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Bulk delete from terraform state

Version your state file

Ensure that you have at least 2 backups of your state file, or at minimum have Versioning enabled on GCS! This has the possibility of deleting things you didn't mean to... ask me how I know

Why

When moving towards using terragrunt based approach, you will be migrating things to separate directories, and need to remove alot of things from the original state.

How

View the entries in the state

terragrunt state list

terraform state list

Create a grep string that targets what you want

In this case, we want to remove things with test in their name

terragrunt state list | grep "test"

terrafrom state list | grep "test"
Example 
google_folder.test
google_folder_iam_member.test["roles/viewer"]
google_project.test[0]
google_project.test[1]
google_project.test[2]
google_project.test[3]
google_storage_bucket.test[0]
google_storage_bucket.test[1]
google_storage_bucket.test[2]
google_storage_bucket.test[3]

Encapsulate everything in ''

We need to do this as passing google_folder_iam_member.test["roles/viewer"] will have issues in BASH

terragrunt state list | grep "test" | sed "s/.*/'&'/"

terraform state list | grep "test" | sed "s/.*/'&'/"

Delete from state

terragrunt state list | grep "test" | sed "s/.*/'&'/" | xargs terragrunt state rm

terraform state list | grep "test" | sed "s/.*/'&'/" | xargs terraform state rm
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