all: blidly swap out glog to our log15, logs need rework

5 files changed, 0 insertions, 2022 deletions

diff --git a/logger/glog/LICENSE b/logger/glog/LICENSE
deleted file mode 100644
index 37ec93a14..000000000
--- a/logger/glog/LICENSE
+++ /dev/null
@@ -1,191 +0,0 @@
-Apache License
-Version 2.0, January 2004
-http://www.apache.org/licenses/
-
-TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
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-contract, or otherwise, unless required by applicable law (such as deliberate
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diff --git a/logger/glog/README b/logger/glog/README
deleted file mode 100644
index c7b1e60cc..000000000
--- a/logger/glog/README
+++ /dev/null
@@ -1,44 +0,0 @@
-glog
-====
-
-Leveled execution logs for Go.
-
-This is an efficient pure Go implementation of leveled logs in the
-manner of the open source C++ package
-	http://code.google.com/p/google-glog
-
-By binding methods to booleans it is possible to use the log package
-without paying the expense of evaluating the arguments to the log.
-Through the -vmodule flag, the package also provides fine-grained
-control over logging at the file level.
-
-The comment from glog.go introduces the ideas:
-
-	Package glog implements logging analogous to the Google-internal
-	C++ INFO/ERROR/V setup.  It provides functions Info, Warning,
-	Error, Fatal, plus formatting variants such as Infof. It
-	also provides V-style logging controlled by the -v and
-	-vmodule=file=2 flags.
-
-	Basic examples:
-
-		glog.Info("Prepare to repel boarders")
-
-		glog.Fatalf("Initialization failed: %s", err)
-
-	See the documentation for the V function for an explanation
-	of these examples:
-
-		if glog.V(2) {
-			glog.Info("Starting transaction...")
-		}
-
-		glog.V(2).Infoln("Processed", nItems, "elements")
-
-
-The repository contains an open source version of the log package
-used inside Google. The master copy of the source lives inside
-Google, not here. The code in this repo is for export only and is not itself
-under development. Feature requests will be ignored.
-
-Send bug reports to golang-nuts@googlegroups.com.
diff --git a/logger/glog/glog.go b/logger/glog/glog.go
deleted file mode 100644
index 0b33527c3..000000000
--- a/logger/glog/glog.go
+++ /dev/null
@@ -1,1223 +0,0 @@
-// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
-//
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package glog implements logging analogous to the Google-internal C++ INFO/ERROR/V setup.
-// It provides functions Info, Warning, Error, Fatal, plus formatting variants such as
-// Infof. It also provides V-style logging controlled by the -v and -vmodule=file=2 flags.
-//
-// Basic examples:
-//
-//	glog.Info("Prepare to repel boarders")
-//
-//	glog.Fatalf("Initialization failed: %s", err)
-//
-// See the documentation for the V function for an explanation of these examples:
-//
-//	if glog.V(2) {
-//		glog.Info("Starting transaction...")
-//	}
-//
-//	glog.V(2).Infoln("Processed", nItems, "elements")
-//
-// Log output is buffered and written periodically using Flush. Programs
-// should call Flush before exiting to guarantee all log output is written.
-//
-// By default, all log statements write to files in a temporary directory.
-// This package provides several flags that modify this behavior.
-// As a result, flag.Parse must be called before any logging is done.
-//
-//	-logtostderr=false
-//		Logs are written to standard error instead of to files.
-//	-alsologtostderr=false
-//		Logs are written to standard error as well as to files.
-//	-stderrthreshold=ERROR
-//		Log events at or above this severity are logged to standard
-//		error as well as to files.
-//	-log_dir=""
-//		Log files will be written to this directory instead of the
-//		default temporary directory.
-//
-//	Other flags provide aids to debugging.
-//
-//	-log_backtrace_at=""
-//		When set to a file and line number holding a logging statement,
-//		such as
-//			-log_backtrace_at=gopherflakes.go:234
-//		a stack trace will be written to the Info log whenever execution
-//		hits that statement. (Unlike with -vmodule, the ".go" must be
-//		present.)
-//	-v=0
-//		Enable V-leveled logging at the specified level.
-//	-vmodule=""
-//		The syntax of the argument is a comma-separated list of pattern=N,
-//		where pattern is a literal file name or "glob" pattern matching
-//		and N is a V level. For instance,
-//
-//			-vmodule=gopher.go=3
-//		sets the V level to 3 in all Go files named "gopher.go".
-//
-//			-vmodule=foo=3
-//		sets V to 3 in all files of any packages whose import path ends in "foo".
-//
-//			-vmodule=foo/*=3
-//		sets V to 3 in all files of any packages whose import path contains "foo".
-package glog
-
-import (
-	"bufio"
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	stdLog "log"
-	"os"
-	"regexp"
-	"runtime"
-	"strconv"
-	"strings"
-	"sync"
-	"sync/atomic"
-	"time"
-)
-
-// severity identifies the sort of log: info, warning etc. It also implements
-// the flag.Value interface. The -stderrthreshold flag is of type severity and
-// should be modified only through the flag.Value interface. The values match
-// the corresponding constants in C++.
-type severity int32 // sync/atomic int32
-
-// These constants identify the log levels in order of increasing severity.
-// A message written to a high-severity log file is also written to each
-// lower-severity log file.
-const (
-	infoLog severity = iota
-	warningLog
-	errorLog
-	fatalLog
-	numSeverity = 4
-)
-
-const severityChar = "IWEF"
-
-var severityName = []string{
-	infoLog:    "INFO",
-	warningLog: "WARNING",
-	errorLog:   "ERROR",
-	fatalLog:   "FATAL",
-}
-
-// these path prefixes are trimmed for display, but not when
-// matching vmodule filters.
-var trimPrefixes = []string{
-	"/github.com/ethereum/go-ethereum",
-	"/github.com/ethereum/ethash",
-}
-
-func trimToImportPath(file string) string {
-	if root := strings.LastIndex(file, "src/"); root != 0 {
-		file = file[root+3:]
-	}
-	return file
-}
-
-// SetV sets the global verbosity level
-func SetV(v int) {
-	logging.verbosity.set(Level(v))
-}
-
-// SetToStderr sets the global output style
-func SetToStderr(toStderr bool) {
-	logging.mu.Lock()
-	logging.toStderr = toStderr
-	logging.mu.Unlock()
-}
-
-// GetTraceLocation returns the global TraceLocation flag.
-func GetTraceLocation() *TraceLocation {
-	return &logging.traceLocation
-}
-
-// GetVModule returns the global verbosity pattern flag.
-func GetVModule() *moduleSpec {
-	return &logging.vmodule
-}
-
-// GetVerbosity returns the global verbosity level flag.
-func GetVerbosity() *Level {
-	return &logging.verbosity
-}
-
-// get returns the value of the severity.
-func (s *severity) get() severity {
-	return severity(atomic.LoadInt32((*int32)(s)))
-}
-
-// set sets the value of the severity.
-func (s *severity) set(val severity) {
-	atomic.StoreInt32((*int32)(s), int32(val))
-}
-
-// String is part of the flag.Value interface.
-func (s *severity) String() string {
-	return strconv.FormatInt(int64(*s), 10)
-}
-
-// Get is part of the flag.Value interface.
-func (s *severity) Get() interface{} {
-	return *s
-}
-
-// Set is part of the flag.Value interface.
-func (s *severity) Set(value string) error {
-	var threshold severity
-	// Is it a known name?
