path_join.pp
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path_join.pp
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	# @summary Take one or more paths and join them together using the os specific separator.
	# Because in how windows uses a different separator this function
	# will format a windows path into a equilivent unix like path. This type of unix like
	# path will work on windows.
	#
	# @param dirs Joins two or more directories by file separator.
	# @return [Stdlib::Absolutepath] The joined path
	# @example Joining Unix paths to return `/tmp/test/libs`
	# extlib::path_join('/tmp', 'test', 'libs')
	# @example Joining Windows paths to return `/c/test/libs`
	# extlib::path_join('c:', 'test', 'libs')
	function extlib::path_join(Array[String] $dirs) >> Stdlib::Absolutepath {
	$unix_sep = '/'
	$sep_regex = /\/\|\\/
	$first_value = $dirs[0]
	# when first value is absolute path, append all other elements
	# by breaking the path into pieces first, then joining
	if $first_value =~ Stdlib::Absolutepath {
	$fixed_dirs = $first_value.split($sep_regex) + $dirs.delete($first_value)
	} else {
	$fixed_dirs = $dirs
	}
	$no_empty_dirs = $fixed_dirs.filter \|$dir\| { !empty($dir) }
	$dirs_without_sep = $no_empty_dirs.map \|String $dir \| {
	# remove : and file separator
	$dir.regsubst($sep_regex, '').regsubst(':', '')
	}
	join([$unix_sep,$dirs_without_sep.join($unix_sep)])
	}