Dockerfile-minimized

#
# Dockerfile to build and run ugrep in a container (production/minimized environment).
#
# This file creates the bare essentials to run ugrep in a container, with nothing else.
# It's a minimized environment, with no development tools, no git, no make, etc.
# It's perfect for running ugrep in a compact container.
#
# Build the ugrep image:
#   $ docker build -f Dockerfile-minimized -t ugrep .
#
# Execute ugrep in the container (The / of the host is accessible in /mnt directory in the container):
#   $ docker run -v /:/mnt -it ugrep --help
# or run bash in the container instead:
#   $ docker run -v /:/mnt --entrypoint /bin/bash -it ugrep
#   $ ugrep --help

FROM ubuntu AS builder

RUN apt-get update

RUN apt-get install -y --no-install-recommends \
    autoconf \
    automake \
    build-essential \
    ca-certificates \
    pkg-config \
    make \
    vim \
    git \
    clang \
    wget \
    unzip \
    libpcre2-dev \
    libz-dev \
    libbz2-dev \
    liblzma-dev \
    liblz4-dev \
    libzstd-dev \
    libbrotli-dev

WORKDIR /ugrep

# Clone ugrep from GitHub
RUN git clone --single-branch --depth=1 https://github.com/Genivia/ugrep /ugrep

# Local build of ugrep
# If you want to build ugrep from a local source, uncomment the following line:
# ADD . /ugrep

RUN autoreconf -fi
RUN ./build.sh



# Create a tarball with the necessary libraries to run ugrep in a minimized environment
# Some large libraries are excluded to keep the image size small
RUN tar -czvf /libs.tar.gz \
    --exclude=/lib/x86_64-linux-gnu/libclang* \
    --exclude=/lib/x86_64-linux-gnu/libicudata* \
    --exclude=/lib/x86_64-linux-gnu/libtsan* \
    /lib/x86_64-linux-gnu/*.so* /lib64/*

# Use clean new image (alpine is small and compact compared to ubuntu)
FROM alpine AS production


# Copy libraries from the builder image
COPY --from=builder /libs.tar.gz /
RUN tar -C / -xzvf /libs.tar.gz
RUN rm /libs.tar.gz

# TODO: find a way to make `make install` work instead of calling install manually
WORKDIR /ugrep
COPY --from=builder /ugrep/bin/ug* ./
RUN install -d /usr/local/bin/ && install -D /ugrep/* /usr/local/bin/
RUN ugrep --version

ENTRYPOINT [ "ugrep" ]