-	if v, ok := severityByName(value); ok {
-		threshold = v
-	} else {
-		v, err := strconv.Atoi(value)
-		if err != nil {
-			return err
-		}
-		threshold = severity(v)
-	}
-	logging.stderrThreshold.set(threshold)
-	return nil
-}
-
-func severityByName(s string) (severity, bool) {
-	s = strings.ToUpper(s)
-	for i, name := range severityName {
-		if name == s {
-			return severity(i), true
-		}
-	}
-	return 0, false
-}
-
-// OutputStats tracks the number of output lines and bytes written.
-type OutputStats struct {
-	lines int64
-	bytes int64
-}
-
-// Lines returns the number of lines written.
-func (s *OutputStats) Lines() int64 {
-	return atomic.LoadInt64(&s.lines)
-}
-
-// Bytes returns the number of bytes written.
-func (s *OutputStats) Bytes() int64 {
-	return atomic.LoadInt64(&s.bytes)
-}
-
-// Stats tracks the number of lines of output and number of bytes
-// per severity level. Values must be read with atomic.LoadInt64.
-var Stats struct {
-	Info, Warning, Error OutputStats
-}
-
-var severityStats = [numSeverity]*OutputStats{
-	infoLog:    &Stats.Info,
-	warningLog: &Stats.Warning,
-	errorLog:   &Stats.Error,
-}
-
-// Level is exported because it appears in the arguments to V and is
-// the type of the v flag, which can be set programmatically.
-// It's a distinct type because we want to discriminate it from logType.
-// Variables of type level are only changed under logging.mu.
-// The -v flag is read only with atomic ops, so the state of the logging
-// module is consistent.
-
-// Level is treated as a sync/atomic int32.
-
-// Level specifies a level of verbosity for V logs. *Level implements
-// flag.Value; the -v flag is of type Level and should be modified
-// only through the flag.Value interface.
-type Level int32
-
-// get returns the value of the Level.
-func (l *Level) get() Level {
-	return Level(atomic.LoadInt32((*int32)(l)))
-}
-
-// set sets the value of the Level.
-func (l *Level) set(val Level) {
-	atomic.StoreInt32((*int32)(l), int32(val))
-}
-
-// String is part of the flag.Value interface.
-func (l *Level) String() string {
-	return strconv.FormatInt(int64(*l), 10)
-}
-
-// Get is part of the flag.Value interface.
-func (l *Level) Get() interface{} {
-	return *l
-}
-
-// Set is part of the flag.Value interface.
-func (l *Level) Set(value string) error {
-	v, err := strconv.Atoi(value)
-	if err != nil {
-		return err
-	}
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	logging.setVState(Level(v), logging.vmodule.filter, false)
-	return nil
-}
-
-// moduleSpec represents the setting of the -vmodule flag.
-type moduleSpec struct {
-	filter []modulePat
-}
-
-// modulePat contains a filter for the -vmodule flag.
-// It holds a verbosity level and a file pattern to match.
-type modulePat struct {
-	pattern *regexp.Regexp
-	level   Level
-}
-
-func (m *moduleSpec) String() string {
-	// Lock because the type is not atomic. TODO: clean this up.
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	var b bytes.Buffer
-	for i, f := range m.filter {
-		if i > 0 {
-			b.WriteRune(',')
-		}
-		fmt.Fprintf(&b, "%s=%d", f.pattern, f.level)
-	}
-	return b.String()
-}
-
-// Get is part of the (Go 1.2)  flag.Getter interface. It always returns nil for this flag type since the
-// struct is not exported.
-func (m *moduleSpec) Get() interface{} {
-	return nil
-}
-
-var errVmoduleSyntax = errors.New("syntax error: expect comma-separated list of filename=N")
-
-// Syntax: -vmodule=recordio=2,file=1,gfs*=3
-func (m *moduleSpec) Set(value string) error {
-	var filter []modulePat
-	for _, pat := range strings.Split(value, ",") {
-		if len(pat) == 0 {
-			// Empty strings such as from a trailing comma can be ignored.
-			continue
-		}
-		patLev := strings.Split(pat, "=")
-		if len(patLev) != 2 || len(patLev[0]) == 0 || len(patLev[1]) == 0 {
-			return errVmoduleSyntax
-		}
-		pattern := patLev[0]
-		v, err := strconv.Atoi(patLev[1])
-		if err != nil {
-			return errors.New("syntax error: expect comma-separated list of filename=N")
-		}
-		if v < 0 {
-			return errors.New("negative value for vmodule level")
-		}
-		if v == 0 {
-			continue // Ignore. It's harmless but no point in paying the overhead.
-		}
-		// TODO: check syntax of filter?
-		re, _ := compileModulePattern(pattern)
-		filter = append(filter, modulePat{re, Level(v)})
-	}
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	logging.setVState(logging.verbosity, filter, true)
-	return nil
-}
-
-// compiles a vmodule pattern to a regular expression.
-func compileModulePattern(pat string) (*regexp.Regexp, error) {
-	re := ".*"
-	for _, comp := range strings.Split(pat, "/") {
-		if comp == "*" {
-			re += "(/.*)?"
-		} else if comp != "" {
-			// TODO: maybe return error if comp contains *
-			re += "/" + regexp.QuoteMeta(comp)
-		}
-	}
-	if !strings.HasSuffix(pat, ".go") {
-		re += "/[^/]+\\.go"
-	}
-	return regexp.Compile(re + "$")
-}
-
-// traceLocation represents the setting of the -log_backtrace_at flag.
-type TraceLocation struct {
-	file string
-	line int
-}
-
-// isSet reports whether the trace location has been specified.
-// logging.mu is held.
-func (t *TraceLocation) isSet() bool {
-	return t.line > 0
-}
-
-// match reports whether the specified file and line matches the trace location.
-// The argument file name is the full path, not the basename specified in the flag.
-// logging.mu is held.
-func (t *TraceLocation) match(file string, line int) bool {
-	if t.line != line {
-		return false
-	}
-	if i := strings.LastIndex(file, "/"); i >= 0 {
-		file = file[i+1:]
-	}
-	return t.file == file
-}
-
-func (t *TraceLocation) String() string {
-	// Lock because the type is not atomic. TODO: clean this up.
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	return fmt.Sprintf("%s:%d", t.file, t.line)
-}
-
-// Get is part of the (Go 1.2) flag.Getter interface. It always returns nil for this flag type since the
-// struct is not exported
-func (t *TraceLocation) Get() interface{} {
-	return nil
-}
-
-var errTraceSyntax = errors.New("syntax error: expect file.go:234")
-
-// Syntax: -log_backtrace_at=gopherflakes.go:234
-// Note that unlike vmodule the file extension is included here.
-func (t *TraceLocation) Set(value string) error {
-	if value == "" {
-		// Unset.
-		logging.mu.Lock()
-		t.line = 0
-		t.file = ""
-		logging.mu.Unlock()
-		return nil
-	}
-
-	fields := strings.Split(value, ":")
-	if len(fields) != 2 {
-		return errTraceSyntax
-	}
-	file, line := fields[0], fields[1]
-	if !strings.Contains(file, ".") {
-		return errTraceSyntax
-	}
-	v, err := strconv.Atoi(line)
-	if err != nil {
-		return errTraceSyntax
-	}
-	if v <= 0 {
-		return errors.New("negative or zero value for level")
-	}
-	logging.mu.Lock()
-	defer logging.mu.Unlock()
-	t.line = v
-	t.file = file
-	return nil
-}
-
-// flushSyncWriter is the interface satisfied by logging destinations.
