-
Notifications
You must be signed in to change notification settings - Fork 90
/
yaml.go
246 lines (205 loc) · 6.52 KB
/
yaml.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
package kotsutil
import (
"bytes"
"fmt"
"strings"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/util"
yaml "github.com/replicatedhq/yaml/v3"
goyaml "gopkg.in/yaml.v3"
k8syaml "sigs.k8s.io/yaml"
)
// FixUpYAML is a general purpose function that will ensure that YAML is compatible with KOTS
// This ensures that lines aren't wrapped at 80 chars which breaks template functions
func FixUpYAML(inputContent []byte) ([]byte, error) {
docs := util.ConvertToSingleDocs(inputContent)
fixedUpDocs := make([][]byte, 0)
for _, doc := range docs {
yamlObj := map[string]interface{}{}
err := yaml.Unmarshal(doc, &yamlObj)
if err != nil {
return nil, errors.Wrap(err, "failed to unmarshal yaml")
}
fixedUpDoc, err := util.MarshalIndent(2, yamlObj)
if err != nil {
return nil, errors.Wrap(err, "failed to marshal yaml")
}
fixedUpDocs = append(fixedUpDocs, fixedUpDoc)
}
// MarshalIndent add a line break at the end of each file
return bytes.Join(fixedUpDocs, []byte("---\n")), nil
}
// RemoveNilFieldsFromYAML removes nil fields from a yaml document.
// This is necessary because kustomize will fail to apply a kustomization if these fields contain nil values: https://github.com/kubernetes-sigs/kustomize/issues/5050
func RemoveNilFieldsFromYAML(input []byte) ([]byte, error) {
var data map[string]interface{}
err := k8syaml.Unmarshal([]byte(input), &data)
if err != nil {
return nil, errors.Wrap(err, "failed to unmarshal yaml")
}
removedItems := removeNilFieldsFromMap(data)
if !removedItems {
// no changes were made, return the original input
return input, nil
}
output, err := k8syaml.Marshal(data)
if err != nil {
return nil, errors.Wrap(err, "failed to marshal yaml")
}
return output, nil
}
func removeNilFieldsFromMap(input map[string]interface{}) bool {
removedItems := false
for key, value := range input {
if value == nil {
delete(input, key)
removedItems = true
continue
}
if valueMap, ok := value.(map[string]interface{}); ok {
removedItems = removeNilFieldsFromMap(valueMap) || removedItems
continue
}
if valueSlice, ok := value.([]interface{}); ok {
for idx := range valueSlice {
if itemMap, ok := valueSlice[idx].(map[string]interface{}); ok {
removedItems = removeNilFieldsFromMap(itemMap) || removedItems
}
}
continue
}
}
return removedItems
}
func MergeYAMLNodes(targetNodes []*goyaml.Node, overrideNodes []*goyaml.Node) []*goyaml.Node {
// Since inputs are arrays and not maps, we need to:
// 1. Copy all keys in targetNodes, overriding the ones that match from overrideNodes
// 2. Add all keys from overrideNodes that don't exist in targetNodes
if len(overrideNodes) == 0 {
return targetNodes
}
if len(targetNodes) == 0 {
return overrideNodes
}
// Special case where top level node is either a mapping node or an array
if len(targetNodes) == 1 && len(overrideNodes) == 1 {
if targetNodes[0].Kind == goyaml.MappingNode && overrideNodes[0].Kind == goyaml.MappingNode {
return []*goyaml.Node{
{
Kind: goyaml.MappingNode,
Content: MergeYAMLNodes(targetNodes[0].Content, overrideNodes[0].Content),
},
}
}
if targetNodes[0].Value == overrideNodes[0].Value {
return overrideNodes
}
return append(targetNodes, overrideNodes...)
