TUN-528: Move cloudflared into a separate repo

vendor/gopkg.in/urfave/cli.v2/altsrc/altsrc.go

@@ -0,0 +1,3 @@
+package altsrc
+
+//go:generate python ../generate-flag-types altsrc -i ../flag-types.json -o flag_generated.go

vendor/gopkg.in/urfave/cli.v2/altsrc/flag.go

@@ -0,0 +1,262 @@
+package altsrc
+
+import (
+	"fmt"
+	"path/filepath"
+	"strconv"
+	"syscall"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+// FlagInputSourceExtension is an extension interface of cli.Flag that
+// allows a value to be set on the existing parsed flags.
+type FlagInputSourceExtension interface {
+	cli.Flag
+	ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error
+}
+
+// ApplyInputSourceValues iterates over all provided flags and
+// executes ApplyInputSourceValue on flags implementing the
+// FlagInputSourceExtension interface to initialize these flags
+// to an alternate input source.
+func ApplyInputSourceValues(context *cli.Context, inputSourceContext InputSourceContext, flags []cli.Flag) error {
+	for _, f := range flags {
+		inputSourceExtendedFlag, isType := f.(FlagInputSourceExtension)
+		if isType {
+			err := inputSourceExtendedFlag.ApplyInputSourceValue(context, inputSourceContext)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
+
+// InitInputSource is used to to setup an InputSourceContext on a cli.Command Before method. It will create a new
+// input source based on the func provided. If there is no error it will then apply the new input source to any flags
+// that are supported by the input source
+func InitInputSource(flags []cli.Flag, createInputSource func() (InputSourceContext, error)) cli.BeforeFunc {
+	return func(context *cli.Context) error {
+		inputSource, err := createInputSource()
+		if err != nil {
+			return fmt.Errorf("Unable to create input source: inner error: \n'%v'", err.Error())
+		}
+
+		return ApplyInputSourceValues(context, inputSource, flags)
+	}
+}
+
+// InitInputSourceWithContext is used to to setup an InputSourceContext on a cli.Command Before method. It will create a new
+// input source based on the func provided with potentially using existing cli.Context values to initialize itself. If there is
+// no error it will then apply the new input source to any flags that are supported by the input source
+func InitInputSourceWithContext(flags []cli.Flag, createInputSource func(context *cli.Context) (InputSourceContext, error)) cli.BeforeFunc {
+	return func(context *cli.Context) error {
+		inputSource, err := createInputSource(context)
+		if err != nil {
+			return fmt.Errorf("Unable to create input source with context: inner error: \n'%v'", err.Error())
+		}
+
+		return ApplyInputSourceValues(context, inputSource, flags)
+	}
+}
+
+// ApplyInputSourceValue applies a generic value to the flagSet if required
+func (f *GenericFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !context.IsSet(f.Name) && !isEnvVarSet(f.EnvVars) {
+			value, err := isc.Generic(f.GenericFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value != nil {
+				for _, name := range f.Names() {
+					f.set.Set(name, value.String())
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
+// ApplyInputSourceValue applies a StringSlice value to the flagSet if required
+func (f *StringSliceFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !context.IsSet(f.Name) && !isEnvVarSet(f.EnvVars) {
+			value, err := isc.StringSlice(f.StringSliceFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value != nil {
+				var sliceValue cli.StringSlice = *(cli.NewStringSlice(value...))
+				for _, name := range f.Names() {
+					underlyingFlag := f.set.Lookup(name)
+					if underlyingFlag != nil {
+						underlyingFlag.Value = &sliceValue
+					}
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a IntSlice value if required
+func (f *IntSliceFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !context.IsSet(f.Name) && !isEnvVarSet(f.EnvVars) {
+			value, err := isc.IntSlice(f.IntSliceFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value != nil {
+				var sliceValue cli.IntSlice = *(cli.NewIntSlice(value...))
+				for _, name := range f.Names() {
+					underlyingFlag := f.set.Lookup(name)
+					if underlyingFlag != nil {
+						underlyingFlag.Value = &sliceValue
+					}
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a Bool value to the flagSet if required
+func (f *BoolFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !context.IsSet(f.Name) && !isEnvVarSet(f.EnvVars) {
+			value, err := isc.Bool(f.BoolFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value {
+				for _, name := range f.Names() {
+					f.set.Set(name, strconv.FormatBool(value))
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a String value to the flagSet if required
+func (f *StringFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !(context.IsSet(f.Name) || isEnvVarSet(f.EnvVars)) {
+			value, err := isc.String(f.StringFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value != "" {
+				for _, name := range f.Names() {
+					f.set.Set(name, value)
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a Path value to the flagSet if required
+func (f *PathFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !(context.IsSet(f.Name) || isEnvVarSet(f.EnvVars)) {
+			value, err := isc.String(f.PathFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value != "" {
+				for _, name := range f.Names() {
+
+					if !filepath.IsAbs(value) && isc.Source() != "" {
+						basePathAbs, err := filepath.Abs(isc.Source())
+						if err != nil {
+							return err
+						}
+
+						value = filepath.Join(filepath.Dir(basePathAbs), value)
+					}
+
+					f.set.Set(name, value)
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a int value to the flagSet if required
+func (f *IntFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !(context.IsSet(f.Name) || isEnvVarSet(f.EnvVars)) {
+			value, err := isc.Int(f.IntFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value > 0 {
+				for _, name := range f.Names() {
+					f.set.Set(name, strconv.FormatInt(int64(value), 10))
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a Duration value to the flagSet if required
+func (f *DurationFlag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !(context.IsSet(f.Name) || isEnvVarSet(f.EnvVars)) {
+			value, err := isc.Duration(f.DurationFlag.Name)
+			if err != nil {
+				return err
+			}
+			if value > 0 {
+				for _, name := range f.Names() {
+					f.set.Set(name, value.String())
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// ApplyInputSourceValue applies a Float64 value to the flagSet if required
+func (f *Float64Flag) ApplyInputSourceValue(context *cli.Context, isc InputSourceContext) error {
+	if f.set != nil {
+		if !(context.IsSet(f.Name) || isEnvVarSet(f.EnvVars)) {
+			value, err := isc.Float64(f.Float64Flag.Name)
+			if err != nil {
+				return err
+			}
+			if value > 0 {
+				floatStr := float64ToString(value)
+				for _, name := range f.Names() {
+					f.set.Set(name, floatStr)
+				}
+			}
+		}
+	}
+	return nil
+}
+
+func isEnvVarSet(envVars []string) bool {
+	for _, envVar := range envVars {
+		if _, ok := syscall.Getenv(envVar); ok {
+			// TODO: Can't use this for bools as
+			// set means that it was true or false based on
+			// Bool flag type, should work for other types
+			return true
+		}
+	}
+
+	return false
+}
+
+func float64ToString(f float64) string {
+	return fmt.Sprintf("%v", f)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/flag_generated.go

