Create opam conf-file for povray

[fccm2]

just runs which povray to check if it's installed on the system

[jmid]

Thanks! 🙏

I can see povray is also available on

• Arch (in the extra repo though), Fedora, FreeBSD, OpenSuse https://pkgs.org/search/?q=povray and
• on macOS w/homebrew https://formulae.brew.sh/formula/povray

just runs which povray to check if it's installed on the system

This in turn depends on which which may not be available, say on Windows.

Instead the consensus seems to be to run the command directly with a suitable option (say --version) if such a thing exists (I don't think it does from a quick skim of https://manpages.debian.org/experimental/povray/povray.1.en.html however), or test with the POSIX compatible command -v <program-name>. For more details see #18452.

[fccm2]

Indeed it is not mentioned in the man page, but the option exists. (this option is mentioned when we do -help)
Let's switch to it then.

[shonfeder]

Looks like the build recipe on freebsd does not work out of the box:

https://opam.ci.ocaml.org/github/ocaml/opam-repository/commit/92e1b8bba18da3cbba88037f7ff174d78c001f64/variant/freebsd,freebsd-14.2-ocaml-4.14-amd64,conf-povray.1

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[ERROR] The compilation of conf-povray.1 failed at "sh -c povray --version".

#=== ERROR while compiling conf-povray.1 ======================================#
# context              2.3.0 | freebsd/x86_64 | ocaml-base-compiler.4.14.2 | pinned
# path                 ~/.opam/4.14.2/.opam-switch/build/conf-povray.1
# command              /bin/sh -c povray --version
# exit-code            127
# env-file             ~/.opam/log/conf-povray-75267-a06ff4.env
# output-file          ~/.opam/log/conf-povray-75267-a06ff4.out
### output ###
# /bin/sh: povray: not found

Any ideas what may be needed here?

[jmid]

Any ideas what may be needed here?

Yep, the binary is named differently. See my latest change suggestion above.

[shonfeder]

Thanks @jmid !