Add terraform-provider-infracost to the Dockerfile, README and GitHub action

Author: aliscott

.github/workflows/go.yml

@@ -30,6 +30,17 @@ jobs:
             dep ensure
         fi
 
+    - name: Check out terraform-provider-infracost@master
+      uses: actions/checkout@v2
+      with:
+        repository: infracost/terraform-provider-infracost
+        ref: refs/heads/master
+        path: terraform-provider-infracost
+
+    - name: Install terraform-provider-infracost
+      run: sudo make install
+      working-directory: terraform-provider-infracost
+
     - name: Run golangci-lint
       uses: golangci/[email protected]
       with:

Dockerfile

@@ -2,22 +2,25 @@ FROM golang:1.15 as builder
 
 ARG ARCH=linux
 ARG TERRAFORM_VERSION=0.12.25
+ARG TERRAFORM_PROVIDER_INFRACOST_VERSION=latest
 
 # Set Environment Variables
 SHELL ["/bin/bash", "-c"]
 ENV HOME /app
 ENV CGO_ENABLED 0
-ENV GOOS linux
 
 # Install Packages
 RUN wget -q https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_${ARCH}_amd64.zip
-RUN apt-get update && apt-get -y install zip -y
+RUN apt-get update && apt-get -y install zip jq -y
 RUN unzip terraform*.zip && \
     mv terraform /usr/local/bin && \
     chmod +x /usr/local/bin/terraform
 
-# Build Application
 WORKDIR /app
+COPY scripts/install_provider.sh scripts/install_provider.sh
+RUN scripts/install_provider.sh ${TERRAFORM_PROVIDER_INFRACOST_VERSION} /usr/local/bin/
+
+# Build Application
 COPY . .
 RUN make deps
 RUN make build
@@ -27,8 +30,8 @@ FROM alpine:3.12 as app
 ARG TERRAFORM_VERSION=0.12.25
 RUN apk --no-cache add ca-certificates terraform=${TERRAFORM_VERSION}-r0
 WORKDIR /root/
+COPY --from=builder /usr/local/bin/terraform-provider-infracost* /usr/bin/
 COPY --from=builder /app/build/infracost /usr/local/bin/infracost
 RUN chmod +x /usr/local/bin/infracost
-
 ENTRYPOINT [ "infracost" ]
 CMD [ "--help" ]

Makefile

@@ -1,7 +1,16 @@
 BINARY := infracost
 ENTRYPOINT := cmd/infracost/main.go
+TERRAFORM_PROVIDER_INFRACOST_VERSION := latest
 
-.PHONY: deps run build windows linux darwin build_all clean test fmt lint
+ifndef $(GOOS)
+	GOOS=$(shell go env GOOS)
+endif
+
+ifndef $(GOARCH)
+	GOARCH=$(shell go env GOARCH)
+endif
+
+.PHONY: deps run build windows linux darwin build_all release install_provider clean test fmt lint
 
 deps:
 	go mod download
@@ -28,10 +37,12 @@ release: build_all
 	cd build; tar -czf $(BINARY)-linux-amd64.tar.gz $(BINARY)-linux-amd64
 	cd build; tar -czf $(BINARY)-darwin-amd64.tar.gz $(BINARY)-darwin-amd64
 
+install_provider:
+	scripts/install_provider.sh $(TERRAFORM_PROVIDER_INFRACOST_VERSION)
+
 clean:
 	go clean
 	rm -rf build/$(BINARY)*
-	rm -rf release/$(BINARY)*
 
 test:
 	go test ./... $(or $(ARGS), -v -cover)

README.md

@@ -42,11 +42,16 @@ The [Infracost GitHub action](https://github.com/marketplace/actions/run-infraco
 
 ## Development
 
-Install dependencies:
+Install Go dependencies:
 ```sh
 make deps
 ```
 
+Install latest version of terraform-provider-infracost. If you want to use a local development version see [#using-a-local-version-of-terraform-provider-infracost](#using-a-local-version-of-terraform-provider-infracost)
+```sh
+make install_provider
+```
+
 Run the code:
 ```sh
 make run ARGS="--tfdir <Terraform Dir>"
@@ -67,6 +72,17 @@ Build:
 make build
 ```
 
+### Using a local version of terraform-provider-infracost
+
+To use a local development version of terraform-provider-infracost
+
+1. Fork/clone the [terraform-provider-infracost repository](https://github.com/infracost/terraform-provider-infracost)
+
+2. Inside the directory that you cloned the repository run the following to install the local version in your `~/.terraform.d/plugins` directory:
+  ```sh
+  make install
+  ```
+
 ## Contributing
 
 Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

scripts/install_provider.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+if ! command -v jq &> /dev/null
+then
+  echo "This script requires jq"
+  exit
+fi
+
+version=${1:-latest}
+if [ ! -z ${2+x} ]; then
+  install_path=${2}
+fi
+
+if [ ! -z $GITHUB_ACCESS_TOKEN} ]; then
+  github_headers="-H 'Authorization: token ${GITHUB_ACCESS_TOKEN}'"
+fi
+
+goos=$(go env GOOS)
+goarch=$(go env GOARCH)
+
+# Download the release assets from GitHub to a tmp directory
+tmp_dir=$(mktemp)
+if [ "$version" == "latest" ]; then
+  resp=$(curl "${github_headers}" https://api.github.com/repos/infracost/terraform-provider-infracost/releases/latest)
+  version=$(echo ${resp} | jq -r '.name')
+  echo ${resp} | jq -r '.assets[] | select (.name | contains("'${goos}'_'${goarch}'")) | .browser_download_url' | wget -P ${tmp_dir} -i -
+else
+  curl "${github_headers}" https://api.github.com/repos/infracost/terraform-provider-infracost/releases \
+      | jq -r '.[] | select (.name == "'${version}'") | .assets[] | select (.name | contains("${goos}_${goarch}")) | .browser_download_url' | wget -P ${tmp_dir} -i -
+fi
+
+# Unzip the release assets
+zip=$(ls ${tmp_dir} | grep "terraform-provider-infracost.*\.zip")
+unzip -od ${tmp_dir} ${tmp_dir}/${zip} && rm ${tmp_dir}/${zip}
+binary=$(ls ${tmp_dir} | grep "terraform-provider-infracost")
+
+# If the install path isn't set then use the default Terraform plugin install paths
+if [ -z ${install_path+x} ]; then
+  plugin_root_path=${HOME}/.terraform.d/plugins
+  install_path=${plugin_root_path}/infracost.io/infracost/infracost/${version}/${goos}_${goarch}
+
+  mkdir -p ${install_path}
+  mv ${tmp_dir}/${binary} ${install_path}/${binary}
+
+  # Add a link from the old-style plugin paths to maintain compatibility with older versions of Terraform
+  mkdir -p ${plugin_root_path}/${goos}_${goarch}
+  ln -sf ${install_path}/${binary} ${plugin_root_path}/${goos}_${goarch}/${binary}
+# Otherwise use the user-specified install path
+else
+  mkdir -p ${install_path}
+  mv ${tmp_dir}/${binary} ${install_path}/${binary}
+fi