b47445490b
This simply topologically sorts the resulting MuGL graph and, in a super lame way, prints out the resources and their properties.
36 lines
1.8 KiB
Go
36 lines
1.8 KiB
Go
// Copyright 2016 Marapongo, Inc. All rights reserved.
|
|
|
|
// Package graph defines MuGL graphs. Each graph is directed and acyclic, and the nodes have been topologically
|
|
// sorted based on dependencies (edges) between them. Each node in the graph has a type and a set of properties.
|
|
//
|
|
// There are two forms of graph: complete and incomplete. A complete graph is one in which all nodes and their property
|
|
// values are known. An incomplete graph is one where two uncertainties may arise: (1) an edge might be "conditional",
|
|
// indicating that its presence or absence is dependent on a piece of information not yet available (like an output
|
|
// property from a resource), and/or (2) a property may either be similarly conditional or computed as an output value.
|
|
//
|
|
// In general, Mu blueprints may be compiled into graphs. These graphs may then be compared to other graphs to produce
|
|
// and/or carry out deployment plans. This package therefore also exposes operations necessary for diffing graphs.
|
|
package graph
|
|
|
|
import (
|
|
"github.com/marapongo/mu/pkg/eval/rt"
|
|
)
|
|
|
|
// Graph is an instance of a MuGL graph. Each is associated with a single blueprint MuPackage as its input, along with
|
|
// a set of optional arguments used to evaluate it, along with the output DAG with node types and properties.
|
|
type Graph interface {
|
|
Roots() []Vertex // the root vertices in the graph.
|
|
}
|
|
|
|
// Vertex is a single vertex within an overall MuGL graph.
|
|
type Vertex interface {
|
|
Obj() *rt.Object // the vertex's object.
|
|
Ins() []Edge // incoming edges from other vertices within the graph to this vertex.
|
|
Outs() []Edge // outgoing edges from this vertex to other vertices within the graph.
|
|
}
|
|
|
|
// Edge is a directed edge from one vertex to another.
|
|
type Edge interface {
|
|
To() Vertex // the vertex this edge connects to.
|
|
From() Vertex // the vertex this edge connects from.
|
|
}
|