BuildLogs

BuildLogs are the records generated during the execution of a software build, including compilation, dependency resolution, test runs, packaging, and deployment steps. They document the sequence of actions performed by a build pipeline and provide a historical trace of how a particular build was produced.

A typical build log captures timestamped entries for each phase, such as checkout, dependency fetch, compile, test, and publish. Entries may include the command executed, exit status, duration, environment details (OS, tool versions), and the resulting artifacts or URLs to artifacts. Logs may be stored as plain text or in structured formats such as JSON, enabling easier parsing and querying.

Build logs are used for debugging failures, auditing changes, and measuring performance. They enable developers to identify the first failing step, correlate failures with a specific commit or branch, and compare build times across runs. They also support compliance needs by providing a verifiable record of how software was built and tested.

Log storage is often centralized in CI/CD systems or dedicated log stores, with retention policies and access controls. Logs may be transmitted securely, stored encrypted, and linked to build metadata such as commit hash, build number, and environment. Structured logging and log aggregation facilitate searching and trend analysis.

Best practices include using a unique build identifier, standardizing log formats, avoiding or redacting sensitive data, and enabling search and dashboards. Be mindful of log size: large builds require rotation, compression, and selective logging to maintain performance.