add go-plugin deps to vendor

vendor/github.com/hashicorp/go-hclog/int.go

@@ -0,0 +1,397 @@
+package hclog
+
+import (
+	"bufio"
+	"encoding"
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+var (
+	_levelToBracket = map[Level]string{
+		Debug: "[DEBUG]",
+		Trace: "[TRACE]",
+		Info:  "[INFO ]",
+		Warn:  "[WARN ]",
+		Error: "[ERROR]",
+	}
+)
+
+// Given the options (nil for defaults), create a new Logger
+func New(opts *LoggerOptions) Logger {
+	if opts == nil {
+		opts = &LoggerOptions{}
+	}
+
+	output := opts.Output
+	if output == nil {
+		output = os.Stderr
+	}
+
+	level := opts.Level
+	if level == NoLevel {
+		level = DefaultLevel
+	}
+
+	return &intLogger{
+		m:      new(sync.Mutex),
+		json:   opts.JSONFormat,
+		caller: opts.IncludeLocation,
+		name:   opts.Name,
+		w:      bufio.NewWriter(output),
+		level:  level,
+	}
+}
+
+// The internal logger implementation. Internal in that it is defined entirely
+// by this package.
+type intLogger struct {
+	json   bool
+	caller bool
+	name   string
+
+	// this is a pointer so that it's shared by any derived loggers, since
+	// those derived loggers share the bufio.Writer as well.
+	m     *sync.Mutex
+	w     *bufio.Writer
+	level Level
+
+	implied []interface{}
+}
+
+// Make sure that intLogger is a Logger
+var _ Logger = &intLogger{}
+
+// The time format to use for logging. This is a version of RFC3339 that
+// contains millisecond precision
+const TimeFormat = "2006-01-02T15:04:05.000Z0700"
+
+// Log a message and a set of key/value pairs if the given level is at
+// or more severe that the threshold configured in the Logger.
+func (z *intLogger) Log(level Level, msg string, args ...interface{}) {
+	if level < z.level {
+		return
+	}
+
+	t := time.Now()
+
+	z.m.Lock()
+	defer z.m.Unlock()
+
+	if z.json {
+		z.logJson(t, level, msg, args...)
+	} else {
+		z.log(t, level, msg, args...)
+	}
+
+	z.w.Flush()
+}
+
+// Cleanup a path by returning the last 2 segments of the path only.
+func trimCallerPath(path string) string {
+	// lovely borrowed from zap
+	// nb. To make sure we trim the path correctly on Windows too, we
+	// counter-intuitively need to use '/' and *not* os.PathSeparator here,
+	// because the path given originates from Go stdlib, specifically
+	// runtime.Caller() which (as of Mar/17) returns forward slashes even on
+	// Windows.
+	//
+	// See https://github.com/golang/go/issues/3335
+	// and https://github.com/golang/go/issues/18151
+	//
+	// for discussion on the issue on Go side.
+	//
+
+	// Find the last separator.
+	//
+	idx := strings.LastIndexByte(path, '/')
+	if idx == -1 {
+		return path
+	}
+
+	// Find the penultimate separator.
+	idx = strings.LastIndexByte(path[:idx], '/')
+	if idx == -1 {
+		return path
+	}
+
+	return path[idx+1:]
+}
+
+// Non-JSON logging format function
+func (z *intLogger) log(t time.Time, level Level, msg string, args ...interface{}) {
+	z.w.WriteString(t.Format(TimeFormat))
+	z.w.WriteByte(' ')
+
+	s, ok := _levelToBracket[level]
+	if ok {
+		z.w.WriteString(s)
+	} else {
+		z.w.WriteString("[UNKN ]")
+	}
+
+	if z.caller {
+		if _, file, line, ok := runtime.Caller(3); ok {
+			z.w.WriteByte(' ')
+			z.w.WriteString(trimCallerPath(file))
+			z.w.WriteByte(':')
+			z.w.WriteString(strconv.Itoa(line))
+			z.w.WriteByte(':')
+		}
+	}
+
+	z.w.WriteByte(' ')
+
+	if z.name != "" {
+		z.w.WriteString(z.name)
+		z.w.WriteString(": ")
+	}
+
+	z.w.WriteString(msg)
+
+	args = append(z.implied, args...)
