CODEWITHSUNDEEP
rubymacososx-lionhomebrew
Alexey Zakharov
Alexey Zakharov

Reputation: 25120

How can I switch to ruby 1.9.3 installed using Homebrew?

I have installed ruby 1.9.3 using hombrew

brew install ruby

But default 1.8.7 is still used. How can I switch osx to use 1.9.3 as default ruby?

Upvotes: 110

Views: 159240

Answers (11)

Cay
Cay

Reputation: 1

In my case, brew link --overwrite ruby -f doesn't work, it can NOT overwrite all links(maybe quite shouldn't).

If you take a look at the output of that command:

Warning: Refusing to link macOS provided/shadowed software: ruby
If you need to have ruby first in your PATH, run:
    echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshrc

For compilers to find ruby you may need to set:
    export LDFLAGS="-L/usr/local/opt/ruby/lib"
    export CPPFLAGS="-I/usr/local/opt/ruby/include"

For pkg-config to find ruby you may need to set:
    export PKG_CONFIG_PATH="/usr/local/opt/ruby/lib/pkgconfig"

just adjust the precedence as above answers say, and more if you use zsh I suggest that run this command instead:

    echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshenv

To intergrate with gcc or g++, clang and so on, just set the LDFLAGS and CPPFLAGS in your ~/.zshenv too.

Upvotes: 0

Waqas Mustafa
Waqas Mustafa

Reputation: 377

brew install ruby

This will install the latest version of ruby, now you want to set it as default use for example in my case:

echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshrc

then run

source ~/.zshrc

this will set it as default in the profile

now you can check the version of ruby

ruby -v

Upvotes: 6

Johannes Nyman
Johannes Nyman

Reputation: 51

After seeing Craig Wayne's answer I thought maybe I had missed a warning when installing ruby with Homebrew. So I reinstalled it with brew reinstall [email protected] and there it was:

==> Caveats
By default, binaries installed by gem will be placed into:
  /usr/local/lib/ruby/gems/2.7.0/bin

You may want to add this to your PATH.

[email protected] is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.

If you need to have [email protected] first in your PATH, run:
  echo 'export PATH="/usr/local/opt/[email protected]/bin:$PATH"' >> ~/.zshrc

For compilers to find [email protected] you may need to set:
  export LDFLAGS="-L/usr/local/opt/[email protected]/lib"
  export CPPFLAGS="-I/usr/local/opt/[email protected]/include"

For pkg-config to find [email protected] you may need to set:
  export PKG_CONFIG_PATH="/usr/local/opt/[email protected]/lib/pkgconfig"

So the solution for me was adding /usr/local/opt/[email protected]/bin: to the beginning of PATH in ~/.zshrc.

Upvotes: 0

Chau Pham
Chau Pham

Reputation: 5100

Ruby was installed by Homebrew at /usr/local/opt/ruby. So, we need to add this path to bash or Zsh.

# Type this to find out which shell you're using (e.g., bash, Zsh)
echo $SHELL

# If you're using Bash (e.g., echo $SHELL returns /bin/bash)
echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.bash_profile

# If you're using Zsh
echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshrc

Then, source the file

# E.g., if you're using bash
source ~/.bash_profile

Finally, verify ruby's version

ruby -v

Upvotes: 11

Richard Lin
Richard Lin

Reputation: 41

SHORT: Do note what you want to change it for.

If you're on OS X and trying to use Ruby for something like Jekyll, then don't use homebrew because that's what Apple is using for Ruby for and it might not be good to use if you're not sure what you're doing. Instead, use rbenv or RVM.

LESS SHORT: I was trying to switch from the default version to an updated version (from 2.0) to use Jekyll because it required Ruby version 2.2.5 and above. I updated it and version 2.5 was installed, but when I checked "ruby -v", it was still 2.0. Once I finally got around to changing the default version, I wasn't able to install the package I needed because I didn't have write permission. For example, if you come across something like this, then you probably are having the same problem

$ gem install jekyll bundler
ERROR:  While executing gem ... (Gem::FilePermissionError)    
    You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.

Upvotes: 4

Craig Wayne
Craig Wayne

Reputation: 5068

SHORT ANSWER:

after installing ruby via homebrew just do this:

brew link --overwrite ruby

and restart or reopen your Terminal  

LONG ANSWER

So I did a normal install of ruby using homebrew

brew install ruby

that installed fine BUT it was still using the system's default ruby. which I verified by doing:

which ruby 
#/usr/bin/ruby

So as per Matthew Rudy's suggestion, I checked the order of my /etc/paths, and all was good.

Then I decided to do:

which -a ruby
#/usr/bin/ruby
#usr/local/bin/ruby

so nothing was broken as such. tried to reinstall ruby again using the homebrew method, and then i found it.

Homebrew mentioned:

Warning: ruby-2.3.1 already installed, it's just not linked

so had to do:

brew link --overwrite ruby

Upvotes: 129

Robert
Robert

Reputation: 281

In OSX you can change the path using:

sudo nano /etc/paths

And then add a path or change the order.

Upvotes: 0

Andrii Chernenko
Andrii Chernenko

Reputation: 10204

I had similar situation. I installed ruby using Homebrew. which -a ruby gave me the following output: 

#usr/local/bin/ruby
#/usr/bin/ruby

Which means that newly installed version should have been used, but ruby --version still returned the old system version.

I quit terminal (Cmd+Q), and after restart ruby --version returned the correct version. So make sure you restart terminal after installing before trying any other (potentially unnecessary) fixes.

Upvotes: 10

Bn Mk
Bn Mk

Reputation: 164

Just as an alternative approach for anyone else looking for an answer to this - you can set an alias in your .bash_profile e.g 

ruby="/usr/local/bin/ruby"

this is how i got around the issue

Upvotes: -2

Matthew Rudy
Matthew Rudy

Reputation: 16844

I suggest you take a look at rvm. You can then set it as default with rvm use 1.9.3 --default

But if you are happy with your homebrew install.

Then just change the precedence of directories in the PATH

Here is my /etc/paths

# homebrews should always take precedence
/usr/local/bin

# the default stack
/usr/bin
/bin
/usr/sbin
/sbin

This is important generally for homebrew, else the system version of git, ruby, pg_admin,... will all be used instead of the brew version.

if you say which -a ruby you'll see all the installed rubies, and the precedence in the PATH

eg.

$ which -a ruby
/Users/matthew/.rvm/rubies/ruby-1.9.3-p0/bin/ruby
/Users/matthew/.rvm/bin/ruby
/usr/bin/ruby

UPDATE: I now don't think you should change /etc/paths

Instead you need to check which of .profile, .bashrc, or .bash_login is being loaded in your shell, and just add /usr/local/bin to your path.

For me, I only have a .profile. You can create that file if none of those files already exist in your home directory.

# homebrews should always take precedence
export PATH=/usr/local/bin:$PATH

Upvotes: 96

Francis Kim
Francis Kim

Reputation: 4285

If you'd like to use homebrew to install 1.9.3, you can follow these steps:

$ brew update
$ brew install rbenv
$ brew install ruby-build

Once you have rbenv and ruby-build installed, you can run the following command to get Ruby 1.9.3 installed.

$ rbenv install 1.9.3-p125

Now if you’d like to use 1.9.3 by default, you can run the following command:

$ rbenv global 1.9.3-p125

Upvotes: 49

Related Questions