glob/readme.md

glob.go

Go Globbing Library.

Install

    go get github.com/gobwas/glob

Example

package main

import "github.com/gobwas/glob"

func main() {
    var g glob.Glob
    
    // create simple glob
    g = glob.MustCompile("*.github.com")
    g.Match("api.github.com") // true
    
    // create new glob with set of delimiters as ["."]
    g = glob.MustCompile("api.*.com", ".")
    g.Match("api.github.com") // true
    g.Match("api.gi.hub.com") // false
    
    // create new glob with set of delimiters as ["."]
    // but now with super wildcard
    g = glob.MustCompile("api.**.com", ".")
    g.Match("api.github.com") // true
    g.Match("api.gi.hub.com") // true
        
    // create glob with single symbol wildcard
    g = glob.MustCompile("?at")
    g.Match("cat") // true
    g.Match("fat") // true
    g.Match("at") // false
    
    // create glob with single symbol wildcard and delimiters ["f"]
    g = glob.MustCompile("?at", "f")
    g.Match("cat") // true
    g.Match("fat") // false
    g.Match("at") // false 
    
    // create glob with character-list matchers 
    g = glob.MustCompile("[abc]at")
    g.Match("cat") // true
    g.Match("bat") // true
    g.Match("fat") // false
    g.Match("at") // false
    
    // create glob with character-list matchers 
    g = glob.MustCompile("[!abc]at")
    g.Match("cat") // false
    g.Match("bat") // false
    g.Match("fat") // true
    g.Match("at") // false 
    
    // create glob with character-range matchers 
    g = glob.MustCompile("[a-c]at")
    g.Match("cat") // true
    g.Match("bat") // true
    g.Match("fat") // false
    g.Match("at") // false
    
    // create glob with character-range matchers 
    g = glob.MustCompile("[!a-c]at")
    g.Match("cat") // false
    g.Match("bat") // false
    g.Match("fat") // true
    g.Match("at") // false 
    
    
    // create glob with pattern-alternatives list 
    g = glob.MustCompile("{cat,bat,[fr]at}")
    g.Match("cat") // true
    g.Match("bat") // true
    g.Match("fat") // true
    g.Match("rat") // true
    g.Match("at") // false 
    g.Match("zat") // false 
}

Performance

This library is created for compile-once patterns. This means, that compilation could take time, but strings matching is done faster, than in case when always parsing template.

If you will not use compiled glob.Glob object, and do g := glob.MustCompile(pattern); g.Match(...) every time, then your code will be much more slower.

Run go test -bench=. from source root to see the benchmarks:

Pattern	Fixture	Operations	Speed (ns/op)
[a-z][!a-x]*cat*[h][!b]*eyes*	my cat has very bright eyes	2000000	527
https://*.google.*	https://account.google.com	10000000	121
{https://*.google.*,*yandex.*,*yahoo.*,*mail.ru}	http://yahoo.com	10000000	167
{https://*gobwas.com,http://exclude.gobwas.com}	https://safe.gobwas.com	50000000	24.7
abc*	abcdef	200000000	9.49
*def	abcdef	200000000	9.60
ab*ef	abcdef	100000000	15.2

The same things with regexp package:

Pattern	Fixture	Operations	Speed (ns/op)
^[a-z][^a-x].*cat.*[h][^b].*eyes.*$	my cat has very bright eyes	500000	2553
^https:\/\/.*\.google\..*$	https://account.google.com	1000000	1205
`^(https://..google..	.yandex..	.yahoo..	.*mail.ru)$`
`^(https://.*gobwas.com	http://exclude.gobwas.com)$`	https://safe.gobwas.com	1000000
^abc.*$	abcdef	3000000	275
^.*def$	abcdef	5000000	464
^ab.*ef$	abcdef	5000000	395

Syntax

Syntax is inspired by standard wildcards, except that ** is aka super-asterisk, that do not sensitive for separators.