Godeps: Bump go-systemd, add coreos/pkg/dlopen.

vendor/github.com/coreos/pkg/capnslog/README.md

@@ -1,32 +1,33 @@
-# CoreOS Log
+# capnslog, the CoreOS logging package
 
-There are far too many logging packages out there, with varying degrees of licenses, far too many features (colorization, all sorts of log frameworks) or are just a pain to use (lack of `Fatalln()`?)
+There are far too many logging packages out there, with varying degrees of licenses, far too many features (colorization, all sorts of log frameworks) or are just a pain to use (lack of `Fatalln()`?).
+capnslog provides a simple but consistent logging interface suitable for all kinds of projects.
 
-## Design Principles
+### Design Principles
 
-* `package main` is the place where logging gets turned on and routed
+##### `package main` is the place where logging gets turned on and routed
 
 A library should not touch log options, only generate log entries. Libraries are silent until main lets them speak.
 
-* All log options are runtime-configurable. 
+##### All log options are runtime-configurable. 
 
 Still the job of `main` to expose these configurations. `main` may delegate this to, say, a configuration webhook, but does so explicitly. 
 
-* There is one log object per package. It is registered under its repository and package name.
+##### There is one log object per package. It is registered under its repository and package name.
 
 `main` activates logging for its repository and any dependency repositories it would also like to have output in its logstream. `main` also dictates at which level each subpackage logs.
 
-* There is *one* output stream, and it is an `io.Writer` composed with a formatter.
+##### There is *one* output stream, and it is an `io.Writer` composed with a formatter.
 
 Splitting streams is probably not the job of your program, but rather, your log aggregation framework. If you must split output streams, again, `main` configures this and you can write a very simple two-output struct that satisfies io.Writer.
 
 Fancy colorful formatting and JSON output are beyond the scope of a basic logging framework -- they're application/log-collector dependant. These are, at best, provided as options, but more likely, provided by your application.
 
-* Log objects are an interface
+##### Log objects are an interface
 
 An object knows best how to print itself. Log objects can collect more interesting metadata if they wish, however, because text isn't going away anytime soon, they must all be marshalable to text. The simplest log object is a string, which returns itself. If you wish to do more fancy tricks for printing your log objects, see also JSON output -- introspect and write a formatter which can handle your advanced log interface. Making strings is the only thing guaranteed.
 
-* Log levels have specific meanings:
+##### Log levels have specific meanings:
 
   * Critical: Unrecoverable. Must fail.
   * Error: Data has been lost, a request has failed for a bad reason, or a required resource has been lost

vendor/github.com/coreos/pkg/capnslog/formatters.go

@@ -18,6 +18,8 @@ import (
 	"bufio"
 	"fmt"
 	"io"
+	"log"
+	"runtime"
 	"strings"
 	"time"
 )
@@ -27,7 +29,7 @@ type Formatter interface {
 	Flush()
 }
 
-func NewStringFormatter(w io.Writer) *StringFormatter {
+func NewStringFormatter(w io.Writer) Formatter {
 	return &StringFormatter{
 		w: bufio.NewWriter(w),
 	}
@@ -38,26 +40,118 @@ type StringFormatter struct {
 }
 
 func (s *StringFormatter) Format(pkg string, l LogLevel, i int, entries ...interface{}) {
-	now := time.Now()
-	y, m, d := now.Date()
-	h, min, sec := now.Clock()
-	s.w.WriteString(fmt.Sprintf("%d/%02d/%d %02d:%02d:%02d ", y, m, d, h, min, sec))
-	s.writeEntries(pkg, l, i, entries...)
+	now := time.Now().UTC()
+	s.w.WriteString(now.Format(time.RFC3339))
+	s.w.WriteByte(' ')
+	writeEntries(s.w, pkg, l, i, entries...)
+	s.Flush()
 }
 
