FROM --platform=$BUILDPLATFORM codeberg.org/forgejo/golang:1.19-alpine3.17 AS build-env
ARG BUILDPLATFORM

ARG GOPROXY
ENV GOPROXY ${GOPROXY:-direct}

ARG TAG main

ARG CI_COMMIT_SHA
ARG CI_REPO_CLONE_URL

# Shorthands for easy use and ease of replacement
ARG OUT "/out-bins"
ARG DR "/docker/root"

# Check vars and create directories
RUN test -n "$CI_COMMIT_SHA" || (echo "CI_COMMIT_SHA is required but not set" >&2 && exit 1) && \
  test -n "$CI_REPO_CLONE_URL" || (echo "CI_REPO_CLONE_URL is required but not set" >&2 && exit 1) && \
  echo "Running prep for ${CI_REPO_CLONE_URL} commit ${CI_COMMIT_SHA}" && \
  mkdir -p "${OUT}/linux/amd64" && \
  mkdir -p "${OUT}/linux/arm64" && \
  mkdir /build && \
  mkdir -p "${DR}"

# Copying the arch specific binaries to the path easily accessible in the next step and rename them to gitea
COPY --chmod=755 /source/dist/binaries/forgejo-$TAG-linux-amd64 "${OUT}/linux/amd64/gitea"
COPY --chmod=755 /source/dist/binaries/forgejo-$TAG-linux-arm64 "${OUT}/linux/arm64/gitea"

WORKDIR /build

RUN  echo "setting up git" && \
  # quiet down git
  git config --global init.defaultBranch dummy  && \
  git config --global advice.detachedHead false && \
  git init && \
  git remote add origin ${CI_REPO_CLONE_URL} && \
  # shallow clone as we just need the current data, keeps the "clone" really small
  git fetch --depth 1 origin ${CI_COMMIT_SHA} && \
  git checkout FETCH_HEAD && \
  export ENV2INI="environment-to-ini" && \
  export GOFILE="contrib/$ENV2INI/$ENV2INI.go" && \
  echo "compiling for linux/amd64" && \
  GOOS=linux GOARCH=amd64 go build -o "${OUT}/linux/amd64/$ENV2INI" "${GOFILE}" && \
  echo "compiling for linux/arm64" && \
  GOOS=linux GOARCH=arm64 go build -o "${OUT}/linux/arm64/$ENV2INI "${GOFILE}" && \
  cd / && \
  echo "Copying future root addons" && \
  cp -r /build"${DR}/* "${DR}/ && \
  echo "Fixing permissions" && \
  chmod 755 "${DR}/usr/bin/entrypoint "${DR}/usr/local/bin/gitea "${DR}/etc/s6/gitea/* "${DR}/etc/s6/openssh/* "${DR}/etc/s6/.s6-svscan/* && \
  echo "removing git repo" && \
  rm -Rf /build

# Main build
FROM codeberg.org/forgejo/alpine:3.17.0
LABEL maintainer="contact@forgejo.org"

ARG TARGETPLATFORM
ENV TARGETPLATFORM=${TARGETPLATFORM:-linux/amd64}

EXPOSE 22 3000

RUN apk --no-cache add \
  bash \
  ca-certificates \
  curl \
  gettext \
  git \
  linux-pam \
  openssh \
  s6 \
  sqlite \
  su-exec \
  gnupg \
  tzdata

RUN addgroup \
  -S -g 1000 \
  git && \
  adduser \
  -S -H -D \
  -h /data/git \
  -s /bin/bash \
  -u 1000 \
  -G git \
  git && \
  echo "git:*" | chpasswd -e

ENV USER git
ENV GITEA_CUSTOM /data/gitea

VOLUME ["/data"]

ENTRYPOINT ["/usr/bin/entrypoint"]
CMD ["/bin/s6-svscan", "/etc/s6"]

ARG OUT "/out-bins"
ARG DR "/docker/root"

COPY --from=build-env "${DR}" /
COPY --from=build-env --chmod=755 "${OUT}/$TARGETPLATFORM/*" /app/gitea/
# unsure it it's better to just use 2 copys and bring it to the correct place
# or ln -s (had mixed results usually ln -s makes a smaller end result)
RUN ln -s /app/gitea/environment-to-ini /usr/local/bin/environment-to-ini