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"""Functions for initializing the Julia environment and installing deps."""
import warnings
from pathlib import Path
import os
from .version import __version__, __symbolic_regression_jl_version__
def install(julia_project=None, quiet=False): # pragma: no cover
"""
Install PyCall.jl and all required dependencies for SymbolicRegression.jl.
Also updates the local Julia registry.
"""
import julia
julia.install(quiet=quiet)
julia_project, is_shared = _get_julia_project(julia_project)
Main = init_julia()
Main.eval("using Pkg")
io = "devnull" if quiet else "stderr"
io_arg = f"io={io}" if is_julia_version_greater_eq(Main, "1.6") else ""
# Can't pass IO to Julia call as it evaluates to PyObject, so just directly
# use Main.eval:
Main.eval(
f'Pkg.activate("{_escape_filename(julia_project)}", shared = Bool({int(is_shared)}), {io_arg})'
)
if is_shared:
# Install SymbolicRegression.jl:
_add_sr_to_julia_project(Main, io_arg)
Main.eval(f"Pkg.instantiate({io_arg})")
Main.eval(f"Pkg.precompile({io_arg})")
if not quiet:
warnings.warn(
"It is recommended to restart Python after installing PySR's dependencies,"
" so that the Julia environment is properly initialized."
)
def import_error_string(julia_project=None):
s = """
Required dependencies are not installed or built. Run the following code in the Python REPL:
>>> import pysr
>>> pysr.install()
"""
if julia_project is not None:
s += f"""
Tried to activate project {julia_project} but failed."""
return s
def _get_julia_project(julia_project):
if julia_project is None:
is_shared = True
julia_project = f"pysr-{__version__}"
else:
is_shared = False
julia_project = Path(julia_project)
return julia_project, is_shared
def is_julia_version_greater_eq(Main, version="1.6"):
"""Check if Julia version is greater than specified version."""
return Main.eval(f'VERSION >= v"{version}"')
def init_julia():
"""Initialize julia binary, turning off compiled modules if needed."""
from julia.core import JuliaInfo, UnsupportedPythonError
try:
info = JuliaInfo.load(julia="julia")
except FileNotFoundError:
env_path = os.environ["PATH"]
raise FileNotFoundError(
f"Julia is not installed in your PATH. Please install Julia and add it to your PATH.\n\nCurrent PATH: {env_path}",
)
if not info.is_pycall_built():
raise ImportError(import_error_string())
Main = None
try:
from julia import Main as _Main
Main = _Main
except UnsupportedPythonError:
# Static python binary, so we turn off pre-compiled modules.
from julia.core import Julia
jl = Julia(compiled_modules=False)
from julia import Main as _Main
Main = _Main
return Main
def _add_sr_to_julia_project(Main, io_arg):
Main.sr_spec = Main.PackageSpec(
name="SymbolicRegression",
url="https://github.com/MilesCranmer/SymbolicRegression.jl",
rev="v" + __symbolic_regression_jl_version__,
)
Main.eval(f"Pkg.add(sr_spec, {io_arg})")
Main.clustermanagers_spec = Main.PackageSpec(
name="ClusterManagers",
url="https://github.com/JuliaParallel/ClusterManagers.jl",
rev="14e7302f068794099344d5d93f71979aaf4fbeb3",
)
Main.eval(f"Pkg.add(clustermanagers_spec, {io_arg})")
def _escape_filename(filename):
"""Turns a file into a string representation with correctly escaped backslashes"""
str_repr = str(filename)
str_repr = str_repr.replace("\\", "\\\\")
return str_repr
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