-type flushSyncWriter interface {
-	Flush() error
-	Sync() error
-	io.Writer
-}
-
-func init() {
-	//flag.BoolVar(&logging.toStderr, "logtostderr", false, "log to standard error instead of files")
-	//flag.BoolVar(&logging.alsoToStderr, "alsologtostderr", false, "log to standard error as well as files")
-	//flag.Var(&logging.verbosity, "v", "log level for V logs")
-	//flag.Var(&logging.stderrThreshold, "stderrthreshold", "logs at or above this threshold go to stderr")
-	//flag.Var(&logging.vmodule, "vmodule", "comma-separated list of pattern=N settings for file-filtered logging")
-	//flag.Var(&logging.traceLocation, "log_backtrace_at", "when logging hits line file:N, emit a stack trace")
-
-	// Default stderrThreshold is ERROR.
-	logging.stderrThreshold = errorLog
-	logging.setVState(3, nil, false)
-	go logging.flushDaemon()
-}
-
-// Flush flushes all pending log I/O.
-func Flush() {
-	logging.lockAndFlushAll()
-}
-
-// loggingT collects all the global state of the logging setup.
-type loggingT struct {
-	// Boolean flags. Not handled atomically because the flag.Value interface
-	// does not let us avoid the =true, and that shorthand is necessary for
-	// compatibility. TODO: does this matter enough to fix? Seems unlikely.
-	toStderr     bool // The -logtostderr flag.
-	alsoToStderr bool // The -alsologtostderr flag.
-
-	// Level flag. Handled atomically.
-	stderrThreshold severity // The -stderrthreshold flag.
-
-	// freeList is a list of byte buffers, maintained under freeListMu.
-	freeList *buffer
-	// freeListMu maintains the free list. It is separate from the main mutex
-	// so buffers can be grabbed and printed to without holding the main lock,
-	// for better parallelization.
-	freeListMu sync.Mutex
-
-	// mu protects the remaining elements of this structure and is
-	// used to synchronize logging.
-	mu sync.Mutex
-	// file holds writer for each of the log types.
-	file [numSeverity]flushSyncWriter
-	// pcs is used in V to avoid an allocation when computing the caller's PC.
-	pcs [1]uintptr
-	// vmap is a cache of the V Level for each V() call site, identified by PC.
-	// It is wiped whenever the vmodule flag changes state.
-	vmap map[uintptr]Level
-	// filterLength stores the length of the vmodule filter chain. If greater
-	// than zero, it means vmodule is enabled. It may be read safely
-	// using sync.LoadInt32, but is only modified under mu.
-	filterLength int32
-	// traceLocation is the state of the -log_backtrace_at flag.
-	traceLocation TraceLocation
-	// These flags are modified only under lock, although verbosity may be fetched
-	// safely using atomic.LoadInt32.
-	vmodule   moduleSpec // The state of the -vmodule flag.
-	verbosity Level      // V logging level, the value of the -v flag/
-}
-
-// buffer holds a byte Buffer for reuse. The zero value is ready for use.
-type buffer struct {
-	bytes.Buffer
-	tmp  [64]byte // temporary byte array for creating headers.
-	next *buffer
-}
-
-var logging loggingT
-
-// setVState sets a consistent state for V logging.
-// l.mu is held.
-func (l *loggingT) setVState(verbosity Level, filter []modulePat, setFilter bool) {
-	// Turn verbosity off so V will not fire while we are in transition.
-	logging.verbosity.set(0)
-	// Ditto for filter length.
-	atomic.StoreInt32(&logging.filterLength, 0)
-
-	// Set the new filters and wipe the pc->Level map if the filter has changed.
-	if setFilter {
-		logging.vmodule.filter = filter
-		logging.vmap = make(map[uintptr]Level)
-	}
-
-	// Things are consistent now, so enable filtering and verbosity.
-	// They are enabled in order opposite to that in V.
-	atomic.StoreInt32(&logging.filterLength, int32(len(filter)))
-	logging.verbosity.set(verbosity)
-}
-
-// getBuffer returns a new, ready-to-use buffer.
-func (l *loggingT) getBuffer() *buffer {
-	l.freeListMu.Lock()
-	b := l.freeList
-	if b != nil {
-		l.freeList = b.next
-	}
-	l.freeListMu.Unlock()
-	if b == nil {
-		b = new(buffer)
-	} else {
-		b.next = nil
-		b.Reset()
-	}
-	return b
-}
-
-// putBuffer returns a buffer to the free list.
-func (l *loggingT) putBuffer(b *buffer) {
-	if b.Len() >= 256 {
-		// Let big buffers die a natural death.
-		return
-	}
-	l.freeListMu.Lock()
-	b.next = l.freeList
-	l.freeList = b
-	l.freeListMu.Unlock()
-}
-
-var timeNow = time.Now // Stubbed out for testing.
-
-/*
-header formats a log header as defined by the C++ implementation.
-It returns a buffer containing the formatted header and the user's file and line number.
-The depth specifies how many stack frames above lives the source line to be identified in the log message.
-
-Log lines have this form:
-	Lmmdd hh:mm:ss.uuuuuu threadid file:line] msg...
-where the fields are defined as follows:
-	L                A single character, representing the log level (eg 'I' for INFO)
-	mm               The month (zero padded; ie May is '05')
-	dd               The day (zero padded)
-	hh:mm:ss.uuuuuu  Time in hours, minutes and fractional seconds
-	threadid         The space-padded thread ID as returned by GetTID()
-	file             The file name
-	line             The line number
-	msg              The user-supplied message
-*/
-func (l *loggingT) header(s severity, depth int) (*buffer, string, int) {
-	_, file, line, ok := runtime.Caller(3 + depth)
-	if !ok {
-		file = "???"
-		line = 1
-	} else {
-		file = trimToImportPath(file)
-		for _, p := range trimPrefixes {
-			if strings.HasPrefix(file, p) {
-				file = file[len(p):]
-				break
-			}
-		}
-		file = file[1:] // drop '/'
-	}
-	return l.formatHeader(s, file, line), file, line
-}
-
-// formatHeader formats a log header using the provided file name and line number.
-func (l *loggingT) formatHeader(s severity, file string, line int) *buffer {
-	now := timeNow()
-	if line < 0 {
-		line = 0 // not a real line number, but acceptable to someDigits
-	}
-	if s > fatalLog {
-		s = infoLog // for safety.
-	}
-	buf := l.getBuffer()
-
-	// Avoid Fprintf, for speed. The format is so simple that we can do it quickly by hand.
-	// It's worth about 3X. Fprintf is hard.
-	_, month, day := now.Date()
-	hour, minute, second := now.Clock()
-	// Lmmdd hh:mm:ss.uuuuuu threadid file:line]
-	buf.tmp[0] = severityChar[s]
-	buf.twoDigits(1, int(month))
-	buf.twoDigits(3, day)
-	buf.tmp[5] = ' '
-	buf.twoDigits(6, hour)
-	buf.tmp[8] = ':'
-	buf.twoDigits(9, minute)
-	buf.tmp[11] = ':'
-	buf.twoDigits(12, second)
-	buf.tmp[14] = '.'
-	buf.nDigits(6, 15, now.Nanosecond()/1000, '0')
-	buf.tmp[21] = ' '
-	buf.Write(buf.tmp[:22])
-	buf.WriteString(file)
-	buf.tmp[0] = ':'
-	n := buf.someDigits(1, line)
-	buf.tmp[n+1] = ']'
-	buf.tmp[n+2] = ' '
-	buf.Write(buf.tmp[:n+3])
-	return buf
-}
-
-// Some custom tiny helper functions to print the log header efficiently.
-
-const digits = "0123456789"
-
-// twoDigits formats a zero-prefixed two-digit integer at buf.tmp[i].
