Correct way to setup and use custom mirror

[0llirocks]

Hello,

we would like to use a internal mirror to download ruby.

We did a proxy for https://cache.ruby-lang.org/pub/ruby/ but that url does not accept a hash. How can we still use it as mirror?

Let's assume our mirror url is https://cache-pub-ruby/.

RUBY_BUILD_MIRROR_URL

RUBY_BUILD_MIRROR_URL=https://cache-pub-ruby/ rbenv install --verbose 3.3.9

tries https://cache-pub-ruby/d1991690a4e17233ec6b3c7844c1e1245c0adce3e00d713551d0458467b727b1

curl -q -fL -o ruby-3.3.9.tar.gz https://cache-pub-ruby/d1991690a4e17233ec6b3c7844c1e1245c0adce3e00d713551d0458467b727b1

doesn't work since the url does not accept any hash.

RUBY_BUILD_MIRROR_PACKAGE_URL

RUBY_BUILD_MIRROR_PACKAGE_URL=https://cache-pub-ruby/ rbenv install --verbose 3.3.9

tries https://cache-pub-ruby/

curl -q -fL -o ruby-3.3.9.tar.gz https://cache-pub-ruby/

tries to directly download the package without specifying the version.

I also noted that http_head_curl returns 400 for my mirror, meaning it never uses any of the provided urls and will always use the original url. I removed the http head part (https://github.com/rbenv/ruby-build/blob/master/bin/ruby-build#L506) locally to check what url it then will try to get.

I guess the easiest solution would be to mirror an endpoint that accepts the hash but I couldn't find it on https://cache.ruby-lang.org/.

My workaround now is to execute

curl -q -fL -o "$(rbenv root)/cache/ruby-3.3.9.tar.gz" https://cache-pub-ruby/3.3/ruby-3.3.9.tar.gz

How can is setup my mirror correctly?

[0llirocks]

While searching for a solution I noticed there is already is PR #1793 for that, sorry that I missed that.