running gfaffix on non-numeric node IDs

[SebastianMeyer1989]

Running gfaffix directly on a hifiasm-produced GFA causes an unhandled "panic" partway through loading the graph:

[2026-08-18T09:18:28Z INFO  gfaffix] running gfaffix on 4 threads
[2026-08-18T09:18:28Z INFO  gfaffix] loading graph from /path/to/graph_r_utg.gfa

thread 'main' (10929) panicked at src/main.rs:1154:80:
called `Result::unwrap()` on an `Err` value: InvalidLine(UintIdError, "S\tutg000001l\tAGCTG ... AGAGT\tLN:i:402575\trd:i:18\n")
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It seems gfaffix had a problem with hifiasm's default node IDs being alphanumeric (e.g. utg000001l).

A workaround I currently use is renaming the GFA nodes into numeric ones, but would it be possible to add the processing of alphanumeric node IDs to gfaffix?

[danydoerr]

Currently, gfaffix works only on numeric nodes, that's because it uses the handlegraph API for loading and this libary doesn't support alphanumeric node IDs That's why adding support for alphanumeric node IDs is probably difficult, because it likely means to abandon handlegraph, on which this tool heavily relies on.

[SebastianMeyer1989]

OK. Thanks for the clarification.