@@ -0,0 +1,373 @@
+package altsrc
+
+import (
+	"flag"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+// WARNING: This file is generated!
+
+// BoolFlag is the flag type that wraps cli.BoolFlag to allow
+// for other values to be specified
+type BoolFlag struct {
+	*cli.BoolFlag
+	set *flag.FlagSet
+}
+
+// NewBoolFlag creates a new BoolFlag
+func NewBoolFlag(fl *cli.BoolFlag) *BoolFlag {
+	return &BoolFlag{BoolFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped BoolFlag.Apply
+func (f *BoolFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.BoolFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped BoolFlag.ApplyWithError
+func (f *BoolFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.BoolFlag.ApplyWithError(set)
+}
+
+// DurationFlag is the flag type that wraps cli.DurationFlag to allow
+// for other values to be specified
+type DurationFlag struct {
+	*cli.DurationFlag
+	set *flag.FlagSet
+}
+
+// NewDurationFlag creates a new DurationFlag
+func NewDurationFlag(fl *cli.DurationFlag) *DurationFlag {
+	return &DurationFlag{DurationFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped DurationFlag.Apply
+func (f *DurationFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.DurationFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped DurationFlag.ApplyWithError
+func (f *DurationFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.DurationFlag.ApplyWithError(set)
+}
+
+// Float64Flag is the flag type that wraps cli.Float64Flag to allow
+// for other values to be specified
+type Float64Flag struct {
+	*cli.Float64Flag
+	set *flag.FlagSet
+}
+
+// NewFloat64Flag creates a new Float64Flag
+func NewFloat64Flag(fl *cli.Float64Flag) *Float64Flag {
+	return &Float64Flag{Float64Flag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Float64Flag.Apply
+func (f *Float64Flag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Float64Flag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Float64Flag.ApplyWithError
+func (f *Float64Flag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Float64Flag.ApplyWithError(set)
+}
+
+// GenericFlag is the flag type that wraps cli.GenericFlag to allow
+// for other values to be specified
+type GenericFlag struct {
+	*cli.GenericFlag
+	set *flag.FlagSet
+}
+
+// NewGenericFlag creates a new GenericFlag
+func NewGenericFlag(fl *cli.GenericFlag) *GenericFlag {
+	return &GenericFlag{GenericFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped GenericFlag.Apply
+func (f *GenericFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.GenericFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped GenericFlag.ApplyWithError
+func (f *GenericFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.GenericFlag.ApplyWithError(set)
+}
+
+// Int64Flag is the flag type that wraps cli.Int64Flag to allow
+// for other values to be specified
+type Int64Flag struct {
+	*cli.Int64Flag
+	set *flag.FlagSet
+}
+
+// NewInt64Flag creates a new Int64Flag
+func NewInt64Flag(fl *cli.Int64Flag) *Int64Flag {
+	return &Int64Flag{Int64Flag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Int64Flag.Apply
+func (f *Int64Flag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Int64Flag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Int64Flag.ApplyWithError
+func (f *Int64Flag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Int64Flag.ApplyWithError(set)
+}
+
+// IntFlag is the flag type that wraps cli.IntFlag to allow
+// for other values to be specified
+type IntFlag struct {
+	*cli.IntFlag
+	set *flag.FlagSet
+}
+
+// NewIntFlag creates a new IntFlag
+func NewIntFlag(fl *cli.IntFlag) *IntFlag {
+	return &IntFlag{IntFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped IntFlag.Apply
+func (f *IntFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.IntFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped IntFlag.ApplyWithError
+func (f *IntFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.IntFlag.ApplyWithError(set)
+}
+
+// IntSliceFlag is the flag type that wraps cli.IntSliceFlag to allow
+// for other values to be specified
+type IntSliceFlag struct {
+	*cli.IntSliceFlag
+	set *flag.FlagSet
+}
+
+// NewIntSliceFlag creates a new IntSliceFlag
+func NewIntSliceFlag(fl *cli.IntSliceFlag) *IntSliceFlag {
+	return &IntSliceFlag{IntSliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped IntSliceFlag.Apply
+func (f *IntSliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.IntSliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped IntSliceFlag.ApplyWithError
+func (f *IntSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.IntSliceFlag.ApplyWithError(set)
+}
+
+// Int64SliceFlag is the flag type that wraps cli.Int64SliceFlag to allow
+// for other values to be specified
+type Int64SliceFlag struct {
+	*cli.Int64SliceFlag
+	set *flag.FlagSet
+}
+
+// NewInt64SliceFlag creates a new Int64SliceFlag
+func NewInt64SliceFlag(fl *cli.Int64SliceFlag) *Int64SliceFlag {
+	return &Int64SliceFlag{Int64SliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Int64SliceFlag.Apply
+func (f *Int64SliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Int64SliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Int64SliceFlag.ApplyWithError
+func (f *Int64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Int64SliceFlag.ApplyWithError(set)
+}
+
+// Float64SliceFlag is the flag type that wraps cli.Float64SliceFlag to allow
+// for other values to be specified
+type Float64SliceFlag struct {
+	*cli.Float64SliceFlag
+	set *flag.FlagSet
+}
+
+// NewFloat64SliceFlag creates a new Float64SliceFlag
+func NewFloat64SliceFlag(fl *cli.Float64SliceFlag) *Float64SliceFlag {
+	return &Float64SliceFlag{Float64SliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Float64SliceFlag.Apply
+func (f *Float64SliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Float64SliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Float64SliceFlag.ApplyWithError
+func (f *Float64SliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Float64SliceFlag.ApplyWithError(set)
+}
+
+// StringFlag is the flag type that wraps cli.StringFlag to allow
+// for other values to be specified
+type StringFlag struct {
+	*cli.StringFlag
+	set *flag.FlagSet
+}
+
+// NewStringFlag creates a new StringFlag
+func NewStringFlag(fl *cli.StringFlag) *StringFlag {
+	return &StringFlag{StringFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped StringFlag.Apply
+func (f *StringFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.StringFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped StringFlag.ApplyWithError
+func (f *StringFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.StringFlag.ApplyWithError(set)
+}
+
+// PathFlag is the flag type that wraps cli.PathFlag to allow
+// for other values to be specified
+type PathFlag struct {
+	*cli.PathFlag
+	set *flag.FlagSet
+}
+
+// NewPathFlag creates a new PathFlag
+func NewPathFlag(fl *cli.PathFlag) *PathFlag {
+	return &PathFlag{PathFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped PathFlag.Apply
+func (f *PathFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.PathFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped PathFlag.ApplyWithError
+func (f *PathFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.PathFlag.ApplyWithError(set)
+}
+
+// StringSliceFlag is the flag type that wraps cli.StringSliceFlag to allow
+// for other values to be specified
+type StringSliceFlag struct {
+	*cli.StringSliceFlag
+	set *flag.FlagSet
+}
+
+// NewStringSliceFlag creates a new StringSliceFlag
+func NewStringSliceFlag(fl *cli.StringSliceFlag) *StringSliceFlag {
+	return &StringSliceFlag{StringSliceFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped StringSliceFlag.Apply
+func (f *StringSliceFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.StringSliceFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped StringSliceFlag.ApplyWithError
+func (f *StringSliceFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.StringSliceFlag.ApplyWithError(set)
+}
+
+// Uint64Flag is the flag type that wraps cli.Uint64Flag to allow
+// for other values to be specified
+type Uint64Flag struct {
+	*cli.Uint64Flag
+	set *flag.FlagSet
+}
+
+// NewUint64Flag creates a new Uint64Flag
+func NewUint64Flag(fl *cli.Uint64Flag) *Uint64Flag {
+	return &Uint64Flag{Uint64Flag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped Uint64Flag.Apply
+func (f *Uint64Flag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.Uint64Flag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped Uint64Flag.ApplyWithError
+func (f *Uint64Flag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.Uint64Flag.ApplyWithError(set)
+}
+
+// UintFlag is the flag type that wraps cli.UintFlag to allow
+// for other values to be specified
+type UintFlag struct {
+	*cli.UintFlag
+	set *flag.FlagSet
+}
+
+// NewUintFlag creates a new UintFlag
+func NewUintFlag(fl *cli.UintFlag) *UintFlag {
+	return &UintFlag{UintFlag: fl, set: nil}
+}
+
+// Apply saves the flagSet for later usage calls, then calls the
+// wrapped UintFlag.Apply
+func (f *UintFlag) Apply(set *flag.FlagSet) {
+	f.set = set
+	f.UintFlag.Apply(set)
+}
+
+// ApplyWithError saves the flagSet for later usage calls, then calls the
+// wrapped UintFlag.ApplyWithError
+func (f *UintFlag) ApplyWithError(set *flag.FlagSet) error {
+	f.set = set
+	return f.UintFlag.ApplyWithError(set)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/flag_test.go

