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Previously this is a task that I've just taken on using my own knowledge of how these parts fit together, but that's not at all a sustainable situation, and so here I've just documented the steps I've followed in for previous Unicode version upgrades, and thus which I'd expect to follow for future Unicode version upgrades too. I hope this is also a somewhat-interesting overview of how Terraform makes use of Unicode, even for folks who are just working on the other relevant features of Terraform and not specifically trying to change Terraform's Unicode support. Since I'm the primary maintainer of two of the dependencies involved in this it seems likely that following this process will still involve me in _some_ capacity, but hopefully only necessarily in the form of reviewing PRs and cutting new releases of those libraries.
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Terraform Core Codebase Documentation
This directory contains some documentation about the Terraform Core codebase, aimed at readers who are interested in making code contributions.
If you're looking for information on using Terraform, please instead refer to the main Terraform CLI documentation.
Terraform Core Architecture Documents
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Terraform Core Architecture Summary: an overview of the main components of Terraform Core and how they interact. This is the best starting point if you are diving in to this codebase for the first time.
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Resource Instance Change Lifecycle: a description of the steps in validating, planning, and applying a change to a resource instance, from the perspective of the provider plugin RPC operations. This may be useful for understanding the various expectations Terraform enforces about provider behavior, either if you intend to make changes to those behaviors or if you are implementing a new Terraform plugin SDK and so wish to conform to them.
(If you are planning to write a new provider using the official SDK then please refer to the Extend documentation instead; it presents similar information from the perspective of the SDK API, rather than the plugin wire protocol.)
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Plugin Protocol: gRPC/protobuf definitions for the plugin wire protocol and information about its versioning strategy.
This documentation is for SDK developers, and is not necessary reading for those implementing a provider using the official SDK.
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How Terraform Uses Unicode: an overview of the various features of Terraform that rely on Unicode and how to change those features to adopt new versions of Unicode.
Contribution Guides
- Maintainer Etiquette: guidelines and expectations for those who serve as Pull Request reviewers, issue triagers, etc.