-func (s *StringFormatter) writeEntries(pkg string, _ LogLevel, _ int, entries ...interface{}) {
+func writeEntries(w *bufio.Writer, pkg string, _ LogLevel, _ int, entries ...interface{}) {
 	if pkg != "" {
-		s.w.WriteString(pkg + ": ")
+		w.WriteString(pkg + ": ")
 	}
 	str := fmt.Sprint(entries...)
 	endsInNL := strings.HasSuffix(str, "\n")
-	s.w.WriteString(str)
+	w.WriteString(str)
 	if !endsInNL {
-		s.w.WriteString("\n")
+		w.WriteString("\n")
 	}
-	s.Flush()
 }
 
 func (s *StringFormatter) Flush() {
 	s.w.Flush()
 }
+
+func NewPrettyFormatter(w io.Writer, debug bool) Formatter {
+	return &PrettyFormatter{
+		w:     bufio.NewWriter(w),
+		debug: debug,
+	}
+}
+
+type PrettyFormatter struct {
+	w     *bufio.Writer
+	debug bool
+}
+
+func (c *PrettyFormatter) Format(pkg string, l LogLevel, depth int, entries ...interface{}) {
+	now := time.Now()
+	ts := now.Format("2006-01-02 15:04:05")
+	c.w.WriteString(ts)
+	ms := now.Nanosecond() / 1000
+	c.w.WriteString(fmt.Sprintf(".%06d", ms))
+	if c.debug {
+		_, file, line, ok := runtime.Caller(depth) // It's always the same number of frames to the user's call.
+		if !ok {
+			file = "???"
+			line = 1
+		} else {
+			slash := strings.LastIndex(file, "/")
+			if slash >= 0 {
+				file = file[slash+1:]
+			}
+		}
+		if line < 0 {
+			line = 0 // not a real line number
+		}
+		c.w.WriteString(fmt.Sprintf(" [%s:%d]", file, line))
+	}
+	c.w.WriteString(fmt.Sprint(" ", l.Char(), " | "))
+	writeEntries(c.w, pkg, l, depth, entries...)
+	c.Flush()
+}
+
+func (c *PrettyFormatter) Flush() {
+	c.w.Flush()
+}
+
+// LogFormatter emulates the form of the traditional built-in logger.
+type LogFormatter struct {
+	logger *log.Logger
+	prefix string
+}
+
+// NewLogFormatter is a helper to produce a new LogFormatter struct. It uses the
+// golang log package to actually do the logging work so that logs look similar.
+func NewLogFormatter(w io.Writer, prefix string, flag int) Formatter {
+	return &LogFormatter{
+		logger: log.New(w, "", flag), // don't use prefix here
+		prefix: prefix,               // save it instead
+	}
+}
+
+// Format builds a log message for the LogFormatter. The LogLevel is ignored.
+func (lf *LogFormatter) Format(pkg string, _ LogLevel, _ int, entries ...interface{}) {
+	str := fmt.Sprint(entries...)
+	prefix := lf.prefix
+	if pkg != "" {
+		prefix = fmt.Sprintf("%s%s: ", prefix, pkg)
+	}
+	lf.logger.Output(5, fmt.Sprintf("%s%v", prefix, str)) // call depth is 5
+}
+
+// Flush is included so that the interface is complete, but is a no-op.
+func (lf *LogFormatter) Flush() {
+	// noop
+}
+
+// NilFormatter is a no-op log formatter that does nothing.
+type NilFormatter struct {
+}
+
+// NewNilFormatter is a helper to produce a new LogFormatter struct. It logs no
+// messages so that you can cause part of your logging to be silent.
+func NewNilFormatter() Formatter {
+	return &NilFormatter{}
+}
+
+// Format does nothing.
+func (_ *NilFormatter) Format(_ string, _ LogLevel, _ int, _ ...interface{}) {
+	// noop
+}
+
+// Flush is included so that the interface is complete, but is a no-op.
+func (_ *NilFormatter) Flush() {
+	// noop
+}

vendor/github.com/coreos/pkg/capnslog/glog_formatter.go

@@ -44,7 +44,7 @@ func (g GlogFormatter) Format(pkg string, level LogLevel, depth int, entries ...
 
