failed to run mklink

[mmclane]

I just upgraded to terragrunt v0.19.0 this morning. I am running Terraform v0.12.1. I am running on Windows with Powershell. I am trying to setup an example repo based on terragrunt to show to my team for possible adoption.

When I run terragrunt init or terragrunt plan I get the following:

terragrunt init
[terragrunt] [C:\Users\matt.mclane\repos\llamasoft\terraform\environments\prod\network] 2019/06/10 10:11:48 Running command: terraform --version
[terragrunt] 2019/06/10 10:11:48 Reading Terragrunt config file at C:/Users/matt.mclane/repos/llamasoft/terraform/environments/prod/network/terragrunt.hcl
[terragrunt] 2019/06/10 10:11:48 Downloading Terraform configurations from file://C:/Users/matt.mclane/repos/llamasoft/terraform/modules into C:/Users/matt.mclane/repos/llamasoft/terraform/environments/prod/network/.terragrunt-cache/j11A824preQo1pkd4TD25NjWlKs/5dESSr0bTp-_uymXIM66yNDT_Yo
[terragrunt] 2019/06/10 10:11:48 Hit multiple errors:
error downloading 'file://C:/Users/matt.mclane/repos/llamasoft/terraform/modules': failed to run mklink C:/Users/matt.mclane/repos/llamasoft/terraform/environments/prod/network/.terragrunt-cache/tmp-download-Ry4o94 C:\Users\matt.mclane\repos\llamasoft\terraform\modules: exit status 1 "Invalid switch - "Users".\r\n"
[terragrunt] 2019/06/10 10:11:48 Unable to determine underlying exit code, so Terragrunt will exit with error code 1
All the paths seem correct.

[brikis98]

What's in terragrunt.hcl?

[mmclane]

Here is an example:

terraform {
source = "../../../modules//network"
}

inputs = {
env_name = "dev"
region = "us-west-2"
vpc_cidr = "192.168.100.0/24"
}

[mmclane]

For what its worth, it works when I run terragrunt on Linux.

[brikis98]

Could you set the TERRAGRUNT_DEBUG env var to true so we might get a stack trace?

[mmclane]

I get the same result:

~....\terraform....\network git: master ≣ ❯ $env:TERRAGRUNT_DEBUG=true
~....\terraform....\network git: master ≣ ❯ tg plan
[terragrunt] [C:\Users\matt.mclane\repos\llamasoft\terraform\environments\dev\network] 2019/06/11 08:30:44 Running command: terraform --version
[terragrunt] 2019/06/11 08:30:44 Reading Terragrunt config file at C:/Users/matt.mclane/repos/llamasoft/terraform/environments/dev/network/terragrunt.hcl
[terragrunt] 2019/06/11 08:30:44 Downloading Terraform configurations from file://C:/Users/matt.mclane/repos/llamasoft/terraform/modules into C:/Users/matt.mclane/repos/llamasoft/terraform/environments/dev/network/.terragrunt-cache/EvQCp2RmwG2McT-j-KP4avBfktc/5dESSr0bTp-_uymXIM66yNDT_Yo
[terragrunt] 2019/06/11 08:30:44 Hit multiple errors:
error downloading 'file://C:/Users/matt.mclane/repos/llamasoft/terraform/modules': failed to run mklink C:/Users/matt.mclane/repos/llamasoft/terraform/environments/dev/network/.terragrunt-cache/tmp-download-YtsWeH C:\Users\matt.mclane\repos\llamasoft\terraform\modules: exit status 1 "Invalid switch - "Users".\r\n"
[terragrunt] 2019/06/11 08:30:44 Unable to determine underlying exit code, so Terragrunt will exit with error code 1

[brikis98]

Hm, I think we're on an old version of go-getter... Newer versions have fixed symlink issue bugs on Windows: hashicorp/go-getter#159

I'll submit a PR to update us... I may also try to switch to copying instead of symlinks in general as that may fix #736.

[mmclane]

Let me know if I can help test.

[brikis98]

I think this may be a bug in go-getter that hasn't been fixed, actually:

hashicorp/go-getter#51
hashicorp/go-getter#139

[brikis98]

@mmclane Any chance you have a go environment working on your Windows box? If so, could you checkout the go-getter-update branch to see if #739 fixes your issue?

Instead of running terragrunt apply, you can run go run main.go apply with the source code.

[mmclane]

Unfortunately I don't have that environment setup. I tried to pull it down and run the following:
go run main.go plan --terragrunt-source C:\Users\matt.mclane\repos ...

But I get all sorts of errors about missing packages

[ekini]

You can get Go>=1.12 and run

go mod init
go build

That should just work.

[brikis98]

Oh, neat, didn't know Terragrunt already worked with go mod. Officially, we are using dep until go mod is the de-facto tool in the next Go version, so you could also install dep and run dep ensure to download the dependencies. But if go mod works, that's probably the easiest route!

[brikis98]

Give https://github.com/gruntwork-io/terragrunt/releases/tag/v0.19.1 a shot. New binaries should show up in a few minutes.

[mmclane]

Yep, that works.