@@ -0,0 +1,352 @@
+package altsrc
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"runtime"
+	"strings"
+	"testing"
+	"time"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+type testApplyInputSource struct {
+	Flag               FlagInputSourceExtension
+	FlagName           string
+	FlagSetName        string
+	Expected           string
+	ContextValueString string
+	ContextValue       flag.Value
+	EnvVarValue        string
+	EnvVarName         string
+	SourcePath         string
+	MapValue           interface{}
+}
+
+func TestGenericApplyInputSourceValue(t *testing.T) {
+	v := &Parser{"abc", "def"}
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewGenericFlag(&cli.GenericFlag{Name: "test", Value: &Parser{}}),
+		FlagName: "test",
+		MapValue: v,
+	})
+	expect(t, v, c.Generic("test"))
+}
+
+func TestGenericApplyInputSourceMethodContextSet(t *testing.T) {
+	p := &Parser{"abc", "def"}
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewGenericFlag(&cli.GenericFlag{Name: "test", Value: &Parser{}}),
+		FlagName:           "test",
+		MapValue:           &Parser{"efg", "hig"},
+		ContextValueString: p.String(),
+	})
+	expect(t, p, c.Generic("test"))
+}
+
+func TestGenericApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag: NewGenericFlag(&cli.GenericFlag{
+			Name:    "test",
+			Value:   &Parser{},
+			EnvVars: []string{"TEST"},
+		}),
+		FlagName:    "test",
+		MapValue:    &Parser{"efg", "hij"},
+		EnvVarName:  "TEST",
+		EnvVarValue: "abc,def",
+	})
+	expect(t, &Parser{"abc", "def"}, c.Generic("test"))
+}
+
+func TestStringSliceApplyInputSourceValue(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewStringSliceFlag(&cli.StringSliceFlag{Name: "test"}),
+		FlagName: "test",
+		MapValue: []interface{}{"hello", "world"},
+	})
+	expect(t, c.StringSlice("test"), []string{"hello", "world"})
+}
+
+func TestStringSliceApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewStringSliceFlag(&cli.StringSliceFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           []interface{}{"hello", "world"},
+		ContextValueString: "ohno",
+	})
+	expect(t, c.StringSlice("test"), []string{"ohno"})
+}
+
+func TestStringSliceApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewStringSliceFlag(&cli.StringSliceFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    []interface{}{"hello", "world"},
+		EnvVarName:  "TEST",
+		EnvVarValue: "oh,no",
+	})
+	expect(t, c.StringSlice("test"), []string{"oh", "no"})
+}
+
+func TestIntSliceApplyInputSourceValue(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewIntSliceFlag(&cli.IntSliceFlag{Name: "test"}),
+		FlagName: "test",
+		MapValue: []interface{}{1, 2},
+	})
+	expect(t, c.IntSlice("test"), []int{1, 2})
+}
+
+func TestIntSliceApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewIntSliceFlag(&cli.IntSliceFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           []interface{}{1, 2},
+		ContextValueString: "3",
+	})
+	expect(t, c.IntSlice("test"), []int{3})
+}
+
+func TestIntSliceApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewIntSliceFlag(&cli.IntSliceFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    []interface{}{1, 2},
+		EnvVarName:  "TEST",
+		EnvVarValue: "3,4",
+	})
+	expect(t, c.IntSlice("test"), []int{3, 4})
+}
+
+func TestBoolApplyInputSourceMethodSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewBoolFlag(&cli.BoolFlag{Name: "test"}),
+		FlagName: "test",
+		MapValue: true,
+	})
+	expect(t, true, c.Bool("test"))
+}
+
+func TestBoolApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewBoolFlag(&cli.BoolFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           false,
+		ContextValueString: "true",
+	})
+	expect(t, true, c.Bool("test"))
+}
+
+func TestBoolApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewBoolFlag(&cli.BoolFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    false,
+		EnvVarName:  "TEST",
+		EnvVarValue: "true",
+	})
+	expect(t, true, c.Bool("test"))
+}
+
+func TestStringApplyInputSourceMethodSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewStringFlag(&cli.StringFlag{Name: "test"}),
+		FlagName: "test",
+		MapValue: "hello",
+	})
+	expect(t, "hello", c.String("test"))
+}
+
+func TestStringApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewStringFlag(&cli.StringFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           "hello",
+		ContextValueString: "goodbye",
+	})
+	expect(t, "goodbye", c.String("test"))
+}
+
+func TestStringApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewStringFlag(&cli.StringFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    "hello",
+		EnvVarName:  "TEST",
+		EnvVarValue: "goodbye",
+	})
+	expect(t, "goodbye", c.String("test"))
