We are pleased to announce the release of opam 2.0.2.

As sandbox scripts have been updated, don't forget to run opam init --reinit -ni to update yours.

This new version contains mainly backported fixes:

  • Doc:
    • update man page
    • add message for deprecated options
    • reinsert removed ones to print a deprecated message instead of fail (e.g. --alias-of)
    • deprecate no-aspcud
  • Pin:
    • on pinning, rebuild updated pin-depends packages reliably
    • include descr & url files on pinning 1.2 opam files
  • Sandbox:
    • handle symlinks in bubblewrap for system directories such as /bin or /lib (#3661). Fixes sandboxing on some distributions such as CentOS 7 and Arch Linux.
    • allow use of unix domain sockets on macOS (#3659)
    • change one-line conditional to if statement which was incompatible with set -e
    • make /var readonly instead of empty and rw
  • Path: resolve default opam root path
  • System: suffix .out for read_command_output stdout files
  • Locked: check consistency with opam file when reading lock file to suggest regeneration message
  • Show: remove pin depends messages
  • Cudf: Fix closure computation in the presence of cycles to have a complete graph if a cycle is present in the graph (typically ocaml-base-compilerocaml)
  • List: Fix some cases of listing coinstallable packages
  • Format upgrade: extract archived source files of version-pinned packages
  • Core: add is_archive in OpamSystem and OpamFilename
  • Init: don't fail if empty compiler given
  • Lint: fix light_uninstall flag for error 52
  • Build: partial port to dune
  • Update cold compiler to 4.07.1

Installation instructions (unchanged):

  1. From binaries: run

    sh <(curl -sL https://raw.githubusercontent.com/ocaml/opam/master/shell/install.sh)

    or download manually from the Github "Releases" page to your PATH. In this case, don't forget to run opam init --reinit -ni to enable sandboxing if you had version 2.0.0~rc manually installed or to update your sandbox script.

  2. From source, using opam:

    opam update; opam install opam-devel

    (then copy the opam binary to your PATH as explained, and don't forget to run opam init --reinit -ni to enable sandboxing if you had version 2.0.0~rc manually installed or to update you sandbox script)

  3. From source, manually: see the instructions in the README.

We hope you enjoy this new minor version, and remain open to bug reports and suggestions.

NOTE: this article is cross-posted on opam.ocaml.org and ocamlpro.com. Please head to the latter for the comments!