Stamping Bazel builds with selective delivery
Blog post from Aspect Build
Continuous Deployment (CD) with Bazel presents unique challenges, particularly in the release of artifacts built by Bazel, due to its limited awareness of version control systems like Git. Stamping in Bazel allows embedding of metadata, such as git SHAs, into binaries to facilitate monitoring, although the process is complex and can lead to inefficiencies like cache misses when stable status values change. The document outlines a method for identifying releasable artifacts through Bazel rules, emphasizing the importance of deterministic builds by avoiding stamps in CI builds and ensuring artifacts reflect only relevant version changes. It highlights the use of a key/value store like Redis to manage artifact versions efficiently, ensuring only new or changed artifacts are released. The text notes the challenges of consistent stamping due to varied rule implementations within Bazel, and suggests using Aspect Workflows, an integrated solution developed since the writing of the post, to streamline the CI/CD process with detailed guidance available in the Bazel Delivery Guide.
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