+}
+func TestPathApplyInputSourceMethodSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:       NewPathFlag(&cli.PathFlag{Name: "test"}),
+		FlagName:   "test",
+		MapValue:   "hello",
+		SourcePath: "/path/to/source/file",
+	})
+
+	expected := "/path/to/source/hello"
+	if runtime.GOOS == "windows" {
+		expected = `C:\path\to\source\hello`
+	}
+	expect(t, expected, c.String("test"))
+}
+
+func TestPathApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewPathFlag(&cli.PathFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           "hello",
+		ContextValueString: "goodbye",
+		SourcePath:         "/path/to/source/file",
+	})
+	expect(t, "goodbye", c.String("test"))
+}
+
+func TestPathApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewPathFlag(&cli.PathFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    "hello",
+		EnvVarName:  "TEST",
+		EnvVarValue: "goodbye",
+		SourcePath:  "/path/to/source/file",
+	})
+	expect(t, "goodbye", c.String("test"))
+}
+
+func TestIntApplyInputSourceMethodSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewIntFlag(&cli.IntFlag{Name: "test"}),
+		FlagName: "test",
+		MapValue: 15,
+	})
+	expect(t, 15, c.Int("test"))
+}
+
+func TestIntApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewIntFlag(&cli.IntFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           15,
+		ContextValueString: "7",
+	})
+	expect(t, 7, c.Int("test"))
+}
+
+func TestIntApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewIntFlag(&cli.IntFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    15,
+		EnvVarName:  "TEST",
+		EnvVarValue: "12",
+	})
+	expect(t, 12, c.Int("test"))
+}
+
+func TestDurationApplyInputSourceMethodSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewDurationFlag(&cli.DurationFlag{Name: "test"}),
+		FlagName: "test",
+		MapValue: time.Duration(30 * time.Second),
+	})
+	expect(t, time.Duration(30*time.Second), c.Duration("test"))
+}
+
+func TestDurationApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewDurationFlag(&cli.DurationFlag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           time.Duration(30 * time.Second),
+		ContextValueString: time.Duration(15 * time.Second).String(),
+	})
+	expect(t, time.Duration(15*time.Second), c.Duration("test"))
+}
+
+func TestDurationApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewDurationFlag(&cli.DurationFlag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    time.Duration(30 * time.Second),
+		EnvVarName:  "TEST",
+		EnvVarValue: time.Duration(15 * time.Second).String(),
+	})
+	expect(t, time.Duration(15*time.Second), c.Duration("test"))
+}
+
+func TestFloat64ApplyInputSourceMethodSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:     NewFloat64Flag(&cli.Float64Flag{Name: "test"}),
+		FlagName: "test",
+		MapValue: 1.3,
+	})
+	expect(t, 1.3, c.Float64("test"))
+}
+
+func TestFloat64ApplyInputSourceMethodContextSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:               NewFloat64Flag(&cli.Float64Flag{Name: "test"}),
+		FlagName:           "test",
+		MapValue:           1.3,
+		ContextValueString: fmt.Sprintf("%v", 1.4),
+	})
+	expect(t, 1.4, c.Float64("test"))
+}
+
+func TestFloat64ApplyInputSourceMethodEnvVarSet(t *testing.T) {
+	c := runTest(t, testApplyInputSource{
+		Flag:        NewFloat64Flag(&cli.Float64Flag{Name: "test", EnvVars: []string{"TEST"}}),
+		FlagName:    "test",
+		MapValue:    1.3,
+		EnvVarName:  "TEST",
+		EnvVarValue: fmt.Sprintf("%v", 1.4),
+	})
+	expect(t, 1.4, c.Float64("test"))
+}
+
+func runTest(t *testing.T, test testApplyInputSource) *cli.Context {
+	inputSource := &MapInputSource{
+		file:     test.SourcePath,
+		valueMap: map[interface{}]interface{}{test.FlagName: test.MapValue},
+	}
+	set := flag.NewFlagSet(test.FlagSetName, flag.ContinueOnError)
+	c := cli.NewContext(nil, set, nil)
+	if test.EnvVarName != "" && test.EnvVarValue != "" {
+		os.Setenv(test.EnvVarName, test.EnvVarValue)
+		defer os.Setenv(test.EnvVarName, "")
+	}
+
+	test.Flag.Apply(set)
+	if test.ContextValue != nil {
+		flag := set.Lookup(test.FlagName)
+		flag.Value = test.ContextValue
+	}
+	if test.ContextValueString != "" {
+		set.Set(test.FlagName, test.ContextValueString)
+	}
+	test.Flag.ApplyInputSourceValue(c, inputSource)
+
+	return c
+}
+
+type Parser [2]string
+
+func (p *Parser) Set(value string) error {
+	parts := strings.Split(value, ",")
+	if len(parts) != 2 {
+		return fmt.Errorf("invalid format")
+	}
+
+	(*p)[0] = parts[0]
+	(*p)[1] = parts[1]
+
+	return nil
+}
+
+func (p *Parser) String() string {
+	return fmt.Sprintf("%s,%s", p[0], p[1])
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/helpers_test.go

