when saving nodes and edges of generated code graph to file, errors happened.

[zqxyus]

Hi,
my goal is to use joern to generate code graph and save the edges and nodes to file. For example , given the file " before/177736.c" , we want to save the file's nodes and edges to local files etc., "before/177736.nodes.json", and "before/177736.edges.json" , the two files store node properties, and control/data flow edges for the 177736.c. The following code is the script saved in file get_func_graph.scala.

@main def exec(filename: String) = { importCode.c(filename) run.ossdataflow cpg.graph.E.map(node=>List(node.inNode.id, node.outNode.id, node.label, node.propertiesMap.get("VARIABLE"))).toJson |> filename + ".edges.json" cpg.graph.V.map(node=>node).toJson |> filename + ".nodes.json" delete }
when i run the command ./joern --script get_func_graph.scala --param='filename=/before/177736.c'. the following errors happened.

-- [E008] Not Found Error: /tmp/wrapped-script5571462726263193239.sc:4:13 ------
4 | cpg.graph.E.map(node=>List(node.inNode.id, node.outNode.id, node.label, node.propertiesMap.get("VARIABLE"))).toJson |> filename + ".edges.json"
| ^^^^^^^^^^^
| value E is not a member of flatgraph.Graph
-- [E008] Not Found Error: /tmp/wrapped-script5571462726263193239.sc:5:13 ------
5 | cpg.graph.V.map(node=>node).toJson |> filename + ".nodes.json"
| ^^^^^^^^^^^
| value V is not a member of flatgraph.Graph
2 errors found
Exception in thread "main" replpp.scripting.NonForkingScriptRunner$$anon$1: error during script execution: Error during compilation: Errors encountered during compilation - try --verbose for more output
Please check error output above!
For given input files: /tmp/wrapped-script5571462726263193239.sc
Re-run with --verbose for more details

joern version: v4.0.410
os : ubuntu

How to handle the errors? Thanks!

[mpollmeier]

I'm not sure if you read the documentation, can you please do that first?
https://docs.joern.io/

there's no graph.E and graph.V, and hasn't been in a long time...