Make minio server compile on OpenBSD, NetBSD, Solaris (#3719)

buildscripts/checkdeps.sh

@@ -97,7 +97,7 @@ assert_is_supported_arch() {
 
 assert_is_supported_os() {
     case "${KNAME}" in
-        Linux | FreeBSD )
+        Linux | FreeBSD | OpenBSD | NetBSD | DragonFly )
             return
             ;;
         Darwin )
@@ -113,7 +113,7 @@ assert_is_supported_os() {
         *)
             echo "ERROR"
             echo "OS '${KNAME}' is not supported."
-            echo "Supported OS: [Linux, FreeBSD, Darwin]"
+            echo "Supported OS: [Linux, FreeBSD, OpenBSD, NetBSD, Darwin, DragonFly]"
             exit 1
     esac
 }

cmd/globals.go

@@ -51,6 +51,8 @@ const (
 	globalMinioDefaultOwnerID      = "minio"
 	globalMinioDefaultStorageClass = "STANDARD"
 	globalWindowsOSName            = "windows"
+	globalNetBSDOSName             = "netbsd"
+	globalSolarisOSName            = "solaris"
 	// Add new global values here.
 )
 

cmd/posix-list-dir-nix.go

@@ -1,4 +1,4 @@
-// +build linux darwin dragonfly freebsd netbsd openbsd
+// +build linux darwin freebsd netbsd openbsd
 
 /*
  * Minio Cloud Storage, (C) 2016 Minio, Inc.

cmd/posix-list-dir-others.go

@@ -1,4 +1,4 @@
-// +build !linux,!darwin,!openbsd,!freebsd,!netbsd,!dragonfly
+// +build !linux,!darwin,!openbsd,!freebsd,!netbsd
 
 /*
  * Minio Cloud Storage, (C) 2016 Minio, Inc.

cmd/posix-utils_nix.go

@@ -1,7 +1,7 @@
-// +build linux darwin dragonfly freebsd netbsd openbsd
+// +build linux darwin dragonfly freebsd netbsd openbsd solaris
 
 /*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ * Minio Cloud Storage, (C) 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

cmd/posix.go

@@ -153,11 +153,20 @@ func getDiskInfo(diskPath string) (di disk.Info, err error) {
 	return di, err
 }
 
+// List of operating systems where we ignore disk space
+// verification.
+var ignoreDiskFreeOS = []string{
+	globalWindowsOSName,
+	globalNetBSDOSName,
+	globalSolarisOSName,
+}
+
 // checkDiskFree verifies if disk path has sufficient minimum free disk space and files.
 func (s *posix) checkDiskFree() (err error) {
 	// We don't validate disk space or inode utilization on windows.
 	// Each windows calls to 'GetVolumeInformationW' takes around 3-5seconds.
-	if runtime.GOOS == globalWindowsOSName {
+	// And StatFS is not supported by Go for solaris and netbsd.
+	if contains(ignoreDiskFreeOS, runtime.GOOS) {
 		return nil
 	}
 

cmd/server-rlimit-nix.go

@@ -1,4 +1,4 @@
-//  +build !windows,!plan9
+//  +build !windows,!plan9,!openbsd
 
 /*
  * Minio Cloud Storage, (C) 2016 Minio, Inc.

