[ARROW-5135] [Rust] Generate flatbuffers code automatically

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Component/s: Rust
• Labels: flatbuffers
• External issue URL: https://github.com/apache/arrow/issues/21618
• Assignee: Unassigned
• Reporter: Krisztian Szucs
• Created: 08/Apr/19 11:03
• Updated: 11/Jan/23 07:38
• Resolved: 26/Apr/21 11:23

Description

This depends on the following upstream flatbuffers issues:

• https://github.com/google/flatbuffers/issues/5052
• https://github.com/google/flatbuffers/issues/5053
• https://github.com/google/flatbuffers/issues/5054

Once they are resolved We should generate flatbuffers code automatically,
as suggested by nevi_me:

// [arrow/rust/arrow/build.rs]

use std::path::Path;
use flatc_rust;

fn main() {
    flatc_rust::run(flatc_rust::Args {
        lang: "rust",
        inputs: &[
            Path::new("../../format/FIle.fbs"),
            Path::new("../../format/Message.fbs"),
            Path::new("../../format/Schema.fbs"),
            Path::new("../../format/Tensor.fbs"),
            Path::new("../../format/SparseTensor.fbs"),
        ],
        out_dir: Path::new("./src/ipc/gen/"),
        // doesn't seem to be honoured
        includes: &[Path::new("../../format/")],
        ..Default::default()
    }).expect("Unable to build flatbuffer files");
}

// [arrow/rust/arrow/Cargo.toml]
[package]
...
build = "build.rs"

...

[build-dependencies]
flatc-rust = "0.1"