ruby cheat sheet

ruby cheat sheet

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# https://www.ruby-lang.org/en/documentation/installation/
============================================================================
$ sudo snap install ruby --classic
$ sudo apt-get install ruby-full
$ sudo yum install ruby
$ sudo pacman -S ruby
$ pkg install ruby

$ brew install ruby
> choco install ruby
> winget install Ruby
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# Building from Source Operating System: Ubuntu 16.04.5 LTS
$ whoami
vagrant
wget https://cache.ruby-lang.org/pub/ruby/2.5/ruby-2.5.1.tar.gz
tar xvfz ruby-2.5.1.tar.gz
sudo ./configure
sudo make
sudo make install
$ ruby -v
ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-linux]
============================================================================
# Building from Source Operating System: Ubuntu 16.04.5 LTS

wget -q https://cache.ruby-lang.org/pub/ruby/2.7/ruby-2.7.0.tar.gz
tar xvfz ruby-2.7.0.tar.gz
cd ruby-2.7.0 && sudo ./configure && sudo make && sudo make install
============================================================================
# Install Ruby Version Manager (RVM) Operating System: CentOS Linux 7 (Core)

gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
$ gpg2 -k
/home/vagrant/.gnupg/pubring.gpg
--------------------------------
pub   4096R/D39DC0E3 2014-10-28
uid                  Michal Papis (RVM signing) <[email protected]>
uid                  Michal Papis <[email protected]>
uid                  [jpeg image of size 5015]
sub   2048R/C71866D7 2015-11-02
sub   4096R/BF04FF17 2014-10-28 [expires: 2022-03-12]

pub   4096R/39499BDB 2016-11-11
uid                  Piotr Kuczynski <[email protected]>
sub   4096R/6521FF17 2016-11-

============================================================================
# Install Ruby Version Manager (RVM) Operating System: Ubuntu 16.04.5 LTS
     
$ sudo apt-get install gnupg2 -y
$ sudo gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
gpg: directory '/home/vagrant/.gnupg' created
gpg: new configuration file '/home/vagrant/.gnupg/dirmngr.conf' created
gpg: new configuration file '/home/vagrant/.gnupg/gpg.conf' created
gpg: keybox '/home/vagrant/.gnupg/pubring.kbx' created
gpg: /home/vagrant/.gnupg/trustdb.gpg: trustdb created
gpg: key 39499BDB: public key "Piotr Kuczynski <[email protected]>" imported
gpg: key D39DC0E3: public key "Michal Papis (RVM signing) <[email protected]>" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 2
gpg:               imported: 2

$ sudo gpg2 -k
/home/vagrant/.gnupg/pubring.kbx
--------------------------------
pub   rsa4096/39499BDB 2016-11-11 [SC]
uid         [ unknown] Piotr Kuczynski <[email protected]>
sub   rsa4096/6521FF17 2016-11-11 [E]

pub   rsa4096/D39DC0E3 2014-10-28 [SC]
uid         [ unknown] Michal Papis (RVM signing) <[email protected]>
uid         [ unknown] Michal Papis <[email protected]>
uid         [ unknown] [jpeg image of size 5015]
sub   rsa2048/C71866D7 2015-11-02 [E]
sub   rsa4096/BF04FF17 2014-10-28 [S] [expires: 2022-03-12]

$ \curl -sSL https://get.rvm.io | sudo bash -s stable #The Multi-User install instructions must be prefixed with the sudo command
Downloading https://github.com/rvm/rvm/archive/1.29.9.tar.gz
Downloading https://github.com/rvm/rvm/releases/download/1.29.9/1.29.9.tar.gz.asc
gpg: Signature made Wed 10 Jul 2019 08:31:02 AM UTC using RSA key ID 39499BDB
gpg: Good signature from "Piotr Kuczynski <[email protected]>" [unknown]
gpg: WARNING: This key is not certified with a trusted signature!
gpg:          There is no indication that the signature belongs to the owner.
Primary key fingerprint: 7D2B AF1C F37B 13E2 069D  6956 105B D0E7 3949 9BDB
GPG verified '/usr/local/rvm/archives/rvm-1.29.9.tgz'
Creating group 'rvm'
Installing RVM to /usr/local/rvm/
Installation of RVM in /usr/local/rvm/ is almost complete:

  * First you need to add all users that will be using rvm to 'rvm' group,
    and logout - login again, anyone using rvm will be operating with `umask u=rwx,g=rwx,o=rx`.