cmd/server-rlimit-openbsd.go

@@ -0,0 +1,83 @@
+//  +build openbsd
+
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, 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 cmd
+
+import (
+	"syscall"
+
+	"github.com/minio/minio/pkg/sys"
+)
+
+// For all unixes we need to bump allowed number of open files to a
+// higher value than its usual default of '1024'. The reasoning is
+// that this value is too small for a server.
+func setMaxOpenFiles() error {
+	var rLimit syscall.Rlimit
+	err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+	if err != nil {
+		return err
+	}
+	// Set the current limit to Max, it is usually around 4096.
+	// TO increase this limit further user has to manually edit
+	// `/etc/security/limits.conf`
+	rLimit.Cur = rLimit.Max
+	return syscall.Setrlimit(syscall.RLIMIT_NOFILE, &rLimit)
+}
+
+// Set max memory used by minio as a process, this value is usually
+// set to 'unlimited' but we need to validate additionally to verify
+// if any hard limit is set by the user, in such a scenario would need
+// to reset the global max cache size to be 80% of the hardlimit set
+// by the user. This is done to honor the system limits and not crash.
+func setMaxMemory() error {
+	var rLimit syscall.Rlimit
+	err := syscall.Getrlimit(syscall.RLIMIT_DATA, &rLimit)
+	if err != nil {
+		return err
+	}
+	// Set the current limit to Max, it is default 'unlimited'.
+	// TO decrease this limit further user has to manually edit
+	// `/etc/security/limits.conf`
+	rLimit.Cur = rLimit.Max
+	err = syscall.Setrlimit(syscall.RLIMIT_DATA, &rLimit)
+	if err != nil {
+		return err
+	}
+	err = syscall.Getrlimit(syscall.RLIMIT_DATA, &rLimit)
+	if err != nil {
+		return err
+	}
+	// Validate if rlimit memory is set to lower
+	// than max cache size. Then we should use such value.
+	if uint64(rLimit.Cur) < globalMaxCacheSize {
+		globalMaxCacheSize = uint64(float64(50*rLimit.Cur) / 100)
+	}
+
+	// Make sure globalMaxCacheSize is less than RAM size.
+	stats, err := sys.GetStats()
+	if err != nil && err != sys.ErrNotImplemented {
+		return err
+	}
+	// If TotalRAM is >= minRAMSize we proceed to enable cache.
+	// cache is always 50% of the totalRAM.
+	if err == nil && stats.TotalRAM >= minRAMSize {
+		globalMaxCacheSize = uint64(float64(50*stats.TotalRAM) / 100)
+	}
+	return nil
+}

pkg/disk/disk.go

@@ -27,3 +27,11 @@ type Info struct {
 	Ffree  int64
 	FSType string
 }
+
+func b2s(bs []int8) string {
+	b := make([]byte, len(bs))
+	for i, v := range bs {
+		b[i] = byte(v)
+	}
+	return string(b)
+}

pkg/disk/disk_test.go

@@ -1,5 +1,7 @@
+// +build !netbsd,!solaris
+
 /*
- * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ * Minio Cloud Storage, (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

pkg/disk/stat_bsd.go

@@ -1,7 +1,7 @@
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin freebsd dragonfly
 
 /*
- * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ * Minio Cloud Storage, (C) 2015, 2016, 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,9 +34,6 @@ func GetInfo(path string) (info Info, err error) {
 	info.Free = int64(s.Bsize) * int64(s.Bavail)
 	info.Files = int64(s.Files)
 	info.Ffree = int64(s.Ffree)
-	info.FSType, err = getFSType(path)
-	if err != nil {
-		return Info{}, err
-	}
+	info.FSType = getFSType(s.Fstypename)
 	return info, nil
 }

pkg/disk/stat_fallback.go

@@ -0,0 +1,24 @@
+// +build netbsd solaris
+
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, 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 disk
+
+// GetInfo returns total and free bytes available in a directory, e.g. `/`.
+func GetInfo(path string) (info Info, err error) {
+	return Info{}, nil
+}

pkg/disk/stat_linux.go

@@ -0,0 +1,39 @@
+// +build linux
+
+/*
+ * Minio Cloud Storage, (C) 2015, 2016, 2017 Minio, 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 disk
+
+import (
+	"syscall"
+)
+
+// GetInfo returns total and free bytes available in a directory, e.g. `/`.
+func GetInfo(path string) (info Info, err error) {
+	s := syscall.Statfs_t{}
+	err = syscall.Statfs(path, &s)
+	if err != nil {
+		return Info{}, err
+	}
+	info = Info{}
+	info.Total = int64(s.Bsize) * int64(s.Blocks)
+	info.Free = int64(s.Bsize) * int64(s.Bavail)
+	info.Files = int64(s.Files)
+	info.Ffree = int64(s.Ffree)
+	info.FSType = getFSType(int64(s.Type))
+	return info, nil
+}

