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// Copyright 2015 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 ioutil_test
import (
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
)
func ExampleReadAll() {
r := strings.NewReader("Go is a general-purpose language designed with systems programming in mind.")
b, err := ioutil.ReadAll(r)
if err != nil {
log.Fatal(err)
}
fmt.Printf("%s", b)
// Output:
// Go is a general-purpose language designed with systems programming in mind.
}
func ExampleReadDir() {
files, err := ioutil.ReadDir(".")
if err != nil {
log.Fatal(err)
}
for _, file := range files {
fmt.Println(file.Name())
}
}
func ExampleTempDir() {
content := []byte("temporary file's content")
dir, err := ioutil.TempDir("", "example")
if err != nil {
log.Fatal(err)
}
defer os.RemoveAll(dir) // clean up
tmpfn := filepath.Join(dir, "tmpfile")
if err := ioutil.WriteFile(tmpfn, content, 0666); err != nil {
log.Fatal(err)
}
}
func ExampleTempDir_suffix() {
parentDir := os.TempDir()
logsDir, err := ioutil.TempDir(parentDir, "*-logs")
if err != nil {
log.Fatal(err)
}
defer os.RemoveAll(logsDir) // clean up
// Logs can be cleaned out earlier if needed by searching
// for all directories whose suffix ends in *-logs.
globPattern := filepath.Join(parentDir, "*-logs")
matches, err := filepath.Glob(globPattern)
if err != nil {
log.Fatalf("Failed to match %q: %v", globPattern, err)
}
for _, match := range matches {
if err := os.RemoveAll(match); err != nil {
log.Printf("Failed to remove %q: %v", match, err)
}
}
}
func ExampleTempFile() {
content := []byte("temporary file's content")
tmpfile, err := ioutil.TempFile("", "example")
if err != nil {
log.Fatal(err)
}
defer os.Remove(tmpfile.Name()) // clean up
if _, err := tmpfile.Write(content); err != nil {
log.Fatal(err)
}
if err := tmpfile.Close(); err != nil {
log.Fatal(err)
}
}
func ExampleTempFile_suffix() {
content := []byte("temporary file's content")
tmpfile, err := ioutil.TempFile("", "example.*.txt")
if err != nil {
log.Fatal(err)
}
defer os.Remove(tmpfile.Name()) // clean up
if _, err := tmpfile.Write(content); err != nil {
tmpfile.Close()
log.Fatal(err)
}
if err := tmpfile.Close(); err != nil {
log.Fatal(err)
}
}
func ExampleReadFile() {
content, err := ioutil.ReadFile("testdata/hello")
if err != nil {
log.Fatal(err)
}
fmt.Printf("File contents: %s", content)
// Output:
// File contents: Hello, Gophers!
}
func ExampleWriteFile() {
message := []byte("Hello, Gophers!")
err := ioutil.WriteFile("hello", message, 0644)
if err != nil {
log.Fatal(err)
}
}
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