-func (buf *buffer) twoDigits(i, d int) {
-	buf.tmp[i+1] = digits[d%10]
-	d /= 10
-	buf.tmp[i] = digits[d%10]
-}
-
-// nDigits formats an n-digit integer at buf.tmp[i],
-// padding with pad on the left.
-// It assumes d >= 0.
-func (buf *buffer) nDigits(n, i, d int, pad byte) {
-	j := n - 1
-	for ; j >= 0 && d > 0; j-- {
-		buf.tmp[i+j] = digits[d%10]
-		d /= 10
-	}
-	for ; j >= 0; j-- {
-		buf.tmp[i+j] = pad
-	}
-}
-
-// someDigits formats a zero-prefixed variable-width integer at buf.tmp[i].
-func (buf *buffer) someDigits(i, d int) int {
-	// Print into the top, then copy down. We know there's space for at least
-	// a 10-digit number.
-	j := len(buf.tmp)
-	for {
-		j--
-		buf.tmp[j] = digits[d%10]
-		d /= 10
-		if d == 0 {
-			break
-		}
-	}
-	return copy(buf.tmp[i:], buf.tmp[j:])
-}
-
-func (l *loggingT) println(s severity, args ...interface{}) {
-	buf, file, line := l.header(s, 0)
-	fmt.Fprintln(buf, args...)
-	l.output(s, buf, file, line, false)
-}
-
-func (l *loggingT) print(s severity, args ...interface{}) {
-	l.printDepth(s, 1, args...)
-}
-
-func (l *loggingT) printDepth(s severity, depth int, args ...interface{}) {
-	buf, file, line := l.header(s, depth)
-	fmt.Fprint(buf, args...)
-	if buf.Bytes()[buf.Len()-1] != '\n' {
-		buf.WriteByte('\n')
-	}
-	l.output(s, buf, file, line, false)
-}
-
-func (l *loggingT) printfmt(s severity, format string, args ...interface{}) {
-	buf, file, line := l.header(s, 0)
-	fmt.Fprintf(buf, format, args...)
-	if buf.Bytes()[buf.Len()-1] != '\n' {
-		buf.WriteByte('\n')
-	}
-	l.output(s, buf, file, line, false)
-}
-
-// printWithFileLine behaves like print but uses the provided file and line number.  If
-// alsoLogToStderr is true, the log message always appears on standard error; it
-// will also appear in the log file unless --logtostderr is set.
-func (l *loggingT) printWithFileLine(s severity, file string, line int, alsoToStderr bool, args ...interface{}) {
-	buf := l.formatHeader(s, file, line)
-	fmt.Fprint(buf, args...)
-	if buf.Bytes()[buf.Len()-1] != '\n' {
-		buf.WriteByte('\n')
-	}
-	l.output(s, buf, file, line, alsoToStderr)
-}
-
-// output writes the data to the log files and releases the buffer.
-func (l *loggingT) output(s severity, buf *buffer, file string, line int, alsoToStderr bool) {
-	l.mu.Lock()
-	if l.traceLocation.isSet() {
-		if l.traceLocation.match(file, line) {
-			buf.Write(stacks(false))
-		}
-	}
-	data := buf.Bytes()
-	if l.toStderr {
-		os.Stderr.Write(data)
-	} else {
-		if alsoToStderr || l.alsoToStderr || s >= l.stderrThreshold.get() {
-			os.Stderr.Write(data)
-		}
-		if l.file[s] == nil {
-			if err := l.createFiles(s); err != nil {
-				os.Stderr.Write(data) // Make sure the message appears somewhere.
-				l.exit(err)
-			}
-		}
-		switch s {
-		case fatalLog:
-			l.file[fatalLog].Write(data)
-			fallthrough
-		case errorLog:
-			l.file[errorLog].Write(data)
-			fallthrough
-		case warningLog:
-			l.file[warningLog].Write(data)
-			fallthrough
-		case infoLog:
-			l.file[infoLog].Write(data)
-		}
-	}
-	if s == fatalLog {
-		// If we got here via Exit rather than Fatal, print no stacks.
-		if atomic.LoadUint32(&fatalNoStacks) > 0 {
-			l.mu.Unlock()
-			timeoutFlush(10 * time.Second)
-			os.Exit(1)
-		}
-		// Dump all goroutine stacks before exiting.
-		// First, make sure we see the trace for the current goroutine on standard error.
-		// If -logtostderr has been specified, the loop below will do that anyway
-		// as the first stack in the full dump.
-		if !l.toStderr {
-			os.Stderr.Write(stacks(false))
-		}
-		// Write the stack trace for all goroutines to the files.
-		trace := stacks(true)
-		logExitFunc = func(error) {} // If we get a write error, we'll still exit below.
-		for log := fatalLog; log >= infoLog; log-- {
-			if f := l.file[log]; f != nil { // Can be nil if -logtostderr is set.
-				f.Write(trace)
-			}
-		}
-		l.mu.Unlock()
-		timeoutFlush(10 * time.Second)
-		os.Exit(255) // C++ uses -1, which is silly because it's anded with 255 anyway.
-	}
-	l.putBuffer(buf)
-	l.mu.Unlock()
-	if stats := severityStats[s]; stats != nil {
-		atomic.AddInt64(&stats.lines, 1)
-		atomic.AddInt64(&stats.bytes, int64(len(data)))
-	}
-}
-
-// timeoutFlush calls Flush and returns when it completes or after timeout
-// elapses, whichever happens first.  This is needed because the hooks invoked
-// by Flush may deadlock when glog.Fatal is called from a hook that holds
-// a lock.
-func timeoutFlush(timeout time.Duration) {
-	done := make(chan bool, 1)
-	go func() {
-		Flush() // calls logging.lockAndFlushAll()
-		done <- true
-	}()
-	select {
-	case <-done:
-	case <-time.After(timeout):
-		fmt.Fprintln(os.Stderr, "glog: Flush took longer than", timeout)
-	}
-}
-
-// stacks is a wrapper for runtime.Stack that attempts to recover the data for all goroutines.
-func stacks(all bool) []byte {
-	// We don't know how big the traces are, so grow a few times if they don't fit. Start large, though.
-	n := 10000
-	if all {
-		n = 100000
-	}
-	var trace []byte
-	for i := 0; i < 5; i++ {
-		trace = make([]byte, n)
-		nbytes := runtime.Stack(trace, all)
-		if nbytes < len(trace) {
-			return trace[:nbytes]
-		}
-		n *= 2
-	}
-	return trace
-}
-
-// logExitFunc provides a simple mechanism to override the default behavior
-// of exiting on error. Used in testing and to guarantee we reach a required exit
-// for fatal logs. Instead, exit could be a function rather than a method but that
-// would make its use clumsier.
-var logExitFunc func(error)
-
-// exit is called if there is trouble creating or writing log files.
-// It flushes the logs and exits the program; there's no point in hanging around.
-// l.mu is held.
-func (l *loggingT) exit(err error) {
-	fmt.Fprintf(os.Stderr, "log: exiting because of error: %s\n", err)
-	// If logExitFunc is set, we do that instead of exiting.
-	if logExitFunc != nil {
-		logExitFunc(err)
-		return
-	}
-	l.flushAll()
-	os.Exit(2)
-}
-
-// syncBuffer joins a bufio.Writer to its underlying file, providing access to the
-// file's Sync method and providing a wrapper for the Write method that provides log
-// file rotation. There are conflicting methods, so the file cannot be embedded.
-// l.mu is held for all its methods.
