-
Notifications
You must be signed in to change notification settings - Fork 385
/
resource.go
212 lines (203 loc) · 6.57 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
package common
import (
"context"
"fmt"
"log"
"reflect"
"regexp"
"strings"
"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)
// Resource aims to simplify things like error & deleted entities handling
type Resource struct {
Create func(ctx context.Context, d *schema.ResourceData, c *DatabricksClient) error
Read func(ctx context.Context, d *schema.ResourceData, c *DatabricksClient) error
Update func(ctx context.Context, d *schema.ResourceData, c *DatabricksClient) error
Delete func(ctx context.Context, d *schema.ResourceData, c *DatabricksClient) error
CustomizeDiff func(ctx context.Context, d *schema.ResourceDiff, c any) error
StateUpgraders []schema.StateUpgrader
Schema map[string]*schema.Schema
SchemaVersion int
Timeouts *schema.ResourceTimeout
}
func nicerError(ctx context.Context, err error, action string) error {
name := ResourceName.GetOrUnknown(ctx)
if name == "unknown" {
return err
}
return fmt.Errorf("cannot %s %s: %w", action,
strings.ReplaceAll(name, "_", " "), err)
}
func recoverable(cb func(
ctx context.Context, d *schema.ResourceData, c *DatabricksClient) error) func(
ctx context.Context, d *schema.ResourceData, c *DatabricksClient) error {
return func(ctx context.Context, d *schema.ResourceData, c *DatabricksClient) (err error) {
defer func() {
// this is deliberate decision to convert a panic into error,
// so that any unforeseen bug would we visible to end-user
// as an error and not a provider crash, which is way less
// of pleasant experience.
if panic := recover(); panic != nil {
err = fmt.Errorf("panic: %v", panic)
}
}()
err = cb(ctx, d, c)
return
}
}
// ToResource converts to Terraform resource definition
func (r Resource) ToResource() *schema.Resource {
var update func(ctx context.Context, d *schema.ResourceData,
m any) diag.Diagnostics
if r.Update != nil {
update = func(ctx context.Context, d *schema.ResourceData,
m any) diag.Diagnostics {
c := m.(*DatabricksClient)
if err := recoverable(r.Update)(ctx, d, c); err != nil {
err = nicerError(ctx, err, "update")
return diag.FromErr(err)
}
if err := recoverable(r.Read)(ctx, d, c); err != nil {
err = nicerError(ctx, err, "read")
return diag.FromErr(err)
}
return nil
}
} else {
// set ForceNew to all attributes with CRD
queue := []*schema.Resource{
{Schema: r.Schema},
}
for {
head := queue[0]
queue = queue[1:]
for _, v := range head.Schema {
if v.Computed {
continue
}
if nested, ok := v.Elem.(*schema.Resource); ok {
queue = append(queue, nested)
}
v.ForceNew = true
}
if len(queue) == 0 {
break
}
}
}
generateReadFunc := func(ignoreMissing bool) func(ctx context.Context, d *schema.ResourceData,
m any) diag.Diagnostics {
return func(ctx context.Context, d *schema.ResourceData,
m any) diag.Diagnostics {
err := recoverable(r.Read)(ctx, d, m.(*DatabricksClient))
if ignoreMissing && IsMissing(err) {
log.Printf("[INFO] %s[id=%s] is removed on backend",
ResourceName.GetOrUnknown(ctx), d.Id())
d.SetId("")
return nil
}
if err != nil {
err = nicerError(ctx, err, "read")
return diag.FromErr(err)
}
return nil
}
}
return &schema.Resource{
Schema: r.Schema,
SchemaVersion: r.SchemaVersion,
StateUpgraders: r.StateUpgraders,
CustomizeDiff: r.CustomizeDiff,
CreateContext: func(ctx context.Context, d *schema.ResourceData,
m any) diag.Diagnostics {
c := m.(*DatabricksClient)
err := recoverable(r.Create)(ctx, d, c)
if err != nil {
err = nicerError(ctx, err, "create")
return diag.FromErr(err)
}
if err = recoverable(r.Read)(ctx, d, c); err != nil {
err = nicerError(ctx, err, "read")
return diag.FromErr(err)
}
return nil
},
ReadContext: generateReadFunc(true),
UpdateContext: update,
DeleteContext: func(ctx context.Context, d *schema.ResourceData,
m any) diag.Diagnostics {
err := recoverable(r.Delete)(ctx, d, m.(*DatabricksClient))
if IsMissing(err) {
log.Printf("[INFO] %s[id=%s] is removed on backend",
ResourceName.GetOrUnknown(ctx), d.Id())
d.SetId("")
return nil
}
if err != nil {
err = nicerError(ctx, err, "delete")
return diag.FromErr(err)
}
return nil
},
Importer: &schema.ResourceImporter{
StateContext: func(ctx context.Context, d *schema.ResourceData,
m any) (data []*schema.ResourceData, e error) {
d.MarkNewResource()
diags := generateReadFunc(false)(ctx, d, m)
var err error
if diags.HasError() {
err = diags[0].Validate()
}
return []*schema.ResourceData{d}, err
},
},
Timeouts: r.Timeouts,
}
}
func MustCompileKeyRE(name string) *regexp.Regexp {
regexFromName := strings.ReplaceAll(name, ".", "\\.")
regexFromName = strings.ReplaceAll(regexFromName, ".0", ".\\d+")
return regexp.MustCompile(regexFromName)
}
func makeEmptyBlockSuppressFunc(name string) func(k, old, new string, d *schema.ResourceData) bool {
re := MustCompileKeyRE(name)
return func(k, old, new string, d *schema.ResourceData) bool {
if re.Match([]byte(name)) && old == "1" && new == "0" {
log.Printf("[DEBUG] Suppressing diff for name=%s k=%#v platform=%#v config=%#v", name, k, old, new)
return true
}
return false
}
}
func DataResource(sc any, read func(context.Context, any, *DatabricksClient) error) *schema.Resource {
// TODO: migrate to go1.18 and get schema from second function argument?..
s := StructToSchema(sc, func(m map[string]*schema.Schema) map[string]*schema.Schema { return m })
return &schema.Resource{
Schema: s,
ReadContext: func(ctx context.Context, d *schema.ResourceData, m any) (diags diag.Diagnostics) {
defer func() {
// using recoverable() would cause more complex rewrapping of DataToStructPointer & StructToData
if panic := recover(); panic != nil {
diags = diag.Errorf("panic: %v", panic)
}
}()
ptr := reflect.New(reflect.ValueOf(sc).Type())
DataToReflectValue(d, &schema.Resource{Schema: s}, ptr.Elem())
err := read(ctx, ptr.Interface(), m.(*DatabricksClient))
if err != nil {
err = nicerError(ctx, err, "read data")
diags = diag.FromErr(err)
}
StructToData(ptr.Elem().Interface(), s, d)
// check if the resource schema has the `id` attribute (marked with `json:"id"` in the provided structure).
// and if yes, then use it as resource ID. If not, then use default value for resource ID (`_`)
if _, ok := s["id"]; ok {
d.SetId(d.Get("id").(string))
} else {
d.SetId("_")
}
return
},
}
}