ruby-build | Compile and install Ruby

If you look at the final layer on the image here, it looks like there is an ENTRYPOINT ["/usr/local/bin/docker-entrypoint"]. The Dockerfile you've linked might not be the one used to build the image.

You can use the stand alone version of ruby-build. Note that you are root and not shalev inside the container:

Ruby 2.0.0 is very much past its end of life, so I'm assuming you have a specific reason you need install it. Otherwise, you are much better off installing a modern, supported version such as 2.7.x or 3.0.x.

Older versions of ruby were built with openssl@1.0. After 1.0 went end of life, ruby-build had a breaking change to require openssl@1.1. This means that ruby versions < 2.4 can no longer be installed/built directly using ruby-build (i.e., rbenv). This GitHub issue has details.

Homebrew has removed its openssl@1.0 formula, but you can still install it via an rbenv tap. The following might work for you, though the comments in the issue report mixed results depending on the version of Command Line Tools being used.

It seems that you have configured bundler (a gem version manager for Ruby projects) to install the gems for Redmine in a different location from the usual system gems, namely to /opt/redmine/vendor/cache.

As such, the usual gem commands will not touch those bundler-installed gems since gem does not know about them. To re-install all bundler managed gems, you can instead run the following command within your Redmine directory (i/e/ the directory containing the Gemfile:

This issue got solved after doing the following:

• Delete bootsnap cache:

  rm -rf tmp/cache/bootsnap*

This might have solved the issue, but I did also:

• Use ruby 2.7.3
• bundle update bootsnap simplecov Installing bootsnap 1.7.5 (was 1.7.2)

This is not an official solution. I'm sure the rbenv devs are working on an actual solution but this workaround should help others who are setting up their ruby environments on the new M1 chips for Mac.

• Make sure your Terminal is using Rosetta. You can find how to do that using Google.

• Uninstall your current rbenv following these instructions Removing rbenv. Be sure you also remove all the downloaded versions of ruby if you have any (minus the system default) located in /Users//.rbenv/versions/.

• Uninstall the ARM version of Homebrew with: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall.sh)"

• Install the x86_64 version of Homebrew with: arch -x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

• If you run brew install rbenv should produce output saying "Error: Cannot install in Homebrew on ARM processor in Intel default prefix (/usr/local)!". This is expected.

• You want to tell brew to install the older architecture x86_64 arch -x86_64 brew install rbenv

• Then finally install the version you want using arch -x86_64 rbenv install x.x.x (x = some number i.e. 2.7.2)

From there you just need to remember to tell brew arch -x86_64 when installing other versions of Ruby.

Once an actual fix comes through you'll be able to switch back to the newer architecture and not have to use the arch argument. You also don't have to do this all the time with brew either, just rbenv.

Next things I would try:

• Running bundle exec rails c instead.
• Check what which openssl returns, that may indicate that you have different versions installed (mine shows /usr/bin/openssl)
• Make sure you are doing all operations from the repository directory.

your error is error: no acceptable C compiler found in $PATH

Run sudo apt-get install build-essential to install the C compiler.

you can see that its included in Step 1 – Install rbenv and Dependencies of the tutorial your following alongside other libraries rbenv needs

I don't know how you got rbenv to end up in /bin/rbenv and usr/bin/rbenv, but for what I can see from their installation guide you only need ~/.rbenv/bin/rbenv.

Assuming you use bash, I think these are all added to your $PATH in ~/.bashrc. You should find something like: