Ester Nix

Evolution STEllaire en Rotation (Ester) is a 2d stellar evolution code. This repo provides a script to build a C++/Fortran/Python development environment to compile and execute ester using the Nix ecosystem.

Installation and usage

The only requirement is Nix itself. Install Nix following: https://nix.dev/install-nix

After Nix has been installed correctly, cd to the root of this directory and execute

nix develop --extra-experimental-features nix-command --extra-experimental-features flakes

This will mount the development environment and install ester. Upon finishing, you will be in a bash shell with the following commands available: star1d, star2d, star_evol

Why Nix

The lock file in this directory guarantees consistent a development environment, greatly facilitating the installation of ester across different distributions

Notes and TODOs

• Only Ester's evolution branch was tested
• A small patch on Ester's CMakeList.txt was needed to find numpy include dirs. Additionally, gfortran > 9.5 required compiling with -fallow-argument-mismatch -fallow-invalid-boz.
• GCC version 12.2.0 was used. Versions 13 and above require more changes in Ester to compile successfully
• Only Openblas was tested. TODO: Test MKL
• TODO: Create an ester flake
• TODO: Test build on MacOS
• TODO: Test build on Windows WSL