@@ -0,0 +1,28 @@
+package altsrc
+
+import (
+	"os"
+	"reflect"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+var (
+	wd, _ = os.Getwd()
+)
+
+func expect(t *testing.T, a interface{}, b interface{}) {
+	_, fn, line, _ := runtime.Caller(1)
+	fn = strings.Replace(fn, wd+"/", "", -1)
+
+	if !reflect.DeepEqual(a, b) {
+		t.Errorf("(%s:%d) Expected %v (type %v) - Got %v (type %v)", fn, line, b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	}
+}
+
+func refute(t *testing.T, a interface{}, b interface{}) {
+	if a == b {
+		t.Errorf("Did not expect %v (type %v) - Got %v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	}
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/input_source_context.go

@@ -0,0 +1,25 @@
+package altsrc
+
+import (
+	"time"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+// InputSourceContext is an interface used to allow
+// other input sources to be implemented as needed.
+//
+// Source returns an identifier for the input source. In case of file source
+// it should return path to the file.
+type InputSourceContext interface {
+	Source() string
+
+	Int(name string) (int, error)
+	Duration(name string) (time.Duration, error)
+	Float64(name string) (float64, error)
+	String(name string) (string, error)
+	StringSlice(name string) ([]string, error)
+	IntSlice(name string) ([]int, error)
+	Generic(name string) (cli.Generic, error)
+	Bool(name string) (bool, error)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/json_command_test.go

@@ -0,0 +1,324 @@
+package altsrc
+
+import (
+	"flag"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+const (
+	fileName   = "current.json"
+	simpleJSON = `{"test": 15}`
+	nestedJSON = `{"top": {"test": 15}}`
+)
+
+func TestCommandJSONFileTest(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, simpleJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileTestGlobalEnvVarWins(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, simpleJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileTestGlobalEnvVarWinsNested(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, nestedJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileTestSpecifiedFlagWins(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, simpleJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"test-cmd", "--load", fileName, "--test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileTestSpecifiedFlagWinsNested(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, nestedJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"test-cmd", "--load", fileName, "--top.test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileTestDefaultValueFileWins(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, simpleJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", Value: 7}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileTestDefaultValueFileWinsNested(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, nestedJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileFlagHasDefaultGlobalEnvJSONSetGlobalEnvWins(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, simpleJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", Value: 7, EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandJSONFileFlagHasDefaultGlobalEnvJSONSetGlobalEnvWinsNested(t *testing.T) {
+	cleanup := writeTempFile(t, fileName, nestedJSON)
+	defer cleanup()
+
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", fileName}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7, EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewJSONSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func writeTempFile(t *testing.T, name string, content string) func() {
+	if err := ioutil.WriteFile(name, []byte(content), 0666); err != nil {
+		t.Fatalf("cannot write %q: %v", name, err)
+	}
+	return func() {
+		if err := os.Remove(name); err != nil {
+			t.Errorf("cannot remove %q: %v", name, err)
+		}
+	}
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/json_source_context.go

@@ -0,0 +1,217 @@
+package altsrc
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"strings"
+	"time"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+// NewJSONSourceFromFlagFunc returns a func that takes a cli.Context
+// and returns an InputSourceContext suitable for retrieving config
+// variables from a file containing JSON data with the file name defined
+// by the given flag.
+func NewJSONSourceFromFlagFunc(flag string) func(c *cli.Context) (InputSourceContext, error) {
+	return func(context *cli.Context) (InputSourceContext, error) {
+		return NewJSONSourceFromFile(context.String(flag))
+	}
+}
+
+// NewJSONSourceFromFile returns an InputSourceContext suitable for
+// retrieving config variables from a file (or url) containing JSON
+// data.
+func NewJSONSourceFromFile(f string) (InputSourceContext, error) {
+	data, err := loadDataFrom(f)
+	if err != nil {
+		return nil, err
+	}
+	s, err := newJSONSource(data)
+	if err != nil {
+		return nil, err
+	}
+
+	s.file = f
+	return s, nil
+}
+
+// NewJSONSourceFromReader returns an InputSourceContext suitable for
+// retrieving config variables from an io.Reader that returns JSON data.
+func NewJSONSourceFromReader(r io.Reader) (InputSourceContext, error) {
+	data, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+	return NewJSONSource(data)
+}
+
+// NewJSONSource returns an InputSourceContext suitable for retrieving
+// config variables from raw JSON data.
+func NewJSONSource(data []byte) (InputSourceContext, error) {
+	return newJSONSource(data)
+}
+
+func newJSONSource(data []byte) (*jsonSource, error) {
+	var deserialized map[string]interface{}
+	if err := json.Unmarshal(data, &deserialized); err != nil {
+		return nil, err
+	}
+	return &jsonSource{deserialized: deserialized}, nil
+}
+
+func (x *jsonSource) Source() string {
+	return x.file
+}
+
+func (x *jsonSource) Int(name string) (int, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return 0, err
+	}
+	switch v := i.(type) {
+	default:
+		return 0, fmt.Errorf("unexpected type %T for %q", i, name)
+	case int:
+		return v, nil
+	case float64:
+		return int(float64(v)), nil
+	case float32:
+		return int(float32(v)), nil
+	}
+}
+
+func (x *jsonSource) Duration(name string) (time.Duration, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return 0, err
+	}
+	v, ok := (time.Duration)(0), false
+	if v, ok = i.(time.Duration); !ok {
+		return v, fmt.Errorf("unexpected type %T for %q", i, name)
+	}
+	return v, nil
+}
+
+func (x *jsonSource) Float64(name string) (float64, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return 0, err
+	}
+	v, ok := (float64)(0), false
+	if v, ok = i.(float64); !ok {
+		return v, fmt.Errorf("unexpected type %T for %q", i, name)
+	}
+	return v, nil
+}
+
+func (x *jsonSource) String(name string) (string, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return "", err
+	}
+	v, ok := "", false
+	if v, ok = i.(string); !ok {
+		return v, fmt.Errorf("unexpected type %T for %q", i, name)
+	}
+	return v, nil
+}
+
+func (x *jsonSource) StringSlice(name string) ([]string, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return nil, err
+	}
+	switch v := i.(type) {
+	default:
+		return nil, fmt.Errorf("unexpected type %T for %q", i, name)
+	case []string:
+		return v, nil
+	case []interface{}:
+		c := []string{}
+		for _, s := range v {
+			if str, ok := s.(string); ok {
+				c = append(c, str)
+			} else {
+				return c, fmt.Errorf("unexpected item type %T in %T for %q", s, c, name)
+			}
+		}
+		return c, nil
+	}
+}
+
+func (x *jsonSource) IntSlice(name string) ([]int, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return nil, err
+	}
+	switch v := i.(type) {
+	default:
+		return nil, fmt.Errorf("unexpected type %T for %q", i, name)
+	case []int:
+		return v, nil
+	case []interface{}:
+		c := []int{}
+		for _, s := range v {
+			if i2, ok := s.(int); ok {
+				c = append(c, i2)
+			} else {
+				return c, fmt.Errorf("unexpected item type %T in %T for %q", s, c, name)
+			}
+		}
+		return c, nil
+	}
+}
+
+func (x *jsonSource) Generic(name string) (cli.Generic, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return nil, err
+	}
+	v, ok := (cli.Generic)(nil), false
+	if v, ok = i.(cli.Generic); !ok {
+		return v, fmt.Errorf("unexpected type %T for %q", i, name)
+	}
+	return v, nil
+}
+
+func (x *jsonSource) Bool(name string) (bool, error) {
+	i, err := x.getValue(name)
+	if err != nil {
+		return false, err
+	}
+	v, ok := false, false
+	if v, ok = i.(bool); !ok {
+		return v, fmt.Errorf("unexpected type %T for %q", i, name)
+	}
+	return v, nil
+}
+
+func (x *jsonSource) getValue(key string) (interface{}, error) {
+	return jsonGetValue(key, x.deserialized)
+}
+
+func jsonGetValue(key string, m map[string]interface{}) (interface{}, error) {
+	var ret interface{}
+	var ok bool
+	working := m
+	keys := strings.Split(key, ".")
+	for ix, k := range keys {
+		if ret, ok = working[k]; !ok {
+			return ret, fmt.Errorf("missing key %q", key)
+		}
+		if working, ok = ret.(map[string]interface{}); !ok {
+			if ix < len(keys)-1 {
+				return ret, fmt.Errorf("unexpected intermediate value at %q segment of %q: %T", k, key, ret)
+			}
+		}
+	}
+	return ret, nil
+}
+
+type jsonSource struct {
+	file         string
+	deserialized map[string]interface{}
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/map_input_source.go