pkg/disk/stat_openbsd.go

@@ -0,0 +1,39 @@
+// +build openbsd
+
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, 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 disk
+
+import (
+	"syscall"
+)
+
+// GetInfo returns total and free bytes available in a directory, e.g. `/`.
+func GetInfo(path string) (info Info, err error) {
+	s := syscall.Statfs_t{}
+	err = syscall.Statfs(path, &s)
+	if err != nil {
+		return Info{}, err
+	}
+	info = Info{}
+	info.Total = int64(s.F_bsize) * int64(s.F_blocks)
+	info.Free = int64(s.F_bsize) * int64(s.F_bavail)
+	info.Files = int64(s.F_files)
+	info.Ffree = int64(s.F_ffree)
+	info.FSType = getFSType(s.F_fstypename)
+	return info, nil
+}

pkg/disk/type_bsd.go

@@ -1,7 +1,7 @@
-// +build freebsd
+// +build darwin freebsd dragonfly openbsd
 
 /*
- * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,27 +18,7 @@
 
 package disk
 
-import (
-	"strconv"
-	"syscall"
-)
-
-// fsType2StringMap - list of filesystems supported by donut on linux
-var fsType2StringMap = map[string]string{
-	"35": "UFS",
-}
-
 // getFSType returns the filesystem type of the underlying mounted filesystem
-func getFSType(path string) (string, error) {
-	s := syscall.Statfs_t{}
-	err := syscall.Statfs(path, &s)
-	if err != nil {
-		return "", err
-	}
-	fsTypeHex := strconv.FormatInt(int64(s.Type), 16)
-	fsTypeString, ok := fsType2StringMap[fsTypeHex]
-	if ok == false {
-		return "UNKNOWN", nil
-	}
-	return fsTypeString, nil
+func getFSType(fstype [16]int8) string {
+	return b2s(fstype[:])
 }

pkg/disk/type_darwin.go

@@ -18,10 +18,7 @@
 
 package disk
 
-import (
-	"strconv"
-	"syscall"
-)
+import "strconv"
 
 // fsType2StrinMap - list of filesystems supported by donut
 var fsType2StringMap = map[string]string{
@@ -29,16 +26,11 @@ var fsType2StringMap = map[string]string{
 }
 
 // getFSType returns the filesystem type of the underlying mounted filesystem
-func getFSType(path string) (string, error) {
-	s := syscall.Statfs_t{}
-	err := syscall.Statfs(path, &s)
-	if err != nil {
-		return "", err
-	}
-	fsTypeHex := strconv.FormatUint(uint64(s.Type), 16)
+func getFSType(ftype int64) string {
+	fsTypeHex := strconv.FormatInt(ftype, 16)
 	fsTypeString, ok := fsType2StringMap[fsTypeHex]
 	if !ok {
-		return "UNKNOWN", nil
+		return "UNKNOWN"
 	}
-	return fsTypeString, nil
+	return fsTypeString
 }

pkg/disk/type_linux.go

@@ -1,7 +1,7 @@
 // +build linux
 
 /*
- * Minio Cloud Storage, (C) 2015 Minio, Inc.
+ * Minio Cloud Storage, (C) 2017 Minio, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,10 +18,7 @@
 
 package disk
 
-import (
-	"strconv"
-	"syscall"
-)
+import "strconv"
 
 // fsType2StringMap - list of filesystems supported by donut on linux
 var fsType2StringMap = map[string]string{
@@ -40,16 +37,11 @@ var fsType2StringMap = map[string]string{
 }
 
 // getFSType returns the filesystem type of the underlying mounted filesystem
-func getFSType(path string) (string, error) {
-	s := syscall.Statfs_t{}
-	err := syscall.Statfs(path, &s)
-	if err != nil {
-		return "", err
-	}
-	fsTypeHex := strconv.FormatInt(int64(s.Type), 16)
+func getFSType(ftype int64) string {
+	fsTypeHex := strconv.FormatInt(ftype, 16)
 	fsTypeString, ok := fsType2StringMap[fsTypeHex]
 	if ok == false {
-		return "UNKNOWN", nil
+		return "UNKNOWN"
 	}
-	return fsTypeString, nil
+	return fsTypeString
 }

