quand j'essaye "sudo gem install rubocop", j'obtiens ...
Building native extensions. This could take a while...
ERROR: Error installing rubocop:
ERROR: Failed to build gem native extension.
current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.1/ext
/usr/bin/ruby2.3 mkrf_conf.rb
current directory: /var/lib/gems/2.3.0/gems/rainbow-2.2.1/ext
/usr/bin/ruby2.3 -rubygems /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake RUBYARCHDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.1 RUBYLIBDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.1
/usr/bin/ruby2.3: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake (LoadError)
rake failed, exit code 1
Gem files will remain installed in /var/lib/gems/2.3.0/gems/rainbow-2.2.1 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/rainbow-2.2.1/gem_make.out
J'ai donc essayé un certain nombre de solutions, en particulier celles de /programming/22544754/failed-to-build-gem-native-extension-installing-compass (gemme différente, même erreur)
J'ai essayé de réinstaller RVM avec "rvm uninstall --disable-binary 2.2.0", ce qui a pris du temps mais je ne l'ai pas résolu
ensuite j'ai essayé $ "sudo apt-get install ruby-dev" qui donne
Reading package lists... Done
Building dependency tree
Reading state information... Done
ruby-dev is already the newest version (1:2.3.0+1).
The following packages were automatically installed and are no longer required:
dkms linux-headers-4.4.0-53 linux-headers-4.4.0-53-generic
linux-image-4.4.0-53-generic linux-image-extra-4.4.0-53-generic
python-appindicator python-gconf python-gi python-glade2
python-gobject python-pexpect python-ptyprocess python-xdg
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 40 not upgraded.
J'ai aussi essayé "gem update --system" auquel j'arrive ...
Latest version currently installed. Aborting.
Toutes les suggestions seront grandement appréciées car je suis un noob total et je suis coincé.
rake
installé?