-type syncBuffer struct {
-	logger *loggingT
-	*bufio.Writer
-	file   *os.File
-	sev    severity
-	nbytes uint64 // The number of bytes written to this file
-}
-
-func (sb *syncBuffer) Sync() error {
-	return sb.file.Sync()
-}
-
-func (sb *syncBuffer) Write(p []byte) (n int, err error) {
-	if sb.nbytes+uint64(len(p)) >= MaxSize {
-		if err := sb.rotateFile(time.Now()); err != nil {
-			sb.logger.exit(err)
-		}
-	}
-	n, err = sb.Writer.Write(p)
-	sb.nbytes += uint64(n)
-	if err != nil {
-		sb.logger.exit(err)
-	}
-	return
-}
-
-// rotateFile closes the syncBuffer's file and starts a new one.
-func (sb *syncBuffer) rotateFile(now time.Time) error {
-	if sb.file != nil {
-		sb.Flush()
-		sb.file.Close()
-	}
-	var err error
-	sb.file, _, err = create(severityName[sb.sev], now)
-	sb.nbytes = 0
-	if err != nil {
-		return err
-	}
-
-	sb.Writer = bufio.NewWriterSize(sb.file, bufferSize)
-
-	// Write header.
-	var buf bytes.Buffer
-	fmt.Fprintf(&buf, "Log file created at: %s\n", now.Format("2006/01/02 15:04:05"))
-	fmt.Fprintf(&buf, "Running on machine: %s\n", host)
-	fmt.Fprintf(&buf, "Binary: Built with %s %s for %s/%s\n", runtime.Compiler, runtime.Version(), runtime.GOOS, runtime.GOARCH)
-	fmt.Fprintf(&buf, "Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg\n")
-	n, err := sb.file.Write(buf.Bytes())
-	sb.nbytes += uint64(n)
-	return err
-}
-
-// bufferSize sizes the buffer associated with each log file. It's large
-// so that log records can accumulate without the logging thread blocking
-// on disk I/O. The flushDaemon will block instead.
-const bufferSize = 256 * 1024
-
-// createFiles creates all the log files for severity from sev down to infoLog.
-// l.mu is held.
-func (l *loggingT) createFiles(sev severity) error {
-	now := time.Now()
-	// Files are created in decreasing severity order, so as soon as we find one
-	// has already been created, we can stop.
-	for s := sev; s >= infoLog && l.file[s] == nil; s-- {
-		sb := &syncBuffer{
-			logger: l,
-			sev:    s,
-		}
-		if err := sb.rotateFile(now); err != nil {
-			return err
-		}
-		l.file[s] = sb
-	}
-	return nil
-}
-
-const flushInterval = 30 * time.Second
-
-// flushDaemon periodically flushes the log file buffers.
-func (l *loggingT) flushDaemon() {
-	for range time.NewTicker(flushInterval).C {
-		l.lockAndFlushAll()
-	}
-}
-
-// lockAndFlushAll is like flushAll but locks l.mu first.
-func (l *loggingT) lockAndFlushAll() {
-	l.mu.Lock()
-	l.flushAll()
-	l.mu.Unlock()
-}
-
-// flushAll flushes all the logs and attempts to "sync" their data to disk.
-// l.mu is held.
-func (l *loggingT) flushAll() {
-	// Flush from fatal down, in case there's trouble flushing.
-	for s := fatalLog; s >= infoLog; s-- {
-		file := l.file[s]
-		if file != nil {
-			file.Flush() // ignore error
-			file.Sync()  // ignore error
-		}
-	}
-}
-
-// CopyStandardLogTo arranges for messages written to the Go "log" package's
-// default logs to also appear in the Google logs for the named and lower
-// severities.  Subsequent changes to the standard log's default output location
-// or format may break this behavior.
-//
-// Valid names are "INFO", "WARNING", "ERROR", and "FATAL".  If the name is not
-// recognized, CopyStandardLogTo panics.
-func CopyStandardLogTo(name string) {
-	sev, ok := severityByName(name)
-	if !ok {
-		panic(fmt.Sprintf("log.CopyStandardLogTo(%q): unrecognized severity name", name))
-	}
-	// Set a log format that captures the user's file and line:
-	//   d.go:23: message
-	stdLog.SetFlags(stdLog.Lshortfile)
-	stdLog.SetOutput(logBridge(sev))
-}
-
-// logBridge provides the Write method that enables CopyStandardLogTo to connect
-// Go's standard logs to the logs provided by this package.
-type logBridge severity
-
-// Write parses the standard logging line and passes its components to the
-// logger for severity(lb).
-func (lb logBridge) Write(b []byte) (n int, err error) {
-	var (
-		file = "???"
-		line = 1
-		text string
-	)
-	// Split "d.go:23: message" into "d.go", "23", and "message".
-	if parts := bytes.SplitN(b, []byte{':'}, 3); len(parts) != 3 || len(parts[0]) < 1 || len(parts[2]) < 1 {
-		text = fmt.Sprintf("bad log format: %s", b)
-	} else {
-		file = string(parts[0])
-		text = string(parts[2][1:]) // skip leading space
-		line, err = strconv.Atoi(string(parts[1]))
-		if err != nil {
-			text = fmt.Sprintf("bad line number: %s", b)
-			line = 1
-		}
-	}
-	// printWithFileLine with alsoToStderr=true, so standard log messages
-	// always appear on standard error.
-	logging.printWithFileLine(severity(lb), file, line, true, text)
-	return len(b), nil
-}
-
-// setV computes and remembers the V level for a given PC
-// when vmodule is enabled.
-// File pattern matching takes the basename of the file, stripped
-// of its .go suffix, and uses filepath.Match, which is a little more
-// general than the *? matching used in C++.
-// l.mu is held.
-func (l *loggingT) setV(pc uintptr) Level {
-	fn := runtime.FuncForPC(pc)
-	file, _ := fn.FileLine(pc)
-	file = trimToImportPath(file)
-	for _, filter := range l.vmodule.filter {
-		if filter.pattern.MatchString(file) {
-			l.vmap[pc] = filter.level
-			return filter.level
-		}
-	}
-	l.vmap[pc] = 0
-	return 0
-}
-
-// Verbose is a boolean type that implements Infof (like Printf) etc.
-// See the documentation of V for more information.
-type Verbose bool
-
-// V reports whether verbosity at the call site is at least the requested level.
-// The returned value is a boolean of type Verbose, which implements Info, Infoln
-// and Infof. These methods will write to the Info log if called.
-// Thus, one may write either
-//	if glog.V(2) { glog.Info("log this") }
-// or
-//	glog.V(2).Info("log this")
-// The second form is shorter but the first is cheaper if logging is off because it does
-// not evaluate its arguments.
-//
-// Whether an individual call to V generates a log record depends on the setting of
-// the -v and --vmodule flags; both are off by default. If the level in the call to
-// V is at least the value of -v, or of -vmodule for the source file containing the
-// call, the V call will log.
-func V(level Level) Verbose {
-	// This function tries hard to be cheap unless there's work to do.
-	// The fast path is two atomic loads and compares.
-
-	// Here is a cheap but safe test to see if V logging is enabled globally.
-	if logging.verbosity.get() >= level {
-		return Verbose(true)
-	}
-
-	// It's off globally but it vmodule may still be set.
-	// Here is another cheap but safe test to see if vmodule is enabled.
-	if atomic.LoadInt32(&logging.filterLength) > 0 {
-		// Now we need a proper lock to use the logging structure. The pcs field
-		// is shared so we must lock before accessing it. This is fairly expensive,
-		// but if V logging is enabled we're slow anyway.
