Initial implementation (#1)

* Initial implementation

* Add outputs

* test examples

* move curl args to var

* fix test for CI

* output sha256

* Update docs

.gitignore

@@ -0,0 +1,9 @@
+.build-harness
+build-harness
+.terraform
+*.tfstate
+*.tfstate.*
+.idea
+*.iml
+.viminfo
+.terraform.d

.travis.yml

@@ -0,0 +1,16 @@
+addons:
+  apt:
+    packages:
+      - git
+      - make
+      - curl
+
+install:
+  - make init
+
+script:
+  - make terraform/install
+  - make terraform/get-plugins
+  - make terraform/get-modules
+  - make terraform/lint
+  - make test

Makefile

@@ -0,0 +1,13 @@
+SHELL := /bin/bash
+
+# List of targets the `readme` target should call before generating the readme
+export README_DEPS ?= docs/targets.md docs/terraform.md
+
+-include $(shell curl -sSL -o .build-harness "https://git.io/build-harness"; echo .build-harness)
+
+## Lint terraform code
+lint:
+	$(SELF) terraform/install terraform/get-modules terraform/get-plugins terraform/lint terraform/validate
+
+test:
+	$(MAKE) -C examples/ test

README.md

@@ -1,2 +1,288 @@
-# terraform-data-external-module-artifact
-Terraform module to fetch any kind of artifacts using curl (binary and text okay)
+<!-- This file was automatically generated by the `build-harness`. Make all changes to `README.yaml` and run `make readme` to rebuild this file. -->
+[![README Header][readme_header_img]][readme_header_link]
+
+[![Cloud Posse][logo]](https://cpco.io/homepage)
+
+# terraform-external-module-artifact [![Build Status](https://travis-ci.org/cloudposse/terraform-external-module-artifact.svg?branch=master)](https://travis-ci.org/cloudposse/terraform-external-module-artifact) [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-external-module-artifact.svg)](https://github.com/cloudposse/terraform-external-module-artifact/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
+
+
+Terraform Module to fetch remote build artifacts via http(s) using `curl`. 
+
+
+---
+
+This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps. 
+[<img align="right" title="Share via Email" src="https://docs.cloudposse.com/images/ionicons/ios-email-outline-2.0.1-16x16-999999.svg"/>][share_email]
+[<img align="right" title="Share on Google+" src="https://docs.cloudposse.com/images/ionicons/social-googleplus-outline-2.0.1-16x16-999999.svg" />][share_googleplus]
+[<img align="right" title="Share on Facebook" src="https://docs.cloudposse.com/images/ionicons/social-facebook-outline-2.0.1-16x16-999999.svg" />][share_facebook]
+[<img align="right" title="Share on Reddit" src="https://docs.cloudposse.com/images/ionicons/social-reddit-outline-2.0.1-16x16-999999.svg" />][share_reddit]
+[<img align="right" title="Share on LinkedIn" src="https://docs.cloudposse.com/images/ionicons/social-linkedin-outline-2.0.1-16x16-999999.svg" />][share_linkedin]
+[<img align="right" title="Share on Twitter" src="https://docs.cloudposse.com/images/ionicons/social-twitter-outline-2.0.1-16x16-999999.svg" />][share_twitter]
+
+
+[![Terraform Open Source Modules](https://docs.cloudposse.com/images/terraform-open-source-modules.svg)][terraform_modules]
+
+
+
+It's 100% Open Source and licensed under the [APACHE2](LICENSE).
+
+
+
+
+
+
+
+We literally have [*hundreds of terraform modules*][terraform_modules] that are Open Source and well-maintained. Check them out! 
+
+
+
+
+
+
+## Introduction
+
+This terraform module uses the [`external`](https://www.terraform.io/docs/providers/external/data_source.html) data provider to execute `curl`, which downloads the file locally to the modules cache folder. 
+
+It's ideally suited for downloading public build artifacts (E.g. for use with Lambdas) associated with terraform modules. 
+We recommend using this pattern to avoid adding binary artifacts like `.zip` files to Git repositories.
+
+**NOTE:** The term `external` refers to the primary Terraform [provider](https://www.terraform.io/docs/providers/external/data_source.html) used in this module.
+
+## Dependencies
+
+  First make sure you have `curl` installed and that it exists in your `PATH` (E.g. `/usr/bin`).
+
+## Usage
+
+
+```hcl
+module "example" {
+  source     = "git::https://github.com/cloudposse/terraform-external-module-artifact.git?ref=master"
+  filename    = "test.zip"
+  git_ref     = "example"
+  module_name = "terraform-external-module-artifact"
+  module_path = "${path.module}"
+}
+```
+
+__NOTE:__ Leave `git_ref` blank and it will be automatically computed from the `module_path` 
+__NOTE:__ We've published [an artifact](https://artifacts.cloudposse.com/terraform-external-module-artifact/example/test.zip) for purpose of testing this module
+
+
+
+
+
+
+## Makefile Targets
+```
+Available targets:
+
+  help                                Help screen
+  help/all                            Display help for all targets
+  help/short                          This help short screen
+  lint                                Lint terraform code
+
+```
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| curl_arguments | Arguments that should get passed to `curl` | string | `-sSL` | no |
+| filename | Artifact filename | string | `lambda.zip` | no |
+| git_ref | Git hash corresponding to the remote artifact. Leave blank and it will be computed from the `module_path` checkout | string | `` | no |
+| module_name | Name of the terraform module | string | - | yes |
+| module_path | Local path to the terraform module; e.g. `${path.module}` | string | - | yes |
+| url | URL template for the remote artifact | string | `https://artifacts.cloudposse.com/$${module_name}/$${git_ref}/$${filename}` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| base64sha256 | Base64 encoded SHA256 hash of the local file |
+| file | Full path to the locally downloaded file |
+| git_ref | Git commit hash corresponding to the artifact |
+| url | URL corresponding to the artifact |
+
+
+
+
