Dockerized terraform bundler

Dockerfile

FROM golang:alpine

RUN apk update && apk upgrade && \
    apk add --no-cache git zip

ARG TERRAFORM_VERSION
RUN git clone --single-branch --branch v${TERRAFORM_VERSION} https://github.com/hashicorp/terraform.git /go/src/github.com/hashicorp/terraform

RUN cd $GOPATH/src/github.com/hashicorp/terraform && echo $GOPATH && go install ./tools/terraform-bundle

ADD terraform-version.hcl /

ADD entrypoint.sh /

ENTRYPOINT [ "/entrypoint.sh" ]

entrypoint.sh

#!/bin/sh

terraform-bundle package -os=linux -arch=amd64 /terraform-version.hcl
mv *.zip /output/terraform-bundle.zip

prepare-terraform-bundle.sh

#!/bin/bash

set -euo pipefail

MYDIR=$(readlink -e $(dirname "$0"))
TERRAFORM_VERSION="${TERRAFORM_VERSION:-0.10.4}"

docker build -t terraform-bundle --build-arg "TERRAFORM_VERSION=${TERRAFORM_VERSION}" src/deps/terraform
docker run -v /tmp:/output --rm -it terraform-bundle "$@"
cp /tmp/terraform-bundle.zip "$(dirname "${MYDIR}")"

terraform-version.hcl

#
# Configuration used by terraform-bundle to fetch all required plugins ONCE.
#
# (see https://github.com/hashicorp/terraform/tree/master/tools/terraform-bundle)
# (why https://github.com/hashicorp/terraform/issues/15801)
#

terraform {
  version = "0.10.4"
}

providers {
  aws = ["~> 0.1"]
  external = ["~> 0.1"]
  null = ["~> 0.1"]
  template = ["~> 0.1"]
  terraform = ["~> 0.1"]
  tls = ["~> 0.1"]
}