gistfile1.txt

Using terraform v0.6.12

Steps to reproduce:
1) create a module in your local filesystem, use that module from within the root module
eg: module "foo" { source = "./foomod" }
2) run terraform get -update
3) confirm the cached module is a symlink: ls -l .terraform/modules/ should have a file that links to ./foomod
4) change the root module's invocation to point at a github repo instead (doesn't matter which one but it must exist)
eg module "foo" { source = "github.com/terraform-community-modules/tf_aws_sg" }
5) run terraform get -update

Observe:
* the terraform output includes "Get: git::https://github.com/terraform-community-modules/tf_aws_sg.git (update)"
* the exit code of the terraform get -update command is 0, indicating success
* run ls -l .terraform/modules/ and observe that the symlink to the local filesystem for module foomod still exists
* running 'terraform plan' continues to use the local filesystem version of foomod