Fix MirageOS Libraries on CI

$ sudo apt install docker.io
$ sudo docker pull alpine:3.19.1

$ sudo docker pull ocaml/opam:alpine-3.19-ocaml-5.1 
$ sudo docker run -it ocaml/opam:alpine-3.19-ocaml-5.1 bash

$ git clone https://github.com/mirage/either.git 
$ opam install dune
$ cd either
$ dune build
$ cd _build/default/src/.either.jobs/byte/
$ ocaml
# #load "either.cmo" ;;
# Either.left ;;

$ git clone https://github.com/mirage/coin.git
$ opam install . --deps-only -y
$ dune build
$ dune runtest
$ dune exec -- ./_build/default/gen/generate.exe 

$ git clone https://github.com/mirage/bechamel.git
$ cd bechamel
$ sudo apk add linux-headers
# Add "result" to depends in bechamel.opam
$ opam install . --deps-only --with-test
$ dune build
$ dune runtest
$ dune exec -- ./_build/default/examples/list.exe
$ dune exec -- ./_build/default/examples/fact.exe

~/cactus$ dune build 
File "src/stats.ml", line 78, characters 36-52:
78 |             let point = add_span |> Mtime.Span.to_us |> Float.log in
                                         ^^^^^^^^^^^^^^^^
Error: Unbound value Mtime.Span.to_us
File "bench/encoding/encoding.ml", line 54, characters 18-35:
54 |       ~short_hash:short_hash_staged H.of_raw_string H.to_raw_string
                       ^^^^^^^^^^^^^^^^^
Error: This expression has type (?seed:int -> t -> int) Repr__Type.staged
       but an expression was expected of type ?seed:int -> t -> int
File "src/recorder.ml", line 57, characters 63-64:
57 |         let _, size = decode_int32 (really_input_string in_ 4) 0 in
                                                                    ^
Error: This expression has type int but an expression was expected of type
         int ref
File "bench/log.ml", line 23, characters 42-58:  
23 |     let dt = Mtime_clock.count counter |> Mtime.Span.to_ms in
                                               ^^^^^^^^^^^^^^^^
Error: Unbound value Mtime.Span.to_ms
File "tests/log.ml", line 23, characters 42-58: 
23 |     let dt = Mtime_clock.count counter |> Mtime.Span.to_ms in
                                               ^^^^^^^^^^^^^^^^
Error: Unbound value Mtime.Span.to_ms
File "tests/common.ml", line 110, characters 42-58:
110 |     let dt = Mtime_clock.count counter |> Mtime.Span.to_ms in
                                                ^^^^^^^^^^^^^^^^
Error: Unbound value Mtime.Span.to_ms

[ERROR] Package conflict!
  * Incompatible packages:
    - conan-unix >= dev
    - (invariant) -> ocaml-options-only-flambda -> ocaml-option-flambda
    You can temporarily relax the switch invariant with `--update-invariant'

