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error.go
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error.go
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/*
* Zabbix Agent Bench (C) 2014 Ryan Armstrong <ryan@cavaliercoder.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"bytes"
"fmt"
"github.com/mitchellh/colorstring"
"os"
)
type Error struct {
Message string
InnerError error
}
func NewError(err error, format string, a ...interface{}) error {
return &Error{
Message: fmt.Sprintf(format, a...),
InnerError: err,
}
}
func (c *Error) Error() string {
buffer := bytes.NewBufferString(c.Message)
indent := 0
next := c.InnerError
for next != nil {
buffer.WriteString("\n")
indent++
for i := 0; i < indent; i++ {
buffer.WriteString(" ")
}
buffer.WriteString("-> ")
if nerr, ok := next.(*Error); ok {
buffer.WriteString(nerr.Message)
next = nerr.InnerError
} else {
buffer.WriteString(next.Error())
next = nil
}
}
return buffer.String()
}
func PrintError(err error) {
colorstring.Fprintf(os.Stderr, "[red]Error:[default] %s\n", err.Error())
}
func PanicOn(err error, format string, a ...interface{}) {
if err != nil {
PrintError(NewError(err, format, a...))
os.Exit(1)
}
}