mirror of
https://github.com/gopl-zh/gopl-zh.github.com.git
synced 2024-11-14 10:23:42 +00:00
43 lines
851 B
Go
43 lines
851 B
Go
// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
|
|
|
// +build ignore
|
|
|
|
// The thumbnail command produces thumbnails of JPEG files
|
|
// whose names are provided on each line of the standard input.
|
|
//
|
|
// The "+build ignore" tag (see p.295) excludes this file from the
|
|
// thumbnail package, but it can be compiled as a command and run like
|
|
// this:
|
|
//
|
|
// Run with:
|
|
// $ go run $GOPATH/src/gopl.io/ch8/thumbnail/main.go
|
|
// foo.jpeg
|
|
// ^D
|
|
//
|
|
package main
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"log"
|
|
"os"
|
|
|
|
"gopl.io/ch8/thumbnail"
|
|
)
|
|
|
|
func main() {
|
|
input := bufio.NewScanner(os.Stdin)
|
|
for input.Scan() {
|
|
thumb, err := thumbnail.ImageFile(input.Text())
|
|
if err != nil {
|
|
log.Print(err)
|
|
continue
|
|
}
|
|
fmt.Println(thumb)
|
|
}
|
|
if err := input.Err(); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|