path

Documentation

Overview

Package path implements utility routines for manipulating slash-separated filename paths.

Index

• Variables
• func Base(path string) string
• func Clean(path string) string
• func Ext(path string) string
• func IsAbs(path string) bool
• func Join(elem ...string) string
• func Match(pattern, name string) (matched bool, err os.Error)
• func Split(path string) (dir, file string)

Variables

var ErrBadPattern = os.NewError("syntax error in pattern")

Functions

func Base

func Base(path string) string

Base returns the last element of path. Trailing slashes are removed before extracting the last element. If the path is empty, Base returns ".". If the path consists entirely of slashes, Base returns "/".

func Clean

func Clean(path string) string

Clean returns the shortest path name equivalent to path by purely lexical processing. It applies the following rules iteratively until no further processing can be done:

1. Replace multiple slashes with a single slash.
2. Eliminate each . path name element (the current directory).
3. Eliminate each inner .. path name element (the parent directory) along with the non-.. element that precedes it.
4. Eliminate .. elements that begin a rooted path: that is, replace "/.." by "/" at the beginning of a path.

If the result of this process is an empty string, Clean returns the string ".".

See also Rob Pike, “Lexical File Names in Plan 9 or Getting Dot-Dot right,” http://plan9.bell-labs.com/sys/doc/lexnames.html

func Ext

func Ext(path string) string

Ext returns the file name extension used by path. The extension is the suffix beginning at the final dot in the final slash-separated element of path; it is empty if there is no dot.

func IsAbs

func IsAbs(path string) bool

IsAbs returns true if the path is absolute.

func Join

func Join(elem ...string) string

Join joins any number of path elements into a single path, adding a separating slash if necessary. All empty strings are ignored.

func Match

func Match(pattern, name string) (matched bool, err os.Error)

Match returns true if name matches the shell file name pattern. The pattern syntax is:

pattern:
	{ term }
term:
	'*'         matches any sequence of non-/ characters
	'?'         matches any single non-/ character
	'[' [ '^' ] { character-range } ']'
	            character class (must be non-empty)
	c           matches character c (c != '*', '?', '\\', '[')
	'\\' c      matches character c

character-range:
	c           matches character c (c != '\\', '-', ']')
	'\\' c      matches character c
	lo '-' hi   matches character c for lo <= c <= hi

Match requires pattern to match all of name, not just a substring. The only possible error return is when pattern is malformed.

func Split

func Split(path string) (dir, file string)

Split splits path immediately following the final path separator, separating it into a directory and file name component. If there is no separator in path, Split returns an empty dir and file set to path.