cloud-storage-sync 0.4.0

Embedded rsync-like local files and Google Cloud Storage buckets
Documentation 
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# cloud-storage-sync

[![docs](https://docs.rs/cloud-storage-sync/badge.svg)](https://docs.rs/cloud-storage-sync)

Library to sync files to, from and between Google Cloud Storage buckets

This project depends on [cloud-storage-rs](https://github.com/ThouCheese/cloud-storage-rs.git) crate.
To access bucket you need to specify `SERVICE_ACCOUNT` environment variable which should contain path to the service account json key.

```rust
let force_overwrite = false;
let sync = Sync::new(force_overwrite);

for i in 1..=2 {
    let op_count = sync.sync_local_to_gcs(
        "/some/local/file_or_dir", 
        BUCKET,
        "some/directory",
    ).await?;
    
    if i == 2 {
        assert_eq!(op_count, 0); // passes
    }

    let op_count = sync.sync_gcs_to_local(
        BUCKET,
        "myprefix",
        "../some/directory"
    ).await?;
    
    if i == 2 {
        assert_eq!(op_count, 0); // passes
    }
}
```