@@ -0,0 +1,250 @@
+package altsrc
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"time"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+// MapInputSource implements InputSourceContext to return
+// data from the map that is loaded.
+type MapInputSource struct {
+	file     string
+	valueMap map[interface{}]interface{}
+}
+
+// nestedVal checks if the name has '.' delimiters.
+// If so, it tries to traverse the tree by the '.' delimited sections to find
+// a nested value for the key.
+func nestedVal(name string, tree map[interface{}]interface{}) (interface{}, bool) {
+	if sections := strings.Split(name, "."); len(sections) > 1 {
+		node := tree
+		for _, section := range sections[:len(sections)-1] {
+			if child, ok := node[section]; !ok {
+				return nil, false
+			} else {
+				if ctype, ok := child.(map[interface{}]interface{}); !ok {
+					return nil, false
+				} else {
+					node = ctype
+				}
+			}
+		}
+		if val, ok := node[sections[len(sections)-1]]; ok {
+			return val, true
+		}
+	}
+	return nil, false
+}
+
+// Source returns the path of the source file
+func (fsm *MapInputSource) Source() string {
+	return fsm.file
+}
+
+// Int returns an int from the map if it exists otherwise returns 0
+func (fsm *MapInputSource) Int(name string) (int, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if exists {
+		otherValue, isType := otherGenericValue.(int)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "int", otherGenericValue)
+		}
+		return otherValue, nil
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(int)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "int", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
+
+	return 0, nil
+}
+
+// Duration returns a duration from the map if it exists otherwise returns 0
+func (fsm *MapInputSource) Duration(name string) (time.Duration, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if exists {
+		return castDuration(name, otherGenericValue)
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		return castDuration(name, nestedGenericValue)
+	}
+
+	return 0, nil
+}
+
+func castDuration(name string, value interface{}) (time.Duration, error) {
+	if otherValue, isType := value.(time.Duration); isType {
+		return otherValue, nil
+	}
+	otherStringValue, isType := value.(string)
+	parsedValue, err := time.ParseDuration(otherStringValue)
+	if !isType || err != nil {
+		return 0, incorrectTypeForFlagError(name, "duration", value)
+	}
+	return parsedValue, nil
+}
+
+// Float64 returns an float64 from the map if it exists otherwise returns 0
+func (fsm *MapInputSource) Float64(name string) (float64, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if exists {
+		otherValue, isType := otherGenericValue.(float64)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "float64", otherGenericValue)
+		}
+		return otherValue, nil
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(float64)
+		if !isType {
+			return 0, incorrectTypeForFlagError(name, "float64", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
+
+	return 0, nil
+}
+
+// String returns a string from the map if it exists otherwise returns an empty string
+func (fsm *MapInputSource) String(name string) (string, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if exists {
+		otherValue, isType := otherGenericValue.(string)
+		if !isType {
+			return "", incorrectTypeForFlagError(name, "string", otherGenericValue)
+		}
+		return otherValue, nil
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(string)
+		if !isType {
+			return "", incorrectTypeForFlagError(name, "string", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
+
+	return "", nil
+}
+
+// StringSlice returns an []string from the map if it exists otherwise returns nil
+func (fsm *MapInputSource) StringSlice(name string) ([]string, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if !exists {
+		otherGenericValue, exists = nestedVal(name, fsm.valueMap)
+		if !exists {
+			return nil, nil
+		}
+	}
+
+	otherValue, isType := otherGenericValue.([]interface{})
+	if !isType {
+		return nil, incorrectTypeForFlagError(name, "[]interface{}", otherGenericValue)
+	}
+
+	var stringSlice = make([]string, 0, len(otherValue))
+	for i, v := range otherValue {
+		stringValue, isType := v.(string)
+
+		if !isType {
+			return nil, incorrectTypeForFlagError(fmt.Sprintf("%s[%d]", name, i), "string", v)
+		}
+
+		stringSlice = append(stringSlice, stringValue)
+	}
+
+	return stringSlice, nil
+}
+
+// IntSlice returns an []int from the map if it exists otherwise returns nil
+func (fsm *MapInputSource) IntSlice(name string) ([]int, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if !exists {
+		otherGenericValue, exists = nestedVal(name, fsm.valueMap)
+		if !exists {
+			return nil, nil
+		}
+	}
+
+	otherValue, isType := otherGenericValue.([]interface{})
+	if !isType {
+		return nil, incorrectTypeForFlagError(name, "[]interface{}", otherGenericValue)
+	}
+
+	var intSlice = make([]int, 0, len(otherValue))
+	for i, v := range otherValue {
+		intValue, isType := v.(int)
+
+		if !isType {
+			return nil, incorrectTypeForFlagError(fmt.Sprintf("%s[%d]", name, i), "int", v)
+		}
+
+		intSlice = append(intSlice, intValue)
+	}
+
+	return intSlice, nil
+}
+
+// Generic returns an cli.Generic from the map if it exists otherwise returns nil
+func (fsm *MapInputSource) Generic(name string) (cli.Generic, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if exists {
+		otherValue, isType := otherGenericValue.(cli.Generic)
+		if !isType {
+			return nil, incorrectTypeForFlagError(name, "cli.Generic", otherGenericValue)
+		}
+		return otherValue, nil
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(cli.Generic)
+		if !isType {
+			return nil, incorrectTypeForFlagError(name, "cli.Generic", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
+
+	return nil, nil
+}
+
+// Bool returns an bool from the map otherwise returns false
+func (fsm *MapInputSource) Bool(name string) (bool, error) {
+	otherGenericValue, exists := fsm.valueMap[name]
+	if exists {
+		otherValue, isType := otherGenericValue.(bool)
+		if !isType {
+			return false, incorrectTypeForFlagError(name, "bool", otherGenericValue)
+		}
+		return otherValue, nil
+	}
+	nestedGenericValue, exists := nestedVal(name, fsm.valueMap)
+	if exists {
+		otherValue, isType := nestedGenericValue.(bool)
+		if !isType {
+			return false, incorrectTypeForFlagError(name, "bool", nestedGenericValue)
+		}
+		return otherValue, nil
+	}
+
+	return false, nil
+}
+
+func incorrectTypeForFlagError(name, expectedTypeName string, value interface{}) error {
+	valueType := reflect.TypeOf(value)
+	valueTypeName := ""
+	if valueType != nil {
+		valueTypeName = valueType.Name()
+	}
+
+	return fmt.Errorf("Mismatched type for flag '%s'. Expected '%s' but actual is '%s'", name, expectedTypeName, valueTypeName)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/map_input_source_test.go

