srpmproc/pkg/blob/file/file.go

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// Copyright (c) 2021 The Srpmproc Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package file
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
)
type File struct {
path string
}
func New(path string) *File {
return &File{
path: path,
}
}
func (f *File) Write(path string, content []byte) error {
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w, err := os.OpenFile(filepath.Join(f.path, path), os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0o644)
if err != nil {
return fmt.Errorf("could not open file: %v", err)
}
_, err = w.Write(content)
if err != nil {
return fmt.Errorf("could not write file to file: %v", err)
}
// Close, just like writing a file.
if err := w.Close(); err != nil {
return fmt.Errorf("could not close file writer to source: %v", err)
}
return nil
}
func (f *File) Read(path string) ([]byte, error) {
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r, err := os.OpenFile(filepath.Join(f.path, path), os.O_RDONLY, 0o644)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
body, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
return body, nil
}
func (f *File) Exists(path string) (bool, error) {
_, err := os.Stat(filepath.Join(f.path, path))
if !os.IsNotExist(err) {
if !os.IsExist(err) {
return false, err
}
return true, nil
}
return false, nil
}