forked from hashicorp/terraform
/
transform_orphan.go
288 lines (245 loc) · 6.85 KB
/
transform_orphan.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
package terraform
import (
"fmt"
"log"
"github.com/hashicorp/terraform/config"
"github.com/hashicorp/terraform/config/module"
"github.com/hashicorp/terraform/dag"
)
// GraphNodeStateRepresentative is an interface that can be implemented by
// a node to say that it is representing a resource in the state.
type GraphNodeStateRepresentative interface {
StateId() []string
}
// OrphanTransformer is a GraphTransformer that adds orphans to the
// graph. This transformer adds both resource and module orphans.
type OrphanTransformer struct {
// State is the global state. We require the global state to
// properly find module orphans at our path.
State *State
// Module is the root module. We'll look up the proper configuration
// using the graph path.
Module *module.Tree
// Targets are user-specified resources to target. We need to be aware of
// these so we don't improperly identify orphans when they've just been
// filtered out of the graph via targeting.
Targeting bool
// View, if non-nil will set a view on the module state.
View string
}
func (t *OrphanTransformer) Transform(g *Graph) error {
if t.State == nil {
// If the entire state is nil, there can't be any orphans
return nil
}
if t.Targeting {
log.Printf("Skipping orphan transformer because we have targets.")
// If we are in a run where we are targeting nodes, we won't process
// orphans for this run.
return nil
}
// Build up all our state representatives
resourceRep := make(map[string]struct{})
for _, v := range g.Vertices() {
if sr, ok := v.(GraphNodeStateRepresentative); ok {
for _, k := range sr.StateId() {
resourceRep[k] = struct{}{}
}
}
}
var config *config.Config
if t.Module != nil {
if module := t.Module.Child(g.Path[1:]); module != nil {
config = module.Config()
}
}
var resourceVertexes []dag.Vertex
if state := t.State.ModuleByPath(g.Path); state != nil {
// If we have state, then we can have orphan resources
// If we have a view, get the view
if t.View != "" {
state = state.View(t.View)
}
// Go over each resource orphan and add it to the graph.
resourceOrphans := state.Orphans(config)
resourceVertexes = make([]dag.Vertex, len(resourceOrphans))
for i, k := range resourceOrphans {
// If this orphan is represented by some other node somehow,
// then ignore it.
if _, ok := resourceRep[k]; ok {
continue
}
rs := state.Resources[k]
resourceVertexes[i] = g.Add(&graphNodeOrphanResource{
ResourceName: k,
ResourceType: rs.Type,
dependentOn: rs.Dependencies,
})
}
}
// Go over each module orphan and add it to the graph. We store the
// vertexes and states outside so that we can connect dependencies later.
moduleOrphans := t.State.ModuleOrphans(g.Path, config)
moduleVertexes := make([]dag.Vertex, len(moduleOrphans))
for i, path := range moduleOrphans {
moduleVertexes[i] = g.Add(&graphNodeOrphanModule{
Path: path,
dependentOn: t.State.ModuleByPath(path).Dependencies,
})
}
// Now do the dependencies. We do this _after_ adding all the orphan
// nodes above because there are cases in which the orphans themselves
// depend on other orphans.
// Resource dependencies
for _, v := range resourceVertexes {
g.ConnectDependent(v)
}
// Module dependencies
for _, v := range moduleVertexes {
g.ConnectDependent(v)
}
return nil
}
// graphNodeOrphanModule is the graph vertex representing an orphan resource..
type graphNodeOrphanModule struct {
Path []string
dependentOn []string
}
func (n *graphNodeOrphanModule) DependableName() []string {
return []string{n.dependableName()}
}
func (n *graphNodeOrphanModule) DependentOn() []string {
return n.dependentOn
}
func (n *graphNodeOrphanModule) Name() string {
return fmt.Sprintf("%s (orphan)", n.dependableName())
}
func (n *graphNodeOrphanModule) dependableName() string {
return fmt.Sprintf("module.%s", n.Path[len(n.Path)-1])
}
// GraphNodeExpandable
func (n *graphNodeOrphanModule) Expand(b GraphBuilder) (GraphNodeSubgraph, error) {
g, err := b.Build(n.Path)
if err != nil {
return nil, err
}
return &GraphNodeBasicSubgraph{
NameValue: n.Name(),
Graph: g,
}, nil
}
// graphNodeOrphanResource is the graph vertex representing an orphan resource..
type graphNodeOrphanResource struct {
ResourceName string
ResourceType string
dependentOn []string
}
func (n *graphNodeOrphanResource) DependableName() []string {
return []string{n.dependableName()}
}
func (n *graphNodeOrphanResource) DependentOn() []string {
return n.dependentOn
}
func (n *graphNodeOrphanResource) Name() string {
return fmt.Sprintf("%s (orphan)", n.ResourceName)
}
func (n *graphNodeOrphanResource) ProvidedBy() []string {
return []string{resourceProvider(n.ResourceName)}
}
// GraphNodeEvalable impl.
func (n *graphNodeOrphanResource) EvalTree() EvalNode {
var provider ResourceProvider
var state *InstanceState
seq := &EvalSequence{Nodes: make([]EvalNode, 0, 5)}
// Build instance info
info := &InstanceInfo{Id: n.ResourceName, Type: n.ResourceType}
seq.Nodes = append(seq.Nodes, &EvalInstanceInfo{Info: info})
// Refresh the resource
seq.Nodes = append(seq.Nodes, &EvalOpFilter{
Ops: []walkOperation{walkRefresh},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.ResourceName,
Output: &state,
},
&EvalRefresh{
Info: info,
Provider: &provider,
State: &state,
Output: &state,
},
&EvalWriteState{
Name: n.ResourceName,
ResourceType: n.ResourceType,
Dependencies: n.DependentOn(),
State: &state,
},
},
},
})
// Diff the resource
var diff *InstanceDiff
seq.Nodes = append(seq.Nodes, &EvalOpFilter{
Ops: []walkOperation{walkPlan, walkPlanDestroy},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadState{
Name: n.ResourceName,
Output: &state,
},
&EvalDiffDestroy{
Info: info,
State: &state,
Output: &diff,
},
&EvalWriteDiff{
Name: n.ResourceName,
Diff: &diff,
},
},
},
})
// Apply
seq.Nodes = append(seq.Nodes, &EvalOpFilter{
Ops: []walkOperation{walkApply},
Node: &EvalSequence{
Nodes: []EvalNode{
&EvalReadDiff{
Name: n.ResourceName,
Diff: &diff,
},
&EvalGetProvider{
Name: n.ProvidedBy()[0],
Output: &provider,
},
&EvalReadState{
Name: n.ResourceName,
Output: &state,
},
&EvalApply{
Info: info,
State: &state,
Diff: &diff,
Provider: &provider,
Output: &state,
},
&EvalWriteState{
Name: n.ResourceName,
ResourceType: n.ResourceType,
Dependencies: n.DependentOn(),
State: &state,
},
&EvalUpdateStateHook{},
},
},
})
return seq
}
func (n *graphNodeOrphanResource) dependableName() string {
return n.ResourceName
}