orbies/[email protected]

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# This code is licensed from CircleCI to the user under the MIT license.
# See here for details: https://circleci.com/developer/orbs/licensing
version: 2.1
description: |
  Terraform orb for init, validate, format, lint and apply code.    

executors:
  tf:
    docker:
      - image: hashicorp/terraform:0.14.11
    environment:
      TF_IN_AUTOMATION: "true"
    working_directory: << parameters.working-directory >>
    parameters:
      working-directory:
        default: .
        type: string
  circleci-base-image:
    docker:
      - image: cimg/base:2020.08
    working_directory: << parameters.working-directory >>
    parameters:
      working-directory:
        default: .
        type: string
  python:
    docker:
      - image: cimg/python:3.9.6
    working_directory: << parameters.working-directory >>
    parameters:
      working-directory:
        default: .
        type: string

default_config: &default_config
  parameters: &default_params
    access_key:
      type: string
    secret_access_key:
      type: string
    environment:
      type: string
    aws_region:
      default: "eu-west-1"
      type: string

conditional_checkout: &conditional_checkout
  when:
    condition:
      equal: [true, << parameters.checkout >>]
    steps:
      - checkout
conditional_attach_workspace: &conditional_attach_workspace
  when:
    condition:
      equal: [true, << parameters.attach_workspace >>]
    steps:
      - attach_workspace:
          at: .

add_keys: &add_keys
  run:
    name: Set AWS env vars
    command: |
      echo "export AWS_ACCESS_KEY_ID=<< parameters.access_key >>" >> $BASH_ENV
      echo "export AWS_SECRET_ACCESS_KEY=<< parameters.secret_access_key >>" >> $BASH_ENV
      echo "export AWS_DEFAULT_REGION=<< parameters.aws_region >>" >> $BASH_ENV