Warning 70 [missing-mli]: Cannot find interface file.
(cd _build/default && /home/opam/.opam/5.1/bin/ocamlc.opt -w @1..3@5..28@30..39@43@46..47@49..57@61..62-40 -strict-sequence -strict-formats -short-paths -keep-locs -w A-4-41-44 -warn-error +1..49 -strict-sequence -principal -g -bin-annot -I lib/.cowabloga.objs/byte -I /home/opam/.opam/5.1/lib/angstrom -I /home/opam/.opam/5.1/lib/bigstringaf -I /home/opam/.opam/5.1/lib/cow -I /home/opam/.opam/5.1/lib/cstruct -I /home/opam/.opam/5.1/lib/ezjsonm -I /home/opam/.opam/5.1/lib/hex -I /home/opam/.opam/5.1/lib/jsonm -I /home/opam/.opam/5.1/lib/lwt -I /home/opam/.opam/5.1/lib/magic-mime -I /home/opam/.opam/5.1/lib/omd -I /home/opam/.opam/5.1/lib/re -I /home/opam/.opam/5.1/lib/seq -I /home/opam/.opam/5.1/lib/sexplib0 -I /home/opam/.opam/5.1/lib/stringext -I /home/opam/.opam/5.1/lib/uri -I /home/opam/.opam/5.1/lib/uucp -I /home/opam/.opam/5.1/lib/uunf -I /home/opam/.opam/5.1/lib/uutf -I /home/opam/.opam/5.1/lib/xmlm -intf-suffix .ml -no-alias-deps -opaque -open Cowabloga -o lib/.cowabloga.objs/byte/cowabloga__Blog.cmo -c -impl lib/blog.ml)
File "lib/blog.ml", line 101, characters 14-35:
101 | let to_html ?(sep=default_separator) ~feed ~entries =
                    ^^^^^^^^^^^^^^^^^^^^^
Error (warning 16 [unerasable-optional-argument]): this optional argument cannot be erased.
(cd _build/default && /home/opam/.opam/5.1/bin/ocamlc.opt -w @1..3@5..28@30..39@43@46..47@49..57@61..62-40 -strict-sequence -strict-formats -short-paths -keep-locs -w A-4-41-44 -warn-error +1..49 -strict-sequence -principal -g -bin-annot -I lib/.cowabloga.objs/byte -I /home/opam/.opam/5.1/lib/angstrom -I /home/opam/.opam/5.1/lib/bigstringaf -I /home/opam/.opam/5.1/lib/cow -I /home/opam/.opam/5.1/lib/cstruct -I /home/opam/.opam/5.1/lib/ezjsonm -I /home/opam/.opam/5.1/lib/hex -I /home/opam/.opam/5.1/lib/jsonm -I /home/opam/.opam/5.1/lib/lwt -I /home/opam/.opam/5.1/lib/magic-mime -I /home/opam/.opam/5.1/lib/omd -I /home/opam/.opam/5.1/lib/re -I /home/opam/.opam/5.1/lib/seq -I /home/opam/.opam/5.1/lib/sexplib0 -I /home/opam/.opam/5.1/lib/stringext -I /home/opam/.opam/5.1/lib/uri -I /home/opam/.opam/5.1/lib/uucp -I /home/opam/.opam/5.1/lib/uunf -I /home/opam/.opam/5.1/lib/uutf -I /home/opam/.opam/5.1/lib/xmlm -no-alias-deps -opaque -open Cowabloga -o lib/.cowabloga.objs/byte/cowabloga__Feed.cmo -c -impl lib/feed.ml)
File "lib/feed.ml", line 1:
Warning 70 [missing-mli]: Cannot find interface file.
(cd _build/default && /home/opam/.opam/5.1/bin/ocamlopt.opt -w @1..3@5..28@30..39@43@46..47@49..57@61..62-40 -strict-sequence -strict-formats -short-paths -keep-locs -w A-4-41-44 -warn-error +1..49 -strict-sequence -principal -g -I lib/.cowabloga.objs/byte -I lib/.cowabloga.objs/native -I /home/opam/.opam/5.1/lib/angstrom -I /home/opam/.opam/5.1/lib/bigstringaf -I /home/opam/.opam/5.1/lib/cow -I /home/opam/.opam/5.1/lib/cstruct -I /home/opam/.opam/5.1/lib/ezjsonm -I /home/opam/.opam/5.1/lib/hex -I /home/opam/.opam/5.1/lib/jsonm -I /home/opam/.opam/5.1/lib/lwt -I /home/opam/.opam/5.1/lib/magic-mime -I /home/opam/.opam/5.1/lib/omd -I /home/opam/.opam/5.1/lib/re -I /home/opam/.opam/5.1/lib/seq -I /home/opam/.opam/5.1/lib/sexplib0 -I /home/opam/.opam/5.1/lib/stringext -I /home/opam/.opam/5.1/lib/uri -I /home/opam/.opam/5.1/lib/uucp -I /home/opam/.opam/5.1/lib/uunf -I /home/opam/.opam/5.1/lib/uutf -I /home/opam/.opam/5.1/lib/xmlm -intf-suffix .ml -no-alias-deps -opaque -open Cowabloga -o lib/.cowabloga.objs/native/cowabloga__Blog.cmx -c -impl lib/blog.ml)
File "lib/blog.ml", line 101, characters 14-35:
101 | let to_html ?(sep=default_separator) ~feed ~entries =
                    ^^^^^^^^^^^^^^^^^^^^^
Error (warning 16 [unerasable-optional-argument]): this optional argument cannot be erased.
(cd _build/default && /home/opam/.opam/5.1/bin/ocamlc.opt -w @1..3@5..28@30..39@43@46..47@49..57@61..62-40 -strict-sequence -strict-formats -short-paths -keep-locs -g -bin-annot -I lib_test/.serve.eobjs/byte -I /home/opam/.opam/5.1/lib/angstrom -I /home/opam/.opam/5.1/lib/astring -I /home/opam/.opam/5.1/lib/base64 -I /home/opam/.opam/5.1/lib/bigstringaf -I /home/opam/.opam/5.1/lib/bytes -I /home/opam/.opam/5.1/lib/cohttp -I /home/opam/.opam/5.1/lib/cohttp-lwt -I /home/opam/.opam/5.1/lib/cohttp-lwt-unix -I /home/opam/.opam/5.1/lib/conduit -I /home/opam/.opam/5.1/lib/conduit-lwt -I /home/opam/.opam/5.1/lib/conduit-lwt-unix -I /home/opam/.opam/5.1/lib/cow -I /home/opam/.opam/5.1/lib/cstruct -I /home/opam/.opam/5.1/lib/domain-name -I /home/opam/.opam/5.1/lib/ezjsonm -I /home/opam/.opam/5.1/lib/fmt -I /home/opam/.opam/5.1/lib/hex -I /home/opam/.opam/5.1/lib/ipaddr -I /home/opam/.opam/5.1/lib/ipaddr-sexp -I /home/opam/.opam/5.1/lib/ipaddr/unix -I /home/opam/.opam/5.1/lib/jsonm -I /home/opam/.opam/5.1/lib/logs -I /home/opam/.opam/5.1/lib/lwt -I /home/opam/.opam/5.1/lib/lwt/unix -I /home/opam/.opam/5.1/lib/macaddr -I /home/opam/.opam/5.1/lib/magic-mime -I /home/opam/.opam/5.1/lib/ocaml/threads -I /home/opam/.opam/5.1/lib/ocaml/unix -I /home/opam/.opam/5.1/lib/ocplib-endian -I /home/opam/.opam/5.1/lib/ocplib-endian/bigstring -I /home/opam/.opam/5.1/lib/omd -I /home/opam/.opam/5.1/lib/parsexp -I /home/opam/.opam/5.1/lib/ppx_sexp_conv/runtime-lib -I /home/opam/.opam/5.1/lib/re -I /home/opam/.opam/5.1/lib/seq -I /home/opam/.opam/5.1/lib/sexplib -I /home/opam/.opam/5.1/lib/sexplib0 -I /home/opam/.opam/5.1/lib/stringext -I /home/opam/.opam/5.1/lib/uri -I /home/opam/.opam/5.1/lib/uri-sexp -I /home/opam/.opam/5.1/lib/uri/services -I /home/opam/.opam/5.1/lib/uucp -I /home/opam/.opam/5.1/lib/uunf -I /home/opam/.opam/5.1/lib/uutf -I /home/opam/.opam/5.1/lib/xmlm -I lib/.cowabloga.objs/byte -no-alias-deps -opaque -o lib_test/.serve.eobjs/byte/serve.cmo -c -impl lib_test/serve.ml)
File "lib_test/serve.ml", line 36, characters 12-36:
36 |   let ctx = Cohttp_lwt_unix_net.init () in
                 ^^^^^^^^^^^^^^^^^^^^^^^^
Error: Unbound module Cohttp_lwt_unix_net

