cabal

type Component struct {
	Depends []string `mapstructure:"depends"`
}

type InstallPlan struct {
	// There are two types of install plans: `pre-existing` and `configured`.
	// `pre-existing` corresponds to system-level libraries, and `configured`
	// is for globally-installed and project-local dependencies. To
	// differentiate, the `style` field is used.
	Type    string `mapstructure:"type"`
	Id      string `mapstructure:"id"`
	Name    string `mapstructure:"pkg-name"`
	Version string `mapstructure:"pkg-version"`

	Components map[string]Component `mapstructure:"components"` // Not always present
	Depends    []string             `mapstructure:"depends"`    // Dependencies can be defined here or in Components.*.Depends
	// This field only exists for packages with Type `configured`. It can
	// contain one of two values: `global` for globally-installed dependencies,
	// or `local` for project-local dependencies
	Style string `mapstructure:"style"` // Only exists for packages with type `configured`
}

type Plan struct {
	InstallPlans []InstallPlan `mapstructure:"install-plan"`
}