ERROR:pi_piper requires RubyGems version >= 2.0.0.

[Damaotimlin]

Hi Folks,

I'm facing an error while I do sudo gem install pi_piper

It return an error blow :

ERROR: Error installing pi_piper: pi_piper requires RubyGems version >= 2.0.0. Try 'gem update --system' to update RubyGems itself.

I use rvm and below is my ruby -v and gem -v and do tried 'gem update --system' but still failed.

My ruby and gem is up to date:

pi@cvproto01:~/pi-piper $ which ruby /home/pi/.rvm/rubies/ruby-2.2.1/bin/ruby pi@cvproto01:~/pi-piper $ ruby -v ruby 2.2.1p85 (2015-02-26 revision 49769) [armv7l-linux-eabihf] pi@cvproto01:~/pi-piper $ which gem /home/pi/.rvm/rubies/ruby-2.2.1/bin/gem pi@cvproto01:~/pi-piper $ gem -v 2.6.1

I did follow the instruction and install libssl-dev

And, I tried to install gem without sudo gem install pi_piper Guess what, it is successfully installed ?!

Successfully installed pi_piper-2.0.0 1 gem installed

I was thinking I'm so smart to do no 'sudo'. But the story always comes with HOWEVER However, I ran my ruby code, it returns: 'sudo ruby pi-piper-practice.rb'

pi-piper-practice.rb:1:in `require': no such file to load -- pi_piper (LoadError) from pi-piper-practice.rb:1

The pi-piper-practice.rb code listed below:

require 'pi_piper' include PiPiper

Examples

Example 1 - Simple switch

puts "Press the switch to get start" PiPiper.watch :pin => 17, :invert => true do |pin| puts "Pin changed from #{pin.last_value} to #{pin.value}" end

PiPiper.wait

I couldn't know what I am missing now. Please helps and thanks in advance !!!!!!

[elmatou]

rvmsudo should do the trick.

rvm requires you install gems in "user space" meaning no sudo. but pi_piper works (for now) only with root permission, meaning sudo.

rvmsudo or rbenv sudo depending on your ruby install allows you to run with root permission gems installed in "user space"

[Damaotimlin]

Hi @elmatou,

Thanks for your reply!

'rvmsudo' it works fine. Gem installed! rvmsudo gem install pi_piper

Warning: can not check /etc/sudoers for secure_path, falling back to call via /usr/bin/env, this breaks rules from /etc/sudoers. Run:

export rvmsudo_secure_path=1

to avoid the warning, put it in shell initialization file to make it persistent.

In case there is no secure_path in /etc/sudoers. Run:

export rvmsudo_secure_path=0

to avoid the warning, put it in shell initialization file to make it persistent. Successfully installed pi_piper-2.0.0 Parsing documentation for pi_piper-2.0.0 Installing ri documentation for pi_piper-2.0.0 Done installing documentation for pi_piper after 8 seconds 1 gem installed

However, when I run the practice again sudo ruby pi-piper-practice.rb It still return me

pi-piper-practice.rb:1:in `require': no such file to load -- pi_piper (LoadError) from pi-piper-practice.rb:1

How to check if I installed the pi_piper correctly ?

Thank you again for help me collect the puzzles!

[Damaotimlin]

Hi @elmatou,

I just found out two things and problem solved !

One is run rmvsudo gem install pi_piper

and run ruby file by

rvmsudo ruby ~.rb

All done, thanks !

[elmatou]

nice. but I don't think you need rvmsudo for installing the gem, only for running script.

[Damaotimlin]

Hi @elmatou

Thanks for your kindly helps!