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Martin Atkins 5a6d11e375 addrs: Factor out MoveEndpointInModule module prefix matching
All of our MoveDestination methods have the common problem of deciding
whether the receiver is even potentially in the scope of a particular
MoveEndpointInModule, which requires that the receiver belong to an
instance of the module where the move statement was found.

Previously we had this logic inline in all three cases, but now we'll
factor it out into a shared helper function.

At first it seemed like there ought to be more factoring possible for
the AbsResource vs. AbsResourceInstance implementations, since textually
they look very similar, but in practice they only look similar because
those two types have a lot of method names in common, but the Go compiler
sees them as completely distinct and thus we must write the same logic
out twice. I did try some further refactoring to address that but it
made the resulting code significantly more complicated and, by my
judgement, harder to follow. Consequently I decided that a little
duplication was okay and warranted here because this logic is already
quite fiddly to read through and isn't likely to change significantly once
released (due to backward-compatibility promises).
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README.md

Terraform

Terraform

Terraform is a tool for building, changing, and versioning infrastructure safely and efficiently. Terraform can manage existing and popular service providers as well as custom in-house solutions.

The key features of Terraform are:

  • Infrastructure as Code: Infrastructure is described using a high-level configuration syntax. This allows a blueprint of your datacenter to be versioned and treated as you would any other code. Additionally, infrastructure can be shared and re-used.

  • Execution Plans: Terraform has a "planning" step where it generates an execution plan. The execution plan shows what Terraform will do when you call apply. This lets you avoid any surprises when Terraform manipulates infrastructure.

  • Resource Graph: Terraform builds a graph of all your resources, and parallelizes the creation and modification of any non-dependent resources. Because of this, Terraform builds infrastructure as efficiently as possible, and operators get insight into dependencies in their infrastructure.

  • Change Automation: Complex changesets can be applied to your infrastructure with minimal human interaction. With the previously mentioned execution plan and resource graph, you know exactly what Terraform will change and in what order, avoiding many possible human errors.

For more information, see the introduction section of the Terraform website.

Getting Started & Documentation

Documentation is available on the Terraform website:

If you're new to Terraform and want to get started creating infrastructure, please check out our Getting Started guides on HashiCorp's learning platform. There are also additional guides to continue your learning.

Show off your Terraform knowledge by passing a certification exam. Visit the certification page for information about exams and find study materials on HashiCorp's learning platform.

Developing Terraform

This repository contains only Terraform core, which includes the command line interface and the main graph engine. Providers are implemented as plugins, and Terraform can automatically download providers that are published on the Terraform Registry. HashiCorp develops some providers, and others are developed by other organizations. For more information, see Extending Terraform.

To learn more about compiling Terraform and contributing suggested changes, please refer to the contributing guide.

To learn more about how we handle bug reports, please read the bug triage guide.

License

Mozilla Public License v2.0