#!/bin/tcsh

set hhh = 0

if( $#argv < 1 ) set hhh = 1

if( $hhh == 0 )then
  if( $argv[1] == "-help" ) set hhh = 1
endif

if( $hhh == 1 )then
  echo
  echo "This script downloads the source code for a particular AFNI version."
  echo
  echo "To use this script requires that you have the 'git' software"
  echo "package installed, since the AFNI source code is maintained"
  echo "at https://github.com/afni/AFNI"
  echo
  echo "Usage: @get.afni.version YY.Q.MM"
  echo
  echo "where YY.Q.MM is the version number to get (e.g., 16.0.01)"
  echo
  echo "Note that the final part of the version number always has 2"
  echo "digits -- 16.0.1 is NOT a valid AFNI version number."
  echo
  echo "If you enter an invalid version number, the latest source code"
  echo "version will be fetched, and then an error message of the form"
  echo "  error: pathspec 'AFNI_16.0.1' did not match any file(s) known to git."
  echo "will appear.  At that point, the output directory will contain"
  echo "the latest AFNI source code available on github (which may be"
  echo "slightly in advance of the latest build version)."
  echo "At that point, you can"
  echo " (a) accept this source code; or,"
  echo " (b) delete the output with '/bin/rm -rf AFNI_YY.Q.MM' and try again; or,"
  echo " (c) 'cd AFNI_YY.Q.MM/AFNI' and then type 'git tag' to see"
  echo "     what version numbers are available, then 'cd ../..', remove"
  echo "     the current output as in (b), and try again; or,"
  echo " (d) give up and ask for help on the AFNI message board."
  echo
  echo "The results are put into directory AFNI_YY.Q.MM/AFNI/src"
  echo
  echo "To compile the corresponding binaries, 'cd' to that directory,"
  echo "choose a Makefile from the output of 'ls Makefile.*', perhaps"
  echo "edit it to change the INSTALLDIR macro, then 'make vastness'."
  echo
  echo "To see how a particular source file differs from the current version,"
  echo "a command of the form"
  echo "  git diff master 3dDeconvolve.c"
  echo "can be used (once you have cd-ed to the src directory)."
  echo
  echo "-- RWCox -- Jan 2016"
  exit 0
endif

set vers = $argv[1]
set odir = AFNI_$vers

# create a directory in which to keep the AFNI source code

echo
echo "=== creating directory $odir"
echo
mkdir -p $odir ; cd $odir

# get the current version of AFNI from github

echo
echo "=== cloning AFNI source code from github"
echo
git clone https://github.com/afni/AFNI
cd AFNI

# switch it to the desired version (here 15.3.01)

echo
echo "=== switching AFNI source code to version $vers"
echo
git checkout AFNI_$vers

echo
echo "==="
echo "=== If all went well, AFNI_$vers is now in directory $odir/AFNI/src"
echo "=== At this point, you can cd to that directory, choose a Makefile,"
echo "=== and compile the desired binaries."
echo "==="
echo

exit 0