Fix detection of conda executable.

Previously the (which conda) was returning, on macos, some garbage shell function or alias, leading to this mess:

JULIA_CONDAPKG_BACKEND=Null
JULIA_CONDAPKG_EXE=conda () {
	\local cmd="${1-__missing__}"
	case "$cmd" in
		(activate | deactivate) __conda_activate "$@" ;;
eturn   	(install | update | upgrade | remove | uninstall) __conda_exe "$@" ||
			__conda_activate reactivate ;;
		(*) __conda_exe "$@" ;;
	esac
}
JULIA_PYTHONCALL_EXE=/Users/rwest/miniconda3/envs/rmg_env15/bin/python
PYTHON_JULIAPKG_EXE=/Users/rwest/.juliaup/bin/julia
PYTHON_JULIAPKG_PROJECT=/Users/rwest/miniconda3/envs/rmg_env15/julia_env

which totally messed up the conda environment, making it impossible to activate.

This method now finds the actual conda excutable.

Author: rwest

install_rms.sh

@@ -99,14 +99,16 @@ fi
 
 # Set environment variables for the current environment, for future uses
 # https://juliapy.github.io/PythonCall.jl/stable/pythoncall/#If-you-already-have-Python-and-required-Python-packages-installed
+# Find the actual conda executable (not the shell function)
+CONDA_EXE="${CONDA_EXE:-$(conda info --base)/bin/conda}"
 conda env config vars set JULIA_CONDAPKG_BACKEND=Null
-conda env config vars set JULIA_CONDAPKG_EXE=$(which conda)
+conda env config vars set JULIA_CONDAPKG_EXE="$CONDA_EXE"
 conda env config vars set JULIA_PYTHONCALL_EXE=$CONDA_PREFIX/bin/python
 conda env config vars set PYTHON_JULIAPKG_EXE=$(which julia)
 conda env config vars set PYTHON_JULIAPKG_PROJECT=$CONDA_PREFIX/julia_env
 # Also export for current shell/session (needed for Docker/non-interactive use)
 export JULIA_CONDAPKG_BACKEND=Null
-export JULIA_CONDAPKG_EXE="$(which conda)"
+export JULIA_CONDAPKG_EXE="$CONDA_EXE"
 export JULIA_PYTHONCALL_EXE="$CONDA_PREFIX/bin/python"
 export PYTHON_JULIAPKG_EXE="$(which julia)"
 export PYTHON_JULIAPKG_PROJECT="$CONDA_PREFIX/julia_env"