+
+	var stacktrace CapturedStacktrace
+
+	if args != nil && len(args) > 0 {
+		if len(args)%2 != 0 {
+			cs, ok := args[len(args)-1].(CapturedStacktrace)
+			if ok {
+				args = args[:len(args)-1]
+				stacktrace = cs
+			} else {
+				args = append(args, "<unknown>")
+			}
+		}
+
+		z.w.WriteByte(':')
+
+	FOR:
+		for i := 0; i < len(args); i = i + 2 {
+			var val string
+
+			switch st := args[i+1].(type) {
+			case string:
+				val = st
+			case int:
+				val = strconv.FormatInt(int64(st), 10)
+			case int64:
+				val = strconv.FormatInt(int64(st), 10)
+			case int32:
+				val = strconv.FormatInt(int64(st), 10)
+			case int16:
+				val = strconv.FormatInt(int64(st), 10)
+			case int8:
+				val = strconv.FormatInt(int64(st), 10)
+			case uint:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint64:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint32:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint16:
+				val = strconv.FormatUint(uint64(st), 10)
+			case uint8:
+				val = strconv.FormatUint(uint64(st), 10)
+			case CapturedStacktrace:
+				stacktrace = st
+				continue FOR
+			default:
+				val = fmt.Sprintf("%v", st)
+			}
+
+			z.w.WriteByte(' ')
+			z.w.WriteString(args[i].(string))
+			z.w.WriteByte('=')
+
+			if strings.ContainsAny(val, " \t\n\r") {
+				z.w.WriteByte('"')
+				z.w.WriteString(val)
+				z.w.WriteByte('"')
+			} else {
+				z.w.WriteString(val)
+			}
+		}
+	}
+
+	z.w.WriteString("\n")
+
+	if stacktrace != "" {
+		z.w.WriteString(string(stacktrace))
+	}
+}
+
+// JSON logging function
+func (z *intLogger) logJson(t time.Time, level Level, msg string, args ...interface{}) {
+	vals := map[string]interface{}{
+		"@message":   msg,
+		"@timestamp": t.Format("2006-01-02T15:04:05.000000Z07:00"),
+	}
+
+	var levelStr string
+	switch level {
+	case Error:
+		levelStr = "error"
+	case Warn:
+		levelStr = "warn"
+	case Info:
+		levelStr = "info"
+	case Debug:
+		levelStr = "debug"
+	case Trace:
+		levelStr = "trace"
+	default:
+		levelStr = "all"
+	}
+
+	vals["@level"] = levelStr
+
+	if z.name != "" {
+		vals["@module"] = z.name
+	}
+
+	if z.caller {
+		if _, file, line, ok := runtime.Caller(3); ok {
+			vals["@caller"] = fmt.Sprintf("%s:%d", file, line)
+		}
+	}
+
+	if args != nil && len(args) > 0 {
+		if len(args)%2 != 0 {
+			cs, ok := args[len(args)-1].(CapturedStacktrace)
+			if ok {
+				args = args[:len(args)-1]
+				vals["stacktrace"] = cs
+			} else {
+				args = append(args, "<unknown>")
+			}
+		}
+
+		for i := 0; i < len(args); i = i + 2 {
+			if _, ok := args[i].(string); !ok {
+				// As this is the logging function not much we can do here
+				// without injecting into logs...
+				continue
+			}
+			val := args[i+1]
+			// Check if val is of type error. If error type doesn't
+			// implement json.Marshaler or encoding.TextMarshaler
+			// then set val to err.Error() so that it gets marshaled
+			if err, ok := val.(error); ok {
+				switch err.(type) {
+				case json.Marshaler, encoding.TextMarshaler:
+				default:
+					val = err.Error()
+				}
+			}
+			vals[args[i].(string)] = val
+		}
+	}
+
+	err := json.NewEncoder(z.w).Encode(vals)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// Emit the message and args at DEBUG level
+func (z *intLogger) Debug(msg string, args ...interface{}) {
+	z.Log(Debug, msg, args...)
+}
+
+// Emit the message and args at TRACE level
+func (z *intLogger) Trace(msg string, args ...interface{}) {
+	z.Log(Trace, msg, args...)
+}
+
+// Emit the message and args at INFO level
+func (z *intLogger) Info(msg string, args ...interface{}) {
+	z.Log(Info, msg, args...)
+}
+
+// Emit the message and args at WARN level
+func (z *intLogger) Warn(msg string, args ...interface{}) {
+	z.Log(Warn, msg, args...)
+}
+
+// Emit the message and args at ERROR level
+func (z *intLogger) Error(msg string, args ...interface{}) {
+	z.Log(Error, msg, args...)
+}
+
+// Indicate that the logger would emit TRACE level logs
+func (z *intLogger) IsTrace() bool {
+	return z.level == Trace
+}
+
+// Indicate that the logger would emit DEBUG level logs
+func (z *intLogger) IsDebug() bool {
+	return z.level <= Debug
+}
+
+// Indicate that the logger would emit INFO level logs
+func (z *intLogger) IsInfo() bool {
+	return z.level <= Info
+}
+
+// Indicate that the logger would emit WARN level logs
+func (z *intLogger) IsWarn() bool {
+	return z.level <= Warn
+}
+
+// Indicate that the logger would emit ERROR level logs
+func (z *intLogger) IsError() bool {
+	return z.level <= Error
+}
+
+// Return a sub-Logger for which every emitted log message will contain
+// the given key/value pairs. This is used to create a context specific
+// Logger.
+func (z *intLogger) With(args ...interface{}) Logger {
+	var nz intLogger = *z
+
+	nz.implied = append(nz.implied, args...)
+
+	return &nz
+}
+
+// Create a new sub-Logger that a name decending from the current name.
+// This is used to create a subsystem specific Logger.
+func (z *intLogger) Named(name string) Logger {
+	var nz intLogger = *z
+
+	if nz.name != "" {
+		nz.name = nz.name + "." + name
+	}
+
+	return &nz
+}
+
+// Create a new sub-Logger with an explicit name. This ignores the current
+// name. This is used to create a standalone logger that doesn't fall
+// within the normal hierarchy.
+func (z *intLogger) ResetNamed(name string) Logger {
+	var nz intLogger = *z
+
+	nz.name = name
+
+	return &nz
+}
+
+// Create a *log.Logger that will send it's data through this Logger. This
+// allows packages that expect to be using the standard library log to actually
+// use this logger.
+func (z *intLogger) StandardLogger(opts *StandardLoggerOptions) *log.Logger {
+	if opts == nil {
+		opts = &StandardLoggerOptions{}
+	}
+
+	return log.New(&stdlogAdapter{z, opts.InferLevels}, "", 0)
+}