134 lines
3.3 KiB
Go
134 lines
3.3 KiB
Go
package aws
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import (
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"log"
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"regexp"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/awserr"
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"github.com/aws/aws-sdk-go/service/s3"
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"github.com/hashicorp/terraform/helper/schema"
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)
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// setTags is a helper to set the tags for a resource. It expects the
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// tags field to be named "tags"
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func setTagsS3(conn *s3.S3, d *schema.ResourceData) error {
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if d.HasChange("tags") {
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oraw, nraw := d.GetChange("tags")
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o := oraw.(map[string]interface{})
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n := nraw.(map[string]interface{})
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create, remove := diffTagsS3(tagsFromMapS3(o), tagsFromMapS3(n))
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// Set tags
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if len(remove) > 0 {
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log.Printf("[DEBUG] Removing tags: %#v", remove)
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_, err := conn.DeleteBucketTagging(&s3.DeleteBucketTaggingInput{
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Bucket: aws.String(d.Get("bucket").(string)),
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})
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if err != nil {
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return err
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}
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}
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if len(create) > 0 {
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log.Printf("[DEBUG] Creating tags: %#v", create)
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req := &s3.PutBucketTaggingInput{
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Bucket: aws.String(d.Get("bucket").(string)),
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Tagging: &s3.Tagging{
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TagSet: create,
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},
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}
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_, err := conn.PutBucketTagging(req)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// diffTags takes our tags locally and the ones remotely and returns
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// the set of tags that must be created, and the set of tags that must
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// be destroyed.
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func diffTagsS3(oldTags, newTags []*s3.Tag) ([]*s3.Tag, []*s3.Tag) {
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// First, we're creating everything we have
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create := make(map[string]interface{})
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for _, t := range newTags {
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create[*t.Key] = *t.Value
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}
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// Build the list of what to remove
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var remove []*s3.Tag
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for _, t := range oldTags {
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old, ok := create[*t.Key]
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if !ok || old != *t.Value {
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// Delete it!
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remove = append(remove, t)
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}
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}
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return tagsFromMapS3(create), remove
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}
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// tagsFromMap returns the tags for the given map of data.
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func tagsFromMapS3(m map[string]interface{}) []*s3.Tag {
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result := make([]*s3.Tag, 0, len(m))
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for k, v := range m {
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t := &s3.Tag{
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Key: aws.String(k),
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Value: aws.String(v.(string)),
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}
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if !tagIgnoredS3(t) {
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result = append(result, t)
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}
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}
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return result
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}
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// tagsToMap turns the list of tags into a map.
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func tagsToMapS3(ts []*s3.Tag) map[string]string {
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result := make(map[string]string)
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for _, t := range ts {
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if !tagIgnoredS3(t) {
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result[*t.Key] = *t.Value
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}
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}
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return result
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}
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// return a slice of s3 tags associated with the given s3 bucket. Essentially
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// s3.GetBucketTagging, except returns an empty slice instead of an error when
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// there are no tags.
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func getTagSetS3(s3conn *s3.S3, bucket string) ([]*s3.Tag, error) {
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request := &s3.GetBucketTaggingInput{
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Bucket: aws.String(bucket),
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}
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response, err := s3conn.GetBucketTagging(request)
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if ec2err, ok := err.(awserr.Error); ok && ec2err.Code() == "NoSuchTagSet" {
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// There is no tag set associated with the bucket.
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return []*s3.Tag{}, nil
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} else if err != nil {
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return nil, err
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}
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return response.TagSet, nil
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}
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// compare a tag against a list of strings and checks if it should
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// be ignored or not
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func tagIgnoredS3(t *s3.Tag) bool {
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filter := []string{"^aws:"}
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for _, v := range filter {
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log.Printf("[DEBUG] Matching %v with %v\n", v, *t.Key)
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if r, _ := regexp.MatchString(v, *t.Key); r == true {
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log.Printf("[DEBUG] Found AWS specific tag %s (val: %s), ignoring.\n", *t.Key, *t.Value)
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return true
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}
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}
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return false
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}
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