@@ -0,0 +1,25 @@
+package altsrc
+
+import (
+	"testing"
+	"time"
+)
+
+func TestMapDuration(t *testing.T) {
+	inputSource := &MapInputSource{
+		file: "test",
+		valueMap: map[interface{}]interface{}{
+			"duration_of_duration_type": time.Minute,
+			"duration_of_string_type":   "1m",
+			"duration_of_int_type":      1000,
+		},
+	}
+	d, err := inputSource.Duration("duration_of_duration_type")
+	expect(t, time.Minute, d)
+	expect(t, nil, err)
+	d, err = inputSource.Duration("duration_of_string_type")
+	expect(t, time.Minute, d)
+	expect(t, nil, err)
+	d, err = inputSource.Duration("duration_of_int_type")
+	refute(t, nil, err)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/toml_command_test.go

@@ -0,0 +1,310 @@
+// Disabling building of toml support in cases where golang is 1.0 or 1.1
+// as the encoding library is not implemented or supported.
+
+// +build go1.2
+
+package altsrc
+
+import (
+	"flag"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+func TestCommandTomFileTest(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestGlobalEnvVarWins(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestGlobalEnvVarWinsNested(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("[top]\ntest = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestSpecifiedFlagWins(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml", "--test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestSpecifiedFlagWinsNested(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte(`[top]
+  test = 15`), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml", "--top.test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestDefaultValueFileWins(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", Value: 7}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileTestDefaultValueFileWinsNested(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("[top]\ntest = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileFlagHasDefaultGlobalEnvTomlSetGlobalEnvWins(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("test = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", Value: 7, EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandTomlFileFlagHasDefaultGlobalEnvTomlSetGlobalEnvWinsNested(t *testing.T) {
+	app := (&cli.App{})
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.toml", []byte("[top]\ntest = 15"), 0666)
+	defer os.Remove("current.toml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.toml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7, EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewTomlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/toml_file_loader.go

@@ -0,0 +1,113 @@
+// Disabling building of toml support in cases where golang is 1.0 or 1.1
+// as the encoding library is not implemented or supported.
+
+// +build go1.2
+
+package altsrc
+
+import (
+	"fmt"
+	"reflect"
+
+	"github.com/BurntSushi/toml"
+	"gopkg.in/urfave/cli.v2"
+)
+
+type tomlMap struct {
+	Map map[interface{}]interface{}
+}
+
+func unmarshalMap(i interface{}) (ret map[interface{}]interface{}, err error) {
+	ret = make(map[interface{}]interface{})
+	m := i.(map[string]interface{})
+	for key, val := range m {
+		v := reflect.ValueOf(val)
+		switch v.Kind() {
+		case reflect.Bool:
+			ret[key] = val.(bool)
+		case reflect.String:
+			ret[key] = val.(string)
+		case reflect.Int:
+			ret[key] = int(val.(int))
+		case reflect.Int8:
+			ret[key] = int(val.(int8))
+		case reflect.Int16:
+			ret[key] = int(val.(int16))
+		case reflect.Int32:
+			ret[key] = int(val.(int32))
+		case reflect.Int64:
+			ret[key] = int(val.(int64))
+		case reflect.Uint:
+			ret[key] = int(val.(uint))
+		case reflect.Uint8:
+			ret[key] = int(val.(uint8))
+		case reflect.Uint16:
+			ret[key] = int(val.(uint16))
+		case reflect.Uint32:
+			ret[key] = int(val.(uint32))
+		case reflect.Uint64:
+			ret[key] = int(val.(uint64))
+		case reflect.Float32:
+			ret[key] = float64(val.(float32))
+		case reflect.Float64:
+			ret[key] = float64(val.(float64))
+		case reflect.Map:
+			if tmp, err := unmarshalMap(val); err == nil {
+				ret[key] = tmp
+			} else {
+				return nil, err
+			}
+		case reflect.Array, reflect.Slice:
+			ret[key] = val.([]interface{})
+		default:
+			return nil, fmt.Errorf("Unsupported: type = %#v", v.Kind())
+		}
+	}
+	return ret, nil
+}
+
+func (self *tomlMap) UnmarshalTOML(i interface{}) error {
+	if tmp, err := unmarshalMap(i); err == nil {
+		self.Map = tmp
+	} else {
+		return err
+	}
+	return nil
+}
+
+type tomlSourceContext struct {
+	FilePath string
+}
+
+// NewTomlSourceFromFile creates a new TOML InputSourceContext from a filepath.
+func NewTomlSourceFromFile(file string) (InputSourceContext, error) {
+	tsc := &tomlSourceContext{FilePath: file}
+	var results tomlMap = tomlMap{}
+	if err := readCommandToml(tsc.FilePath, &results); err != nil {
+		return nil, fmt.Errorf("Unable to load TOML file '%s': inner error: \n'%v'", tsc.FilePath, err.Error())
+	}
+	return &MapInputSource{file: file, valueMap: results.Map}, nil
+}
+
+// NewTomlSourceFromFlagFunc creates a new TOML InputSourceContext from a provided flag name and source context.
+func NewTomlSourceFromFlagFunc(flagFileName string) func(context *cli.Context) (InputSourceContext, error) {
+	return func(context *cli.Context) (InputSourceContext, error) {
+		filePath := context.String(flagFileName)
+		return NewTomlSourceFromFile(filePath)
+	}
+}
+
+func readCommandToml(filePath string, container interface{}) (err error) {
+	b, err := loadDataFrom(filePath)
+	if err != nil {
+		return err
+	}
+
+	err = toml.Unmarshal(b, container)
+	if err != nil {
+		return err
+	}
+
+	err = nil
+	return
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/yaml_command_test.go

