49 lines
1.1 KiB
Nix
49 lines
1.1 KiB
Nix
import ./make-test-python.nix ({ pkgs, ... }:
|
|
|
|
let
|
|
fenicsScript = pkgs.writeScript "poisson.py" ''
|
|
#!/usr/bin/env python
|
|
from dolfin import *
|
|
|
|
mesh = UnitSquareMesh(4, 4)
|
|
V = FunctionSpace(mesh, "Lagrange", 1)
|
|
|
|
def boundary(x):
|
|
return x[0] < DOLFIN_EPS or x[0] > 1.0 - DOLFIN_EPS
|
|
|
|
u0 = Constant(0.0)
|
|
bc = DirichletBC(V, u0, boundary)
|
|
|
|
u = TrialFunction(V)
|
|
v = TestFunction(V)
|
|
f = Expression("10*exp(-(pow(x[0] - 0.5, 2) + pow(x[1] - 0.5, 2)) / 0.02)", degree=2)
|
|
g = Expression("sin(5*x[0])", degree=2)
|
|
a = inner(grad(u), grad(v))*dx
|
|
L = f*v*dx + g*v*ds
|
|
|
|
u = Function(V)
|
|
solve(a == L, u, bc)
|
|
print(u)
|
|
'';
|
|
in
|
|
{
|
|
name = "fenics";
|
|
meta = {
|
|
maintainers = with pkgs.lib.maintainers; [ knedlsepp ];
|
|
};
|
|
|
|
nodes = {
|
|
fenicsnode = { pkgs, ... }: {
|
|
environment.systemPackages = with pkgs; [
|
|
gcc
|
|
(python3.withPackages (ps: with ps; [ fenics ]))
|
|
];
|
|
};
|
|
};
|
|
testScript =
|
|
{ nodes, ... }:
|
|
''
|
|
start_all()
|
|
fenicsnode.succeed("${fenicsScript}")
|
|
'';
|
|
})
|