejecting
> > repository name or tool ID clashes.
> >
> > Regards,
> >
> > Peter
> >
> > P.S.
> >
> > Brad, your tool is missing an explicit<requirements>  tag
> > listing the UCSC binary wigToBigWig, and the Python library
> > pysam.
> >
> > Lance, your tool doesn't seem to include any author information
> > like your name or email address. I'm inferring it is yours from the
> > Galaxy tool shed user id, lparsons.
> -- 
> Lance Parsons - Scientific Programmer
> 134 Carl C. Icahn Laboratory
> Lewis-Sigler Institute for Integrative Genomics
> Princeton University
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