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In order to test our GPU porting on Nemo, we created a standalone project called [nemo-build](https://earth.bsc.es/gitlab/amedvede/nemo-build) on GitLab. This repository is meant as a developer environment for future changes. It's README will guide you through the installation and modification process.
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In order to test our GPU porting on Nemo, we created a standalone project called [nemo-build](https://earth.bsc.es/gitlab/amedvede/nemo-build) on GitLab. This repository is meant as a developer environment for future changes. It's README will guide you through the entire installation and modification process in detail.
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The project pulls the source from our own Nemo repository, called [NEMOGCM_V40](https://earth.bsc.es/gitlab/amedvede/nemogcm_v40), which is a copy of the one from ECMWF. After finalizing changes within the nemo-build environment, you can then create a merge request in NEMOGCM_V40. This is the repository that later will be merged with the official one from ECMWF.
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The project pulls the source from our own Nemo repository, called [NEMOGCM_V40](https://earth.bsc.es/gitlab/amedvede/nemogcm_v40), which is a copy of the one from ECMWF. After finalizing changes within the nemo-build environment, you can then create a merge request in NEMOGCM_V40. This is the repository that later will be merged with the official one from ECMWF.
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The sections below will give a short overview of:
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1) How to quickly build and test the Nemo standalone
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2) The different ways of running Nemo (e.g. interactive, GPU on/off, Reproducible, etc.)
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3) The workflow for making changes to the source code
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## 1. Build & Test
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The following list is for a first time setup:
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1) Clone repository recursively:
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```bash
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git clone --recursive https://earth.bsc.es/gitlab/amedvede/nemo-build.git
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```
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2) Clone required data files into your `$HOME/data`
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3) Make a symlink for your platform, e.g.:
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```bash
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ln -s env-lumi.g env.sh
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```
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After the initial setup, you can use the steps below for running and making changes to Nemo:
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1) Export the required environment variables depending on what version you want to build:
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```bash
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export PACKAGE_VERSIONS="nemo:DE340_LOCAL^HEAD^<BRANCH_NAME>"
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export NEMO_WITH_REPRODUCIBLE=1
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export NEMO_WITH_GPU=1
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```
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2) Download the source code with `./dnb.sh :d`
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3) Unpack, Build, and Install the downloaded version with `./dnb.sh`
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After the installation step, you have a folder called `sandbox`, which contains everything needed to run Nemo.
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## 2. Ways of running
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## 3. Workflow for making changes |
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