Split the storage package into a new separate repository #80
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The reason for splitting is to avoid license conflict to expand support for other storage types. See #79 for details This commit removes the storage package from this repository and replaces all references for the storage package to a new repository. https://github.com/minamijoyo/tfmigrate-storage
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I originally wrote the local and s3 storage implementation for tfmigrate as the MIT license. Next, someone sent me a patch for gcs storage implementation minamijoyo/tfmigrate#23, copied from the upstream terraform backend implementation. I was concerned it would violate the MPL2 license because the tfmigrate' license is MIT, and terraform's is MPL2. So I split the storage implementations minamijoyo/tfmigrate#80 into a separate https://github.com/minamijoyo/tfmigrate-storage repository and relicensed it as MPL2 so that someone could easily copy snippets from the upstream. However, we could not contact that patch's author and the initial patch was not merged finally. Time passed, KengoTODA sent me another patch #3 for gcs support which contained minimal functionality and was not copied from upstream. This patch has finally been accepted and merged. That is, I've changed the license of the storage implementation with the intention that it will contain a derivative work of terraform that can be easily copied from terraform's backend implementation to extend various storage types, but this has yet to happen. It's clearly far from the terraform's implementation at the time of writing. Recently, HashiCorp announced that it would change the license of its products, including Terraform, from MPL2 to BSL1.1. https://www.hashicorp.com/blog/hashicorp-adopts-business-source-license If, as I originally intended, we allow contributors to copy code from upstream terraform, the tfmigrate-storage repository must also be changed to BSL. This means that the tfmigrate source can continue to be distributed as MIT, but the tfmigrate's binary will be bounded by BSL. Even though HashiCorp's BSL is a reasonably permissive license with no restrictions other than HashiCorp's competitors, it is no longer open-source by OSI definition. I want to continue to keep tfmigrate as an open-source project. Technically, it is possible to keep the tfmigrate-storage repository as MPL2. Still, I no longer have a solid reason to do so; it is just inconvenient to have a separate repository. Fortunately, KengoTODA and I are still the only contributors to the tfmigrate-storage repository, and I got permission from KengoTODA to re-license his patch as MIT in minamijoyo/tfmigrate#146. So, I'm going to change the license of the tfmigrate-storage repository to MIT and will merge it into the tfmigrate repository.
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The reason for splitting is to avoid license conflict to expand support for other storage types.
See #79 for details.
This commit removes the storage package from this repository and replaces all references for the storage package to a new repository.
https://github.com/minamijoyo/tfmigrate-storage