Dockerfile.dev

# Use the official ocaml/opam image: ships with a current opam (2.2+) and a
# pre-built OCaml 5.1 switch, avoiding the apt-shipped opam 2.1 which can't
# parse some current opam-repository entries.
FROM ocaml/opam:ubuntu-24.04-ocaml-5.6

USER root

ENV DEBIAN_FRONTEND=noninteractive \
    OPAMYES=true \
    OPAMJOBS=4

RUN apt-get update && apt-get install -y --no-install-recommends \
      build-essential pkg-config m4 unzip rsync git curl ca-certificates sudo \
      linux-tools-generic linux-tools-common \
      valgrind \
      google-perftools libgoogle-perftools-dev \
      strace ltrace lsof procps numactl util-linux \
      python3 python3-pip jq \
      libgmp-dev libffi-dev libssl-dev zlib1g-dev libpcre3-dev \
  && rm -rf /var/lib/apt/lists/*

# perf is shipped under linux-tools-<kernel>; expose a stable symlink.
RUN ln -sf "$(find /usr/lib/linux-tools -name perf | head -n1)" /usr/local/bin/perf || true

# Make the opam user able to use sudo for any container-side fixups.
RUN echo 'opam ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers

USER opam
WORKDIR /home/opam

# Refresh the repo (the base image ships a snapshot) and install dev tools.
# ocamlformat is pinned to match the version in dune-project so `make fmt`
# inside the container produces the same output as CI.
RUN opam update -y \
 && opam install -y dune ocaml-lsp-server ocamlformat.0.27.0 utop

WORKDIR /workspace
CMD ["/bin/bash"]