How to use cargo run from arcs to generate a BVGraph?

[cirosantilli]

I'm looking at how to generate a BVGraph from some text file via the CLI, and cargo run from arcs seemed like the most likely candidate.

Could anyone provide an example of input file that will work for the command? I tried:

tmp.nodes

1,2
2,3
3,4
4,2

and then:

cargo run from arcs --num-nodes 4 tmp.nodes

but that blows up with:

thread 'main' panicked at src/cli/from/arcs.rs:97:23:
index out of bounds: the len is 1 but the index is 1
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

so I must be doing somthing wrong.

I'm sure I'd be able to figure it out from the source code, but I'm doing this just for some quick fun (and maybe some Stack Overflow points! https://stackoverflow.com/questions/31321009/best-more-standard-graph-representation-file-format-graphson-gexf-graphml/79467334#79467334 ) and don't want to put more time into it right now. Hopefully the question will help others as well.

I'd also consider adding such example to the README.

Thanks.

[vigna]

Are you using the Github version? Your example works for me and, yes, we're really behind schedule with releases...

[vigna]

Not really—either he renumbers from 0, or --num-nodes 5.

[cirosantilli]

Ahh thanks stdin input worked!

I hope one day you also manage to expose pagerank calculations on the CLI. That would be beautiful 😿

[vigna]

Next master thesis. The last one had all geometric centralities (closeness, harmonic, betweenness). Soon out. Where soon means "we really are swamped". 😅

[zommiommy]

The next two things we plan to add are apis for DFS, BFS, and parallel BFS visits, and hyperball.

But we think that the compile times might be a bit too much for people who just want to convert graphs, so it might be another repository with another CLI.

[cirosantilli]

The next two things we plan to add are apis for DFS, BFS, and parallel BFS visits, and hyperball.

But we think that the compile times might be a bit too much for people who just want to convert graphs, so it might be another repository with another CLI.

Cool.

I'm a big believer of putting everything in one big repo, e.g. you could reduce compile times with build configurations.

But it's up to you of course, as long as I can do one cargo run on some CLI I'm happy.

[vigna]

On 26 Feb 2025, at 14:06, cirosantilli ***@***.***> wrote: Hi, yes, I'm at main c77b4c9 I built with: cargo build and then ran the above command. I should also clarify that after running cargo run the terminal stays locked at: Compiling webgraph v0.3.0 (/home/ciro/git/webgraph-rs) Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.28s Running `target/debug/webgraph from arcs --num-nodes 4 tmp.nodes` [2025-02-26T14:03:04Z INFO webgraph] Reading arcs CSV for several seconds. Is that expected for such a small graph? Then as soon as I randomly hit Enter then it prints the:

Ahhh. It's from stdin. You just gave the tool the empty line. Try <. Ciao, seba

[vigna]

The docs should be clear now, but I changed default separator with TAB for compatibility with the Java version. You can change the separator with an option tho.

I'm adding an example to the README.