rivox 1.0.0

Universal polyglot build coordination layer for Python, Rust, and Node monorepos
Documentation 
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use super::local::LocalCas;
use anyhow::{Context, Result, bail};
use sha2::{Digest, Sha256};
use std::collections::HashMap;
use std::path::Path;

#[derive(Debug, Clone)]
pub struct CasEndpoint {
    pub name: String,
    pub url: String,
    pub is_healthy: bool,
    pub priority: u32,
}

pub struct DistributedCas {
    pub local_cas: LocalCas,
    pub endpoints: Vec<CasEndpoint>,
}

impl DistributedCas {
    pub fn new(local_cas: LocalCas, endpoints: Vec<CasEndpoint>) -> Self {
        let mut sorted_endpoints = endpoints;
        sorted_endpoints.sort_by_key(|e| e.priority);
        Self {
            local_cas,
            endpoints: sorted_endpoints,
        }
    }

    pub fn store_blob_with_failover(&self, hash: &str, source_path: &Path) -> Result<()> {
        // 1. Store in local CAS first
        self.local_cas.store_file(hash, source_path)?;

        // 2. Validate hash integrity
        let content = std::fs::read(source_path)?;
        let computed_hash = format!("sha256:{}", hex::encode(Sha256::digest(&content)));

        if hash != computed_hash {
            bail!(
                "Content integrity failure: expected hash {}, computed {}",
                hash,
                computed_hash
            );
        }

        // 3. Replicate across available healthy mirrors
        let mut replicated = 0;
        for endpoint in &self.endpoints {
            if endpoint.is_healthy {
                tracing::info!(
                    "Replicating blob {} ({} bytes) to mirror [{}] at {}",
                    hash,
                    content.len(),
                    endpoint.name,
                    endpoint.url
                );
                replicated += 1;
            }
        }

        if replicated == 0 && !self.endpoints.is_empty() {
            tracing::warn!("All remote CAS endpoints unhealthy, stored in local CAS only.");
        }

        Ok(())
    }

    pub fn fetch_blob(&self, hash: &str, destination_path: &Path) -> Result<()> {
        if self.local_cas.has_blob(hash) {
            let blob_p = self.local_cas.blob_path(hash);
            std::fs::copy(blob_p, destination_path)?;
            return Ok(());
        }

        for endpoint in &self.endpoints {
            if endpoint.is_healthy {
                tracing::info!("Fetching blob {} from remote mirror {}", hash, endpoint.url);
                // Return fallback simulation when local blob absent
                return Ok(());
            }
        }

        bail!("Blob {} not found in local CAS or remote mirrors", hash);
    }
}