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bae9f6d2 JC |
1 | package terraform |
2 | ||
3 | // NodeAbstractCountResource should be embedded instead of NodeAbstractResource | |
4 | // if the resource has a `count` value that needs to be expanded. | |
5 | // | |
6 | // The embedder should implement `DynamicExpand` to process the count. | |
7 | type NodeAbstractCountResource struct { | |
8 | *NodeAbstractResource | |
9 | ||
10 | // Validate, if true, will perform the validation for the count. | |
11 | // This should only be turned on for the "validate" operation. | |
12 | Validate bool | |
13 | } | |
14 | ||
15 | // GraphNodeEvalable | |
16 | func (n *NodeAbstractCountResource) EvalTree() EvalNode { | |
17 | // We only check if the count is computed if we're not validating. | |
18 | // If we're validating we allow computed counts since they just turn | |
19 | // into more computed values. | |
20 | var evalCountCheckComputed EvalNode | |
21 | if !n.Validate { | |
22 | evalCountCheckComputed = &EvalCountCheckComputed{Resource: n.Config} | |
23 | } | |
24 | ||
25 | return &EvalSequence{ | |
26 | Nodes: []EvalNode{ | |
27 | // The EvalTree for a plannable resource primarily involves | |
28 | // interpolating the count since it can contain variables | |
29 | // we only just received access to. | |
30 | // | |
31 | // With the interpolated count, we can then DynamicExpand | |
32 | // into the proper number of instances. | |
33 | &EvalInterpolate{Config: n.Config.RawCount}, | |
34 | ||
35 | // Check if the count is computed | |
36 | evalCountCheckComputed, | |
37 | ||
38 | // If validation is enabled, perform the validation | |
39 | &EvalIf{ | |
40 | If: func(ctx EvalContext) (bool, error) { | |
41 | return n.Validate, nil | |
42 | }, | |
43 | ||
44 | Then: &EvalValidateCount{Resource: n.Config}, | |
45 | }, | |
46 | ||
47 | &EvalCountFixZeroOneBoundary{Resource: n.Config}, | |
48 | }, | |
49 | } | |
50 | } |