mirror of https://github.com/kubernetes/kops.git
126 lines
3.1 KiB
Go
126 lines
3.1 KiB
Go
/*
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Copyright 2020 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package terraform
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import (
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"bytes"
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"fmt"
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"reflect"
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"sort"
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"strings"
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"k8s.io/kops/upup/pkg/fi/cloudup/terraformWriter"
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)
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type mapStringLiteral struct {
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members map[string]*terraformWriter.Literal
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}
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func (m *mapStringLiteral) IsSingleValue() bool {
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return false
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}
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func (m *mapStringLiteral) ToObject() element {
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o := &object{field: make(map[string]element, len(m.members))}
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for k, v := range m.members {
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o.field[k] = v
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}
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return o
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}
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// write writes a map's key-value pairs to a body spread across multiple lines.
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// Example:
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//
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// key = {
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// "key1" = "value1"
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// "key2" = "value2"
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// }
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func (m *mapStringLiteral) Write(buffer *bytes.Buffer, indent int, key string) {
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if len(m.members) == 0 {
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return
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}
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writeIndent(buffer, indent)
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buffer.WriteString(key)
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buffer.WriteString(" = {\n")
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keys := make([]string, 0, len(m.members))
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maxKeyLen := 0
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for k := range m.members {
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kLen := len(quote(k))
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if kLen > maxKeyLen {
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maxKeyLen = kLen
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}
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for _, k := range keys {
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writeIndent(buffer, indent+2)
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quoted := quote(k)
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buffer.WriteString(quoted)
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writeIndent(buffer, maxKeyLen-len(quoted))
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buffer.WriteString(" = ")
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buffer.WriteString(m.members[k].String)
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buffer.WriteRune('\n')
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}
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writeIndent(buffer, indent)
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buffer.WriteString("}\n")
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}
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func mapToElement(item interface{}) *mapStringLiteral {
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v := reflect.ValueOf(item)
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if v.Kind() != reflect.Map {
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panic(fmt.Sprintf("not a map type %s", v.Kind()))
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}
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if v.Type().Key().Kind() != reflect.String {
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panic(fmt.Sprintf("unhandled map key type %s", v.Type().Key().Kind()))
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}
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elemType := v.Type().Elem()
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if elemType.Kind() == reflect.Pointer && elemType.Elem() == literalType {
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o := &mapStringLiteral{members: make(map[string]*terraformWriter.Literal, v.Len())}
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for _, key := range v.MapKeys() {
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o.members[key.String()] = v.MapIndex(key).Interface().(*terraformWriter.Literal)
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}
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return o
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}
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if elemType.Kind() != reflect.String {
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panic(fmt.Sprintf("unhandled map value type %s", elemType.Kind()))
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}
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o := &mapStringLiteral{members: make(map[string]*terraformWriter.Literal, v.Len())}
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for _, key := range v.MapKeys() {
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o.members[key.String()] = terraformWriter.LiteralFromStringValue(v.MapIndex(key).String())
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}
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return o
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}
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func writeIndent(buf *bytes.Buffer, indent int) {
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for i := 0; i < indent; i++ {
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buf.WriteString(" ")
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}
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}
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func quote(s string) string {
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var b strings.Builder
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b.WriteRune('"')
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for _, r := range s {
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if r == '\\' || r == '"' {
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b.WriteRune('\\')
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}
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b.WriteRune(r)
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}
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b.WriteRune('"')
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return b.String()
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}
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