36bf6afd42
Be able to build arbitrary Julia environments in Nixpkgs, in the same style as python.withPackages.
60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
|
|
# This file based on a ChatGPT reponse for the following prompt:
|
|
# "can you write code in python to build up a DAG representing
|
|
# a dependency tree, and then a function that can return all the
|
|
# dependencies of a given node?"
|
|
|
|
class Node:
|
|
def __init__(self, name):
|
|
self.name = name
|
|
self.dependencies = set()
|
|
|
|
|
|
class DAG:
|
|
def __init__(self):
|
|
self.nodes = {}
|
|
|
|
def add_node(self, node_name, dependencies=None):
|
|
if node_name in self.nodes:
|
|
raise ValueError(f"Node '{node_name}' already exists in the graph.")
|
|
|
|
node = Node(node_name)
|
|
if dependencies:
|
|
node.dependencies.update(dependencies)
|
|
|
|
self.nodes[node_name] = node
|
|
|
|
def add_dependency(self, node_name, dependency_name):
|
|
if node_name not in self.nodes:
|
|
raise ValueError(f"Node '{node_name}' does not exist in the graph.")
|
|
|
|
if dependency_name not in self.nodes:
|
|
raise ValueError(f"Dependency '{dependency_name}' does not exist in the graph.")
|
|
|
|
self.nodes[node_name].dependencies.add(dependency_name)
|
|
|
|
def get_dependencies(self, node_name):
|
|
if node_name not in self.nodes:
|
|
raise ValueError(f"Node '{node_name}' does not exist in the graph.")
|
|
|
|
node = self.nodes[node_name]
|
|
dependencies = set()
|
|
|
|
def traverse_dependencies(current_node):
|
|
for dependency in current_node.dependencies:
|
|
dependencies.add(dependency)
|
|
if dependency in self.nodes:
|
|
traverse_dependencies(self.nodes[dependency])
|
|
|
|
traverse_dependencies(node)
|
|
return dependencies
|
|
|
|
def has_node(self, node_name):
|
|
return node_name in self.nodes
|
|
|
|
def __str__(self):
|
|
graph_str = ""
|
|
for node_name, node in self.nodes.items():
|
|
graph_str += f"{node_name} -> {', '.join(node.dependencies)}\n"
|
|
return graph_str
|