lib/ignore: Replace lib/fnmatch with github.com/gobwas/glob

Because it's literally ten times faster:



	benchmark                  old ns/op     new ns/op     delta

	BenchmarkMatch-8           13842         1200          -91.33%

	BenchmarkMatchCached-8     139           147           +5.76%



	benchmark                  old allocs     new allocs     delta

	BenchmarkMatch-8           0              0              +0.00%

	BenchmarkMatchCached-8     0              0              +0.00%



	benchmark                  old bytes     new bytes     delta

	BenchmarkMatch-8           12            0             -100.00%

	BenchmarkMatchCached-8     0             0             +0.00%

vendor/github.com/gobwas/glob/cmd/globdraw/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/gobwas/glob"
+	"github.com/gobwas/glob/match"
+	"github.com/gobwas/glob/match/debug"
+	"os"
+	"strings"
+	"unicode/utf8"
+)
+
+func main() {
+	pattern := flag.String("p", "", "pattern to draw")
+	sep := flag.String("s", "", "comma separated list of separators characters")
+	flag.Parse()
+
+	if *pattern == "" {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	var separators []rune
+	if len(*sep) > 0 {
+		for _, c := range strings.Split(*sep, ",") {
+			if r, w := utf8.DecodeRuneInString(c); len(c) > w {
+				fmt.Println("only single charactered separators are allowed")
+				os.Exit(1)
+			} else {
+				separators = append(separators, r)
+			}
+		}
+	}
+
+	glob, err := glob.Compile(*pattern, separators...)
+	if err != nil {
+		fmt.Println("could not compile pattern:", err)
+		os.Exit(1)
+	}
+
+	matcher := glob.(match.Matcher)
+	fmt.Fprint(os.Stdout, debug.Graphviz(*pattern, matcher))
+}

vendor/github.com/gobwas/glob/cmd/globtest/main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/gobwas/glob"
+	"os"
+	"strings"
+	"testing"
+	"unicode/utf8"
+)
+
+func benchString(r testing.BenchmarkResult) string {
+	nsop := r.NsPerOp()
+	ns := fmt.Sprintf("%10d ns/op", nsop)
+	allocs := "0"
+	if r.N > 0 {
+		if nsop < 100 {
+			// The format specifiers here make sure that
+			// the ones digits line up for all three possible formats.
+			if nsop < 10 {
+				ns = fmt.Sprintf("%13.2f ns/op", float64(r.T.Nanoseconds())/float64(r.N))
+			} else {
+				ns = fmt.Sprintf("%12.1f ns/op", float64(r.T.Nanoseconds())/float64(r.N))
+			}
+		}
+
+		allocs = fmt.Sprintf("%d", r.MemAllocs/uint64(r.N))
+	}
+
+	return fmt.Sprintf("%8d\t%s\t%s allocs", r.N, ns, allocs)
+}
+
+func main() {
+	pattern := flag.String("p", "", "pattern to draw")
+	sep := flag.String("s", "", "comma separated list of separators")
+	fixture := flag.String("f", "", "fixture")
+	verbose := flag.Bool("v", false, "verbose")
+	flag.Parse()
+
+	if *pattern == "" {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	var separators []rune
+	for _, c := range strings.Split(*sep, ",") {
+		if r, w := utf8.DecodeRuneInString(c); len(c) > w {
+			fmt.Println("only single charactered separators are allowed")
+			os.Exit(1)
+		} else {
+			separators = append(separators, r)
+		}
+	}
+
+	g, err := glob.Compile(*pattern, separators...)
+	if err != nil {
+		fmt.Println("could not compile pattern:", err)
+		os.Exit(1)
+	}
+
+	if !*verbose {
+		fmt.Println(g.Match(*fixture))
+		return
+	}
+
+	fmt.Printf("result: %t\n", g.Match(*fixture))
+
+	cb := testing.Benchmark(func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			glob.Compile(*pattern, separators...)
+		}
+	})
+	fmt.Println("compile:", benchString(cb))
+
+	mb := testing.Benchmark(func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			g.Match(*fixture)
+		}
+	})
+	fmt.Println("match:    ", benchString(mb))
+}