  * To start using RVM you need to run `source /etc/profile.d/rvm.sh`
    in all your open shell windows, in rare cases you need to reopen all shell windows.
  * Please do NOT forget to add your users to the rvm group.
     The installer no longer auto-adds root or users to the rvm group. Admins must do this.
     Also, please note that group memberships are ONLY evaluated at login time.
     This means that users must log out then back in before group membership takes effect!
Thanks for installing RVM 🙏
Please consider donating to our open collective to help us maintain RVM.

👉  Donate: https://opencollective.com/rvm/donate

\curl -sSL https://get.rvm.io | bash -s -- --version latest #Installing a specific version
\curl -sSL https://get.rvm.io | bash -s -- --branch [owner/][repo]
\curl -sSL https://get.rvm.io | bash -s -- --trace #Debugging installation process
============================================================================
$ irb
irb(main):001:0> exit
============================================================================
(shell logout necessary)
$ type rvm | head -1
$ rvm list known #List known rubies
$ rvm get stable #Update RVM
$ rvm get head #Update RVM In case of problems try first with development version
$ rvm requirements #Install Ruby dependencies
$ rvm install 1.9.3  #Install Ruby
$ sudo rvm list # List rubies only
$ sudo rvm list gemsets # List rubies and gemsets
$ sudo rvm gemset list # List gemsets for current ruby
$ sudo gem list --local
    
rvm system                 # For system ruby, with fallback to default 
rvm use jruby              # For current session only
rvm use --default 1.9.3    # For current and new sessions
rvm use --ruby-version rbx # For current session and this project

rvm 1.8.7 do gem install rspec # Temporarily selecting another Ruby or gemset in the given ruby
rvm 1.8.7,1.9.2 do gem install haml # Temporarily selecting another Ruby or gemset in this two rubies
rvm @global do gem install gist  # Temporarily selecting another Ruby or gemset in @global gemset of current ruby

gem install rspec

Working with gemsets:
    rvm use 1.8.7                          # use the ruby to manage gemsets for
    rvm gemset create project_name         # create a gemset
    rvm gemset use project_name            # use a gemset in this ruby
    rvm gemset list                        # list gemsets in this ruby
    rvm gemset delete project_name         # delete a gemset
    rvm 1.9.1@other_project_name           # use another ruby and gemset
    rvm 1.9.3@_project --create --rvmrc    # use and create gemset & .rvmrc
============================================================================
#Install ruby from source 
sudo zypper install gcc make
wget https://cache.ruby-lang.org/pub/ruby/2.5/ruby-2.5.1.tar.gz
tar xvfz rubygems-2.7.6.tgz 
cd rubygems-2.7.6/
./configure
make
sudo make install
ruby -v

============================================================================
# Install ruby on ubuntu 18.04 (via rbenv package manager)
# Install rbenv and Dependencies
sudo apt install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev -y
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
#add ~/.rbenv/bin to your $PATH so that you can use rbenv's command line utility.
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
# adding ~/.rbenv/bin/rbenv init to your ~/.basrc file will let you load rbenv automatically
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
exec $SHELL (or source ~/.bashrc)
type rbenv
# ruby-build is a command-line utility that makes it easy to install virtually any version of Ruby, from source
# It is available as a plugin for rbenv that provides the rbenv install command, or as a standalone program
# As an rbenv plugin
mkdir -p "$(rbenv root)"/plugins
git clone https://github.com/rbenv/ruby-build.git "$(rbenv root)"/plugins/ruby-build
rbenv version
rbenv versions
# Installing Ruby with ruby-build
rbenv install 2.5.3
# set it as default version of Ruby
rbenv global 2.5.3
ruby -v
#turn off local documentation generation by creating a file called ~/.gemrc
echo "gem: --no-document" > ~/.gemrc
# Bundler is a tool that manages gem dependencies for projects.
gem install bundler
gem env home
# Updating rbenv
cd ~/.rbenv
git pull
# Uninstalling Ruby versions
rbenv uninstall 2.5.3
# Uninstalling rbenv
vi ~/.bashrc
# remove the following two lines
export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
# remove rbenv and all installed Ruby versions with this command:
rm -rf `rbenv root`

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#Install rubygems
wget https://rubygems.org/rubygems/rubygems-2.7.6.tgz
tar xvfz rubygems-2.7.6.tgz 
cd rubygems-2.7.6/
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# Make your own gem, https://rubygems.org
git clone https://github.com/qrush/hola.git
rake -T
rake test
rake
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gem --version
bundler version
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