Use terraform provider mirror at buildtime? about terraform-mixin

[tamirkamara]

@carolynvs is this something we can do? I can take it...

[carolynvs]

@tamirkamara absolutely, I would really appreciate help getting this resolved sooner.

Here is the code that I think needs to be changed:

terraform-mixin/pkg/terraform/build.go

Lines 11 to 18 in 465b046

	const dockerfileLines = `
	RUN apt-get update && apt-get install -y wget unzip && \
	wget https://releases.hashicorp.com/terraform/{{.ClientVersion}}/terraform_{{.ClientVersion}}_linux_amd64.zip && \
	unzip terraform_{{.ClientVersion}}_linux_amd64.zip -d /usr/bin && \
	rm terraform_{{.ClientVersion}}_linux_amd64.zip
	COPY {{.WorkingDir}}/{{.InitFile}} $BUNDLE_DIR/{{.WorkingDir}}/
	RUN cd $BUNDLE_DIR/{{.WorkingDir}} && terraform init -backend=false
	`

If you have any questions, just let me know. 👍

[tamirkamara]

When running the mirror it duplicated the data that was fetched by the init command. In my custom docker file I delete the data downloaded by the init command and everything works fine. I have bundles with 5 terraform plugins and that accounts for ~300MB that are saved.

How do I know in the build time if an init will be run during runtime? init.go includes some logic around it but I wasn't sure if an init would always run or not...
@carolynvs

[carolynvs]

I think that we always run init at runtime, even when it's not strictly required.

terraform-mixin/pkg/terraform/terraform.go

Lines 119 to 120 in 465b046

	fmt.Println("Initializing Terraform...")
	err := m.Init(step.BackendConfig)

In #80 I proposed that we only call init at runtime if a remote backend was specified and otherwise skip it.