terraform/backend
Martin Atkins 0fe43c8977 cli: allow disabling "next steps" message in terraform plan
In #15884 we adjusted the plan output to give an explicit command to run
to apply a plan, whereas before this command was just alluded to in the
prose.

Since releasing that, we've got good feedback that it's confusing to
include such instructions when Terraform is running in a workflow
automation tool, because such tools usually abstract away exactly what
commands are run and require users to take different actions to
proceed through the workflow.

To accommodate such environments while retaining helpful messages for
normal CLI usage, here we introduce a new environment variable
TF_IN_AUTOMATION which, when set to a non-empty value, is a hint to
Terraform that it isn't being run in an interactive command shell and
it should thus tone down the "next steps" messaging.

The documentation for this setting is included as part of the "...in
automation" guide since it's not generally useful in other cases. We also
intentionally disclaim comprehensive support for this since we want to
avoid creating an extreme number of "if running in automation..."
codepaths that would increase the testing matrix and hurt maintainability.

The focus is specifically on the output of the three commands we give in
the automation guide, which at present means the following two situations:

* "terraform init" does not include the final paragraphs that suggest
  running "terraform plan" and tell you in what situations you might need
  to re-run "terraform init".
* "terraform plan" does not include the final paragraphs that either
  warn about not specifying "-out=..." or instruct to run
  "terraform apply" with the generated plan file.
2017-09-14 10:51:41 -07:00
..
atlas backend/atlas: accept ATLAS_ADDRESS env var for address 2017-03-16 23:04:07 -07:00
init deprecate the "azure" backend name 2017-08-17 12:49:23 -04:00
legacy Make backcend/legacy match new Backend iface 2017-02-28 16:35:45 -05:00
local cli: allow disabling "next steps" message in terraform plan 2017-09-14 10:51:41 -07:00
remote-state Obtaining the current metadata before setting it 2017-09-06 12:41:05 -07:00
backend.go command: also print plan for destroy 2017-06-27 11:22:31 -07:00
cli.go cli: allow disabling "next steps" message in terraform plan 2017-09-14 10:51:41 -07:00
nil.go Update Backend interface to latest iteration 2017-02-28 16:07:07 -05:00
nil_test.go backend: introduce the backend set of interfaces 2017-01-26 14:33:49 -08:00
operation_type.go backend: introduce the backend set of interfaces 2017-01-26 14:33:49 -08:00
operationtype_string.go Fix stringer comments (#15069) 2017-06-05 10:17:35 +01:00
testing.go Obtaining the current metadata before setting it 2017-09-06 12:41:05 -07:00