pkg/lock/lock_solaris.go

@@ -0,0 +1,83 @@
+// +build solaris
+
+/*
+ * Minio Cloud Storage, (C) 2017 Minio, 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 lock
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+)
+
+// LockedOpenFile - initializes a new lock and protects
+// the file from concurrent access across mount points.
+// This implementation doesn't support all the open
+// flags and shouldn't be considered as replacement
+// for os.OpenFile().
+func LockedOpenFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
+	var lock syscall.Flock_t
+	lock.Start = 0
+	lock.Len = 0
+	lock.Pid = 0
+
+	var lockType int16
+	switch flag {
+	case syscall.O_RDONLY:
+		lockType = syscall.F_RDLCK
+	case syscall.O_WRONLY:
+		fallthrough
+	case syscall.O_RDWR:
+		fallthrough
+	case syscall.O_WRONLY | syscall.O_CREAT:
+		fallthrough
+	case syscall.O_RDWR | syscall.O_CREAT:
+		lockType = syscall.F_WRLCK
+	default:
+		return nil, fmt.Errorf("Unsupported flag (%d)", flag)
+	}
+
+	lock.Type = lockType
+	lock.Whence = 0
+
+	f, err := os.OpenFile(path, flag, perm)
+	if err != nil {
+		return nil, err
+	}
+
+	if err = syscall.FcntlFlock(f.Fd(), syscall.F_SETLKW, &lock); err != nil {
+		f.Close()
+		return nil, err
+	}
+
+	st, err := os.Stat(path)
+	if err != nil {
+		f.Close()
+		return nil, err
+	}
+
+	if st.IsDir() {
+		f.Close()
+		return nil, &os.PathError{
+			Op:   "open",
+			Path: path,
+			Err:  syscall.EISDIR,
+		}
+	}
+
+	return &LockedFile{f}, nil
+}

vendor/github.com/fatih/color/README.md

@@ -56,6 +56,16 @@ whiteBackground := red.Add(color.BgWhite)
 whiteBackground.Println("Red text with white background.")
 ```
 
+### Use your own output (io.Writer)
+
+```go
+// Use your own io.Writer output
+color.New(color.FgBlue).Fprintln(myWriter, "blue color!")
+
+blue := color.New(color.FgBlue)
+blue.Fprint(writer, "This will print text in blue.")
+```
+
 ### Custom print functions (PrintFunc)
 
 ```go
@@ -69,6 +79,17 @@ notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
 notice("Don't forget this...")
 ```
 
+### Custom fprint functions (FprintFunc)
+
+```go
+blue := color.New(FgBlue).FprintfFunc()
+blue(myWriter, "important notice: %s", stars)
+
+// Mix up with multiple attributes
+success := color.New(color.Bold, color.FgGreen).FprintlnFunc()
+success(myWriter, "Don't forget this...")
+```
+
 ### Insert into noncolor strings (SprintFunc)
 
 ```go
@@ -81,8 +102,8 @@ info := color.New(color.FgWhite, color.BgGreen).SprintFunc()
 fmt.Printf("This %s rocks!\n", info("package"))
 
 // Use helper functions
-fmt.Printf("This", color.RedString("warning"), "should be not neglected.")
-fmt.Printf(color.GreenString("Info:"), "an important message." )
+fmt.Println("This", color.RedString("warning"), "should be not neglected.")
+fmt.Printf("%v %v\n", color.GreenString("Info:"), "an important message.")
 
 // Windows supported too! Just don't forget to change the output to color.Output
 fmt.Fprintf(color.Output, "Windows support: %s", color.GreenString("PASS"))

vendor/github.com/fatih/color/color.go

@@ -2,19 +2,32 @@ package color
 
 import (
 	"fmt"
+	"io"
 	"os"
 	"strconv"
 	"strings"
+	"sync"
 
 	"github.com/mattn/go-colorable"
 	"github.com/mattn/go-isatty"
 )
 
-// NoColor defines if the output is colorized or not. It's dynamically set to
-// false or true based on the stdout's file descriptor referring to a terminal
-// or not. This is a global option and affects all colors. For more control
-// over each color block use the methods DisableColor() individually.
-var NoColor = !isatty.IsTerminal(os.Stdout.Fd())
+var (
+	// NoColor defines if the output is colorized or not. It's dynamically set to
+	// false or true based on the stdout's file descriptor referring to a terminal
+	// or not. This is a global option and affects all colors. For more control
+	// over each color block use the methods DisableColor() individually.
+	NoColor = !isatty.IsTerminal(os.Stdout.Fd()) || os.Getenv("TERM") == "dumb"
+
+	// Output defines the standard output of the print functions. By default
+	// os.Stdout is used.
+	Output = colorable.NewColorableStdout()
+
+	// colorsCache is used to reduce the count of created Color objects and
+	// allows to reuse already created objects with required Attribute.
+	colorsCache   = make(map[Attribute]*Color)
+	colorsCacheMu sync.Mutex // protects colorsCache
+)
 
