toolkit

SOMISANA Toolkit

• Documentation
  • Install the CLI
  • Update the CLI
  • Examples
    • Algoa Bay operational model
    • Marine Heat Waves
• Local development
  • Configure Python
    • Conda
    • Pyenv
  • Install the Toolkit dependencies
    • Install 3rd party dependencies
    • Conda
    • Pyenv
  • Run the CLI from source
    • Conda
    • Pyenv
    • Shortcut for both Conda and Pyenv
    • Setup script-environment variables

Documentation

The SOMISANA toolkit CLI (Command Line Interface) is packaged as a Docker image, and can be used without configuring a local dev environment.

Install the CLI

Ensure that docker is installed on your system, and install the CLI:

# Download and execute the install script
wget -qO- https://raw.githubusercontent.com/SAEON/somisana/stable/toolkit/install.sh | bash

# Reload your terminal configuration
source ~/.bashrc

# Start Docker if it's not running
sudo service docker start

# Run the CLI
somisana -h

# Update the CLI
somisana update --version latest

Update the CLI

Use the CLI to update itself, referencing a newer version. choose the version of the CLI to use from the listed versions https://github.com/SAEON/somisana/pkgs/container/somisana_toolkit_stable (for example, sha-89a5f54), and then run the update command:

somisana update --version sha-89a5f54

# Or to reset to the original installed version
somisana update --reset

Examples

Algoa Bay operational model

(1) Create a directory workspace

export SOMISANA_DIR="/home/$USER/temp/somisana"
export WORKDIR=$SOMISANA_DIR/local-run

mkdir -p $WORKDIR/{croco/{forcing,forecast,scratch},forcing-inputs}
touch $SOMISANA_DIR/.env
echo COPERNICUS_USERNAME=username >> $SOMISANA_DIR/.env
echo COPERNICUS_PASSWORD=password >> $SOMISANA_DIR/.env
touch $WORKDIR/.env
chmod -R 777 $SOMISANA_DIR
cd $SOMISANA_DIR

(2) Download GFS boundary data

somisana \
  download \
  --workdir $WORKDIR/forcing-inputs \
  --matlab-env $WORKDIR/.env \
  --provider gfs \
  --domain 22,31,-37,-31

(3) Download Mercator boundary data

somisana \
  download \
  --workdir $WORKDIR/forcing-inputs \
  --matlab-env $WORKDIR/.env \
  --provider mercator \
  --domain 22,31,-37,-31

(4) Create forcing files

For this step you do need the source code currently. From the root of the repository (and on the SAEON VPN):

docker run \
  --rm \
  -v $(pwd)/models/algoa-bay-forecast/crocotools:/crocotools/ \
  -v $(pwd)/models/algoa-bay-forecast/lib/grd.nc:/crocotools/croco/forcing/grd.nc \
  -v $WORKDIR:/tmp/somisana/current \
  -e [email protected] \
  ghcr.io/saeon/somisana_matlab:r2022a \
    -batch "run('/crocotools/run.m')"

(5) Compile and run the CROCO model

For this step you do need the source code currently. From the root of the repository:

export NP_ETA=4
export NP_XI=3
export TODAY=$(date +"%Y%m%d")
export YESTERDAY=$(date -d "yesterday" +"%Y%m%d")

# Build the docker image
docker build \
  -t abf_local \
  --build-arg NP_ETA=$NP_ETA \
  --build-arg NP_XI=$NP_XI \
  .

# Run the docker image
docker run \
  --rm \
  -v $WORKDIR:/algoa-bay-forecast/current \
  -v $(pwd)/models/algoa-bay-forecast/lib/grd.nc:/algoa-bay-forecast/current/croco/forcing/grd.nc \
  --cpus $(expr $NP_ETA \* $NP_XI) \
  abf_local \
    ./run_croco.bash \
      /algoa-bay-forecast/current \
      $TODAY \
      $YESTERDAY

Marine Heat Waves

TODO

Local development

Configure Python

You need to be able to specify specific Python versions for the toolkit. Here are instructions for achieving this with pyenv or conda

Conda

Nothing to do here

Pyenv

The pyenv tool adds entries to the beginning of your $PATH variable. So that when you type in the "python" or "pip" commands, you actually run the "pyenv" tool instead of python or pip (since the first entries on $PATH are from pyenv). Pyenv then manages python versions, and you can easily switch between python versions in your terminal. The pyenv tool just redirects the python/pip commands to specific Python versions.

• First Install Python build dependencies. These are required in order for Pyenv to install and build Python (I'm not sure why it's necessary for Pyenv to build Python as opposed to downloading an executable)
• Then Install Pyenv

After installing Pyenv, follow the instructions for configuring your shell environment. Then install the correct Python version (for example 3.10.6 at the time of writing)

PYTHON_VERSION=3.10.6
pyenv install $PYTHON_VERSION
pyenv global $PYTHON_VERSION

Install the Toolkit dependencies

Python dependencies are managed as part of the source code. Some of the libraries reuire 3rd party binaries to be installed separately

Install 3rd party dependencies

These are dependencies that should be installed using the OS package manager and don't get bundled with Python libraries

# for both Pyenv and Conda
sudo apt update
sudo apt install -y \
  asyncpg \
  postgis

# libpq is a binary file required by the PostgreSQL driver (asyncpg)
# postgis is required for the `raster2pgsql` application

Conda

Create a new conda environment called 'somisana' with all the dependencies via the Condafile.yml file

cd toolkit
conda env create -f Condafile.yml

Then activate the environment

conda activate somisana

If Condafile.yml is updated with new required dependences you can update your environment like this

conda env update -f Condafile.yml --prune

Pyenv

Pipenv is a wrapper over the regular pip package manager, but with a slightly better mechanism for locking dependencies of referenced libraries (I believe). Dependencies are managed via the Pipfile and the Pipfile.lock

pip install --user pipenv

# And to update pipenv in the future
pip install --upgrade pipenv

Now install the application Python dependencies as defined in Pipfile.lock

cd toolkit

mkdir .venv # This is optional, and will force pipenv to create a venv directory locally
pipenv install

Run the CLI from source

Conda

With the somisana environment activated

cd toolkit
python __main__.py <options>
# for example
python __main__.py --version # Should print out 'development'
python __main__.py -h # This should list all the available commands

Pyenv

In the case of a Pyenv environment, the pipenv run script command ensures the correct virtual environment is used (see the script called script in the Pipfile).

cd toolkit
pipenv run script <options>
# for example
pipenv run script --version # Should print out 'development'
pipenv run script -h # This should list all the available commands

Shortcut for both Conda and Pyenv

As a shortcut to these cumbersome commands, you can register the toolkit command on your $PATH environment variable that will handle the CLI entry point for you. This checks if you're in a Conda or Pyenv environment so that the same toolkit command can be used in either case. The toolkit command should then work the same as the somisana command used to run the CLI via the docker image.

cd toolkit
source env.sh
toolkit --version # Should print out 'development'
toolkit -h # This should list all the available commands

Setup script-environment variables

The CLI is configured via flags and environment variables (in the case of passwords/etc.). Copy the example config into you directory as .env and adjust accordingly. The .env file is kept out of source control.

cp .env.example .env

NOTE: There is also a env.sh script in the root of the repo that can be sourced so that you don't have to be in the toolkit directory to run the CLI. All path-argument inputs that are relative paths are treated as relative to <repo root>/toolkit