substreams-abis 0.5.6

use anyhow::Result;
use std::fs;
use std::path::PathBuf;
use substreams_ethereum::Abigen;
use walkdir::WalkDir;

fn main() -> Result<()> {
    // Base directory for your generated files
    let out_base = PathBuf::from("./src");

    // Recursively walk through `./.src`
    for entry in WalkDir::new("./abi").into_iter().filter_map(|e| e.ok()) {
        let json_path = entry.path();

        // Only process `.json` files
        if json_path.is_file() && json_path.extension().and_then(|ext| ext.to_str()) == Some("json")
        {
            // Convert the file stem to lowercase
            let contract_name = json_path
                .file_stem()
                .and_then(|s| s.to_str())
                .unwrap_or("unknown_contract")
                .to_lowercase();

            // Strip off the leading `./.src/` portion so we can reconstruct a parallel folder tree
            let relative_path = json_path.strip_prefix("./abi")?;
            // Build a PathBuf:  base + the original subfolder + set extension to .rs
            let mut output_path = out_base.join(relative_path);
            output_path.set_file_name(format!("{}.rs", contract_name));

            // Ensure any subdirectories are created
            if let Some(parent) = output_path.parent() {
                fs::create_dir_all(parent)?;
            }

            // Generate & write
            Abigen::new(&contract_name, &json_path.to_string_lossy().to_string())?
                .generate()?
                .write_to_file(output_path)?;
        }
    }

    Ok(())
}