 // Color defines a custom color object which is defined by SGR parameters.
 type Color struct {
@@ -132,6 +145,27 @@ func (c *Color) unset() {
 	Unset()
 }
 
+func (c *Color) setWriter(w io.Writer) *Color {
+	if c.isNoColorSet() {
+		return c
+	}
+
+	fmt.Fprintf(w, c.format())
+	return c
+}
+
+func (c *Color) unsetWriter(w io.Writer) {
+	if c.isNoColorSet() {
+		return
+	}
+
+	if NoColor {
+		return
+	}
+
+	fmt.Fprintf(w, "%s[%dm", escape, Reset)
+}
+
 // Add is used to chain SGR parameters. Use as many as parameters to combine
 // and create custom color objects. Example: Add(color.FgRed, color.Underline).
 func (c *Color) Add(value ...Attribute) *Color {
@@ -145,9 +179,17 @@ func (c *Color) prepend(value Attribute) {
 	c.params[0] = value
 }
 
-// Output defines the standard output of the print functions. By default
-// os.Stdout is used.
-var Output = colorable.NewColorableStdout()
+// Fprint formats using the default formats for its operands and writes to w.
+// Spaces are added between operands when neither is a string.
+// It returns the number of bytes written and any write error encountered.
+// On Windows, users should wrap w with colorable.NewColorable() if w is of
+// type *os.File.
+func (c *Color) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
+	c.setWriter(w)
+	defer c.unsetWriter(w)
+
+	return fmt.Fprint(w, a...)
+}
 
 // Print formats using the default formats for its operands and writes to
 // standard output. Spaces are added between operands when neither is a
@@ -161,6 +203,17 @@ func (c *Color) Print(a ...interface{}) (n int, err error) {
 	return fmt.Fprint(Output, a...)
 }
 
+// Fprintf formats according to a format specifier and writes to w.
+// It returns the number of bytes written and any write error encountered.
+// On Windows, users should wrap w with colorable.NewColorable() if w is of
+// type *os.File.
+func (c *Color) Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
+	c.setWriter(w)
+	defer c.unsetWriter(w)
+
+	return fmt.Fprintf(w, format, a...)
+}
+
 // Printf formats according to a format specifier and writes to standard output.
 // It returns the number of bytes written and any write error encountered.
 // This is the standard fmt.Printf() method wrapped with the given color.
@@ -171,6 +224,17 @@ func (c *Color) Printf(format string, a ...interface{}) (n int, err error) {
 	return fmt.Fprintf(Output, format, a...)
 }
 
+// Fprintln formats using the default formats for its operands and writes to w.
+// Spaces are always added between operands and a newline is appended.
+// On Windows, users should wrap w with colorable.NewColorable() if w is of
+// type *os.File.
+func (c *Color) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
+	c.setWriter(w)
+	defer c.unsetWriter(w)
+
+	return fmt.Fprintln(w, a...)
+}
+
 // Println formats using the default formats for its operands and writes to
 // standard output. Spaces are always added between operands and a newline is
 // appended. It returns the number of bytes written and any write error
@@ -183,27 +247,57 @@ func (c *Color) Println(a ...interface{}) (n int, err error) {
 	return fmt.Fprintln(Output, a...)
 }
 
+// FprintFunc returns a new function that prints the passed arguments as
+// colorized with color.Fprint().
+func (c *Color) FprintFunc() func(w io.Writer, a ...interface{}) {
+	return func(w io.Writer, a ...interface{}) {
+		c.Fprint(w, a...)
+	}
+}
+
 // PrintFunc returns a new function that prints the passed arguments as
 // colorized with color.Print().
 func (c *Color) PrintFunc() func(a ...interface{}) {
-	return func(a ...interface{}) { c.Print(a...) }
+	return func(a ...interface{}) {
+		c.Print(a...)
+	}
+}
+
+// FprintfFunc returns a new function that prints the passed arguments as
+// colorized with color.Fprintf().
+func (c *Color) FprintfFunc() func(w io.Writer, format string, a ...interface{}) {
+	return func(w io.Writer, format string, a ...interface{}) {
+		c.Fprintf(w, format, a...)
+	}
 }
 
