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bae9f6d2 JC |
1 | package terraform |
2 | ||
3 | import ( | |
4 | "github.com/hashicorp/terraform/config" | |
5 | "github.com/hashicorp/terraform/config/module" | |
6 | "github.com/hashicorp/terraform/dag" | |
7 | ) | |
8 | ||
9 | // OrphanResourceTransformer is a GraphTransformer that adds resource | |
10 | // orphans to the graph. A resource orphan is a resource that is | |
11 | // represented in the state but not in the configuration. | |
12 | // | |
13 | // This only adds orphans that have no representation at all in the | |
14 | // configuration. | |
15 | type OrphanResourceTransformer struct { | |
16 | Concrete ConcreteResourceNodeFunc | |
17 | ||
18 | // State is the global state. We require the global state to | |
19 | // properly find module orphans at our path. | |
20 | State *State | |
21 | ||
22 | // Module is the root module. We'll look up the proper configuration | |
23 | // using the graph path. | |
24 | Module *module.Tree | |
25 | } | |
26 | ||
27 | func (t *OrphanResourceTransformer) Transform(g *Graph) error { | |
28 | if t.State == nil { | |
29 | // If the entire state is nil, there can't be any orphans | |
30 | return nil | |
31 | } | |
32 | ||
33 | // Go through the modules and for each module transform in order | |
34 | // to add the orphan. | |
35 | for _, ms := range t.State.Modules { | |
36 | if err := t.transform(g, ms); err != nil { | |
37 | return err | |
38 | } | |
39 | } | |
40 | ||
41 | return nil | |
42 | } | |
43 | ||
44 | func (t *OrphanResourceTransformer) transform(g *Graph, ms *ModuleState) error { | |
45 | if ms == nil { | |
46 | return nil | |
47 | } | |
48 | ||
49 | // Get the configuration for this path. The configuration might be | |
50 | // nil if the module was removed from the configuration. This is okay, | |
51 | // this just means that every resource is an orphan. | |
52 | var c *config.Config | |
53 | if m := t.Module.Child(ms.Path[1:]); m != nil { | |
54 | c = m.Config() | |
55 | } | |
56 | ||
57 | // Go through the orphans and add them all to the state | |
58 | for _, key := range ms.Orphans(c) { | |
59 | // Build the abstract resource | |
60 | addr, err := parseResourceAddressInternal(key) | |
61 | if err != nil { | |
62 | return err | |
63 | } | |
64 | addr.Path = ms.Path[1:] | |
65 | ||
66 | // Build the abstract node and the concrete one | |
67 | abstract := &NodeAbstractResource{Addr: addr} | |
68 | var node dag.Vertex = abstract | |
69 | if f := t.Concrete; f != nil { | |
70 | node = f(abstract) | |
71 | } | |
72 | ||
73 | // Add it to the graph | |
74 | g.Add(node) | |
75 | } | |
76 | ||
77 | return nil | |
78 | } |