Use toolcache properly to download terraform

[shahariaazam]

Properly use GitHub toolcache to avoid repeated download each time. Previously toolcache was just used to download the binary but it was not storing the downloaded binary to cache.

Now, it will check if the tool is exist in GitHub toolcache or not. If exists, it will not download the binary again and use the cache path instead.

Debug logs when tool not exists in cache

root@ffe405d4da32:/home/app/src# RUNNER_TEMP=/tmp RUNNER_TOOL_CACHE=/tmp/toolcache node index.js
::debug::Finding releases for Terraform version 0.11.14
::debug::Getting build for Terraform version 0.11.14: linux amd64
::debug::isExplicit: 0.11.14
::debug::explicit? true
::debug::checking cache: /tmp/toolcache/terraform/0.11.14/amd64
::debug::not found
::debug::Downloading Terraform CLI from https://releases.hashicorp.com/terraform/0.11.14/terraform_0.11.14_linux_amd64.zip
::debug::Downloading https://releases.hashicorp.com/terraform/0.11.14/terraform_0.11.14_linux_amd64.zip
::debug::Destination /tmp/3f4e19fb-5713-410d-a67a-fe2dd3a6636e
::debug::download complete
::debug::Extracting Terraform CLI zip file
[command]/usr/bin/unzip -o -q /tmp/3f4e19fb-5713-410d-a67a-fe2dd3a6636e
::debug::Terraform CLI path is /tmp/a202733a-04c1-440d-b8fe-75c2bebe0e28.
::debug::Caching tool terraform 0.11.14 amd64
::debug::source dir: /tmp/a202733a-04c1-440d-b8fe-75c2bebe0e28
::debug::destination /tmp/toolcache/terraform/0.11.14/amd64
::debug::finished caching tool
::add-path::/tmp/toolcache/terraform/0.11.14/amd64
::add-path::

Debug logs when the tool already in cache.

root@ffe405d4da32:/home/app/src# RUNNER_TEMP=/tmp RUNNER_TOOL_CACHE=/tmp/toolcache node index.js
::debug::Finding releases for Terraform version 0.11.14
::debug::Getting build for Terraform version 0.11.14: linux amd64
::debug::isExplicit: 0.11.14
::debug::explicit? true
::debug::checking cache: /tmp/toolcache/terraform/0.11.14/amd64
::debug::Found tool in cache terraform 0.11.14 amd64
::add-path::/tmp/toolcache/terraform/0.11.14/amd64

[hashicorp-cla]

All committers have signed the CLA.

[jpogran]

Thank you for the contribution @shahariaazam! There is an existing PR #94 that is attempting to do the same work as yours. Can you comment on how your approach is different?

I also think you'll need to run the build step to generate the dist files.

[shahariaazam]

Thank you for the contribution @shahariaazam! There is an existing PR #94 that is attempting to do the same work as yours. Can you comment on how your approach is different?

I also think you'll need to run the build step to generate the dist files.

Cool! I didn't see that PR. #94 this also covered wrapper stuff as well. You can review any one of the PRs. If the author respond quickly you can review and merge that, otherwise I can add tests and cover wrapper stuff here as well.