opam 2.0.4 release

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We are pleased to announce the release of opam 2.0.4.

This new version contains some backported fixes:

• Sandboxing on macOS: considering the possibility that TMPDIR is unset [#3597 @herbelin - fix #3576]
• display: Fix opam config var display, aligned on opam config list [#3723 @rjbou - rel. #3717]
• pin:
  • update source of (version) pinned directory [#3726 @rjbou - #3651]
  • fix --ignore-pin-depends with autopin [#3736 @AltGr]
  • fix pinnings not installing/upgrading already pinned packages (introduced in 2.0.2) [#3800 @AltGr]
• opam clean: Ignore errors trying to remove directories [#3732 @kit-ty-kate]
• remove wrong "mismatched extra-files" warning [#3744 @rjbou]
• urls: fix hg opam 1.2 url parsing [#3754 @rjbou]
• lint: update message of warning 47, to avoid confusion because of missing synopsis field internally inferred from descr [#3753 @rjbou - fix #3738]
• system:
  • lock & signals: don't interrupt at non terminal signals [#3541 @rjbou]
  • shell: fix fish manpath setting [#3728 @gregory-nisbet]
  • git: use diff.noprefix=false config argument to overwrite user defined configuration [#3788 @rjbou, #3628 @Blaisorblade - fix #3627]
• dirtrack: fix precise tracking mode [#3796 @rjbou]
• fix some mispellings [#3731 @MisterDA]
• CI enhancement & fixes [#3706 @dra27, #3748 @rjbou, #3801 @rjbou]

Note: To homogenise macOS name on system detection, we decided to keep macos, and convert darwin to macos in opam. For the moment, to not break jobs & CIs, we keep uploading darwin & macos binaries, but from the 2.1.0 release, only macos ones will be kept.

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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 you 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.

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• We provide audit, support, custom developer tools and training for both the most modern languages, such as Rust, Wasm and OCaml, and for legacy languages, such as COBOL or even home-made domain-specific languages;
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