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Terraform supports multiple output formats for several sub-commands. The default format is user-readable text, but many sub-commands support a `-json` flag to output a machine-readable format for the result. The output command also supports a `-raw` flag for a simpler, scripting- focused machine readable format. This commit adds a "views" abstraction, intended to help ensure consistency between the various output formats. This extracts the render specific code from the command package, and moves it into a views package. Each command is expected to create an interface for its view, and one or more implementations of that interface. By doing so, we separate the concerns of generating the sub-command result from rendering the result in the specified output format. This should make it easier to ensure that all output formats will be updated together when changes occur in the result-generating phase. There are some other consequences of this restructuring: - Views now directly access the terminal streams, rather than the now-redundant cli.Ui instance; - With the reorganization of commands, parsing CLI arguments is now the responsibility of a separate "arguments" package. For now, views are added only for the output sub-command, as an example. Because this command uses code which is shared with the apply and refresh commands, those are also partially updated. |
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README.md
Terraform
- Website: https://www.terraform.io
- Forums: HashiCorp Discuss
- Documentation: https://www.terraform.io/docs/
- Tutorials: HashiCorp's Learn Platform
- Certification Exam: HashiCorp Certified: Terraform Associate
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:
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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.
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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.
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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.
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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.