dbuenzli

> opam switch create 4.06.0 --debug-level=3 
00:00.003  GSTATE                 LOAD-GLOBAL-STATE @ /Users/dbuenzli/.opam
00:00.004  SYSTEM                 LOCK /Users/dbuenzli/.opam/lock (none => read)
00:00.004  SYSTEM                 LOCK /Users/dbuenzli/.opam/config.lock (none => write)
00:00.004  FILE(config)           Read ~/.opam/config in 0.000s
00:00.005  RSTATE                 LOAD-REPOSITORY-STATE @ /Users/dbuenzli/.opam
00:00.008  FILE(repos-config)     Read ~/.opam/repo/repos-config in 0.003s
00:00.008  SYSTEM                 LOCK /Users/dbuenzli/.opam/repo/state.cache (none => read)
00:00.108  RSTATE                 Loaded /Users/dbuenzli/.opam/repo/state.cache in 0.099s
00:00.264  SYSTEM                 LOCK /Users/dbuenzli/.opam/repo/state.cache (read => none)

dbuenzli

echo 'true : package(landmarks.ppx,landmarks)' >> _tags
export OCAML_LANDMARK=auto
topkg build 

topkg run exe

dbuenzli

Deprecation procedure for OCaml

In order to deprecate a feature from the OCaml system the following steps are taken:

1. Introduce a workaround for the deprecation (if needed). Document the workaround, see below.
2. When Debian stable has the version in which the workaround was introduced, start deprecating the feature with a visible warning

dbuenzli

(*
ocamlfind ocamlopt -o readmeta -linkpkg \
  -package dynlink,compiler-libs.optcomp,compiler-libs.bytecomp readmeta.ml
*)

let read_cma ic =
  let lib =
    let toc_pos = input_binary_int ic in
    seek_in ic toc_pos;
    (input_value ic : Cmo_format.library)

dbuenzli

# aspcud /Users/dbuenzli/tmp/opam-1.2.0-beta2/$in /Users/dbuenzli/tmp/opam-1.2.0-beta2/$out -count(removed),-notuptodate(request),-count(down),-count(changed)
preamble: 
property: pinned: bool = [false], installed-root: bool = [false], reinstall: bool = [false], opam-version: string, opam-name: string

package: herelib
version: 3
depends: ocamlfind , camlp4
conflicts: herelib
opam-name: herelib
opam-version: 109.10.00

dbuenzli

(*----------------------------------------------------------------------------
   Copyright (c) 2009, Daniel C. Bünzli. All rights reserved.
   Distributed under a BSD license, see license at the end of the file.
  ----------------------------------------------------------------------------*)

let str = Printf.sprintf 
let exec = Filename.basename Sys.executable_name
let pr = Format.printf
let pr_err s = Printf.eprintf "%s:%s\n" exec s

dbuenzli

opam-version: "2.0"
synopsis: "Build setenv"
maintainer: "Daniel Bünzli <daniel.buenzl i@erratique.ch>"
setenv: [[BLA += "BLA"]]
authors:[]
build:[[ "env" ]]

dbuenzli

opam-version: "2.0"
synopsis: "Build environment"
maintainer: "Daniel Bünzli <daniel.buenzl i@erratique.ch>"
authors:[]
build:[[ "env" ]]

dbuenzli

# Download vagrant box for Windows 10 from:
#
#   https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/
#
# Unzip and add with:
#
#   vagrant box add --name win10 MSEdge\ -\ Win10.box
#
# During the first `vagrant up` need to connect to vm UI to do this:
#

dbuenzli

Switch creation and initialization in opam v2.

The first point for me is that we should as much as possible get to a system where the following basic sequences of steps are possible.

opam switch create bla               # Create switch
opam install non-ocaml-pkg           # Doesn't depend on ocaml
opam install ocaml.V.VV.V+variant

or