-		logging.mu.Lock()
-		defer logging.mu.Unlock()
-		if runtime.Callers(2, logging.pcs[:]) == 0 {
-			return Verbose(false)
-		}
-		v, ok := logging.vmap[logging.pcs[0]]
-		if !ok {
-			v = logging.setV(logging.pcs[0])
-		}
-		return Verbose(v >= level)
-	}
-	return Verbose(false)
-}
-
-// Info is equivalent to the global Info function, guarded by the value of v.
-// See the documentation of V for usage.
-func (v Verbose) Info(args ...interface{}) {
-	if v {
-		logging.print(infoLog, args...)
-	}
-}
-
-// Infoln is equivalent to the global Infoln function, guarded by the value of v.
-// See the documentation of V for usage.
-func (v Verbose) Infoln(args ...interface{}) {
-	if v {
-		logging.println(infoLog, args...)
-	}
-}
-
-// Infof is equivalent to the global Infof function, guarded by the value of v.
-// See the documentation of V for usage.
-func (v Verbose) Infof(format string, args ...interface{}) {
-	if v {
-		logging.printfmt(infoLog, format, args...)
-	}
-}
-
-// Info logs to the INFO log.
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Info(args ...interface{}) {
-	logging.print(infoLog, args...)
-}
-
-// InfoDepth acts as Info but uses depth to determine which call frame to log.
-// InfoDepth(0, "msg") is the same as Info("msg").
-func InfoDepth(depth int, args ...interface{}) {
-	logging.printDepth(infoLog, depth, args...)
-}
-
-// Infoln logs to the INFO log.
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Infoln(args ...interface{}) {
-	logging.print(infoLog, args...)
-}
-
-// Infof logs to the INFO log.
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Infof(format string, args ...interface{}) {
-	logging.printfmt(infoLog, format, args...)
-}
-
-// Warning logs to the WARNING and INFO logs.
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Warning(args ...interface{}) {
-	logging.print(warningLog, args...)
-}
-
-// WarningDepth acts as Warning but uses depth to determine which call frame to log.
-// WarningDepth(0, "msg") is the same as Warning("msg").
-func WarningDepth(depth int, args ...interface{}) {
-	logging.printDepth(warningLog, depth, args...)
-}
-
-// Warningln logs to the WARNING and INFO logs.
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Warningln(args ...interface{}) {
-	logging.println(warningLog, args...)
-}
-
-// Warningf logs to the WARNING and INFO logs.
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Warningf(format string, args ...interface{}) {
-	logging.printfmt(warningLog, format, args...)
-}
-
-// Error logs to the ERROR, WARNING, and INFO logs.
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Error(args ...interface{}) {
-	logging.print(errorLog, args...)
-}
-
-// ErrorDepth acts as Error but uses depth to determine which call frame to log.
-// ErrorDepth(0, "msg") is the same as Error("msg").
-func ErrorDepth(depth int, args ...interface{}) {
-	logging.printDepth(errorLog, depth, args...)
-}
-
-// Errorln logs to the ERROR, WARNING, and INFO logs.
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Errorln(args ...interface{}) {
-	logging.println(errorLog, args...)
-}
-
-// Errorf logs to the ERROR, WARNING, and INFO logs.
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Errorf(format string, args ...interface{}) {
-	logging.printfmt(errorLog, format, args...)
-}
-
-// Fatal logs to the FATAL, ERROR, WARNING, and INFO logs,
-// including a stack trace of all running goroutines, then calls os.Exit(255).
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Fatal(args ...interface{}) {
-	logging.print(fatalLog, args...)
-}
-
-// FatalDepth acts as Fatal but uses depth to determine which call frame to log.
-// FatalDepth(0, "msg") is the same as Fatal("msg").
-func FatalDepth(depth int, args ...interface{}) {
-	logging.printDepth(fatalLog, depth, args...)
-}
-
-// Fatalln logs to the FATAL, ERROR, WARNING, and INFO logs,
-// including a stack trace of all running goroutines, then calls os.Exit(255).
-// Arguments are handled in the manner of fmt.Println; a newline is appended if missing.
-func Fatalln(args ...interface{}) {
-	logging.println(fatalLog, args...)
-}
-
-// Fatalf logs to the FATAL, ERROR, WARNING, and INFO logs,
-// including a stack trace of all running goroutines, then calls os.Exit(255).
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Fatalf(format string, args ...interface{}) {
-	logging.printfmt(fatalLog, format, args...)
-}
-
-// fatalNoStacks is non-zero if we are to exit without dumping goroutine stacks.
-// It allows Exit and relatives to use the Fatal logs.
-var fatalNoStacks uint32
-
-// Exit logs to the FATAL, ERROR, WARNING, and INFO logs, then calls os.Exit(1).
-// Arguments are handled in the manner of fmt.Print; a newline is appended if missing.
-func Exit(args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.print(fatalLog, args...)
-}
-
-// ExitDepth acts as Exit but uses depth to determine which call frame to log.
-// ExitDepth(0, "msg") is the same as Exit("msg").
-func ExitDepth(depth int, args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.printDepth(fatalLog, depth, args...)
-}
-
-// Exitln logs to the FATAL, ERROR, WARNING, and INFO logs, then calls os.Exit(1).
-func Exitln(args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.println(fatalLog, args...)
-}
-
-// Exitf logs to the FATAL, ERROR, WARNING, and INFO logs, then calls os.Exit(1).
-// Arguments are handled in the manner of fmt.Printf; a newline is appended if missing.
-func Exitf(format string, args ...interface{}) {
-	atomic.StoreUint32(&fatalNoStacks, 1)
-	logging.printfmt(fatalLog, format, args...)
-}
diff --git a/logger/glog/glog_file.go b/logger/glog/glog_file.go
deleted file mode 100644
index 2fc96eb4e..000000000
--- a/logger/glog/glog_file.go
+++ /dev/null
@@ -1,128 +0,0 @@
-// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
-//
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// File I/O for logs.
-
-package glog
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"os/user"
-	"path/filepath"
-	"strings"
-	"sync"
-	"time"
-)
-
-// MaxSize is the maximum size of a log file in bytes.
-var MaxSize uint64 = 1024 * 1024 * 1800
-
-// logDirs lists the candidate directories for new log files.
-var logDirs []string
-
-// If non-empty, overrides the choice of directory in which to write logs.
-// See createLogDirs for the full list of possible destinations.
-//var logDir = flag.String("log_dir", "", "If non-empty, write log files in this directory")
-var logDir *string = new(string)
-
-func SetLogDir(str string) {
-	*logDir = str
-}
-
-func createLogDirs() {
-	if *logDir != "" {
-		logDirs = append(logDirs, *logDir)
-	}
-	logDirs = append(logDirs, os.TempDir())
-}
-
-var (
-	pid      = os.Getpid()
-	program  = filepath.Base(os.Args[0])
-	host     = "unknownhost"
-	userName = "unknownuser"
-)
-
-func init() {
-	h, err := os.Hostname()
-	if err == nil {
-		host = shortHostname(h)
-	}
-
-	current, err := user.Current()
-	if err == nil {
-		userName = current.Username
-	}
-
-	// Sanitize userName since it may contain filepath separators on Windows.
-	userName = strings.Replace(userName, `\`, "_", -1)
-}
-
-// shortHostname returns its argument, truncating at the first period.
-// For instance, given "www.google.com" it returns "www".
-func shortHostname(hostname string) string {
-	if i := strings.Index(hostname, "."); i >= 0 {
-		return hostname[:i]
-	}
-	return hostname
-}
-
-// logName returns a new log file name containing tag, with start time t, and
-// the name for the symlink for tag.
