Dockerfile: manually install opam and use Alpine-3.17

Author: monadius

Dockerfile

@@ -1,42 +1,63 @@
-FROM ubuntu:22.04
+FROM alpine:3.17 AS builder
 
-RUN set -ex; \
-    useradd --create-home codewarrior; \
-    mkdir -p /workspace; \
-    chown -R codewarrior:codewarrior /workspace;
-
-ENV OPAMROOT=/opt/opam \
-    OPAMCOLOR=never
+ENV OPAMROOT=/opt/ocaml
 
 RUN set -ex; \
     mkdir -p $OPAMROOT; \
-    chown codewarrior:codewarrior $OPAMROOT; \
-    apt-get update; \
-    apt-get install -y --no-install-recommends \
-        software-properties-common \
-        libgmp-dev \
+    adduser -D codewarrior; \
+    chown -R codewarrior:codewarrior /opt/ocaml; \
+    apk update; \
+    apk add --virtual .build-deps \
+        build-base \
+        ocaml-compiler-libs \
+        gmp-dev \
         opam \
     ;
 
 USER codewarrior
-ENV USER=codewarrior \
-    HOME=/home/codewarrior
+ENV USER=codewarrior
 
-RUN opam init -y --shell-setup --compiler=4.14.0 --disable-sandboxing
+RUN set -ex; \
+    opam init -y --disable-sandboxing --compiler=5.0.0;
 
-RUN opam install -y \
-        'ounit2=2.2.6' \
-        'ocamlfind=1.9.3' \
-        'ocamlbuild=0.14.1' \
+RUN set -ex; \
+    opam install -y \
+        'batteries=3.6.0' \
+        'base=v0.15.1' \
+        'domainslib=0.5.0' \
+        'ocamlbuild=0.14.2' \
+        'ocamlfind=1.9.6' \
+        'ounit2=2.2.7' \
         'zarith=1.12' \
-        'batteries=3.5.1' \
-        'core=v0.15.0' \
     ;
 
-ENV OPAM_SWITCH_PREFIX=$OPAMROOT/4.14.0 \
-    CAML_LD_LIBRARY_PATH=$OPAMROOT/4.14.0/lib/stublibs:$OPAMROOT/4.14.0/lib/ocaml/stublibs:$OPAMROOT/4.14.0/lib/ocaml \
-    OCAML_TOPLEVEL_PATH=$OPAMROOT/4.14.0/lib/toplevel \
-    PATH=$OPAMROOT/4.14.0/bin:$PATH
+FROM alpine:3.17
+
+RUN set -ex; \
+    apk add --no-cache \
+        gcc \
+        gmp-dev \
+        musl-dev \
+    ;
+
+COPY --from=builder \
+    /opt/ocaml/5.0.0/bin/ocamlc.opt \
+    /opt/ocaml/5.0.0/bin/ocamlopt.opt \
+    /opt/ocaml/5.0.0/bin/ocamldep.opt \
+    /opt/ocaml/5.0.0/bin/ocamlbuild \
+    /opt/ocaml/5.0.0/bin/ocamlfind \
+    /opt/ocaml/5.0.0/bin/
+COPY --from=builder \
+    /opt/ocaml/5.0.0/lib/ /opt/ocaml/5.0.0/lib/
+
+RUN set -ex; \
+    adduser -D codewarrior; \
+    mkdir /workspace; \
+    chown -R codewarrior:codewarrior /workspace;
+
+USER codewarrior
+ENV USER=codewarrior \
+    PATH=/opt/ocaml/5.0.0/bin:$PATH
 
-COPY workspace/test.ml /workspace/test.ml
-COPY workspace/_tags /workspace/_tags
+COPY --chown=codewarrior:codewarrior workspace/. /workspace/
+WORKDIR /workspace\

workspace/_tags

@@ -1,2 +1,2 @@
 <cwtest.ml> or <cwtest.native> or <tests.ml>: package(ounit2)
-not <cwtest.ml>: package(batteries), package(base), package(domainslib), package(zarith)
+not <cwtest.ml>: thread, package(batteries), package(base), package(domainslib), package(zarith)