golang/dep

// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package gps

import (
    "bytes"
    "fmt"
)

type errorSlice []error

func (errs errorSlice) Error() string {
    var buf bytes.Buffer
    fmt.Fprintln(&buf)
    for i, err := range errs {
        fmt.Fprintf(&buf, "\t(%d) %s\n", i+1, err)
    }
    return buf.String()
}

func (errs errorSlice) Format(f fmt.State, c rune) {
    fmt.Fprintln(f)
    for i, err := range errs {
        if ferr, ok := err.(fmt.Formatter); ok {
            fmt.Fprintf(f, "\t(%d) ", i+1)
            ferr.Format(f, c)
            fmt.Fprint(f, "\n")
        } else {
            fmt.Fprintf(f, "\t(%d) %s\n", i+1, err)
        }
    }
}