Dockerfile

# syntax=docker/dockerfile:1

## Buildstage ##
FROM ghcr.io/linuxserver/baseimage-alpine:3.23 AS buildstage

ARG MOD_VERSION

RUN curl -L https://archive.org/download/kindlegen_linux_2_6_i386_v2_9/kindlegen_linux_2.6_i386_v2_9.tar.gz > kindlegen.tar.gz
RUN tar -zxvf kindlegen.tar.gz kindlegen
RUN chmod +rwx 'kindlegen'
RUN rm kindlegen.tar.gz

RUN \
  if [ -z ${MOD_VERSION} ]; then \
    echo "MOD_VERSION is not set. Fetching from GitHub..."; \
    MOD_VERSION=$(curl -s "https://api.github.com/repos/ciromattia/kcc/releases/latest" | jq -rc ".tag_name"); \
  else \
    echo "MOD_VERSION is already set to '${MOD_VERSION}'"; \
  fi && \
  echo "Using MOD_VERSION=${MOD_VERSION}" && \
  curl -L https://github.com/ciromattia/kcc/archive/refs/tags/${MOD_VERSION}.tar.gz > kcc.tar.gz && \
  tar -xzf kcc.tar.gz && \
  mv kcc-$(echo "${MOD_VERSION}" | sed 's/^.\(.*\)/\1/') kcc && \
  touch kcc/KCC_VERSION && \
  echo ${MOD_VERSION} > kcc/KCC_VERSION && \
  mkdir -p /root-layer/usr/local/bin && \
  mv kindlegen /root-layer/usr/local/bin/ && \
  mv kcc /root-layer/usr/local/bin/

COPY root/ /root-layer/

## Single layer deployed image ##
FROM scratch

LABEL maintainer="hvmzx"

# Add files from buildstage
COPY --from=buildstage /root-layer/ /