buildkite/zstash

# zstash Go cache library providing cache save/restore and API functionality for the [Buildkite Agent](https://github.com/buildkite/agent). # Cache Key Pattern Matching zstash supports full glob pattern matching for cache keys using the [zzglob](https://pkg.go.dev/drjosh.dev/zzglob) library. # S3 Self-Managed Bucket When using S3 as the storage backend (`local_s3` store type), configure the bucket URL with query parameters to customize behavior. ## URL Format s3://bucket-name[/prefix][?options] ## Options | Parameter | Description | Default | Valid Range | |-----------|-------------|---------|-------------| | `region` | AWS region for the bucket | `us-east-1` | Any valid AWS region | | `endpoint` | Custom S3 endpoint (for S3-compatible storage or local testing) | AWS default | Any valid URL | | `use_path_style` | Use path-style addressing instead of virtual-hosted-style | `false` | `true` or `false` | | `concurrency` | Number of parallel upload/download parts | `5` | 0-100 (0 = default) | | `part_size_mb` | Size of each part in MB for multipart transfers | `5` | 0, or 5-5120 (0 = default) | ## Examples Basic S3 bucket: s3://my-cache-bucket S3 bucket with prefix and region: s3://my-cache-bucket/buildkite/cache?region=us-west-2 S3-compatible storage (e.g., MinIO) with path-style access: s3://my-bucket?endpoint=http://localhost:9000&use_path_style=true High-performance configuration for large files: s3://my-cache-bucket?concurrency=20&part_size_mb=100 All options combined: s3://my-cache-bucket/prefix?region=eu-west-1&concurrency=10&part_size_mb=50 ## Notes # API Documentation See the [API documentation on pkg.go.dev](https://pkg.go.dev/github.com/buildkite/zstash) for details. ## License MIT © Buildkite SPDX-License-Identifier: MIT

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