opam 2.1.1 • OCaml Changelog

Feedback on this post is welcomed on Discuss!

We are pleased to announce the release of opam 2.1.1.

With opam 2.1.1, if you export OPAMCLI=2.0 into your environment then workflows expecting opam 2.0 should now behave even more equivalently.

opam 2.1.1 includes both the fixes in opam 2.0.10.

General fixes:

Restore support for switch creation with "positional" package arguments and --packages option for CLI version 2.0, e.g. OPAMCLI=2.0 opam switch create . 4.12.0+options --packages=ocaml-option-flambda. In opam 2.1 and later, this syntax remains an error (#4843)
Fix opam switch set-invariant: default repositories were loaded instead of the switch's repositories selection (#4869)
Run the sandbox check in a temporary directory (#4783)

Integrated depext support has a few updates:

Homebrew now has support for casks and full-names (#4800)
Archlinux now handles virtual package detection (#4833, partially addressing #4759)
Disable the detection of available packages on RHEL-based distributions. This fixes an issue on RHEL-based distributions where yum list used to detect available and installed packages would wait for user input without showing any output and/or fail in some cases (#4791)

And finally two regressions have been dealt with:

Regression: avoid calling Unix.environment on load (as a toplevel expression). This regression affected opam's libraries, rather than the binary itself (#4789)
Regression: handle empty environment variable updates (#4840)

A few issues with the compilation of opam from sources have been fixed as well (e.g. mingw-w64 with g++ 11.2 now works)

Opam installation instructions (unchanged):

From binaries: run
```
bash -c "sh <(curl -fsSL https://opam.ocaml.org/install.sh) --version 2.1.1"
```
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 you sandbox script.
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 your sandbox script)
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.

See full changelog

Fix typo in error message for opam var [#4786 @kit-ty-kate - fix #4785]
Run the sandbox check in the temporary directory [#4787 @dra27 - fix #4783]
OpamSystem: avoid calling Unix.environment at top level [#4789 @hannesm]
Homebrew: Add support for casks and full-names [#4801 @kit-ty-kate]
Fix the cold target in presence of an older OCaml compiler version on macOS [#4802 @kit-ty-kate - fix #4801]
Archlinux: handle virtual package detection [#4833 @rjbou - partial fix #4759]
Disable the detection of available packages on RHEL-based distributions. This fixes an issue on RHEL-based distributions where yum list used to detect available and installed packages would wait for user input without showing any output and/or fail in some cases [#4791 @kit-ty-kate - fixes #4790]
Handle empty environment variable updates - missed cherry-pick from 2.0 [#4840 @dra27]
Fix vendored build on mingw-w64 with g++ 11.2 [#4835 @dra27]
Put back support for switch creation with packages argument and --packages option with cli 2.0, and a specific error message for cli 2.1 [#4853 @rjbou - fix #4843]
Fix reverting environment additions to PATH-like variables when several dirs added at once [#4861 @dra27]
Fix dose3 download url since gforge is gone [#4870 @avsm]
Ensure setenv can use package variables defined during the build [#4841 @dra27]
Fix `set-invariant: default repos were loaded instead of switch repos [#4866 @rjbou]