feat: add Gopkg manifests, move fixtures to testdata, add vendor dependencies

vendor/github.com/tj/go-debug/debug.go

@@ -0,0 +1,128 @@
+package debug
+
+import (
+	"fmt"
+	"io"
+	"math/rand"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	writer  io.Writer = os.Stderr
+	reg     *regexp.Regexp
+	m       sync.Mutex
+	enabled = false
+)
+
+// Debugger function.
+type DebugFunction func(string, ...interface{})
+
+// Terminal colors used at random.
+var colors []string = []string{
+	"31",
+	"32",
+	"33",
+	"34",
+	"35",
+	"36",
+}
+
+// Initialize with DEBUG environment variable.
+func init() {
+	env := os.Getenv("DEBUG")
+
+	if "" != env {
+		Enable(env)
+	}
+}
+
+// SetWriter replaces the default of os.Stderr with `w`.
+func SetWriter(w io.Writer) {
+	m.Lock()
+	defer m.Unlock()
+	writer = w
+}
+
+// Disable all pattern matching. This function is thread-safe.
+func Disable() {
+	m.Lock()
+	defer m.Unlock()
+	enabled = false
+}
+
+// Enable the given debug `pattern`. Patterns take a glob-like form,
+// for example if you wanted to enable everything, just use "*", or
+// if you had a library named mongodb you could use "mongodb:connection",
+// or "mongodb:*". Multiple matches can be made with a comma, for
+// example "mongo*,redis*".
+//
+// This function is thread-safe.
+func Enable(pattern string) {
+	m.Lock()
+	defer m.Unlock()
+	pattern = regexp.QuoteMeta(pattern)
+	pattern = strings.Replace(pattern, "\\*", ".*?", -1)
+	pattern = strings.Replace(pattern, ",", "|", -1)
+	pattern = "^(" + pattern + ")$"
+	reg = regexp.MustCompile(pattern)
+	enabled = true
+}
+
+// Debug creates a debug function for `name` which you call
+// with printf-style arguments in your application or library.
+func Debug(name string) DebugFunction {
+	prevGlobal := time.Now()
+	color := colors[rand.Intn(len(colors))]
+	prev := time.Now()
+
+	return func(format string, args ...interface{}) {
+		if !enabled {
+			return
+		}
+
+		if !reg.MatchString(name) {
+			return
+		}
+
+		d := deltas(prevGlobal, prev, color)
+		fmt.Fprintf(writer, d+" \033["+color+"m"+name+"\033[0m - "+format+"\n", args...)
+		prevGlobal = time.Now()
+		prev = time.Now()
+	}
+}
+
+// Return formatting for deltas.
+func deltas(prevGlobal, prev time.Time, color string) string {
+	now := time.Now()
+	global := now.Sub(prevGlobal).Nanoseconds()
+	delta := now.Sub(prev).Nanoseconds()
+	ts := now.UTC().Format("15:04:05.000")
+	deltas := fmt.Sprintf("%s %-6s \033["+color+"m%-6s", ts, humanizeNano(global), humanizeNano(delta))
+	return deltas
+}
+
+// Humanize nanoseconds to a string.
+func humanizeNano(n int64) string {
+	var suffix string
+
+	switch {
+	case n > 1e9:
+		n /= 1e9
+		suffix = "s"
+	case n > 1e6:
+		n /= 1e6
+		suffix = "ms"
+	case n > 1e3:
+		n /= 1e3
+		suffix = "us"
+	default:
+		suffix = "ns"
+	}
+
+	return strconv.Itoa(int(n)) + suffix
+}