100 lines
2.3 KiB
Go
100 lines
2.3 KiB
Go
package aws
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import (
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"log"
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"github.com/awslabs/aws-sdk-go/aws"
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"github.com/awslabs/aws-sdk-go/service/ec2"
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"github.com/hashicorp/terraform/helper/schema"
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)
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// tagsSchema returns the schema to use for tags.
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//
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func tagsSchema() *schema.Schema {
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return &schema.Schema{
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Type: schema.TypeMap,
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Optional: true,
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}
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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 setTagsSDK(conn *ec2.EC2, 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 := diffTagsSDK(tagsFromMapSDK(o), tagsFromMapSDK(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.DeleteTags(&ec2.DeleteTagsInput{
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Resources: []*string{aws.String(d.Id())},
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Tags: remove,
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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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_, err := conn.CreateTags(&ec2.CreateTagsInput{
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Resources: []*string{aws.String(d.Id())},
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Tags: create,
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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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}
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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 diffTagsSDK(oldTags, newTags []*ec2.Tag) ([]*ec2.Tag, []*ec2.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 []*ec2.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 tagsFromMapSDK(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 tagsFromMapSDK(m map[string]interface{}) []*ec2.Tag {
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result := make([]*ec2.Tag, 0, len(m))
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for k, v := range m {
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result = append(result, &ec2.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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}
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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 tagsToMapSDK(ts []*ec2.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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result[*t.Key] = *t.Value
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}
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return result
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}
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