 func GlogHeader(level LogLevel, depth int) []byte {
 	// Lmmdd hh:mm:ss.uuuuuu threadid file:line]
-	now := time.Now()
+	now := time.Now().UTC()
 	_, file, line, ok := runtime.Caller(depth) // It's always the same number of frames to the user's call.
 	if !ok {
 		file = "???"
@@ -73,6 +73,7 @@ func GlogHeader(level LogLevel, depth int) []byte {
 	twoDigits(buf, second)
 	buf.WriteByte('.')
 	buf.WriteString(strconv.Itoa(now.Nanosecond() / 1000))
+	buf.WriteByte('Z')
 	buf.WriteByte(' ')
 	buf.WriteString(strconv.Itoa(pid))
 	buf.WriteByte(' ')

vendor/github.com/coreos/pkg/capnslog/init.go

@@ -0,0 +1,49 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// 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.
+//
+// +build !windows
+
+package capnslog
+
+import (
+	"io"
+	"os"
+	"syscall"
+)
+
+// Here's where the opinionation comes in. We need some sensible defaults,
+// especially after taking over the log package. Your project (whatever it may
+// be) may see things differently. That's okay; there should be no defaults in
+// the main package that cannot be controlled or overridden programatically,
+// otherwise it's a bug. Doing so is creating your own init_log.go file much
+// like this one.
+
+func init() {
+	initHijack()
+
+	// Go `log` pacakge uses os.Stderr.
+	SetFormatter(NewDefaultFormatter(os.Stderr))
+	SetGlobalLogLevel(INFO)
+}
+
+func NewDefaultFormatter(out io.Writer) Formatter {
+	if syscall.Getppid() == 1 {
+		// We're running under init, which may be systemd.
+		f, err := NewJournaldFormatter()
+		if err == nil {
+			return f
+		}
+	}
+	return NewPrettyFormatter(out, false)
+}

vendor/github.com/coreos/pkg/capnslog/init_windows.go

@@ -0,0 +1,25 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// 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 capnslog
+
+import "os"
+
+func init() {
+	initHijack()
+
+	// Go `log` package uses os.Stderr.
+	SetFormatter(NewPrettyFormatter(os.Stderr, false))
+	SetGlobalLogLevel(INFO)
+}

vendor/github.com/coreos/pkg/capnslog/journald_formatter.go

@@ -0,0 +1,68 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// 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.
+//
+// +build !windows
+
+package capnslog
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/coreos/go-systemd/journal"
+)
+
+func NewJournaldFormatter() (Formatter, error) {
+	if !journal.Enabled() {
+		return nil, errors.New("No systemd detected")
+	}
+	return &journaldFormatter{}, nil
+}
+
+type journaldFormatter struct{}
+
+func (j *journaldFormatter) Format(pkg string, l LogLevel, _ int, entries ...interface{}) {
+	var pri journal.Priority
+	switch l {
+	case CRITICAL:
+		pri = journal.PriCrit
+	case ERROR:
+		pri = journal.PriErr
+	case WARNING:
+		pri = journal.PriWarning
+	case NOTICE:
+		pri = journal.PriNotice
+	case INFO:
+		pri = journal.PriInfo
+	case DEBUG:
+		pri = journal.PriDebug
+	case TRACE:
+		pri = journal.PriDebug
+	default:
+		panic("Unhandled loglevel")
+	}
+	msg := fmt.Sprint(entries...)
+	tags := map[string]string{
+		"PACKAGE":           pkg,
+		"SYSLOG_IDENTIFIER": filepath.Base(os.Args[0]),
+	}
+	err := journal.Send(msg, pri, tags)
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+	}
+}
+
+func (j *journaldFormatter) Flush() {}

vendor/github.com/coreos/pkg/capnslog/log_hijack.go

@@ -18,7 +18,7 @@ import (
 	"log"
 )
 
