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title: "opam 2.0.0 Release Candidate 3 is out!" authors: [ "Raja Boujbel - OCamlPro" {"mailto:raja.boujbel(à)ocamlpro.com"} "Louis Gesbert - OCamlPro" {"mailto:louis.gesbert(à)ocamlpro.com"} ] date: "2018-06-22" --BODY--

We are pleased to announce the release of a third release candidate for opam 2.0.0. This one is expected to be the last before 2.0.0 comes out.

Changes since the 2.0.0~rc2 are, as expected, mostly fixes. We deemed it useful, however, to bring in the following:

  • a new command opam switch link that allows to select a switch to be used in a given directory (particularly convenient if you use the shell hook for automatic opam environment update)
  • a new option opam install --assume-built, that allows to install a package using its normal opam procedure, but for a source repository that has been built by hand. This fills a gap that remained in the local development workflows.

The preview of the opam 2 webpages can be browsed at http://opam.ocaml.org/2.0-preview/ (please report issues here).

Installation instructions (unchanged):

  1. From binaries: run

    sh <(curl -sL https://opam.ocaml.org/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.

  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)

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

Thanks a lot for testing out this new RC and reporting any issues you may find.