forked from hashicorp/terraform
-
Notifications
You must be signed in to change notification settings - Fork 0
/
resource.go
234 lines (202 loc) · 5.89 KB
/
resource.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
package terraform
import (
"fmt"
"reflect"
"strconv"
"strings"
"github.com/hashicorp/terraform/config"
)
// ResourceProvisionerConfig is used to pair a provisioner
// with its provided configuration. This allows us to use singleton
// instances of each ResourceProvisioner and to keep the relevant
// configuration instead of instantiating a new Provisioner for each
// resource.
type ResourceProvisionerConfig struct {
Type string
Provisioner ResourceProvisioner
Config *ResourceConfig
RawConfig *config.RawConfig
ConnInfo *config.RawConfig
}
// Resource encapsulates a resource, its configuration, its provider,
// its current state, and potentially a desired diff from the state it
// wants to reach.
type Resource struct {
// These are all used by the new EvalNode stuff.
Name string
Type string
CountIndex int
// These aren't really used anymore anywhere, but we keep them around
// since we haven't done a proper cleanup yet.
Id string
Info *InstanceInfo
Config *ResourceConfig
Dependencies []string
Diff *InstanceDiff
Provider ResourceProvider
State *InstanceState
Provisioners []*ResourceProvisionerConfig
Flags ResourceFlag
TaintedIndex int
}
// ResourceKind specifies what kind of instance we're working with, whether
// its a primary instance, a tainted instance, or an orphan.
type ResourceFlag byte
const (
FlagPrimary ResourceFlag = 1 << iota
FlagTainted
FlagOrphan
FlagHasTainted
FlagReplacePrimary
FlagDeposed
)
// InstanceInfo is used to hold information about the instance and/or
// resource being modified.
type InstanceInfo struct {
// Id is a unique name to represent this instance. This is not related
// to InstanceState.ID in any way.
Id string
// ModulePath is the complete path of the module containing this
// instance.
ModulePath []string
// Type is the resource type of this instance
Type string
}
// HumanId is a unique Id that is human-friendly and useful for UI elements.
func (i *InstanceInfo) HumanId() string {
if len(i.ModulePath) <= 1 {
return i.Id
}
return fmt.Sprintf(
"module.%s.%s",
strings.Join(i.ModulePath[1:], "."),
i.Id)
}
// ResourceConfig holds the configuration given for a resource. This is
// done instead of a raw `map[string]interface{}` type so that rich
// methods can be added to it to make dealing with it easier.
type ResourceConfig struct {
ComputedKeys []string
Raw map[string]interface{}
Config map[string]interface{}
raw *config.RawConfig
}
// NewResourceConfig creates a new ResourceConfig from a config.RawConfig.
func NewResourceConfig(c *config.RawConfig) *ResourceConfig {
result := &ResourceConfig{raw: c}
result.interpolateForce()
return result
}
// CheckSet checks that the given list of configuration keys is
// properly set. If not, errors are returned for each unset key.
//
// This is useful to be called in the Validate method of a ResourceProvider.
func (c *ResourceConfig) CheckSet(keys []string) []error {
var errs []error
for _, k := range keys {
if !c.IsSet(k) {
errs = append(errs, fmt.Errorf("%s must be set", k))
}
}
return errs
}
// Get looks up a configuration value by key and returns the value.
//
// The second return value is true if the get was successful. Get will
// not succeed if the value is being computed.
func (c *ResourceConfig) Get(k string) (interface{}, bool) {
// First try to get it from c.Config since that has interpolated values
result, ok := c.get(k, c.Config)
if ok {
return result, ok
}
// Otherwise, just get it from the raw config
return c.get(k, c.Raw)
}
// GetRaw looks up a configuration value by key and returns the value,
// from the raw, uninterpolated config.
//
// The second return value is true if the get was successful. Get will
// not succeed if the value is being computed.
func (c *ResourceConfig) GetRaw(k string) (interface{}, bool) {
return c.get(k, c.Raw)
}
// IsComputed returns whether the given key is computed or not.
func (c *ResourceConfig) IsComputed(k string) bool {
_, ok := c.get(k, c.Config)
_, okRaw := c.get(k, c.Raw)
return !ok && okRaw
}
// IsSet checks if the key in the configuration is set. A key is set if
// it has a value or the value is being computed (is unknown currently).
//
// This function should be used rather than checking the keys of the
// raw configuration itself, since a key may be omitted from the raw
// configuration if it is being computed.
func (c *ResourceConfig) IsSet(k string) bool {
if c == nil {
return false
}
for _, ck := range c.ComputedKeys {
if ck == k {
return true
}
}
if _, ok := c.Get(k); ok {
return true
}
return false
}
func (c *ResourceConfig) get(
k string, raw map[string]interface{}) (interface{}, bool) {
parts := strings.Split(k, ".")
if len(parts) == 1 && parts[0] == "" {
parts = nil
}
var current interface{} = raw
for _, part := range parts {
if current == nil {
return nil, false
}
cv := reflect.ValueOf(current)
switch cv.Kind() {
case reflect.Map:
v := cv.MapIndex(reflect.ValueOf(part))
if !v.IsValid() {
return nil, false
}
current = v.Interface()
case reflect.Slice:
if part == "#" {
current = cv.Len()
} else {
i, err := strconv.ParseInt(part, 0, 0)
if err != nil {
return nil, false
}
if i >= int64(cv.Len()) {
return nil, false
}
current = cv.Index(int(i)).Interface()
}
default:
panic(fmt.Sprintf("Unknown kind: %s", cv.Kind()))
}
}
return current, true
}
// interpolateForce is a temporary thing. We want to get rid of interpolate
// above and likewise this, but it can only be done after the f-ast-graph
// refactor is complete.
func (c *ResourceConfig) interpolateForce() {
if c.raw == nil {
var err error
c.raw, err = config.NewRawConfig(make(map[string]interface{}))
if err != nil {
panic(err)
}
}
c.ComputedKeys = c.raw.UnknownKeys()
c.Raw = c.raw.Raw
c.Config = c.raw.Config()
}