-func logName(tag string, t time.Time) (name, link string) {
-	name = fmt.Sprintf("%s.%s.%s.log.%s.%04d%02d%02d-%02d%02d%02d.%d",
-		program,
-		host,
-		userName,
-		tag,
-		t.Year(),
-		t.Month(),
-		t.Day(),
-		t.Hour(),
-		t.Minute(),
-		t.Second(),
-		pid)
-	return name, program + "." + tag
-}
-
-var onceLogDirs sync.Once
-
-// create creates a new log file and returns the file and its filename, which
-// contains tag ("INFO", "FATAL", etc.) and t.  If the file is created
-// successfully, create also attempts to update the symlink for that tag, ignoring
-// errors.
-func create(tag string, t time.Time) (f *os.File, filename string, err error) {
-	onceLogDirs.Do(createLogDirs)
-	if len(logDirs) == 0 {
-		return nil, "", errors.New("log: no log dirs")
-	}
-	name, link := logName(tag, t)
-	var lastErr error
-	for _, dir := range logDirs {
-		fname := filepath.Join(dir, name)
-		f, err := os.Create(fname)
-		if err == nil {
-			symlink := filepath.Join(dir, link)
-			os.Remove(symlink)        // ignore err
-			os.Symlink(name, symlink) // ignore err
-			return f, fname, nil
-		}
-		lastErr = err
-	}
-	return nil, "", fmt.Errorf("log: cannot create log: %v", lastErr)
-}
diff --git a/logger/glog/glog_test.go b/logger/glog/glog_test.go
deleted file mode 100644
index b58f3d642..000000000
--- a/logger/glog/glog_test.go
+++ /dev/null
@@ -1,436 +0,0 @@
-// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
-//
-// Copyright 2013 Google Inc. All Rights Reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package glog
-
-import (
-	"bytes"
-	"fmt"
-	stdLog "log"
-	"path/filepath"
-	"runtime"
-	"strconv"
-	"strings"
-	"testing"
-	"time"
-)
-
-// Test that shortHostname works as advertised.
-func TestShortHostname(t *testing.T) {
-	for hostname, expect := range map[string]string{
-		"":                "",
-		"host":            "host",
-		"host.google.com": "host",
-	} {
-		if got := shortHostname(hostname); expect != got {
-			t.Errorf("shortHostname(%q): expected %q, got %q", hostname, expect, got)
-		}
-	}
-}
-
-// flushBuffer wraps a bytes.Buffer to satisfy flushSyncWriter.
-type flushBuffer struct {
-	bytes.Buffer
-}
-
-func (f *flushBuffer) Flush() error {
-	return nil
-}
-
-func (f *flushBuffer) Sync() error {
-	return nil
-}
-
-// swap sets the log writers and returns the old array.
-func (l *loggingT) swap(writers [numSeverity]flushSyncWriter) (old [numSeverity]flushSyncWriter) {
-	l.mu.Lock()
-	defer l.mu.Unlock()
-	old = l.file
-	for i, w := range writers {
-		logging.file[i] = w
-	}
-	return
-}
-
-// newBuffers sets the log writers to all new byte buffers and returns the old array.
-func (l *loggingT) newBuffers() [numSeverity]flushSyncWriter {
-	return l.swap([numSeverity]flushSyncWriter{new(flushBuffer), new(flushBuffer), new(flushBuffer), new(flushBuffer)})
-}
-
-// contents returns the specified log value as a string.
-func contents(s severity) string {
-	return logging.file[s].(*flushBuffer).String()
-}
-
-// contains reports whether the string is contained in the log.
-func contains(s severity, str string, t *testing.T) bool {
-	return strings.Contains(contents(s), str)
-}
-
-// setFlags configures the logging flags how the test expects them.
-func setFlags() {
-	logging.toStderr = false
-}
-
-// Test that Info works as advertised.
-func TestInfo(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	Info("test")
-	if !contains(infoLog, "I", t) {
-		t.Errorf("Info has wrong character: %q", contents(infoLog))
-	}
-	if !contains(infoLog, "test", t) {
-		t.Error("Info failed")
-	}
-}
-
-func TestInfoDepth(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-
-	f := func() { InfoDepth(1, "depth-test1") }
-
-	// The next three lines must stay together
-	_, _, wantLine, _ := runtime.Caller(0)
-	InfoDepth(0, "depth-test0")
-	f()
-
-	msgs := strings.Split(strings.TrimSuffix(contents(infoLog), "\n"), "\n")
-	if len(msgs) != 2 {
-		t.Fatalf("Got %d lines, expected 2", len(msgs))
-	}
-
-	for i, m := range msgs {
-		if !strings.HasPrefix(m, "I") {
-			t.Errorf("InfoDepth[%d] has wrong character: %q", i, m)
-		}
-		w := fmt.Sprintf("depth-test%d", i)
-		if !strings.Contains(m, w) {
-			t.Errorf("InfoDepth[%d] missing %q: %q", i, w, m)
-		}
-
-		// pull out the line number (between : and ])
-		msg := m[strings.LastIndex(m, ":")+1:]
-		x := strings.Index(msg, "]")
-		if x < 0 {
-			t.Errorf("InfoDepth[%d]: missing ']': %q", i, m)
-			continue
-		}
-		line, err := strconv.Atoi(msg[:x])
-		if err != nil {
-			t.Errorf("InfoDepth[%d]: bad line number: %q", i, m)
-			continue
-		}
-		wantLine++
-		if wantLine != line {
-			t.Errorf("InfoDepth[%d]: got line %d, want %d", i, line, wantLine)
-		}
-	}
-}
-
-func init() {
-	CopyStandardLogTo("INFO")
-}
-
-// Test that CopyStandardLogTo panics on bad input.
-func TestCopyStandardLogToPanic(t *testing.T) {
-	defer func() {
-		if s, ok := recover().(string); !ok || !strings.Contains(s, "LOG") {
-			t.Errorf(`CopyStandardLogTo("LOG") should have panicked: %v`, s)
-		}
-	}()
-	CopyStandardLogTo("LOG")
-}
-
-// Test that using the standard log package logs to INFO.
-func TestStandardLog(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	stdLog.Print("test")
-	if !contains(infoLog, "I", t) {
-		t.Errorf("Info has wrong character: %q", contents(infoLog))
-	}
-	if !contains(infoLog, "test", t) {
-		t.Error("Info failed")
-	}
-}
-
-// Test that the header has the correct format.
-func TestHeader(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	defer func(previous func() time.Time) { timeNow = previous }(timeNow)
-	timeNow = func() time.Time {
-		return time.Date(2006, 1, 2, 15, 4, 5, .067890e9, time.Local)
-	}
-	pid = 1234
-	Info("test")
-	var line int
-	format := "I0102 15:04:05.067890 logger/glog/glog_test.go:%d] test\n"
-	n, err := fmt.Sscanf(contents(infoLog), format, &line)
-	if n != 1 || err != nil {
-		t.Errorf("log format error: %d elements, error %s:\n%s", n, err, contents(infoLog))
-	}
-	// Scanf treats multiple spaces as equivalent to a single space,
-	// so check for correct space-padding also.
-	want := fmt.Sprintf(format, line)
-	if contents(infoLog) != want {
-		t.Errorf("log format error: got:\n\t%q\nwant:\t%q", contents(infoLog), want)
-	}
-}
-
-// Test that an Error log goes to Warning and Info.
-// Even in the Info log, the source character will be E, so the data should
-// all be identical.
