Simplify local build on MacOS

[JCGoran]

pip install . should just work now, provided the user follows the README exactly.
Also updated instructions for specifying wheel version of COFFE when using cibuildwheel.

[fsorrenti]

I still get error:

(base) 12:13:38 [email protected] coffe master bash scripts/install_other.sh class cuba
++ uname -m

• CLASS_INSTALL_DIR=/opt/class_public_arm64
  ++ uname -m
• CUBA_INSTALL_DIR=/opt/cuba_arm64
  +++ dirname scripts/install_other.sh
  ++ cd scripts
  ++ pwd -P
• script_dir=/Users/francescosorrenti/Library/CloudStorage/OneDrive-unige.ch/university_student/coffe/scripts
• for arg in '$@'
• case "${arg}" in
• install_class
• '[' -e /opt/class_public_arm64/lib/libclass.a ']'
• current_dir=/Users/francescosorrenti/Library/CloudStorage/OneDrive-unige.ch/university_student/coffe/scripts/../external/class_public/
• cd /Users/francescosorrenti/Library/CloudStorage/OneDrive-unige.ch/university_student/coffe/scripts/../external/class_public/
• export MACOSX_DEPLOYMENT_TARGET=11.0
• MACOSX_DEPLOYMENT_TARGET=11.0
• git clean -xdf .
• make libclass.a
  make: *** No rule to make target `libclass.a'. Stop.

[JCGoran]

Should be fixed now (see new instructions), git's default of not cloning submodules was the issue.

[fsorrenti]

Better, bur there is another error:

arm64-apple-darwin20.0.0-ar: creating archive libclass.a
a - build/growTable.o
a - build/dei_rkck.o
a - build/sparse.o
a - build/evolver_rkck.o
a - build/evolver_ndf15.o
a - build/arrays.o
a - build/parser.o
a - build/quadrature.o
a - build/hyperspherical.o
a - build/common.o
a - build/trigonometric_integrals.o
a - build/input.o
a - build/background.o
a - build/thermodynamics.o
a - build/perturbations.o
a - build/primordial.o
a - build/nonlinear.o
a - build/transfer.o
a - build/spectra.o
a - build/lensing.o
a - build/hyrectools.o
a - build/helium.o
a - build/hydrogen.o
a - build/history.o

• mkdir -p /opt/class_public_arm64/lib /opt/class_public_arm64/include
  mkdir: /opt/class_public_arm64: Permission denied
  mkdir: /opt/class_public_arm64: Permission denied

For contest, I reinstalled and gitcloned everything again but I got this

[JCGoran]

2 options to resolve this:

1. Use sudo in front of whatever command you are running
2. set the environmental variable CLASS_INSTALL_DIR and CUBA_INSTALL_DIR to some dirs that don't require elevated permissions via export CLASS_INSTALL_DIR=/some/other/dir