 // PrintfFunc returns a new function that prints the passed arguments as
 // colorized with color.Printf().
 func (c *Color) PrintfFunc() func(format string, a ...interface{}) {
-	return func(format string, a ...interface{}) { c.Printf(format, a...) }
+	return func(format string, a ...interface{}) {
+		c.Printf(format, a...)
+	}
+}
+
+// FprintlnFunc returns a new function that prints the passed arguments as
+// colorized with color.Fprintln().
+func (c *Color) FprintlnFunc() func(w io.Writer, a ...interface{}) {
+	return func(w io.Writer, a ...interface{}) {
+		c.Fprintln(w, a...)
+	}
 }
 
 // PrintlnFunc returns a new function that prints the passed arguments as
 // colorized with color.Println().
 func (c *Color) PrintlnFunc() func(a ...interface{}) {
-	return func(a ...interface{}) { c.Println(a...) }
+	return func(a ...interface{}) {
+		c.Println(a...)
+	}
 }
 
 // SprintFunc returns a new function that returns colorized strings for the
 // given arguments with fmt.Sprint(). Useful to put into or mix into other
-// string. Windows users should use this in conjuction with color.Output, example:
+// string. Windows users should use this in conjunction with color.Output, example:
 //
 //	put := New(FgYellow).SprintFunc()
 //	fmt.Fprintf(color.Output, "This is a %s", put("warning"))
@@ -215,7 +309,7 @@ func (c *Color) SprintFunc() func(a ...interface{}) string {
 
 // SprintfFunc returns a new function that returns colorized strings for the
 // given arguments with fmt.Sprintf(). Useful to put into or mix into other
-// string. Windows users should use this in conjuction with color.Output.
+// string. Windows users should use this in conjunction with color.Output.
 func (c *Color) SprintfFunc() func(format string, a ...interface{}) string {
 	return func(format string, a ...interface{}) string {
 		return c.wrap(fmt.Sprintf(format, a...))
@@ -224,7 +318,7 @@ func (c *Color) SprintfFunc() func(format string, a ...interface{}) string {
 
 // SprintlnFunc returns a new function that returns colorized strings for the
 // given arguments with fmt.Sprintln(). Useful to put into or mix into other
-// string. Windows users should use this in conjuction with color.Output.
+// string. Windows users should use this in conjunction with color.Output.
 func (c *Color) SprintlnFunc() func(a ...interface{}) string {
 	return func(a ...interface{}) string {
 		return c.wrap(fmt.Sprintln(a...))
@@ -267,7 +361,7 @@ func (c *Color) DisableColor() {
 	c.noColor = boolPtr(true)
 }
 
-// EnableColor enables the color output. Use it in conjuction with
+// EnableColor enables the color output. Use it in conjunction with
 // DisableColor(). Otherwise this method has no side effects.
 func (c *Color) EnableColor() {
 	c.noColor = boolPtr(false)
@@ -312,91 +406,105 @@ func boolPtr(v bool) *bool {
 	return &v
 }
 
-// Black is an convenient helper function to print with black foreground. A
-// newline is appended to format by default.
-func Black(format string, a ...interface{}) { printColor(format, FgBlack, a...) }
+func getCachedColor(p Attribute) *Color {
+	colorsCacheMu.Lock()
+	defer colorsCacheMu.Unlock()
 
-// Red is an convenient helper function to print with red foreground. A
-// newline is appended to format by default.
-func Red(format string, a ...interface{}) { printColor(format, FgRed, a...) }
+	c, ok := colorsCache[p]
+	if !ok {
+		c = New(p)
+		colorsCache[p] = c
+	}
 
-// Green is an convenient helper function to print with green foreground. A
-// newline is appended to format by default.
-func Green(format string, a ...interface{}) { printColor(format, FgGreen, a...) }
+	return c
+}
 
-// Yellow is an convenient helper function to print with yellow foreground.
-// A newline is appended to format by default.
-func Yellow(format string, a ...interface{}) { printColor(format, FgYellow, a...) }
+func colorPrint(format string, p Attribute, a ...interface{}) {
+	c := getCachedColor(p)
 