-func init() {
+func initHijack() {
 	pkg := NewPackageLogger("log", "")
 	w := packageWriter{pkg}
 	log.SetFlags(0)

vendor/github.com/coreos/pkg/capnslog/pkg_logger.go

@@ -24,20 +24,22 @@ type PackageLogger struct {
 	level LogLevel
 }
 
-const calldepth = 3
+const calldepth = 2
 
 func (p *PackageLogger) internalLog(depth int, inLevel LogLevel, entries ...interface{}) {
+	logger.Lock()
+	defer logger.Unlock()
 	if inLevel != CRITICAL && p.level < inLevel {
 		return
 	}
-	logger.Lock()
-	defer logger.Unlock()
 	if logger.formatter != nil {
 		logger.formatter.Format(p.pkg, inLevel, depth+1, entries...)
 	}
 }
 
 func (p *PackageLogger) LevelAt(l LogLevel) bool {
+	logger.Lock()
+	defer logger.Unlock()
 	return p.level >= l
 }
 
@@ -58,7 +60,7 @@ func (p *PackageLogger) Println(args ...interface{}) {
 }
 
 func (p *PackageLogger) Printf(format string, args ...interface{}) {
-	p.internalLog(calldepth, INFO, fmt.Sprintf(format, args...))
+	p.Logf(INFO, format, args...)
 }
 
 func (p *PackageLogger) Print(args ...interface{}) {
@@ -80,8 +82,7 @@ func (p *PackageLogger) Panic(args ...interface{}) {
 }
 
 func (p *PackageLogger) Fatalf(format string, args ...interface{}) {
-	s := fmt.Sprintf(format, args...)
-	p.internalLog(calldepth, CRITICAL, s)
+	p.Logf(CRITICAL, format, args...)
 	os.Exit(1)
 }
 
@@ -94,7 +95,7 @@ func (p *PackageLogger) Fatal(args ...interface{}) {
 // Error Functions
 
 func (p *PackageLogger) Errorf(format string, args ...interface{}) {
-	p.internalLog(calldepth, ERROR, fmt.Sprintf(format, args...))
+	p.Logf(ERROR, format, args...)
 }
 
 func (p *PackageLogger) Error(entries ...interface{}) {
@@ -104,7 +105,7 @@ func (p *PackageLogger) Error(entries ...interface{}) {
 // Warning Functions
 
 func (p *PackageLogger) Warningf(format string, args ...interface{}) {
-	p.internalLog(calldepth, WARNING, fmt.Sprintf(format, args...))
+	p.Logf(WARNING, format, args...)
 }
 
 func (p *PackageLogger) Warning(entries ...interface{}) {
@@ -114,7 +115,7 @@ func (p *PackageLogger) Warning(entries ...interface{}) {
 // Notice Functions
 
 func (p *PackageLogger) Noticef(format string, args ...interface{}) {
-	p.internalLog(calldepth, NOTICE, fmt.Sprintf(format, args...))
+	p.Logf(NOTICE, format, args...)
 }
 
 func (p *PackageLogger) Notice(entries ...interface{}) {
@@ -124,7 +125,7 @@ func (p *PackageLogger) Notice(entries ...interface{}) {
 // Info Functions
 
 func (p *PackageLogger) Infof(format string, args ...interface{}) {
-	p.internalLog(calldepth, INFO, fmt.Sprintf(format, args...))
+	p.Logf(INFO, format, args...)
 }
 
 func (p *PackageLogger) Info(entries ...interface{}) {
@@ -134,20 +135,32 @@ func (p *PackageLogger) Info(entries ...interface{}) {
 // Debug Functions
 
 func (p *PackageLogger) Debugf(format string, args ...interface{}) {
-	p.internalLog(calldepth, DEBUG, fmt.Sprintf(format, args...))
+	if p.level < DEBUG {
+		return
+	}
+	p.Logf(DEBUG, format, args...)
 }
 
 func (p *PackageLogger) Debug(entries ...interface{}) {
+	if p.level < DEBUG {
+		return
+	}
 	p.internalLog(calldepth, DEBUG, entries...)
 }
 
