This library contains code that has been used in the Smith lab for too many years, and that we depend on for several of our data analysis tools. Many of those tools use older versions of this source code in subdirectories of other repos.

• A C++ compiler that knows C++17. The GNU g++ compiler works well for this after version GCC9, and the default since GCC11. You can get this from apt, conda and brew, but beware on macos where it's not really installed by default even though it pretends to be.
• The zlib library, which we use for I/O of files in gzip format. You likely have this on your system. You can get this from apt, conda and brew, and it's likely installed already.
• Optional: The HTSLib library, which we use for I/O of SAM and BAM format files. You can get this from apt, conda and brew.

Assuming you downloaded the release X.X the tarball libsmithlab_cpp-X.X.tar.gz, you would do the following:

$ tar -xvf libsmithlab_cpp-X.X.tar.gz
$ cd libsmithlab_cpp-X.X
$ ./configure
$ make
$ make install

If you do not want to contaminate your system's directories with our code, you can modify the 3rd step above to:

$ ./configure --prefix=/some/unimportant/directory

If you want to build this code to use our htslib wrapper, you will need to run like this:

$ ./configure --enable-hts

You must also have HTSlib installed in some standard place on your system. If you have it installed in some other place, then you will need to set variables (CPPFLAGS and LDFLAGS) when running the configure script.

If you clone the repo and attempt to use the source directly, you are likely to run into more problems than if you use a release. I will do everything I can to provide support for the releases, but I may not help if you have problems using the source repo directly.

This README.md file is written just as we are turning smithlab_cpp into a library and not a collection of source files. If you want to use it the way it has been used from 2010-2019, then you can use the Makefile in this repo without running the ./configure script:

$ make OptionParser.o
g++ -Wall -std=c++17 -c -o OptionParser.o OptionParser.cpp

Note: if you run the ./configure script it will overwrite the Makefile indicated above. If that happens, just get a new one. The ./configure script must be obtained using autotools if you cloned this repo; if you downloaded this code as a "release" then the configure script should be present already.

This code needs lots of changes. I'm listing them here for the present and hope to take care of each with separate issues on GitHub. The result should be less total code overall in smithlab_cpp.

• smithlab_os.* Any use of character arrays should be replaced with strings for filenames. Implementation of many functions in the cpp file is sloppy.
• smithlab_utils.*pp: lots to replace here. Many functions seem redundant with functions elsewhere. Not sure of we need the smithlab namespace. Likely the copy_if function should be removed. We should test of the alphabet conversion functions are all needed.
• There might be redundancy between several functions that span GenomicRegion.*pp, chromosome_utils.*pp and smithlab_os.*pp, especially in relation to reading files that contain genomes.