-// Blue is an convenient helper function to print with blue foreground. A
-// newline is appended to format by default.
-func Blue(format string, a ...interface{}) { printColor(format, FgBlue, a...) }
-
-// Magenta is an convenient helper function to print with magenta foreground.
-// A newline is appended to format by default.
-func Magenta(format string, a ...interface{}) { printColor(format, FgMagenta, a...) }
-
-// Cyan is an convenient helper function to print with cyan foreground. A
-// newline is appended to format by default.
-func Cyan(format string, a ...interface{}) { printColor(format, FgCyan, a...) }
-
-// White is an convenient helper function to print with white foreground. A
-// newline is appended to format by default.
-func White(format string, a ...interface{}) { printColor(format, FgWhite, a...) }
-
-func printColor(format string, p Attribute, a ...interface{}) {
 	if !strings.HasSuffix(format, "\n") {
 		format += "\n"
 	}
 
-	c := &Color{params: []Attribute{p}}
-	c.Printf(format, a...)
+	if len(a) == 0 {
+		c.Print(format)
+	} else {
+		c.Printf(format, a...)
+	}
 }
 
+func colorString(format string, p Attribute, a ...interface{}) string {
+	c := getCachedColor(p)
+
+	if len(a) == 0 {
+		return c.SprintFunc()(format)
+	}
+
+	return c.SprintfFunc()(format, a...)
+}
+
+// Black is an convenient helper function to print with black foreground. A
+// newline is appended to format by default.
+func Black(format string, a ...interface{}) { colorPrint(format, FgBlack, a...) }
+
+// Red is an convenient helper function to print with red foreground. A
+// newline is appended to format by default.
+func Red(format string, a ...interface{}) { colorPrint(format, FgRed, a...) }
+
+// Green is an convenient helper function to print with green foreground. A
+// newline is appended to format by default.
+func Green(format string, a ...interface{}) { colorPrint(format, FgGreen, a...) }
+
+// Yellow is an convenient helper function to print with yellow foreground.
+// A newline is appended to format by default.
+func Yellow(format string, a ...interface{}) { colorPrint(format, FgYellow, a...) }
+
+// Blue is an convenient helper function to print with blue foreground. A
+// newline is appended to format by default.
+func Blue(format string, a ...interface{}) { colorPrint(format, FgBlue, a...) }
+
+// Magenta is an convenient helper function to print with magenta foreground.
+// A newline is appended to format by default.
+func Magenta(format string, a ...interface{}) { colorPrint(format, FgMagenta, a...) }
+
+// Cyan is an convenient helper function to print with cyan foreground. A
+// newline is appended to format by default.
+func Cyan(format string, a ...interface{}) { colorPrint(format, FgCyan, a...) }
+
+// White is an convenient helper function to print with white foreground. A
+// newline is appended to format by default.
+func White(format string, a ...interface{}) { colorPrint(format, FgWhite, a...) }
+
 // BlackString is an convenient helper function to return a string with black
 // foreground.
-func BlackString(format string, a ...interface{}) string {
-	return New(FgBlack).SprintfFunc()(format, a...)
-}
+func BlackString(format string, a ...interface{}) string { return colorString(format, FgBlack, a...) }
 
 // RedString is an convenient helper function to return a string with red
 // foreground.
-func RedString(format string, a ...interface{}) string {
-	return New(FgRed).SprintfFunc()(format, a...)
-}
+func RedString(format string, a ...interface{}) string { return colorString(format, FgRed, a...) }
 
 // GreenString is an convenient helper function to return a string with green
 // foreground.
-func GreenString(format string, a ...interface{}) string {
-	return New(FgGreen).SprintfFunc()(format, a...)
-}
+func GreenString(format string, a ...interface{}) string { return colorString(format, FgGreen, a...) }
 
 // YellowString is an convenient helper function to return a string with yellow
 // foreground.
-func YellowString(format string, a ...interface{}) string {
-	return New(FgYellow).SprintfFunc()(format, a...)
-}
+func YellowString(format string, a ...interface{}) string { return colorString(format, FgYellow, a...) }
 
