/
graph_builder_plan.go
204 lines (163 loc) · 5.69 KB
/
graph_builder_plan.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
package terraform
import (
"sync"
"github.com/hashicorp/terraform-plugin-sdk/internal/addrs"
"github.com/hashicorp/terraform-plugin-sdk/internal/configs"
"github.com/hashicorp/terraform-plugin-sdk/internal/dag"
"github.com/hashicorp/terraform-plugin-sdk/internal/states"
"github.com/hashicorp/terraform-plugin-sdk/internal/tfdiags"
)
// PlanGraphBuilder implements GraphBuilder and is responsible for building
// a graph for planning (creating a Terraform Diff).
//
// The primary difference between this graph and others:
//
// * Based on the config since it represents the target state
//
// * Ignores lifecycle options since no lifecycle events occur here. This
// simplifies the graph significantly since complex transforms such as
// create-before-destroy can be completely ignored.
//
type PlanGraphBuilder struct {
// Config is the configuration tree to build a plan from.
Config *configs.Config
// State is the current state
State *states.State
// Components is a factory for the plug-in components (providers and
// provisioners) available for use.
Components contextComponentFactory
// Schemas is the repository of schemas we will draw from to analyse
// the configuration.
Schemas *Schemas
// Targets are resources to target
Targets []addrs.Targetable
// DisableReduce, if true, will not reduce the graph. Great for testing.
DisableReduce bool
// Validate will do structural validation of the graph.
Validate bool
// CustomConcrete can be set to customize the node types created
// for various parts of the plan. This is useful in order to customize
// the plan behavior.
CustomConcrete bool
ConcreteProvider ConcreteProviderNodeFunc
ConcreteResource ConcreteResourceNodeFunc
ConcreteResourceOrphan ConcreteResourceInstanceNodeFunc
once sync.Once
}
// See GraphBuilder
func (b *PlanGraphBuilder) Build(path addrs.ModuleInstance) (*Graph, tfdiags.Diagnostics) {
return (&BasicGraphBuilder{
Steps: b.Steps(),
Validate: b.Validate,
Name: "PlanGraphBuilder",
}).Build(path)
}
// See GraphBuilder
func (b *PlanGraphBuilder) Steps() []GraphTransformer {
b.once.Do(b.init)
concreteResourceInstanceDeposed := func(a *NodeAbstractResourceInstance, key states.DeposedKey) dag.Vertex {
return &NodePlanDeposedResourceInstanceObject{
NodeAbstractResourceInstance: a,
DeposedKey: key,
}
}
steps := []GraphTransformer{
// Creates all the resources represented in the config
&ConfigTransformer{
Concrete: b.ConcreteResource,
Config: b.Config,
},
// Add the local values
&LocalTransformer{Config: b.Config},
// Add the outputs
&OutputTransformer{Config: b.Config},
// Add orphan resources
&OrphanResourceInstanceTransformer{
Concrete: b.ConcreteResourceOrphan,
State: b.State,
Config: b.Config,
},
// We also need nodes for any deposed instance objects present in the
// state, so we can plan to destroy them. (This intentionally
// skips creating nodes for _current_ objects, since ConfigTransformer
// created nodes that will do that during DynamicExpand.)
&StateTransformer{
ConcreteDeposed: concreteResourceInstanceDeposed,
State: b.State,
},
// Create orphan output nodes
&OrphanOutputTransformer{
Config: b.Config,
State: b.State,
},
// Attach the configuration to any resources
&AttachResourceConfigTransformer{Config: b.Config},
// Attach the state
&AttachStateTransformer{State: b.State},
// Add root variables
&RootVariableTransformer{Config: b.Config},
&MissingProvisionerTransformer{Provisioners: b.Components.ResourceProvisioners()},
&ProvisionerTransformer{},
// Add module variables
&ModuleVariableTransformer{
Config: b.Config,
},
TransformProviders(b.Components.ResourceProviders(), b.ConcreteProvider, b.Config),
// Remove modules no longer present in the config
&RemovedModuleTransformer{Config: b.Config, State: b.State},
// Must attach schemas before ReferenceTransformer so that we can
// analyze the configuration to find references.
&AttachSchemaTransformer{Schemas: b.Schemas},
// Connect so that the references are ready for targeting. We'll
// have to connect again later for providers and so on.
&ReferenceTransformer{},
// Add the node to fix the state count boundaries
&CountBoundaryTransformer{
Config: b.Config,
},
// Target
&TargetsTransformer{
Targets: b.Targets,
// Resource nodes from config have not yet been expanded for
// "count", so we must apply targeting without indices. Exact
// targeting will be dealt with later when these resources
// DynamicExpand.
IgnoreIndices: true,
},
// Detect when create_before_destroy must be forced on for a particular
// node due to dependency edges, to avoid graph cycles during apply.
&ForcedCBDTransformer{},
// Close opened plugin connections
&CloseProviderTransformer{},
&CloseProvisionerTransformer{},
// Single root
&RootTransformer{},
}
if !b.DisableReduce {
// Perform the transitive reduction to make our graph a bit
// more sane if possible (it usually is possible).
steps = append(steps, &TransitiveReductionTransformer{})
}
return steps
}
func (b *PlanGraphBuilder) init() {
// Do nothing if the user requests customizing the fields
if b.CustomConcrete {
return
}
b.ConcreteProvider = func(a *NodeAbstractProvider) dag.Vertex {
return &NodeApplyableProvider{
NodeAbstractProvider: a,
}
}
b.ConcreteResource = func(a *NodeAbstractResource) dag.Vertex {
return &NodePlannableResource{
NodeAbstractResource: a,
}
}
b.ConcreteResourceOrphan = func(a *NodeAbstractResourceInstance) dag.Vertex {
return &NodePlannableResourceInstanceOrphan{
NodeAbstractResourceInstance: a,
}
}
}