60 lines
1.6 KiB
Ruby
60 lines
1.6 KiB
Ruby
module Jekyll
|
|
module External
|
|
class << self
|
|
#
|
|
# Gems that, if installed, should be loaded.
|
|
# Usually contain subcommands.
|
|
#
|
|
def blessed_gems
|
|
%w(
|
|
jekyll-docs
|
|
jekyll-import
|
|
)
|
|
end
|
|
|
|
#
|
|
# Require a gem or file if it's present, otherwise silently fail.
|
|
#
|
|
# names - a string gem name or array of gem names
|
|
#
|
|
def require_if_present(names)
|
|
Array(names).each do |name|
|
|
begin
|
|
require name
|
|
rescue LoadError
|
|
Jekyll.logger.debug "Couldn't load #{name}. Skipping."
|
|
yield(name) if block_given?
|
|
false
|
|
end
|
|
end
|
|
end
|
|
|
|
#
|
|
# Require a gem or gems. If it's not present, show a very nice error
|
|
# message that explains everything and is much more helpful than the
|
|
# normal LoadError.
|
|
#
|
|
# names - a string gem name or array of gem names
|
|
#
|
|
def require_with_graceful_fail(names)
|
|
Array(names).each do |name|
|
|
begin
|
|
Jekyll.logger.debug "Requiring:", name.to_s
|
|
require name
|
|
rescue LoadError => e
|
|
Jekyll.logger.error "Dependency Error:", <<-MSG
|
|
Yikes! It looks like you don't have #{name} or one of its dependencies installed.
|
|
In order to use Jekyll as currently configured, you'll need to install this gem.
|
|
|
|
The full error message from Ruby is: '#{e.message}'
|
|
|
|
If you run into trouble, you can find helpful resources at https://jekyllrb.com/help/!
|
|
MSG
|
|
raise Jekyll::Errors::MissingDependencyException, name
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|