+## Share the Love 
+
+Like this project? Please give it a ★ on [our GitHub](https://github.com/cloudposse/terraform-external-module-artifact)! (it helps us **a lot**) 
+
+Are you using this project or any of our other projects? Consider [leaving a testimonial][testimonial]. =)
+
+
+## Related Projects
+
+Check out these related projects.
+
+- [terraform-null-smtp-mail](https://github.com/cloudposse/terraform-null-smtp-mail) - Terraform module to send transactional emails via an SMTP server (e.g. mailgun)
+
+
+
+
+## References
+
+For additional context, refer to some of these links. 
+
+- [curl](https://curl.haxx.se/) - command line tool and library for transferring data with URLs
+
+
+## Help
+
+**Got a question?**
+
+File a GitHub [issue](https://github.com/cloudposse/terraform-external-module-artifact/issues), send us an [email][email] or join our [Slack Community][slack].
+
+[![README Commercial Support][readme_commercial_support_img]][readme_commercial_support_link]
+
+## Commercial Support
+
+Work directly with our team of DevOps experts via email, slack, and video conferencing. 
+
+We provide [*commercial support*][commercial_support] for all of our [Open Source][github] projects. As a *Dedicated Support* customer, you have access to our team of subject matter experts at a fraction of the cost of a full-time engineer. 
+
+[![E-Mail](https://img.shields.io/badge/email-hello@cloudposse.com-blue.svg)][email]
+
+- **Questions.** We'll use a Shared Slack channel between your team and ours.
+- **Troubleshooting.** We'll help you triage why things aren't working.
+- **Code Reviews.** We'll review your Pull Requests and provide constructive feedback.
+- **Bug Fixes.** We'll rapidly work to fix any bugs in our projects.
+- **Build New Terraform Modules.** We'll [develop original modules][module_development] to provision infrastructure.
+- **Cloud Architecture.** We'll assist with your cloud strategy and design.
+- **Implementation.** We'll provide hands-on support to implement our reference architectures. 
+
+
+
+## Terraform Module Development
+
+Are you interested in custom Terraform module development? Submit your inquiry using [our form][module_development] today and we'll get back to you ASAP.
+
+
+## Slack Community
+
+Join our [Open Source Community][slack] on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.
+
+## Newsletter
+
+Signup for [our newsletter][newsletter] that covers everything on our technology radar.  Receive updates on what we're up to on GitHub as well as awesome new projects we discover. 
+
+## Contributing
+
+### Bug Reports & Feature Requests
+
+Please use the [issue tracker](https://github.com/cloudposse/terraform-external-module-artifact/issues) to report any bugs or file feature requests.
+
+### Developing
+
+If you are interested in being a contributor and want to get involved in developing this project or [help out](https://cpco.io/help-out) with our other projects, we would love to hear from you! Shoot us an [email][email].
+
+In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
+
+ 1. **Fork** the repo on GitHub
+ 2. **Clone** the project to your own machine
+ 3. **Commit** changes to your own branch
+ 4. **Push** your work back up to your fork
+ 5. Submit a **Pull Request** so that we can review your changes
+
+**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
+
+
+## Copyright
+
+Copyright © 2017-2018 [Cloud Posse, LLC](https://cpco.io/copyright)
+
+
+
+## License 
+
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0) 
+
+See [LICENSE](LICENSE) for full details.
+
+    Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+      https://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+
+
+
+
+
+
+
+
+
+## Trademarks
+
+All other trademarks referenced herein are the property of their respective owners.
+
+## About
+
+This project is maintained and funded by [Cloud Posse, LLC][website]. Like it? Please let us know by [leaving a testimonial][testimonial]!
+
+[![Cloud Posse][logo]][website]
+
+We're a [DevOps Professional Services][hire] company based in Los Angeles, CA. We ❤️  [Open Source Software][we_love_open_source].
+
+We offer [paid support][commercial_support] on all of our projects.  
+
+Check out [our other projects][github], [follow us on twitter][twitter], [apply for a job][jobs], or [hire us][hire] to help with your cloud strategy and implementation.
+
+
+
+### Contributors
+
+|  [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] |
+|---|
+
+  [osterman_homepage]: https://github.com/osterman
+  [osterman_avatar]: https://github.com/osterman.png?size=150
+
+
+
+[![README Footer][readme_footer_img]][readme_footer_link]
+[![Beacon][beacon]][website]
+
+  [logo]: https://cloudposse.com/logo-300x69.svg
+  [docs]: https://cpco.io/docs
+  [website]: https://cpco.io/homepage
+  [github]: https://cpco.io/github
+  [jobs]: https://cpco.io/jobs
+  [hire]: https://cpco.io/hire
+  [slack]: https://cpco.io/slack
+  [linkedin]: https://cpco.io/linkedin
+  [twitter]: https://cpco.io/twitter
+  [testimonial]: https://cpco.io/leave-testimonial
+  [newsletter]: https://cpco.io/newsletter
+  [email]: https://cpco.io/email
+  [commercial_support]: https://cpco.io/commercial-support
+  [we_love_open_source]: https://cpco.io/we-love-open-source
+  [module_development]: https://cpco.io/module-development
+  [terraform_modules]: https://cpco.io/terraform-modules
+  [readme_header_img]: https://cloudposse.com/readme/header/img?repo=cloudposse/terraform-external-module-artifact
+  [readme_header_link]: https://cloudposse.com/readme/header/link?repo=cloudposse/terraform-external-module-artifact
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+  [readme_commercial_support_img]: https://cloudposse.com/readme/commercial-support/img?repo=cloudposse/terraform-external-module-artifact
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