How to install ruby locally via rbenv/ruby-build?

Question

I require installing ruby without internet access . As ruby-build docs suggest I can change the mirror URL via specifying the environment variable RUBY_BUILD_MIRROR_URL . I did this and although it looks at my local repo for ruby it still attempts to connect to online repo to install yaml .

env RUBY_BUILD_MIRROR_URL=http://10.10.161.39/platforms/common/ruby-2.0.0-p247.tar.gz#3e71042872c77726409460e8647a2f304083a15ae0defe90d8000a69917e20d3 /opt/rbenv/bin/rbenv install 2.0.0-p247
Downloading yaml-0.1.6.tar.gz...
-> http://10.152.161.39/platforms/proteus/common/ruby-2.0.0-p247.tar.gz#3e71042872c77726409460e8647a2f304083a15ae0defe90d8000a69917e20d3/7da6971b4bd08a986dd2a61353bc422362bd0edcc67d7ebaac68c95f74182749
-> http://pyyaml.org/download/libyaml/yaml-0.1.6.tar.gz
error: failed to download yaml-0.1.6.tar.gz

BUILD FAILED (RedHatEnterpriseServer 5.10 using ruby-build 20150928)

I tried placing the yaml-0.1.6.tar.gz file in my local repo however that makes no difference besides it will fail since the sha2 checksum provided in the URL is for ruby-2.0.0-p247.tar.gz file.

How can install ruby offline with rbenv ?

Update 1

I discovered that you can modify the lookup config file to point to a local mirror instead. ie: /opt/rbenv/plugins/ruby-build/share/ruby-build/2.0.0-p247

install_package "yaml-0.1.6" "http://10.10.161.39/platforms/common/yaml-0.1.6.tar.gz#7da6971b4bd08a986dd2a61353bc422362bd0edcc67d7ebaac68c95f74182749"  --if needs_yaml
install_package "openssl-1.0.1p" "ttp://10.10.161.39/platforms/common/openssl-1.0.1p.tar.gz#bd5ee6803165c0fb60bbecbacacf244f1f90d2aa0d71353af610c29121e9b2f1" mac_openssl --if has_broken_mac_openssl
install_package "ruby-2.0.0-p247"  "http://10.10.161.39/platforms/common/ruby-2.0.0-p247.tar.gz#3e71042872c77726409460e8647a2f304083a15ae0defe90d8000a69917e20d3"

Is there a better way or is this is the best way forward?

Answer 1

So here's how I got it to work:

Update the contents of the download file in /opt/rbenv/plugins/ruby-build/share/ruby-build/<ruby-version> to point to your local repo.

You will also notice how each file has a long hash valued after the '#' symbol in the URL. For Example:

install_package "yaml-0.1.6" "http://10.10.161.39/platforms/common/yaml-0.1.6.tar.gz#7da6971b4bd08a986dd2a61353bc422362bd0edcc67d7ebaac68c95f74182749" --if needs_yaml

This hash value is the sha256sum the file which rbenv will use to validate if it is the expected file.

So you will need to generate the value by running sha256sum <filename> and appending to each file in the URL path.

Complete example below:

install_package "yaml-0.1.6" "http://10.10.161.39/platforms/common/yaml-0.1.6.tar.gz#7da6971b4bd08a986dd2a61353bc422362bd0edcc67d7ebaac68c95f74182749"  --if needs_yaml
install_package "openssl-1.0.1p" "ttp://10.10.161.39/platforms/common/openssl-1.0.1p.tar.gz#bd5ee6803165c0fb60bbecbacacf244f1f90d2aa0d71353af610c29121e9b2f1" mac_openssl --if has_broken_mac_openssl
install_package "ruby-2.0.0-p247"  "http://10.10.161.39/platforms/common/ruby-2.0.0-p247.tar.gz#3e71042872c77726409460e8647a2f304083a15ae0defe90d8000a69917e20d3"

In the example above we have a dedicated repository server at http://10.10.161.39/platforms/common . If your packages are locally available, you will need to point to the local path and verify if it works.