# Stage 1: build artifact
FROM golang:1.19.2-alpine AS builder

WORKDIR /app
COPY . /app
RUN CGO_ENABLED=0 go build -trimpath -ldflags "-s -w" -v -o atlantis .

# Stage 2
# The runatlantis/atlantis-base is created by docker-base/Dockerfile.
FROM ghcr.io/runatlantis/atlantis-base:2022.10.06 AS base

# Get the architecture the image is being built for
ARG TARGETPLATFORM

# install terraform binaries
ENV DEFAULT_TERRAFORM_VERSION=1.3.2

# In the official Atlantis image we only have the latest of each Terraform version.
SHELL ["/bin/bash", "-o", "pipefail", "-c"]
RUN AVAILABLE_TERRAFORM_VERSIONS="0.11.15 0.12.31 0.13.7 0.14.11 0.15.5 1.0.11 1.1.9 1.2.9 ${DEFAULT_TERRAFORM_VERSION}" && \
    case "${TARGETPLATFORM}" in \
        "linux/amd64") TERRAFORM_ARCH=amd64 ;; \
        "linux/arm64") TERRAFORM_ARCH=arm64 ;; \
        "linux/arm/v7") TERRAFORM_ARCH=arm ;; \
        *) echo "ERROR: 'TARGETPLATFORM' value expected: ${TARGETPLATFORM}"; exit 1 ;; \
    esac && \
    for VERSION in ${AVAILABLE_TERRAFORM_VERSIONS}; do \
        curl -LOs "https://releases.hashicorp.com/terraform/${VERSION}/terraform_${VERSION}_linux_${TERRAFORM_ARCH}.zip" && \
        curl -LOs "https://releases.hashicorp.com/terraform/${VERSION}/terraform_${VERSION}_SHA256SUMS" && \
        sed -n "/terraform_${VERSION}_linux_${TERRAFORM_ARCH}.zip/p" "terraform_${VERSION}_SHA256SUMS" | sha256sum -c && \
        mkdir -p "/usr/local/bin/tf/versions/${VERSION}" && \
        unzip "terraform_${VERSION}_linux_${TERRAFORM_ARCH}.zip" -d "/usr/local/bin/tf/versions/${VERSION}" && \
        ln -s "/usr/local/bin/tf/versions/${VERSION}/terraform" "/usr/local/bin/terraform${VERSION}" && \
        rm "terraform_${VERSION}_linux_${TERRAFORM_ARCH}.zip" && \
        rm "terraform_${VERSION}_SHA256SUMS"; \
    done && \
    ln -s "/usr/local/bin/tf/versions/${DEFAULT_TERRAFORM_VERSION}/terraform" /usr/local/bin/terraform

ENV DEFAULT_CONFTEST_VERSION=0.34.0

RUN AVAILABLE_CONFTEST_VERSIONS="${DEFAULT_CONFTEST_VERSION}" && \
    case ${TARGETPLATFORM} in \
        "linux/amd64") CONFTEST_ARCH=x86_64 ;; \
        "linux/arm64") CONFTEST_ARCH=arm64 ;; \
        # There is currently no compiled version of conftest for armv7
        "linux/arm/v7") CONFTEST_ARCH=x86_64 ;; \
    esac && \
    for VERSION in ${AVAILABLE_CONFTEST_VERSIONS}; do \
        curl -LOs https://github.com/open-policy-agent/conftest/releases/download/v${VERSION}/conftest_${VERSION}_Linux_${CONFTEST_ARCH}.tar.gz && \
        curl -LOs https://github.com/open-policy-agent/conftest/releases/download/v${VERSION}/checksums.txt && \
        sed -n "/conftest_${VERSION}_Linux_${CONFTEST_ARCH}.tar.gz/p" checksums.txt | sha256sum -c && \
        mkdir -p /usr/local/bin/cft/versions/${VERSION} && \
        tar -C /usr/local/bin/cft/versions/${VERSION} -xzf conftest_${VERSION}_Linux_${CONFTEST_ARCH}.tar.gz && \
        ln -s /usr/local/bin/cft/versions/${VERSION}/conftest /usr/local/bin/conftest${VERSION} && \
        rm conftest_${VERSION}_Linux_${CONFTEST_ARCH}.tar.gz && \
        rm checksums.txt; \
    done

RUN ln -s /usr/local/bin/cft/versions/${DEFAULT_CONFTEST_VERSION}/conftest /usr/local/bin/conftest

# copy binary
COPY --from=builder /app/atlantis /usr/local/bin/atlantis

# copy docker entrypoint
COPY docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh

ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["server"]