}
// 1. Copy all keys in targetNodes, overriding the ones that match from overrideNodes
newNodes := make([]*goyaml.Node, 0)
for i := 0; i < len(targetNodes)-1; i += 2 {
var additionalNode *goyaml.Node
for j := 0; j < len(overrideNodes)-1; j += 2 {
nodeNameI := targetNodes[i]
nodeValueI := targetNodes[i+1]
nodeNameJ := overrideNodes[j]
nodeValueJ := overrideNodes[j+1]
if nodeNameI.Value != nodeNameJ.Value {
continue
}
additionalNode = &goyaml.Node{
Kind: nodeValueJ.Kind,
Tag: nodeValueJ.Tag,
Line: nodeValueJ.Line,
Style: nodeValueJ.Style,
Anchor: nodeValueJ.Anchor,
Value: nodeValueJ.Value,
Alias: nodeValueJ.Alias,
HeadComment: nodeValueJ.HeadComment,
LineComment: nodeValueJ.LineComment,
FootComment: nodeValueJ.FootComment,
Column: nodeValueJ.Column,
}
if nodeValueI.Kind == goyaml.MappingNode && nodeValueJ.Kind == goyaml.MappingNode {
additionalNode.Content = MergeYAMLNodes(nodeValueI.Content, nodeValueJ.Content)
} else {
additionalNode.Content = nodeValueJ.Content
}
break
}
if additionalNode != nil {
newNodes = append(newNodes, targetNodes[i], additionalNode)
} else {
newNodes = append(newNodes, targetNodes[i], targetNodes[i+1])
}
}
// 2. Add all keys from overrideNodes that don't exist in targetNodes
for j := 0; j < len(overrideNodes)-1; j += 2 {
isFound := false
for i := 0; i < len(newNodes)-1; i += 2 {
nodeNameI := newNodes[i]
nodeValueI := newNodes[i+1]
additionalNodeName := overrideNodes[j]
additionalNodeValue := overrideNodes[j+1]
if nodeNameI.Value != additionalNodeName.Value {
continue
}
if nodeValueI.Kind == goyaml.MappingNode && additionalNodeValue.Kind == goyaml.MappingNode {
nodeValueI.Content = MergeYAMLNodes(nodeValueI.Content, additionalNodeValue.Content)
}
isFound = true
break
}
if !isFound {
newNodes = append(newNodes, overrideNodes[j], overrideNodes[j+1])
}
}
return newNodes
}
func ContentToDocNode(doc *goyaml.Node, nodes []*goyaml.Node) *goyaml.Node {
if doc == nil {
return &goyaml.Node{
Kind: goyaml.DocumentNode,
Content: nodes,
}
}
return &goyaml.Node{
Kind: doc.Kind,
Tag: doc.Tag,
Line: doc.Line,
Style: doc.Style,
Anchor: doc.Anchor,
Value: doc.Value,
Alias: doc.Alias,
HeadComment: doc.HeadComment,
LineComment: doc.LineComment,
FootComment: doc.FootComment,
Column: doc.Column,
Content: nodes,
}
}
func NodeToYAML(node *goyaml.Node) ([]byte, error) {
var renderedContents bytes.Buffer
yamlEncoder := goyaml.NewEncoder(&renderedContents)
yamlEncoder.SetIndent(2) // this may change indentations of the original values.yaml, but this matches out tests
err := yamlEncoder.Encode(node)
if err != nil {
return nil, errors.Wrap(err, "marshal")
}
return renderedContents.Bytes(), nil
}
// Handy functions for printing YAML nodes
func PrintNodes(nodes []*goyaml.Node, i int) {
for _, n := range nodes {
PrintNode(n, i)
}
}
func PrintNode(n *goyaml.Node, i int) {
if n == nil {
return
}
indent := strings.Repeat(" ", i*2)
fmt.Printf("%stag:%v, style:%v, kind:%v, value:%v\n", indent, n.Tag, n.Style, n.Kind, n.Value)
PrintNodes(n.Content, i+1)
}