lib/roadie/filesystem_provider.rb
# frozen_string_literal: true
module Roadie
# Asset provider that looks for files on your local filesystem.
#
# It will be locked to a specific path and it will not access files above
# that directory.
class FilesystemProvider
# Raised when FilesystemProvider is asked to access a file that lies above
# the base path.
class InsecurePathError < Error; end
attr_reader :path
def initialize(path = Dir.pwd)
@path = path
end
# @return [Stylesheet, nil]
def find_stylesheet(name)
file_path = build_file_path(name)
if File.exist? file_path
Stylesheet.new file_path, File.read(file_path)
end
end
# @raise InsecurePathError
# @return [Stylesheet]
def find_stylesheet!(name)
file_path = build_file_path(name)
if File.exist? file_path
Stylesheet.new file_path, File.read(file_path)
else
basename = File.basename file_path
raise CssNotFound.new(
css_name: basename,
message: %{#{file_path} does not exist. (Original name was "#{name}")},
provider: self
)
end
end
def to_s
inspect
end
def inspect
"#<#{self.class} #{@path}>"
end
private
def build_file_path(name)
raise InsecurePathError, name if name.include?("..")
File.join(@path, name[/^([^?]+)/])
end
end
end