Implement Cobra CLI tooling, Viper config tooling (#336)

* start pulling out + replacing urfave and config

* replace many many instances of config

* move more stuff => viper

* properly remove urfave

* move some flags to root command

* add testrig commands to root

* alias config file keys

* start adding cli parsing tests

* reorder viper init

* remove config path alias

* fmt

* change config file keys to non-nested

* we're more or less in business now

* tidy up the common func

* go fmt

* get tests passing again

* add note about the cliparsing tests

* reorganize

* update docs with changes

* structure cmd dir better

* rename + move some files around

* fix dangling comma

1 files changed, 176 insertions, 0 deletions

diff --git a/vendor/github.com/spf13/cast/cast.go b/vendor/github.com/spf13/cast/cast.go
new file mode 100644
index 000000000..0cfe9418d
--- /dev/null
+++ b/vendor/github.com/spf13/cast/cast.go
@@ -0,0 +1,176 @@
+// Copyright © 2014 Steve Francia <spf@spf13.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+// Package cast provides easy and safe casting in Go.
+package cast
+
+import "time"
+
+// ToBool casts an interface to a bool type.
+func ToBool(i interface{}) bool {
+	v, _ := ToBoolE(i)
+	return v
+}
+
+// ToTime casts an interface to a time.Time type.
+func ToTime(i interface{}) time.Time {
+	v, _ := ToTimeE(i)
+	return v
+}
+
+func ToTimeInDefaultLocation(i interface{}, location *time.Location) time.Time {
+	v, _ := ToTimeInDefaultLocationE(i, location)
+	return v
+}
+
+// ToDuration casts an interface to a time.Duration type.
+func ToDuration(i interface{}) time.Duration {
+	v, _ := ToDurationE(i)
+	return v
+}
+
+// ToFloat64 casts an interface to a float64 type.
+func ToFloat64(i interface{}) float64 {
+	v, _ := ToFloat64E(i)
+	return v
+}
+
+// ToFloat32 casts an interface to a float32 type.
+func ToFloat32(i interface{}) float32 {
+	v, _ := ToFloat32E(i)
+	return v
+}
+
+// ToInt64 casts an interface to an int64 type.
+func ToInt64(i interface{}) int64 {
+	v, _ := ToInt64E(i)
+	return v
+}
+
+// ToInt32 casts an interface to an int32 type.
+func ToInt32(i interface{}) int32 {
+	v, _ := ToInt32E(i)
+	return v
+}
+
+// ToInt16 casts an interface to an int16 type.
+func ToInt16(i interface{}) int16 {
+	v, _ := ToInt16E(i)
+	return v
+}
+
+// ToInt8 casts an interface to an int8 type.
+func ToInt8(i interface{}) int8 {
+	v, _ := ToInt8E(i)
+	return v
+}
+
+// ToInt casts an interface to an int type.
+func ToInt(i interface{}) int {
+	v, _ := ToIntE(i)
+	return v
+}
+
+// ToUint casts an interface to a uint type.
+func ToUint(i interface{}) uint {
+	v, _ := ToUintE(i)
+	return v
+}
+
+// ToUint64 casts an interface to a uint64 type.
+func ToUint64(i interface{}) uint64 {
+	v, _ := ToUint64E(i)
+	return v
+}
+
+// ToUint32 casts an interface to a uint32 type.
+func ToUint32(i interface{}) uint32 {
+	v, _ := ToUint32E(i)
+	return v
+}
+
+// ToUint16 casts an interface to a uint16 type.
+func ToUint16(i interface{}) uint16 {
+	v, _ := ToUint16E(i)
+	return v
+}
+
+// ToUint8 casts an interface to a uint8 type.
+func ToUint8(i interface{}) uint8 {
+	v, _ := ToUint8E(i)
+	return v
+}
+
+// ToString casts an interface to a string type.
+func ToString(i interface{}) string {
+	v, _ := ToStringE(i)
+	return v
+}
+
+// ToStringMapString casts an interface to a map[string]string type.
+func ToStringMapString(i interface{}) map[string]string {
+	v, _ := ToStringMapStringE(i)
+	return v
+}
+
+// ToStringMapStringSlice casts an interface to a map[string][]string type.
+func ToStringMapStringSlice(i interface{}) map[string][]string {
+	v, _ := ToStringMapStringSliceE(i)
+	return v
+}
+
+// ToStringMapBool casts an interface to a map[string]bool type.
+func ToStringMapBool(i interface{}) map[string]bool {
+	v, _ := ToStringMapBoolE(i)
+	return v
+}
+
+// ToStringMapInt casts an interface to a map[string]int type.
+func ToStringMapInt(i interface{}) map[string]int {
+	v, _ := ToStringMapIntE(i)
+	return v
+}
+
+// ToStringMapInt64 casts an interface to a map[string]int64 type.
+func ToStringMapInt64(i interface{}) map[string]int64 {
+	v, _ := ToStringMapInt64E(i)
+	return v
+}
+
+// ToStringMap casts an interface to a map[string]interface{} type.
+func ToStringMap(i interface{}) map[string]interface{} {
+	v, _ := ToStringMapE(i)
+	return v
+}
+
+// ToSlice casts an interface to a []interface{} type.
+func ToSlice(i interface{}) []interface{} {
+	v, _ := ToSliceE(i)
+	return v
+}
+
+// ToBoolSlice casts an interface to a []bool type.
+func ToBoolSlice(i interface{}) []bool {
+	v, _ := ToBoolSliceE(i)
+	return v
+}
+
+// ToStringSlice casts an interface to a []string type.
+func ToStringSlice(i interface{}) []string {
+	v, _ := ToStringSliceE(i)
+	return v
+}
+
+// ToIntSlice casts an interface to a []int type.
+func ToIntSlice(i interface{}) []int {
+	v, _ := ToIntSliceE(i)
+	return v
+}
+
+// ToDurationSlice casts an interface to a []time.Duration type.
+func ToDurationSlice(i interface{}) []time.Duration {
+	v, _ := ToDurationSliceE(i)
+	return v
+}