Ship your own Go linter this weekend

// A minimal analyzer the course builds in module 2
var Analyzer = &analysis.Analyzer{
    Name: "nilcheck",
    Doc:  "reports guaranteed nil derefs",
    Requires: []*analysis.Analyzer{inspect.Analyzer},
    Run: run,
}

func run(pass *analysis.Pass) (any, error) {
    insp := pass.ResultOf[inspect.Analyzer]
    insp.Preorder(nodes, func(n ast.Node) {
        pass.Reportf(n.Pos(), "nil deref")
    })
    return nil, nil
}