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Principles for Effective Build Systems, Contrasting Civ with Make and Bazel
Key points
- A good build system requires explicit inputs and outputs for each build phase.
- Build systems must allow programmatic configuration for different target systems.
- The Civ build system aims to provide an appropriate layer of abstraction.
- Make is criticized for its implicit nature and platform-specific syntax.
Defining a Build System's Core Function
A build system takes source code, binaries, and configuration as input, then outputs files, binaries, and configuration according to a specified folder structure for execution on a target platform. The Civ build system operates on this definition, aiming to manage the transformation from source to executable.
Principle 1: Explicit Inputs and Outputs
A fundamental principle for an effective build system is that all inputs and outputs for every phase of the build process must be explicit. This clarity helps in understanding and managing the build flow. Make is cited as failing this principle due to its reliance on shell scripts and lack of an overarching structure for stitching rules together.
Principle 2: Programmatic Configurability
Another key principle is the ability to programmatically configure inputs and outputs to adapt to different target systems. This ensures flexibility and portability for the build process. A good build system provides the correct level of abstraction between source code and the final program, simplifying complexity without oversimplifying.
Civ's Approach to Abstraction
The Civ build system addresses these principles by delegating decisions about file placement and build methods to a higher level of abstraction. This approach aims to provide a clear and adaptable framework for managing complex software builds, contrasting with systems like Make that offer less structured control.
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Reporting from
This article discusses core principles for effective build systems, using the Civ build system as an example and contrasting it with Make and Bazel. It emphasizes the importance of explicit inputs and outputs and programmatic configuration for adaptability across target systems.