forked from hashicorp/terraform
/
eval_provider.go
137 lines (113 loc) · 3.61 KB
/
eval_provider.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
package terraform
import (
"fmt"
"github.com/hashicorp/terraform/config"
)
// EvalBuildProviderConfig outputs a *ResourceConfig that is properly
// merged with parents and inputs on top of what is configured in the file.
type EvalBuildProviderConfig struct {
Provider string
Config **ResourceConfig
Output **ResourceConfig
}
func (n *EvalBuildProviderConfig) Eval(ctx EvalContext) (interface{}, error) {
cfg := *n.Config
// If we have an Input configuration set, then merge that in
if input := ctx.ProviderInput(n.Provider); input != nil {
// "input" is a map of the subset of config values that were known
// during the input walk, set by EvalInputProvider. Note that
// in particular it does *not* include attributes that had
// computed values at input time; those appear *only* in
// "cfg" here.
rc, err := config.NewRawConfig(input)
if err != nil {
return nil, err
}
merged := rc.Merge(cfg.raw)
cfg = NewResourceConfig(merged)
}
*n.Output = cfg
return nil, nil
}
// EvalConfigProvider is an EvalNode implementation that configures
// a provider that is already initialized and retrieved.
type EvalConfigProvider struct {
Provider string
Config **ResourceConfig
}
func (n *EvalConfigProvider) Eval(ctx EvalContext) (interface{}, error) {
return nil, ctx.ConfigureProvider(n.Provider, *n.Config)
}
// EvalInitProvider is an EvalNode implementation that initializes a provider
// and returns nothing. The provider can be retrieved again with the
// EvalGetProvider node.
type EvalInitProvider struct {
TypeName string
Name string
}
func (n *EvalInitProvider) Eval(ctx EvalContext) (interface{}, error) {
return ctx.InitProvider(n.TypeName, n.Name)
}
// EvalCloseProvider is an EvalNode implementation that closes provider
// connections that aren't needed anymore.
type EvalCloseProvider struct {
Name string
}
func (n *EvalCloseProvider) Eval(ctx EvalContext) (interface{}, error) {
ctx.CloseProvider(n.Name)
return nil, nil
}
// EvalGetProvider is an EvalNode implementation that retrieves an already
// initialized provider instance for the given name.
type EvalGetProvider struct {
Name string
Output *ResourceProvider
}
func (n *EvalGetProvider) Eval(ctx EvalContext) (interface{}, error) {
result := ctx.Provider(n.Name)
if result == nil {
return nil, fmt.Errorf("provider %s not initialized", n.Name)
}
if n.Output != nil {
*n.Output = result
}
return nil, nil
}
// EvalInputProvider is an EvalNode implementation that asks for input
// for the given provider configurations.
type EvalInputProvider struct {
Name string
Provider *ResourceProvider
Config **ResourceConfig
}
func (n *EvalInputProvider) Eval(ctx EvalContext) (interface{}, error) {
rc := *n.Config
orig := rc.DeepCopy()
// Wrap the input into a namespace
input := &PrefixUIInput{
IdPrefix: fmt.Sprintf("provider.%s", n.Name),
QueryPrefix: fmt.Sprintf("provider.%s.", n.Name),
UIInput: ctx.Input(),
}
// Go through each provider and capture the input necessary
// to satisfy it.
config, err := (*n.Provider).Input(input, rc)
if err != nil {
return nil, fmt.Errorf(
"Error configuring %s: %s", n.Name, err)
}
// We only store values that have changed through Input.
// The goal is to cache cache input responses, not to provide a complete
// config for other providers.
confMap := make(map[string]interface{})
if config != nil && len(config.Config) > 0 {
// any values that weren't in the original ResourcConfig will be cached
for k, v := range config.Config {
if _, ok := orig.Config[k]; !ok {
confMap[k] = v
}
}
}
ctx.SetProviderInput(n.Name, confMap)
return nil, nil
}