"/usr/bin/env" "bash" "-c" "opam exec -- opam-dune-lint" failed with exit status 1
2024-03-13 22:40.54: Job failed: Failed: Build failed

$ git clone https://github.com/mirage/irmin-watcher.git
$ cd irmin-watcher
$ sudo apk add libffi-dev
$ opam install . --deps-only --with-test -y
$ dune build
$ dune test

$ opam install . --deps-only -y
<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> installed conf-pkg-config.3
[ERROR] The compilation of conf-libffi failed at "/usr/bin/pkg-config libffi".
...
File "test/dune", line 3, characters 50-64:
3 |  (libraries alcotest logs.fmt irmin-watcher mtime mtime.clock.os))
                                                      ^^^^^^^^^^^^^^
Error: Library "mtime.clock.os" not found.

File "test/test.ml", line 135, characters 15-31:
135 |       let dt = Mtime.Span.to_us (Mtime_clock.elapsed ()) in
                     ^^^^^^^^^^^^^^^^
Error: Unbound value Mtime.Span.to_us

$ sudo docker run -it alpine:3.19.1 sh

$ apk add --update alpine-sdk build-base curl git bzip2 bash
$ mkdir /usr/dev/ocaml
$ mkdir -p /usr/dev/ocaml/bin /usr/dev/ocaml/lib</pre>
# wget https://raw.githubusercontent.com/avsm/ocaml-devcontainers/main/install-tools.sh
# wget https://raw.githubusercontent.com/avsm/ocaml-devcontainers/main/install-ocaml.sh
# chmod +x *.sh
# /root/install-ocaml.sh 5.1.1

# apk update
# apk add make nano patch build-base \
    bubblewrap rsync git sudo bash \
    mercurial

# wget https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh
# sh install.sh

~ # adduser opam 
Changing password for opam
New password: 
Bad password: too short
Retype password: 
passwd: password for opam changed by root

# visudo

opam ALL=(ALL:ALL) ALL

# ln -sf /bin/bash /bin/sh

# sudo su - opam
$ opam init

$ opam init
No configuration file found, using built-in defaults.
Checking for available remotes: rsync and local, git, mercurial.
  - you won't be able to use darcs repositories unless you install the darcs command on your system.

[ERROR] Sandboxing is not working on your platform alpine:
        "~/.opam/opam-init/hooks/sandbox.sh build sh -c echo SUCCESS >$TMPDIR/opam-sandbox-check-out && cat $TMPDIR/opam-sandbox-check-out; rm -f
        $TMPDIR/opam-sandbox-check-out" exited with code 1
Do you want to disable it?  Note that this will result in less secure package builds, so please ensure that you have some other isolation mechanisms in place (such as
running within a container or virtual machine). [y/N]