Function call graph for a codebase

​
Neo4j Graph

Codegen can export codebase graphs to Neo4j for visualization and analysis.

​
Installation

In order to use Neo4j you will need to install it and run it locally using Docker.

​
Neo4j

First, install Neo4j using the official installation guide.

​
Docker

To run Neo4j locally using Docker, follow the instructions here.

​
Launch Neo4j Locally

docker run \
    -p 7474:7474 -p 7687:7687 \
    -v $PWD/data:/data -v $PWD/plugins:/plugins \
    --name neo4j-apoc \
    -e NEO4J_apoc_export_file_enabled=true \
    -e NEO4J_apoc_import_file_enabled=true \
    -e NEO4J_apoc_import_file_use__neo4j__config=true \
    -e NEO4J_PLUGINS=\[\"apoc\"\] \
    neo4j:latest

​
Usage

from codegen import Codebase
from codegen.extensions.graph.main import visualize_codebase

# parse codebase
codebase = Codebase("path/to/codebase")

# export to Neo4j
visualize_codebase(codebase, "bolt://localhost:7687", "neo4j", "password")

​
Visualization

Once exported, you can open the Neo4j browser at http://localhost:7474, sign in with the username neo4j and the password password, and use the following Cypher queries to visualize the codebase:

​
Class Hierarchy

Match (s: Class )-[r: INHERITS_FROM*]-> (e:Class) RETURN s, e LIMIT 10

Class hierarchy for a codebase

​
Methods Defined by Each Class

Match (s: Class )-[r: DEFINES]-> (e:Method) RETURN s, e LIMIT 10

Methods defined by each class

​
Function Calls

Match (s: Func )-[r: CALLS]-> (e:Func) RETURN s, e LIMIT 10

Function call graph for a codebase

​
Call Graph

Match path = (:(Method|Func)) -[:CALLS*5..10]-> (:(Method|Func))
Return path 
LIMIT 20

Call graph for a codebase