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Setting up ISCE on El Capitan

This section describes the setting up of the ISCE software on an El Capitan. The setup is general and allows one to simultaneously install multiple versions on the machine.

Lookup table for mapping variables to locations on disk. The variables are not environment variables. We just use these to simplify instructions.

VARIABLE MY VALUE Comment
HOME /Users/agram Default home directory on El Capitan
ROOT /Users/agram/tools/isce ROOT folder for ISCE installation
MODDIR /Users/agram/privatemodules/isce Folder for storing module files for ISCE
VERSION 201604 Version number of ISCE release

###Step 1: Setup directory structure (Very first installation)

This step only needs to be performed when you are installing ISCE (any version) for the first time on your machine. If you have an old version installed using these very set of instructions, you don't need to repeat Step 1.

  1. Create the directory ROOT . This directory will contain all future ISCE installations.
> mkdir /Users/agram/tools/isce
  1. Create the following subdirectories under ROOT.
ROOT
|
|--src
|--build
|--install
|--config

The commands for creating this directory structure

> cd /Users/agram/tools/isce
> mkdir config src build install
  1. Create the directory MODDIR. This needs to be done in folder HOME/privatemodules. Environment modules looks for user-defined module files in this location.
HOME
|
|--privatemodules
|  |
|  |--isce

The commands for creating this directory structure

> cd
> mkdir privatemodules
> mkdir privatemodules/isce

###Step 2: Download ISCE tarball

Tarballs of different versions of ISCE can be found here

To generalize the instructions, we will refer to the downloaded tarball as "isce-2.0.0_VERSION.tar.bz2".

At the time of writing these instructions, the latest version was "201604".

###Step 3: Create subfolders for the new version

Create a new subfolder for the new version under each subfolder of ROOT.

ROOT
|
|--src
|  |--VERSION
|--build
|  |--VERSION
|--install
|  |--VERSION
|--config 
|  |--VERSION

Commands for setting up this directory structure

> cd /Users/agram/tools/isce
> mkdir config/201604 src/201604 build/201604 install/201604

###Step 4: Untar downloaded tarball in src/VERSION

Untar the downloaded tarball in the src/VERSION folder. This will unpack a directory called isce.

> cd /Users/agram/tools/isce/src/201604
> tar xjvf ~/Downloads/isce-2.0.0_201604.tar.bz2

###Step 5: Create SConfigISCE file in config/VERSION

SConfigISCE is the configuration file used to set paths to the correct directories for building ISCE. We will create a new SConfigISCE for each version to ensure the ability to modify every installed version as needed. The SConfigISCE file needs to be created under ROOT/config/VERSION folder.

> cd /Users/agram/tools/isce/config/201604
> vi SConfigISCE

The template for SConfigISCE is shown below. You only need to change the PRJ_SCONS_BUILD and PRJ_SCONS_INSTALL values.

#Build Directory
PRJ_SCONS_BUILD = /Users/agram/tools/isce/build/201604  

#Install Directory
PRJ_SCONS_INSTALL = /Users/agram/tools/isce/install/201604/isce

LIBPATH =  /opt/local/lib
CPPPATH =  /opt/local/include/python3.6m
FORTRANPATH =  /opt/local/include
FORTRAN = gfortran
CC = gcc

MOTIFLIBPATH = /opt/local/lib              # path to libXm.dylib
X11LIBPATH = /opt/local/lib                # path to libXt.dylib
MOTIFINCPATH = /opt/local/include          # path to location of the Xm directory with various include files (.h)
X11INCPATH = /opt/local/include            # path to location of the X11 directory with various include files

###Step 6: Setup modulefile for specific version of ISCE

We use environment modules to activate/ deactivate a specific version of ISCE. Every version will need its own module file located at MODDIR/VERSION, that sets up appropriate environment variables and paths.

Shown below is the template for isce/201604 located at /Users/agram/privatemodules/isce/201604

#%Module1.0#####################################################################
##
## isce modulefile
##
## privatemodules/isce. Generated from dot.in by configure.
##
proc ModulesHelp { } {
        global version

        puts stderr "\tAdds ISCE directory to your PYTHONPATH environment variable"
        puts stderr "\n\tAlso sets up PATH and LD_LIBRARY_PATH variables\n"
        puts stderr "\n\tVersion $version\n"
}

module-whatis   "adds ISCE stuff to your environment"

# for Tcl script use only
set     version      3.2.10

#Change this for each version
set     isceversion 201604

set		basedir		/Users/agram/tools/isce
set		installdir      $basedir/install/$isceversion/isce
setenv		ISCE_HOME	    $installdir
setenv		SCONS_CONFIG_DIR    $basedir/config/$isceversion

###To make apps available at command line
prepend-path	PATH	$installdir/applications

###To make mdx and other utils available at command line
prepend-path    PATH    $installdir/bin

###To make isce importable in python
prepend-path    PYTHONPATH    $basedir/install/$isceversion

Once you have set this up, you should be able to see this module listed amongst the available modules:

> module list
  1) use.own        3) gee   5) isce/201604
  2) basic          4) isce/201512

If you don't see the isce module file listed, make sure you have loaded the "use.own" module

> module load use.own

This instructs modules to look for module files in your HOME/privatemodules folder.

###Step 7: Load module and install isce

The first thing to do to use any version of ISCE or install a version of ISCE is to load the corresponding module. For this example, I execute

module load isce/201612

Change to the source directory and use scons to install.

> cd /Users/agram/tools/isce/src/201604/isce
> scons install

This should install isce. Run "scons install" twice to make sure that all components are installed successfully.

###Step 8: Ready to use

You are now ready to use isce. Load the modulefile for the version you want to use and when you want to restore the environment, unload the module

> module load isce/201604
> .... Your work ....
> module unload isce

To switch between versions, unload the module for the current version and load the module corresponding to the version you want to use. Modules is a clean way of managing your environment variables.