Feature/git modules

[melbit-jonathanb]

Hi,

I needed support for Git based modules, so I put this together.

A few points:

• relies on system git and in CI/CD environments, credentials stored in git credential helpers or a ssh key. In non CI/CD environments, it does work with interactive authentication passed through from the git client.
• Only supports git style repositories (git or https git), not hosted via terraform's registry, nor other cvs.
• didn't mess with setup.py, but did add GitPython to requirements.txt
• It will download each repo every time init is called, I thought about stopping this, but I would prefer a fresh copy of each repo each time to stop any oddness I've seen with CI/CD recycling directory contents.
• hard coded temp directory, but with Windows and *Nix support.

Let me know what you think.

cheers,

Jon.

[melbit-jonathanb]

Found an issue and an edge case. One tic

[melbit-jonathanb]

Right, found two issues which would have caused problems.

1. some modules have ?ref=// - this is not really mentioned in terraform, but seems to be something which can happen. I have pulled apart the directory specification and ignored it, as the tool parses all directories.
2. I had re-used some of the directory scanning and failed to change the variable names, which in some cases caused incorrect attempts to load files which weren't there. Fixed by changing variable names.

[JEHAL981]

@elmundio87 Hey, just wondering if this going to be merged too master?

[elmundio87]

Thanks for the PR!

@melbit-jonathanb & @JEHAL981 I will review the code changes tonight, and if all's good I'll create a new release.

-Ed

[elmundio87]

Released in 2.7.0

[melbit-jonathanb]

@elmundio87 & @atward
Hi,
I've performed a number of changes as suggested. I now have it following the load order closer as per Adam's comments and have fixed up the module loading issues observed.

Changes:

• Fix elif issue.
• Tool now correctly parses only .tf files in nominated directory - or .tf files in a nominated module.
• Fixed error with evaluating source of module.
• Added condition that tf files must be over 20 bytes before evaluation.
  • I had to add this as Hashicorp have said it's ok to have blank .tf files and this allows someone to have blank file with a comment in it. I'm not sure how to get around this in any other manner, as the pyhcl tool seems to raise an exception if there's nothing to load.
• Added support for multiple "identical" repo directories via semi-random dirname.
  • I am not deleting the /tmp/terraform_validate contents after finishing. This is mainly to allow for debugging. I am open to cleaning up the directory after.
• Added exception and message if no valid terraform is loaded.

Let me know what you think.
cheers,

Jon.