LHAPDF6 PDF set release procedure
=================================

Releasing a new PDF set is primarily to be done via the CVMFS distributed
filesystem: this is now the canonical data archive, with copies on AFS and
HepForge being secondary (and subject to future removal).

PRELIMINARY: You will need an up-to-date copy of LHAPDF, e.g. version 6.2.1 or
the hg head. It's best to build this on lxplus7, which has a system C++ compiler
that supports the C++11 standard, and has CVMFS mounted at /cvmfs. You will need
to set the environment so it picks up the libLHAPDF library from LD_LIBRARY_PATH
and the Python module from PYTHONPATH.

1. In the expanded-tarball/hg-checkout directory, make a testing directory
e.g. TESTPDFS, and download the PDF set tarballs supplied by the fitting group
into it. Each tarball must have filename format my_set_name.tar.gz -- no .tgz
file extensions, please!

2. Check that each tarball expands to a directory with the same name as the
tarball without the .tar.gz suffix, containing similarly named files: a
mandatory my_set_name.info, and N x my_set_name_0000.dat, my_set_name_0001.dat,
etc.

3. Test each set's .info file for format correctness:
  ./testinfo TESTPDFS/*/*.info
If everything is ok, it will be silent.

4. Test each set for basic operation:
  export LHAPDF_DATA_PATH=$PWD/TESTPDFS:$PWD::
  for i in `find TESTPDFS -mindepth 1 -type d -exec basename {} \;`; do ./testpdfs $i; done

5. Ok, everything seems to be basically working. So we move the new set tarballs
and expanded dirs into the CVMFS downloads area, via the AFS one:
  mv TESTPDFS/* /afs/cern.ch/sw/lcg/external/lhapdfsets/current/

6. Backup and regenerate the pdfsets.index file and the Doxygen version which
will become the table on the website:
  export LHAPDF_DATA_PATH=/afs/cern.ch/sw/lcg/external/lhapdfsets/current/::
  cp pdfsets.index{,.bak}
  ./mkindex > pdfsets.index
  diff pdfsets.index{.bak,}
  -> sanity-check the diff to see that the expected sets have been added, and have distinct IDs
  cd doc
  cp pdfsets.dox{,.bak}
  ./mkpdflist > pdfsets.dox
  diff pdfsets.dox{.bak,}
  -> minimal sanity check the diff

7. Copy the new index file on to AFS/CVMFS:
  cp pdfsets.index /afs/cern.ch/sw/lcg/external/lhapdfsets/current/
  And sync to CVMFS...

8. Send new pdfsets.index and pdfsets.dox files to AB, who'll commit them to hg,
and update the website & HepForge downloads area.