commands:
  configure-ssh-known-hosts:
    description: Adds github to ~/.ssh/known_hosts
    steps:
      - run: mkdir -p ~/.ssh && ssh-keyscan github.com >> ~/.ssh/known_hosts
  validate:
    description: Terraform init, validate and fmt.
    <<: *default_config
    steps:
      - *add_keys
      - configure-ssh-known-hosts
      - run:
          name: Terraform initialization
          command: cd "<< parameters.environment >>" && terraform init -input=false
      - run:
          name: Validate terraform configs
          command: find * -type f -name "*.tf" ! -path "*/.terraform" ! -path "*/.terraform/*" ! -path modules/ ! -path "modules/*" -exec dirname {} \; | sort -u | while read directory; do terraform validate; done || exit 1
      - run:
          name: Check if Terraform configurations are properly formatted
          command: if [[ -n "$(terraform fmt -recursive -write=false)" ]]; then echo "Some terraform files need be formatted, run 'terraform fmt' to fix"; exit 1; fi
      - run:
          name: Terraform plan and output the tfplan
          command: cd "<< parameters.environment >>" && terraform plan -input=false -out=tfplan
  checkov:
    description: Run Checkov static code analysis tool
    parameters:
      environment:
        type: string
    steps:
      - run:
          name: install checkov
          command: pip install -Iv checkov==2.0.392
      - run:
          name: Run checkov
          command: cd << parameters.environment >> && checkov -d .
  lint:
    description: Run terraform linter on files
    parameters:
      environment:
        type: string
      working_directory:
        type: string
      config_file:
        type: string
        default: .tflint.hcl
    steps:
      - attach_workspace:
          at: << parameters.working_directory >>
      - run:
          name: Install tflint
          command: curl -L "$(curl -Ls https://api.github.com/repos/terraform-linters/tflint/releases/latest | grep -o -E "https://.+?_linux_amd64.zip")" -o tflint.zip && unzip tflint.zip && mkdir -p /home/circleci/.local/bin/ && mv -v tflint /home/circleci/.local/bin/ && rm tflint.zip
      - run:
          name: Run tflint
          command: cd "<< parameters.environment >>" && tflint --module -c << parameters.working_directory >>/<< parameters.config_file >>
  apply:
    description: Applies terraform configuration
    <<: *default_config
    steps:
      - *add_keys
      - run:
          name: Running terraform apply
          command: |
            cd "<< parameters.environment >>" && terraform apply -input=false tfplan
  install-aws-cli:
    description: Install aws cli
    steps:
      - run:
          name: Install aws cli
          command: |
            apk --no-cache add binutils curl
            GLIBC_VER=$(curl -s https://api.github.com/repos/sgerrand/alpine-pkg-glibc/releases/latest | grep tag_name | cut -d : -f 2,3 | tr -d \",' ')
            curl -sL https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub -o /etc/apk/keys/sgerrand.rsa.pub
            curl -sLO https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${GLIBC_VER}/glibc-${GLIBC_VER}.apk
            curl -sLO https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${GLIBC_VER}/glibc-bin-${GLIBC_VER}.apk
            apk add --no-cache glibc-${GLIBC_VER}.apk glibc-bin-${GLIBC_VER}.apk
            curl -sL https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip -o awscliv2.zip
            unzip awscliv2.zip
            aws/install
            rm -rf awscliv2.zip aws /usr/local/aws-cli/v2/*/dist/aws_completer /usr/local/aws-cli/v2/*/dist/awscli/data/ac.index /usr/local/aws-cli/v2/*/dist/awscli/examples
            apk --no-cache del binutils curl
            rm glibc-${GLIBC_VER}.apk glibc-bin-${GLIBC_VER}.apk
            rm -rf /var/cache/apk/*
jobs:
  validate:
    executor: tf
    shell: /bin/sh -leo pipefail
    environment:
      - BASH_ENV: /etc/profile
    parameters:
      <<: *default_params
      working_directory:
        type: string
      checkout:
        type: boolean
        default: true
      attach_workspace:
        type: boolean
        default: false
    working_directory: << parameters.working_directory >>
    steps:
      - *conditional_checkout
      - *conditional_attach_workspace
      - run:
          name: Install openssl package
          command: apk add openssl
      - validate:
          access_key: << parameters.access_key >>
          secret_access_key: << parameters.secret_access_key >>
          environment: << parameters.environment >>
      - persist_to_workspace:
          root: << parameters.working_directory >>
          paths: << parameters.environment >>/tfplan
            << parameters.environment >>/.terraform/*
            << parameters.environment >>/.terraform.lock.hcl
            .tflint.hcl
  lint:
    executor: circleci-base-image
    parameters:
      checkout:
        type: boolean
        default: false
      environment:
        type: string
      working_directory:
        type: string
      config_file:
        type: string
        default: .tflint.hcl
    working_directory: << parameters.working_directory >>
    steps:
      - *conditional_checkout
      - lint:
          config_file: << parameters.config_file >>
          environment: << parameters.environment >>
          working_directory: << parameters.working_directory >>
  apply:
    executor: tf
    shell: /bin/sh -leo pipefail
    environment:
      - BASH_ENV: /etc/profile
    parameters:
      <<: *default_params
      working_directory:
        type: string
    working_directory: << parameters.working_directory >>
    steps:
      - install-aws-cli
      - attach_workspace:
          at: << parameters.working_directory >>
      - apply:
          access_key: << parameters.access_key >>
          secret_access_key: << parameters.secret_access_key >>
          environment: << parameters.environment >>
  checkov:
    executor: python
    parameters:
      checkout:
        type: boolean
        default: false
      attach_workspace:
        type: boolean
        default: false
      working_directory:
        type: string
      environment:
        type: string
    working_directory: << parameters.working_directory >>
    steps:
      - *conditional_checkout
      - *conditional_attach_workspace
      - attach_workspace:
          at: << parameters.working_directory >>
      - checkov:
          environment: << parameters.environment >>