 // Trace Functions
 
 func (p *PackageLogger) Tracef(format string, args ...interface{}) {
-	p.internalLog(calldepth, TRACE, fmt.Sprintf(format, args...))
+	if p.level < TRACE {
+		return
+	}
+	p.Logf(TRACE, format, args...)
 }
 
 func (p *PackageLogger) Trace(entries ...interface{}) {
+	if p.level < TRACE {
+		return
+	}
 	p.internalLog(calldepth, TRACE, entries...)
 }
 

vendor/github.com/coreos/pkg/dlopen/dlopen.go

@@ -0,0 +1,82 @@
+// Copyright 2016 CoreOS, Inc.
+//
+// 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 dlopen provides some convenience functions to dlopen a library and
+// get its symbols.
+package dlopen
+
+// #cgo LDFLAGS: -ldl
+// #include <stdlib.h>
+// #include <dlfcn.h>
+import "C"
+import (
+	"errors"
+	"fmt"
+	"unsafe"
+)
+
+var ErrSoNotFound = errors.New("unable to open a handle to the library")
+
+// LibHandle represents an open handle to a library (.so)
+type LibHandle struct {
+	Handle  unsafe.Pointer
+	Libname string
+}
+
+// GetHandle tries to get a handle to a library (.so), attempting to access it
+// by the names specified in libs and returning the first that is successfully
+// opened. Callers are responsible for closing the handler. If no library can
+// be successfully opened, an error is returned.
+func GetHandle(libs []string) (*LibHandle, error) {
+	for _, name := range libs {
+		libname := C.CString(name)
+		defer C.free(unsafe.Pointer(libname))
+		handle := C.dlopen(libname, C.RTLD_LAZY)
+		if handle != nil {
+			h := &LibHandle{
+				Handle:  handle,
+				Libname: name,
+			}
+			return h, nil
+		}
+	}
+	return nil, ErrSoNotFound
+}
+
+// GetSymbolPointer takes a symbol name and returns a pointer to the symbol.
+func (l *LibHandle) GetSymbolPointer(symbol string) (unsafe.Pointer, error) {
+	sym := C.CString(symbol)
+	defer C.free(unsafe.Pointer(sym))
+
+	C.dlerror()
+	p := C.dlsym(l.Handle, sym)
+	e := C.dlerror()
+	if e != nil {
+		return nil, fmt.Errorf("error resolving symbol %q: %v", symbol, errors.New(C.GoString(e)))
+	}
+
+	return p, nil
+}
+
+// Close closes a LibHandle.
+func (l *LibHandle) Close() error {
+	C.dlerror()
+	C.dlclose(l.Handle)
+	e := C.dlerror()
+	if e != nil {
+		return fmt.Errorf("error closing %v: %v", l.Libname, errors.New(C.GoString(e)))
+	}
+
+	return nil
+}

vendor/github.com/coreos/pkg/dlopen/dlopen_example.go

@@ -0,0 +1,56 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// 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.
+//
+// +build linux
+
+package dlopen
+
+// #include <string.h>
+// #include <stdlib.h>
+//
+// int
+// my_strlen(void *f, const char *s)
+// {
+//   size_t (*strlen)(const char *);
+//
+//   strlen = (size_t (*)(const char *))f;
+//   return strlen(s);
+// }
+import "C"
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+func strlen(libs []string, s string) (int, error) {
+	h, err := GetHandle(libs)
+	if err != nil {
+		return -1, fmt.Errorf(`couldn't get a handle to the library: %v`, err)
+	}
+	defer h.Close()
+
+	f := "strlen"
+	cs := C.CString(s)
+	defer C.free(unsafe.Pointer(cs))
+
+	strlen, err := h.GetSymbolPointer(f)
+	if err != nil {
+		return -1, fmt.Errorf(`couldn't get symbol %q: %v`, f, err)
+	}
+
+	len := C.my_strlen(strlen, cs)
+
+	return int(len), nil
+}

vendor/github.com/coreos/pkg/httputil/cookie.go

@@ -0,0 +1,21 @@
+package httputil
+
+import (
+	"net/http"
+	"time"
+)
+
+// DeleteCookies effectively deletes all named cookies
+// by wiping all data and setting to expire immediately.
+func DeleteCookies(w http.ResponseWriter, cookieNames ...string) {
+	for _, n := range cookieNames {
+		c := &http.Cookie{
+			Name:    n,
+			Value:   "",
+			Path:    "/",
+			MaxAge:  -1,
+			Expires: time.Time{},
+		}
+		http.SetCookie(w, c)
+	}
+}