downgrading the gem coffee-script-source' from 1.9.1 to 1.8.0

问题

I am getting this error: ExecJS::ProgramError in Welcome#indexExecJS::ProgramError in Welcome#index.

According to others posts that happend because there is a problem with coffee-script-source 1.9.0/1 running on windows so I have to downgrade the gem with the command line: gem 'coffee-script-source', '1.8.0'. when I try to do this i get this error:

ERROR: While executing gem ... (Gem::CommandLineError) Unknown command coffee-script-source,

What I am doing wrong?

回答1:

Put this line in your gemfile:

gem 'coffee-script-source', '1.8.0'

And then run bundle install.

回答2:

As cd-rum said "Put this line in your gemfile:

gem 'coffee-script-source', '1.8.0'"

and actually run 'bundle update'

回答3:

I had that issue and I wanted to put a more detailed solution on how to do it and some context to solve this issue: ExecJS::ProgramError in Welcome#indexExecJS::ProgramError in Welcome#index

Changing coffee script's version in the Gemfile

Add in blog/GemFile the coffee-script-source v1.8.0 (v1.9.0+ does not work on Windows)

#For Windows it works with CofferScript v1.8
gem 'coffee-script-source', '1.8.0'

Then Stop the server (if it was running) and do:

bundle update coffee-script-source

It should now be working fine.

回答4:

ERROR: ExecJS::ProgramError in Docs#show

<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %> <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %> this 2 line code create the problem.this code situated in layouts=>application.html.erb.

Solve:

For Windows it works with CofferScript v1.8

gem 'coffee-script-source', '1.8.0'

Added this code in Gemfile, and then write in the command line "bundle update coffee-script-source".

https://rubygems.org/gems/coffee-script-source/versions/1.8.0

来源：https://stackoverflow.com/questions/29954935/downgrading-the-gem-coffee-script-source-from-1-9-1-to-1-8-0