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Bazel rule to securely download private dependencies from cloud storage.

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Cloud archive

This set of WORKSPACE rules for Bazel lets you securely download private workspace dependencies from Google Cloud Storage, S3, Minio, or Backblaze B2. This can be useful when pulling data, code, and binary dependencies from these storage backends into your Bazel build.

In addition, these rules are support the much faster Zstandard compression for *.tar.zst and *.tzst files, assuming your tar supports zstd and zstd is installed. If not you see errors, try sudo apt install zstd before you file an issue, and make sure your tar is fresh enough to support this.

Usage

load("//:cloud_archive.bzl", "gs_archive")

gs_archive(
    name = "archive_gcloud",
    build_file = "//:BUILD.archive",
    bucket = "my_bucket",
    file_path = "cloud_archive_test.tar.gz",
    sha256 = "bf4dd5304180561a745e816ee6a8db974a3fcf5b9d706a493776d77202c48bc9",
    strip_prefix = "cloud_archive_test",
)

Pretty similar to HTTP archive rule in Bazel. s3_archive, minio_archive and b2_archive are also available.

Requirements

This currently only works on Linux, although adapting it to macOS and Windows shouldn't be difficult.

Google Cloud storage

The gsutil command must be installed, and authenticated using gcloud auth login.

S3

AWS CLI is required to be in the path for S3 support, and must be set up such that you can download files from the buckets referenced in the rules with aws s3 cp. --profile flag is also supported, for people who use multiple profiles.

Minio

Likewise for Minio, mc command should be in the path, and Minio should be set up such that mc cp is able to download the referenced files.

Backblaze

The b2 command line utility must be installed and configured to access the account as per the instructions.

Usage

Please refer to WORKSPACE file in this repository for an example of how to use this.

How to test

To test, you will need to point the workspace targets to your own cloud storage, as well as initialize cloud storage on your machine to the point where the typical cp command works.

Future work

Quite obviously this can also be adapted to other cloud storage providers, basically anything that can download an archive from the command line should work.

License

This software is licensed under Apache 2.0.

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Bazel rule to securely download private dependencies from cloud storage.

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