-func TestError(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	Error("test")
-	if !contains(errorLog, "E", t) {
-		t.Errorf("Error has wrong character: %q", contents(errorLog))
-	}
-	if !contains(errorLog, "test", t) {
-		t.Error("Error failed")
-	}
-	str := contents(errorLog)
-	if !contains(warningLog, str, t) {
-		t.Error("Warning failed")
-	}
-	if !contains(infoLog, str, t) {
-		t.Error("Info failed")
-	}
-}
-
-// Test that a Warning log goes to Info.
-// Even in the Info log, the source character will be W, so the data should
-// all be identical.
-func TestWarning(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	Warning("test")
-	if !contains(warningLog, "W", t) {
-		t.Errorf("Warning has wrong character: %q", contents(warningLog))
-	}
-	if !contains(warningLog, "test", t) {
-		t.Error("Warning failed")
-	}
-	str := contents(warningLog)
-	if !contains(infoLog, str, t) {
-		t.Error("Info failed")
-	}
-}
-
-// Test that a V log goes to Info.
-func TestV(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	logging.verbosity.Set("2")
-	defer logging.verbosity.Set("0")
-	V(2).Info("test")
-	if !contains(infoLog, "I", t) {
-		t.Errorf("Info has wrong character: %q", contents(infoLog))
-	}
-	if !contains(infoLog, "test", t) {
-		t.Error("Info failed")
-	}
-}
-
-// Test that a vmodule enables a log in this file.
-func TestVmoduleOn(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	logging.vmodule.Set("glog_test.go=2")
-	defer logging.vmodule.Set("")
-	if !V(1) {
-		t.Error("V not enabled for 1")
-	}
-	if !V(2) {
-		t.Error("V not enabled for 2")
-	}
-	if V(3) {
-		t.Error("V enabled for 3")
-	}
-	V(2).Info("test")
-	if !contains(infoLog, "I", t) {
-		t.Errorf("Info has wrong character: %q", contents(infoLog))
-	}
-	if !contains(infoLog, "test", t) {
-		t.Error("Info failed")
-	}
-}
-
-// Test that a vmodule of another file does not enable a log in this file.
-func TestVmoduleOff(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	logging.vmodule.Set("notthisfile=2")
-	defer logging.vmodule.Set("")
-	for i := 1; i <= 3; i++ {
-		if V(Level(i)) {
-			t.Errorf("V enabled for %d", i)
-		}
-	}
-	V(2).Info("test")
-	if contents(infoLog) != "" {
-		t.Error("V logged incorrectly")
-	}
-}
-
-var patternTests = []struct{ input, want string }{
-	{"foo/bar/x.go", ".*/foo/bar/x\\.go$"},
-	{"foo/*/x.go", ".*/foo(/.*)?/x\\.go$"},
-	{"foo/*", ".*/foo(/.*)?/[^/]+\\.go$"},
-}
-
-func TestCompileModulePattern(t *testing.T) {
-	for _, test := range patternTests {
-		re, err := compileModulePattern(test.input)
-		if err != nil {
-			t.Fatalf("%s: %v", test.input, err)
-		}
-		if re.String() != test.want {
-			t.Errorf("mismatch for %q: got %q, want %q", test.input, re.String(), test.want)
-		}
-	}
-}
-
-// vGlobs are patterns that match/don't match this file at V=2.
-var vGlobs = map[string]bool{
-	// Easy to test the numeric match here.
-	"glog_test.go=1": false, // If -vmodule sets V to 1, V(2) will fail.
-	"glog_test.go=2": true,
-	"glog_test.go=3": true, // If -vmodule sets V to 1, V(3) will succeed.
-
-	// Import path prefix matching
-	"logger/glog=1": false,
-	"logger/glog=2": true,
-	"logger/glog=3": true,
-
-	// Import path glob matching
-	"logger/*=1": false,
-	"logger/*=2": true,
-	"logger/*=3": true,
-
-	// These all use 2 and check the patterns.
-	"*=2": true,
-}
-
-// Test that vmodule globbing works as advertised.
-func testVmoduleGlob(pat string, match bool, t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	defer logging.vmodule.Set("")
-	logging.vmodule.Set(pat)
-	if V(2) != Verbose(match) {
-		t.Errorf("incorrect match for %q: got %t expected %t", pat, V(2), match)
-	}
-}
-
-// Test that a vmodule globbing works as advertised.
-func TestVmoduleGlob(t *testing.T) {
-	for glob, match := range vGlobs {
-		testVmoduleGlob(glob, match, t)
-	}
-}
-
-func TestRollover(t *testing.T) {
-	setFlags()
-	var err error
-	defer func(previous func(error)) { logExitFunc = previous }(logExitFunc)
-	logExitFunc = func(e error) {
-		err = e
-	}
-	defer func(previous uint64) { MaxSize = previous }(MaxSize)
-	MaxSize = 512
-
-	Info("x") // Be sure we have a file.
-	info, ok := logging.file[infoLog].(*syncBuffer)
-	if !ok {
-		t.Fatal("info wasn't created")
-	}
-	if err != nil {
-		t.Fatalf("info has initial error: %v", err)
-	}
-	fname0 := info.file.Name()
-	Info(strings.Repeat("x", int(MaxSize))) // force a rollover
-	if err != nil {
-		t.Fatalf("info has error after big write: %v", err)
-	}
-
-	// Make sure the next log file gets a file name with a different
-	// time stamp.
-	//
-	// TODO: determine whether we need to support subsecond log
-	// rotation.  C++ does not appear to handle this case (nor does it
-	// handle Daylight Savings Time properly).
-	time.Sleep(1 * time.Second)
-
-	Info("x") // create a new file
-	if err != nil {
-		t.Fatalf("error after rotation: %v", err)
-	}
-	fname1 := info.file.Name()
-	if fname0 == fname1 {
-		t.Errorf("info.f.Name did not change: %v", fname0)
-	}
-	if info.nbytes >= MaxSize {
-		t.Errorf("file size was not reset: %d", info.nbytes)
-	}
-}
-
-func TestLogBacktraceAt(t *testing.T) {
-	setFlags()
-	defer logging.swap(logging.newBuffers())
-	// The peculiar style of this code simplifies line counting and maintenance of the
-	// tracing block below.
-	var infoLine string
-	setTraceLocation := func(file string, line int, ok bool, delta int) {
-		if !ok {
-			t.Fatal("could not get file:line")
-		}
-		_, file = filepath.Split(file)
-		infoLine = fmt.Sprintf("%s:%d", file, line+delta)
-		err := logging.traceLocation.Set(infoLine)
-		if err != nil {
-			t.Fatal("error setting log_backtrace_at: ", err)
-		}
-	}
-	{
-		// Start of tracing block. These lines know about each other's relative position.
-		_, file, line, ok := runtime.Caller(0)
-		setTraceLocation(file, line, ok, +2) // Two lines between Caller and Info calls.
-		Info("we want a stack trace here")
-	}
-	numAppearances := strings.Count(contents(infoLog), infoLine)
-	if numAppearances < 2 {
-		// Need 2 appearances, one in the log header and one in the trace:
-		//   log_test.go:281: I0511 16:36:06.952398 02238 log_test.go:280] we want a stack trace here
-		//   ...
-		//   github.com/glog/glog_test.go:280 (0x41ba91)
-		//   ...
-		// We could be more precise but that would require knowing the details
-		// of the traceback format, which may not be dependable.
-		t.Fatal("got no trace back; log is ", contents(infoLog))
-	}
-}
-
-func BenchmarkHeader(b *testing.B) {
-	for i := 0; i < b.N; i++ {
-		buf, _, _ := logging.header(infoLog, 0)
-		logging.putBuffer(buf)
-	}
-}