 // BlueString is an convenient helper function to return a string with blue
 // foreground.
-func BlueString(format string, a ...interface{}) string {
-	return New(FgBlue).SprintfFunc()(format, a...)
-}
+func BlueString(format string, a ...interface{}) string { return colorString(format, FgBlue, a...) }
 
 // MagentaString is an convenient helper function to return a string with magenta
 // foreground.
 func MagentaString(format string, a ...interface{}) string {
-	return New(FgMagenta).SprintfFunc()(format, a...)
+	return colorString(format, FgMagenta, a...)
 }
 
 // CyanString is an convenient helper function to return a string with cyan
 // foreground.
-func CyanString(format string, a ...interface{}) string {
-	return New(FgCyan).SprintfFunc()(format, a...)
-}
+func CyanString(format string, a ...interface{}) string { return colorString(format, FgCyan, a...) }
 
 // WhiteString is an convenient helper function to return a string with white
 // foreground.
-func WhiteString(format string, a ...interface{}) string {
-	return New(FgWhite).SprintfFunc()(format, a...)
-}
+func WhiteString(format string, a ...interface{}) string { return colorString(format, FgWhite, a...) }

vendor/github.com/fatih/color/doc.go

@@ -37,6 +37,11 @@ separate color object.
     whiteBackground := red.Add(color.BgWhite)
     whiteBackground.Println("Red text with White background.")
 
+    // Use your own io.Writer output
+    color.New(color.FgBlue).Fprintln(myWriter, "blue color!")
+
+    blue := color.New(color.FgBlue)
+    blue.Fprint(myWriter, "This will print text in blue.")
 
 You can create PrintXxx functions to simplify even more:
 
@@ -49,6 +54,15 @@ You can create PrintXxx functions to simplify even more:
     notice := color.New(color.Bold, color.FgGreen).PrintlnFunc()
     notice("don't forget this...")
 
+You can also FprintXxx functions to pass your own io.Writer:
+
+    blue := color.New(FgBlue).FprintfFunc()
+    blue(myWriter, "important notice: %s", stars)
+
+    // Mix up with multiple attributes
+    success := color.New(color.Bold, color.FgGreen).FprintlnFunc()
+    success(myWriter, don't forget this...")
+
 
 Or create SprintXxx functions to mix strings with other non-colorized strings:
 

vendor/github.com/mattn/go-isatty/isatty_appengine.go

@@ -0,0 +1,9 @@
+// +build appengine
+
+package isatty
+
+// IsTerminal returns true if the file descriptor is terminal which
+// is always false on on appengine classic which is a sandboxed PaaS.
+func IsTerminal(fd uintptr) bool {
+	return false
+}

vendor/github.com/mattn/go-isatty/isatty_bsd.go

@@ -1,4 +1,4 @@
-// +build darwin freebsd openbsd netbsd
+// +build darwin freebsd openbsd netbsd dragonfly
 // +build !appengine
 
 package isatty

vendor/vendor.json

@@ -57,9 +57,10 @@
 			"revisionTime": "2015-12-24T06:54:52+02:00"
 		},
 		{
+			"checksumSHA1": "XEBl9iQQvfXNlwCSzyAOCqAlYEA=",
 			"path": "github.com/fatih/color",
-			"revision": "87d4004f2ab62d0d255e0a38f1680aa534549fe3",
-			"revisionTime": "2016-06-10T14:06:02+03:00"
+			"revision": "42c364ba490082e4815b5222728711b3440603eb",
+			"revisionTime": "2017-01-13T15:16:12Z"
 		},
 		{
 			"checksumSHA1": "3yco0089CSJ4qbyUccpbDC2+dPg=",
@@ -150,9 +151,10 @@
 			"revisionTime": "2016-06-03T00:08:27+09:00"
 		},
 		{
+			"checksumSHA1": "xZuhljnmBysJPta/lMyYmJdujCg=",
 			"path": "github.com/mattn/go-isatty",
-			"revision": "56b76bdf51f7708750eac80fa38b952bb9f32639",
-			"revisionTime": "2015-12-11T09:06:21+09:00"
+			"revision": "30a891c33c7cde7b02a981314b4228ec99380cca",
+			"revisionTime": "2016-11-23T14:36:37Z"
 		},
 		{
 			"checksumSHA1": "4gphCNVXIjp5ytz3+S3SD3Dp948=",