Enable matching of uppercase environment variables

[marpada]

Current Terraform Version

Terraform v0.12.7

Use-cases

The documentation about TF_VAR env variables says

On operating systems where environment variable names are case-sensitive, Terraform matches the variable name exactly as given in configuration, and so the required environment variable name will usually have a mix of upper and lower case letters as in the above example.

Our CD/CI managed system (Azure Pipelines) agent can run on Linux instances, but the agent converts environment variables to uppercase. microsoft/azure-pipelines-agent#1645
To workaround this issue it would be good if Terraform could be configured to match uppercase environment variables.

Proposal

Introduce a command line flag allow matching of uppercase environment variables.

References

microsoft/azure-pipelines-agent#1645

[tobiasbueschel]

This would also be great to have for GitHub Action repository environment variables as GitHub automatically converts to uppercase!

[orefalo]

same issue here

[guidooliveira]

same issue

[mijhael3000]

same issue

[ivancorroto]

same issue

[crw]

Thanks for your interest in this issue! This is just a reminder to please avoid "+1" comments ("same issue"), and to use the upvote mechanism (click or add the 👍 emoji to the original post) to indicate your support for this issue. Thanks again for the feedback!