Version 42 (modified by nicolasmartin, 4 years ago) (diff)

Welcome to the NEMO development area

You should find here everything regarding the development and the support of the NEMO reference.


Become a NEMO developer

First and foremost, if you don't already have a user account then you have to create it.

For NEMO consortium members

If you have a user account or had a developer account before,
see with your local NEMO Officer.


Stefania Ciliberti

Guillaume Samson

Andrew Coward

Dorotea Iovino

Sebastien Masson





For external users

Submit your contribution to the NEMO System Team by
creating a ticket where you will present your proposal.
If your changes are quite modest (one or few routines involved),
you can simply attached in the ticket the output of
any third-party diff tool for easy patching with svn patch

Keep in mind that, despite the help we can offer, a certain amount of
work from you will be need to implement
your developments into the source code

Recommended development installation

After the global reorganisation of the repository, it is now advisable to entirely download the new default development organisation in your local computing architecture:

  • NEMO/trunk: the main development branch
  • NEMO/branches
    • NEMO/branches/YYYY: yearly development branches intended to be merged into trunk by the end of the year
    • NEMO/branches/{NERC,UKMO}: restricted to British operational activities
  • NEMO/releases: all official NEMO releases, only the last one is maintained

The first checkout will be a bit longer than usual but the SVN commands will be much simpler: the modifications will be done locally and not directly to the repository by committing with former complex svn+ssh syntax. See SVN basics? for more.

# One step  method: download directly a copy with write access or
svn co svn+ssh://"ID" [...]
# Two steps method: download a read-only copy and switch to developer when 
# * you have your developer access or
# * a backup of the work is required by committing to the repository
svn co  [...]
svn sw --relocate svn+ssh://"ID"

New build of the working copy

To facilitate the development work by simplifying the management and the sharing of the code in the repository, while ensuring the consistency of the working copies, we have introduced the SVN externals definitions in the building of the working copies.
We have identified the core code and the complementary codes of NEMO, the latter which is developing less rapidly than the NEMO core has been extracted from the development organisation of the repository (branches / releases / trunk) to different locations of the repository.

From now on, a working copy of the NEMO reference is the summation of few checkouts from different sources defined by the svn:externals properties of the working copy.
Here is

# Relative URL                 
# '^' for repository root
^/utils/build/arch"[@REV]"     arch       # FCM configuration file for generic computing architectures
^/utils/build/makenemo"[@REV]" makenemo   # Bash main script for building a NEMO configuration
^/utils/build/mk"[@REV]"       mk         # Bash sub-scripts and FCM input files for compiling
^/utils/tools"[@REV]"          tools      # User tools
^/vendors/AGRIF/dev"[@REV]"    ext/AGRIF  # NEMO dependency for nesting
^/vendors/FCM"[@REV]"          ext/FCM    #  ""      ""     for source code compilation
^/vendors/IOIPSL"[@REV]"       ext/IOIPSL #  ""      ""     for IO management

If you have to modify these properties in your working copy, you can learn the new SVN basics? to work with the repository.

Development activities

Document your developments before coding by following the procedure described at Developers/Developing Code Changes


Developers/Working On Tickets



Information about FCM make?

Information about new features in XIOS?