/
gzip.go
75 lines (67 loc) · 1.36 KB
/
gzip.go
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// Copyright 2018 Shannon Pekary. All rights reserved.
// Use of this source code is governed by an MIT
// license that can be found in the LICENSE file.
package cmd
import (
ziplib "compress/gzip"
"fmt"
"io"
"os"
"path/filepath"
"github.com/spf13/cobra"
)
func gzip(_ *cobra.Command, _ []string) error {
if len(files) == 0 {
if verbose {
fmt.Printf("No source files were specified in a gzip operation.")
}
return nil
}
for _, f := range files {
if err := zipFile(f); err != nil {
if filepath.Ext(f) == ".gz" {
continue // do not compress a file that is already compressed
}
return fmt.Errorf("error zipping file %s: %s", f, err.Error())
}
if deleteAfterZip {
if err := os.Remove(f); err != nil {
return fmt.Errorf("error deleting file %s: %s", f, err.Error())
}
}
if verbose {
fmt.Printf("Zipped %s\n", f)
}
}
return nil
}
func zipFile(fileName string) error {
f, err := os.Create(fileName + ".gz")
if err != nil {
return err
}
defer func() {
_ = f.Close()
}()
var r *os.File
r, err = os.Open(fileName)
if err != nil {
return err
}
defer func() {
_ = r.Close()
}()
var buf []byte
buf, err = io.ReadAll(r)
var w *ziplib.Writer
w, err = ziplib.NewWriterLevel(f, gzipCompressionLevel)
if err != nil {
return err
}
_, err = w.Write(buf)
if err != nil {
return err
}
err = w.Close()
return err
}