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require 'sprockets/path_utils'
module Sprockets
# Internal: used to "expand" and "compress" values for storage
class URITar
attr_reader :scheme, :root, :path
# Internal: Initialize object for compression or expansion
#
# uri - A String containing URI that may or may not contain the scheme
# env - The current "environment" that assets are being loaded into.
def initialize(uri, env)
@root = env.root
@env = env
uri = uri.to_s
if uri.include?("://".freeze)
@scheme, _, @path = uri.partition("://".freeze)
@scheme << "://".freeze
else
@scheme = "".freeze
@path = uri
end
end
# Internal: Converts full uri to a "compressed" uri
#
# If a uri is inside of an environment's root it will
# be shortened to be a relative path.
#
# If a uri is outside of the environment's root the original
# uri will be returned.
#
# Returns String
def compress
scheme + compressed_path
end
# Internal: Tells us if we are using an absolute path
#
# Nix* systems start with a `/` like /Users/schneems.
# Windows systems start with a drive letter than colon and slash
# like C:/Schneems.
def absolute_path?
PathUtils.absolute_path?(path)
end
# Internal: Convert a "compressed" uri to an absolute path
#
# If a uri is inside of the environment's root it will not
# start with a slash for example:
#
# file://this/is/a/relative/path
#
# If a uri is outside the root, it will start with a slash:
#
# file:///This/is/an/absolute/path
#
# Returns String
def expand
if absolute_path?
# Stored path was absolute, don't add root
scheme + path
else
if scheme.empty?
File.join(root, path)
else
# We always want to return an absolute uri,
# make sure the path starts with a slash.
scheme + File.join("/".freeze, root, path)
end
end
end
# Internal: Returns "compressed" path
#
# If the input uri is relative to the environment root
# it will return a path relative to the environment root.
# Otherwise an absolute path will be returned.
#
# Only path information is returned, and not scheme.
#
# Returns String
def compressed_path
# windows
if !@root.start_with?("/".freeze) && path.start_with?("/".freeze)
consistent_root = "/".freeze + @root
else
consistent_root = @root
end
if compressed_path = PathUtils.split_subpath(consistent_root, path)
compressed_path
else
path
end
end
end
end
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