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iam_tags.go
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iam_tags.go
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package main
import (
"context"
"fmt"
"log"
"strings"
"github.com/Cox-Automotive/alks-go"
"github.com/hashicorp/go-cty/cty"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)
type TagMap map[string]interface{}
type IgnoreTags struct {
Keys TagMap
KeyPrefixes TagMap
}
func TagsSchema() *schema.Schema {
return &schema.Schema{
Type: schema.TypeMap,
Optional: true,
Elem: &schema.Schema{Type: schema.TypeString},
}
}
func TagsSchemaComputed() *schema.Schema {
return &schema.Schema{
Type: schema.TypeMap,
Optional: true,
Computed: true,
Elem: &schema.Schema{Type: schema.TypeString},
}
}
func SetTagsDiff(_ context.Context, diff *schema.ResourceDiff, meta interface{}) error {
defaultTags := meta.(*AlksClient).defaultTags
ignoredTags := meta.(*AlksClient).ignoreTags
resourceTags := (diff.Get("tags")).(map[string]interface{})
//default tag values will be overwritten by resource values if key exists in both maps
allTags := combineTagMaps(defaultTags, resourceTags)
localTags := removeIgnoredTags(allTags, *ignoredTags)
// To ensure "tags_all" is correctly computed, we explicitly set the attribute diff
// when the merger of resource-level tags onto provider-level tags results in n > 0 tags,
// otherwise we mark the attribute as "Computed" only when their is a known diff (excluding an empty map)
// or a change for "tags_all".
if len(localTags) > 0 {
if err := diff.SetNew("tags_all", localTags); err != nil {
return fmt.Errorf("error setting new tags_all diff: %w", err)
}
} else if len(diff.Get("tags_all").(map[string]interface{})) > 0 {
if err := diff.SetNewComputed("tags_all"); err != nil {
return fmt.Errorf("error setting tags_all to computed: %w", err)
}
} else if diff.HasChange("tags_all") {
if err := diff.SetNewComputed("tags_all"); err != nil {
return fmt.Errorf("error setting tags_all to computed: %w", err)
}
}
return nil
}
// Removes default tags from a map of role specific + default tags
func removeDefaultTags(allTags TagMap, defaultTags TagMap) TagMap {
if defaultTags == nil {
return allTags
}
result := make(TagMap)
// keep the tag if the values in allTags and default tags are different
for k, v := range allTags {
if defaultVal, ok := defaultTags[k]; !ok || v != defaultVal {
result[k] = v
}
}
return result
}
func removeIgnoredTags(allTags TagMap, ignoredTags IgnoreTags) TagMap {
localMap := TagMap{}
for k, v := range allTags {
localMap[k] = v.(string)
}
for k := range allTags {
if _, ok := ignoredTags.Keys[k]; ok {
delete(localMap, k)
} else {
for kp := range ignoredTags.KeyPrefixes {
if strings.HasPrefix(k, kp) {
delete(localMap, k)
}
}
}
}
return localMap
}
func tagMapToSlice(tagMap TagMap) []alks.Tag {
tags := []alks.Tag{}
for k, v := range tagMap {
tag := alks.Tag{Key: k, Value: v.(string)}
tags = append(tags, tag)
}
return tags
}
func tagSliceToMap(tagSlice []alks.Tag) TagMap {
tagMap := make(TagMap)
for _, t := range tagSlice {
tagMap[t.Key] = t.Value
}
return tagMap
}
func getExternalyManagedTags(roleTags TagMap, ignoredTags IgnoreTags) TagMap {
externalTags := TagMap{}
//Loop Through ignored keys and ignored key prefixes, checking if a tag exists that should be ignored
for k := range ignoredTags.Keys {
if val, ok := roleTags[k]; ok {
externalTags[k] = val.(string)
}
}
for p := range ignoredTags.KeyPrefixes {
for k, v := range roleTags {
if strings.HasPrefix(k, p) {
externalTags[k] = v.(string)
}
}
}
return externalTags
}
// Combine two tag maps. Values in map2 will overwrite values in map1 if they exist in both maps
func combineTagMaps(baseMap TagMap, mergeMap TagMap) TagMap {
LocalMap := TagMap{}
for k, v := range baseMap {
LocalMap[k] = v
}
for k, v := range mergeMap {
LocalMap[k] = v
}
return LocalMap
}
// see: https://github.com/LumaC0/terraform-provider-aws/blob/7f0a73253c273a9ef143189f94890fc66d0dcb9c/internal/tags/key_value_tags.go#L771
func resolveDuplicates(allTags, defaultTags TagMap, d *schema.ResourceData) TagMap {
// remove default tags
t := removeDefaultTags(allTags, defaultTags)
result := make(TagMap)
for k, v := range t {
result[k] = v
}
configTags := make(TagMap)
// raw config only seems to exist during creation
if cf := d.GetRawConfig(); !cf.IsNull() && cf.IsKnown() {
c := cf.GetAttr("tags")
if c.IsNull() {
return t
}
if !c.IsNull() && c.IsKnown() {
normalizeTagsFromRaw(c.AsValueMap(), &configTags)
}
}
if pl := d.GetRawPlan(); !pl.IsNull() && pl.IsKnown() {
c := pl.GetAttr("tags")
if !c.IsNull() && c.IsKnown() {
normalizeTagsFromRaw(c.AsValueMap(), &configTags)
}
log.Printf("[INFO] config tags with plan tags: %#v", configTags)
}
// capturing state tags during refresh
if st := d.GetRawState(); !st.IsNull() && st.IsKnown() {
c := st.GetAttr("tags")
if !c.IsNull() {
normalizeTagsFromRaw(c.AsValueMap(), &configTags)
}
log.Printf("[INFO] config tags with state tags: %#v", configTags)
}
// add configTags to result if key-value pair is in defaultTags
for k, v := range configTags {
if _, ok := result[k]; !ok {
if defaultTags != nil {
if val, ok := defaultTags[k]; ok && val == v {
result[k] = v
}
}
}
}
return result
}
func normalizeTagsFromRaw(m map[string]cty.Value, configTags *TagMap) {
t := *configTags
for k, v := range m {
if !v.IsNull() {
if _, ok := t[k]; !ok {
t[k] = v.AsString()
}
}
}
}