@@ -0,0 +1,313 @@
+// Disabling building of yaml support in cases where golang is 1.0 or 1.1
+// as the encoding library is not implemented or supported.
+
+// +build go1.2
+
+package altsrc
+
+import (
+	"flag"
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+func TestCommandYamlFileTest(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte("test: 15"), 0666)
+	defer os.Remove("current.yaml")
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileTestGlobalEnvVarWins(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte("test: 15"), 0666)
+	defer os.Remove("current.yaml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileTestGlobalEnvVarWinsNested(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	os.Setenv("THE_TEST", "10")
+	defer os.Setenv("THE_TEST", "")
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 10)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileTestSpecifiedFlagWins(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte("test: 15"), 0666)
+	defer os.Remove("current.yaml")
+
+	test := []string{"test-cmd", "--load", "current.yaml", "--test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileTestSpecifiedFlagWinsNested(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	test := []string{"test-cmd", "--load", "current.yaml", "--top.test", "7"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 7)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test"}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileTestDefaultValueFileWins(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte("test: 15"), 0666)
+	defer os.Remove("current.yaml")
+
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", Value: 7}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileTestDefaultValueFileWinsNested(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 15)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileFlagHasDefaultGlobalEnvYamlSetGlobalEnvWins(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte("test: 15"), 0666)
+	defer os.Remove("current.yaml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "test", Value: 7, EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}
+
+func TestCommandYamlFileFlagHasDefaultGlobalEnvYamlSetGlobalEnvWinsNested(t *testing.T) {
+	app := &cli.App{}
+	set := flag.NewFlagSet("test", 0)
+	ioutil.WriteFile("current.yaml", []byte(`top:
+  test: 15`), 0666)
+	defer os.Remove("current.yaml")
+
+	os.Setenv("THE_TEST", "11")
+	defer os.Setenv("THE_TEST", "")
+
+	test := []string{"test-cmd", "--load", "current.yaml"}
+	set.Parse(test)
+
+	c := cli.NewContext(app, set, nil)
+
+	command := &cli.Command{
+		Name:        "test-cmd",
+		Aliases:     []string{"tc"},
+		Usage:       "this is for testing",
+		Description: "testing",
+		Action: func(c *cli.Context) error {
+			val := c.Int("top.test")
+			expect(t, val, 11)
+			return nil
+		},
+		Flags: []cli.Flag{
+			NewIntFlag(&cli.IntFlag{Name: "top.test", Value: 7, EnvVars: []string{"THE_TEST"}}),
+			&cli.StringFlag{Name: "load"}},
+	}
+	command.Before = InitInputSourceWithContext(command.Flags, NewYamlSourceFromFlagFunc("load"))
+	err := command.Run(c)
+
+	expect(t, err, nil)
+}

vendor/gopkg.in/urfave/cli.v2/altsrc/yaml_file_loader.go

@@ -0,0 +1,92 @@
+// Disabling building of yaml support in cases where golang is 1.0 or 1.1
+// as the encoding library is not implemented or supported.
+
+// +build go1.2
+
+package altsrc
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"runtime"
+	"strings"
+
+	"gopkg.in/urfave/cli.v2"
+
+	"gopkg.in/yaml.v2"
+)
+
+type yamlSourceContext struct {
+	FilePath string
+}
+
+// NewYamlSourceFromFile creates a new Yaml InputSourceContext from a filepath.
+func NewYamlSourceFromFile(file string) (InputSourceContext, error) {
+	ysc := &yamlSourceContext{FilePath: file}
+	var results map[interface{}]interface{}
+	err := readCommandYaml(ysc.FilePath, &results)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to load Yaml file '%s': inner error: \n'%v'", ysc.FilePath, err.Error())
+	}
+
+	return &MapInputSource{file: file, valueMap: results}, nil
+}
+
+// NewYamlSourceFromFlagFunc creates a new Yaml InputSourceContext from a provided flag name and source context.
+func NewYamlSourceFromFlagFunc(flagFileName string) func(context *cli.Context) (InputSourceContext, error) {
+	return func(context *cli.Context) (InputSourceContext, error) {
+		filePath := context.String(flagFileName)
+		return NewYamlSourceFromFile(filePath)
+	}
+}
+
+func readCommandYaml(filePath string, container interface{}) (err error) {
+	b, err := loadDataFrom(filePath)
+	if err != nil {
+		return err
+	}
+
+	err = yaml.Unmarshal(b, container)
+	if err != nil {
+		return err
+	}
+
+	err = nil
+	return
+}
+
+func loadDataFrom(filePath string) ([]byte, error) {
+	u, err := url.Parse(filePath)
+	if err != nil {
+		return nil, err
+	}
+
+	if u.Host != "" { // i have a host, now do i support the scheme?
+		switch u.Scheme {
+		case "http", "https":
+			res, err := http.Get(filePath)
+			if err != nil {
+				return nil, err
+			}
+			return ioutil.ReadAll(res.Body)
+		default:
+			return nil, fmt.Errorf("scheme of %s is unsupported", filePath)
+		}
+	} else if u.Path != "" { // i dont have a host, but I have a path. I am a local file.
+		if _, notFoundFileErr := os.Stat(filePath); notFoundFileErr != nil {
+			return nil, fmt.Errorf("Cannot read from file: '%s' because it does not exist.", filePath)
+		}
+		return ioutil.ReadFile(filePath)
+	} else if runtime.GOOS == "windows" && strings.Contains(u.String(), "\\") {
+		// on Windows systems u.Path is always empty, so we need to check the string directly.
+		if _, notFoundFileErr := os.Stat(filePath); notFoundFileErr != nil {
+			return nil, fmt.Errorf("Cannot read from file: '%s' because it does not exist.", filePath)
+		}
+		return ioutil.ReadFile(filePath)
+	} else {
+		return nil, fmt.Errorf("unable to determine how to load from path %s", filePath)
+	}
+}