Install ruby via rbenv in Mac os big sur

gistfile1.txt

brew install openssl readline

# edit .zshrc

# Setup Compiler paths for readline and openssl
local READLINE_PATH=$(brew --prefix readline)
local OPENSSL_PATH=$(brew --prefix openssl)
export LDFLAGS="-L$READLINE_PATH/lib -L$OPENSSL_PATH/lib"
export CPPFLAGS="-I$READLINE_PATH/include -I$OPENSSL_PATH/include"
export PKG_CONFIG_PATH="$READLINE_PATH/lib/pkgconfig:$OPENSSL_PATH/lib/pkgconfig"

# Use the OpenSSL from Homebrew instead of ruby-build
# Note: the Homebrew version gets updated, the ruby-build version doesn't
export RUBY_CONFIGURE_OPTS="--with-openssl-dir=$OPENSSL_PATH"

# Place openssl@1.1 at the beginning of your PATH (preempt system libs)
export PATH=$OPENSSL_PATH/bin:$PATH

# Load rbenv
eval "$(rbenv init -)"

# Extract the latest version of Ruby so you can do this:
# rbenv install $LATEST_RUBY_VERSION
export LATEST_RUBY_VERSION=$(rbenv install -l | grep -v - | tail -1)



rm -rf ~/.gem
rbenv install 2.7.2