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class DirectoryWatcher
# Paths contains helpful methods to determine paths of files inside the
# DirectoryWatcher library
#
module Paths
# The root directory of the project is considered the parent directory of
# the 'lib' directory.
#
# Returns The full expanded path of the parent directory of 'lib' going up
# the path from the current file. Trailing File::SEPARATOR is guaranteed
#
def root_dir
path_parts = ::File.expand_path(__FILE__).split(::File::SEPARATOR)
lib_index = path_parts.rindex("lib")
return path_parts[0...lib_index].join(::File::SEPARATOR) + ::File::SEPARATOR
end
# Return a path relative to the 'lib' directory in this project
#
def lib_path(*args,&block)
sub_path('lib', *args, &block)
end
# Return a path relative to the 'root' directory in the project
#
def path(*args,&block)
sub_path('', *args, &block)
end
# Calculate the full expanded path of the item with respect to a sub path of
# 'root_dir'
#
def sub_path(sub,*args,&block)
rv = ::File.join(root_dir, sub) + ::File::SEPARATOR
rv = ::File.join(rv, *args) if args
if block
with_load_path( rv ) do
rv = block.call
end
end
return rv
end
# Execute a block in the context of a path added to $LOAD_PATH
#
def with_load_path(path, &block)
$LOAD_PATH.unshift path
block.call
ensure
$LOAD_PATH.shift
end
extend self
end
end
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