termui: migrate to awesome-gocui instead of the old fork I had

1 files changed, 217 insertions, 0 deletions

diff --git a/vendor/github.com/go-errors/errors/error.go b/vendor/github.com/go-errors/errors/error.go
new file mode 100644
index 00000000..60062a43
--- /dev/null
+++ b/vendor/github.com/go-errors/errors/error.go
@@ -0,0 +1,217 @@
+// Package errors provides errors that have stack-traces.
+//
+// This is particularly useful when you want to understand the
+// state of execution when an error was returned unexpectedly.
+//
+// It provides the type *Error which implements the standard
+// golang error interface, so you can use this library interchangably
+// with code that is expecting a normal error return.
+//
+// For example:
+//
+//  package crashy
+//
+//  import "github.com/go-errors/errors"
+//
+//  var Crashed = errors.Errorf("oh dear")
+//
+//  func Crash() error {
+//      return errors.New(Crashed)
+//  }
+//
+// This can be called as follows:
+//
+//  package main
+//
+//  import (
+//      "crashy"
+//      "fmt"
+//      "github.com/go-errors/errors"
+//  )
+//
+//  func main() {
+//      err := crashy.Crash()
+//      if err != nil {
+//          if errors.Is(err, crashy.Crashed) {
+//              fmt.Println(err.(*errors.Error).ErrorStack())
+//          } else {
+//              panic(err)
+//          }
+//      }
+//  }
+//
+// This package was original written to allow reporting to Bugsnag,
+// but after I found similar packages by Facebook and Dropbox, it
+// was moved to one canonical location so everyone can benefit.
+package errors
+
+import (
+	"bytes"
+	"fmt"
+	"reflect"
+	"runtime"
+)
+
+// The maximum number of stackframes on any error.
+var MaxStackDepth = 50
+
+// Error is an error with an attached stacktrace. It can be used
+// wherever the builtin error interface is expected.
+type Error struct {
+	Err    error
+	stack  []uintptr
+	frames []StackFrame
+	prefix string
+}
+
+// New makes an Error from the given value. If that value is already an
+// error then it will be used directly, if not, it will be passed to
+// fmt.Errorf("%v"). The stacktrace will point to the line of code that
+// called New.
+func New(e interface{}) *Error {
+	var err error
+
+	switch e := e.(type) {
+	case error:
+		err = e
+	default:
+		err = fmt.Errorf("%v", e)
+	}
+
+	stack := make([]uintptr, MaxStackDepth)
+	length := runtime.Callers(2, stack[:])
+	return &Error{
+		Err:   err,
+		stack: stack[:length],
+	}
+}
+
+// Wrap makes an Error from the given value. If that value is already an
+// error then it will be used directly, if not, it will be passed to
+// fmt.Errorf("%v"). The skip parameter indicates how far up the stack
+// to start the stacktrace. 0 is from the current call, 1 from its caller, etc.
+func Wrap(e interface{}, skip int) *Error {
+	var err error
+
+	switch e := e.(type) {
+	case *Error:
+		return e
+	case error:
+		err = e
+	default:
+		err = fmt.Errorf("%v", e)
+	}
+
+	stack := make([]uintptr, MaxStackDepth)
+	length := runtime.Callers(2+skip, stack[:])
+	return &Error{
+		Err:   err,
+		stack: stack[:length],
+	}
+}
+
+// WrapPrefix makes an Error from the given value. If that value is already an
+// error then it will be used directly, if not, it will be passed to
+// fmt.Errorf("%v"). The prefix parameter is used to add a prefix to the
+// error message when calling Error(). The skip parameter indicates how far
+// up the stack to start the stacktrace. 0 is from the current call,
+// 1 from its caller, etc.
+func WrapPrefix(e interface{}, prefix string, skip int) *Error {
+
+	err := Wrap(e, 1+skip)
+
+	if err.prefix != "" {
+		prefix = fmt.Sprintf("%s: %s", prefix, err.prefix)
+	}
+
+	return &Error{
+		Err:    err.Err,
+		stack:  err.stack,
+		prefix: prefix,
+	}
+
+}
+
+// Is detects whether the error is equal to a given error. Errors
+// are considered equal by this function if they are the same object,
+// or if they both contain the same error inside an errors.Error.
+func Is(e error, original error) bool {
+
+	if e == original {
+		return true
+	}
+
+	if e, ok := e.(*Error); ok {
+		return Is(e.Err, original)
+	}
+
+	if original, ok := original.(*Error); ok {
+		return Is(e, original.Err)
+	}
+
+	return false
+}
+
+// Errorf creates a new error with the given message. You can use it
+// as a drop-in replacement for fmt.Errorf() to provide descriptive
+// errors in return values.
+func Errorf(format string, a ...interface{}) *Error {
+	return Wrap(fmt.Errorf(format, a...), 1)
+}
+
+// Error returns the underlying error's message.
+func (err *Error) Error() string {
+
+	msg := err.Err.Error()
+	if err.prefix != "" {
+		msg = fmt.Sprintf("%s: %s", err.prefix, msg)
+	}
+
+	return msg
+}
+
+// Stack returns the callstack formatted the same way that go does
+// in runtime/debug.Stack()
+func (err *Error) Stack() []byte {
+	buf := bytes.Buffer{}
+
+	for _, frame := range err.StackFrames() {
+		buf.WriteString(frame.String())
+	}
+
+	return buf.Bytes()
+}
+
+// Callers satisfies the bugsnag ErrorWithCallerS() interface
+// so that the stack can be read out.
+func (err *Error) Callers() []uintptr {
+	return err.stack
+}
+
+// ErrorStack returns a string that contains both the
+// error message and the callstack.
+func (err *Error) ErrorStack() string {
+	return err.TypeName() + " " + err.Error() + "\n" + string(err.Stack())
+}
+
+// StackFrames returns an array of frames containing information about the
+// stack.
+func (err *Error) StackFrames() []StackFrame {
+	if err.frames == nil {
+		err.frames = make([]StackFrame, len(err.stack))
+
+		for i, pc := range err.stack {
+			err.frames[i] = NewStackFrame(pc)
+		}
+	}
+
+	return err.frames
+}
+
+// TypeName returns the type this error. e.g. *errors.stringError.
+func (err *Error) TypeName() string {
+	if _, ok := err.Err.(uncaughtPanic); ok {
+		return "panic"
+	}
+	return reflect.TypeOf(err.Err).String()
+}