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Nick Fagerlund b43daeaa8d Cloud backend: accept version constraints from workspaces
The cloud backend (and remote before it) previously expected a TFC workspace's
`terraform-version` attribute to be either the magic string `"latest"` or an
explicit semver value. But a workspace might have a version constraint instead
(like `~> 1.1.0`), in which case the version check would blow up.

This commit checks whether `terraform-version` is a valid version constraint
before erroring out, and if so, returns success if the local version meets the
constraint.

Because it's not practical to deeply introspect the slice of version space
defined by a constraint, this check is slightly less robust than the version
comparisons below it:

- It can give a false OK on open-ended constraints like `>= 1.1.0`. Say you're
  running 1.3.0, it changed the state format, and the TFE instance admin has
  not yet added any 1.3.x Terraform versions; your workspace will now break.

- It will give a false not-OK when using different minor versions within a range
  that we know to be compatible, e.g. remote constraint of `~> 0.15.0` and local
  version of 1.1.0.

- This would be totally useless with the pre-0.14 versions of Terraform, where
  patch releases could change state format... but we're not going back in time
  to add this feature to them anyway.

Still, in the most common likely case (`~> x.y.z`), it'll complain at you (with
an error you can choose to override) if you're not using the same minor version,
and that seems proportionate, useful, and expected.
2021-10-28 19:29:13 -05:00
.circleci udpate CI go version 2021-10-08 15:53:08 -04:00
.github Add clarification to message about community PR review 2021-09-07 21:04:13 -05:00
docs Add docs on how to release a new major protocol version. (#29552) 2021-09-09 11:33:07 -07:00
internal Cloud backend: accept version constraints from workspaces 2021-10-28 19:29:13 -05:00
scripts build: Run staticcheck with "go run" 2021-10-12 11:42:17 -07:00
tools build: Add exhaustive switch statement lint 2021-09-24 15:12:44 -04:00
version Cleanup after v1.1.0-alpha20211020 release 2021-10-20 17:42:49 +00:00
website Merge pull request #29691 from ramj9/patch-1 2021-10-26 09:49:46 -04:00
.gitignore Remove several ignore rules 2021-09-01 14:37:26 -05:00
.go-version update to go1.17.2 2021-10-08 15:54:02 -04:00
.tfdev Remove revision from version command 2021-01-12 16:35:30 -05:00
BUGPROCESS.md Update BUGPROCESS.md 2020-12-10 12:15:39 -05:00
CHANGELOG.md Update CHANGELOG.md 2021-10-23 07:28:42 -07:00
CODEOWNERS etcdv3 backend is unmaintained 2021-07-20 13:59:08 -04:00
Dockerfile switch to hashicorp docker mirror 2020-10-29 22:37:11 -04:00
LICENSE Adding license 2014-07-28 13:54:06 -04:00
Makefile build: Add exhaustive switch statement lint 2021-09-24 15:12:44 -04:00
README.md fix broken logo in readme (#29705) 2021-10-05 16:31:02 -04:00
checkpoint.go Move command/ to internal/command/ 2021-05-17 14:09:07 -07:00
codecov.yml update to match new default branch name (#27909) 2021-02-24 13:36:47 -05:00
commands.go command: Remove the experimental "terraform add" command 2021-10-20 06:42:47 -07:00
go.mod update to tfc-integration branch of go-tfe 2021-10-28 19:29:13 -05:00
go.sum update to tfc-integration branch of go-tfe 2021-10-28 19:29:13 -05:00
help.go Update links to CLI docs in code comments, messages, and readme 2021-01-22 12:22:21 -08:00
main.go Small comment typo 2021-06-24 16:41:58 -04:00
main_test.go don't error when processing autocomplete commands 2021-03-31 13:28:08 -04:00
plugins.go Move command/ to internal/command/ 2021-05-17 14:09:07 -07:00
provider_source.go Move command/ to internal/command/ 2021-05-17 14:09:07 -07:00
signal_unix.go Upgrade to Go 1.17 2021-08-17 15:20:05 -07:00
signal_windows.go Upgrade to Go 1.17 2021-08-17 15:20:05 -07:00
version.go Remove revision from version command 2021-01-12 16:35:30 -05:00
working_dir.go workdir: Start of a new package for working directory state management 2021-09-10 14:56:49 -07:00

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