progress-test.go

// Copyright 2016 Maciej Borzecki <[email protected]>
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//
// Usage:
//
//  ./progtest <file-path>
//  curl -s <URL> | ./progtest
//
package main

import (
	"fmt"
	"io"
	"os"

	"github.com/mendersoftware/mender/utils"
)

func main() {
	f := os.Stdin
	sz := int64(0)

	if len(os.Args) == 2 {
		userf, err := os.Open(os.Args[1])
		if err != nil {
			panic(fmt.Errorf("open failed: %v", err))
		}
		defer userf.Close()

		fi, err := userf.Stat()
		if err != nil {
			panic(fmt.Errorf("stat failed: %v", err))
		}
		sz = fi.Size()
		f = userf
	}

	p := &utils.ProgressWriter{
		Out: os.Stderr,
		N:   sz,
	}

	if _, err := io.Copy(p, f); err != nil {
		panic(fmt.Errorf("copy failed: %v", err))
	}
}