Go team introduces modular static analysis framework for Go code

Introduction to the Go Analysis Framework

The Go team has introduced a new modular static analysis framework, centered around the `analysis` package. This framework establishes a standardized interface for static analysis tools, allowing them to inspect Go code and report diagnostics, such as potential mistakes or suggested refactorings. This initiative aims to bring consistency and reusability to the development of code quality tools within the Go ecosystem.

Modular Design for Reusability

A key aspect of this framework is its modular design. An analysis, often called a "checker," inspects one package at a time but can retain and utilize information from lower-level packages when analyzing higher-level ones. This approach is analogous to separate compilation in a toolchain, enabling checkers like the `printf` checker to track function delegations across packages and apply checks consistently.

By adhering to a common interface, checkers developed using this framework can be easily integrated and reused across a wide array of driver programs. These include command-line tools like `vet`, text editors, IDEs, build and test systems (e.g., `go build`, Bazel), code review tools, and code-base indexers.

The Analyzer Type

The core component of the API is the `Analyzer` type. An `Analyzer` statically describes an analysis function, including its name, documentation, flags, dependencies on other analyzers, and its operational logic. Users define an analysis by declaring a variable of type `Analyzer`, typically within its own package.

Analysis driver programs, such as `vet`, import a list of these `Analyzer` packages to execute a set of analyses and display the reported diagnostics. This structure simplifies the process of adding new analyses to existing tools by merely adding another `Analyzer` to the driver's list.