unzip.go

// From https://golangcode.com/unzip-files-in-go/

package flora

import (
	"archive/zip"
	"io"
	"os"
	"path/filepath"
	"strings"
)

func unzip(src, dest string) ([]string, error) {
	var filenames []string

	r, err := zip.OpenReader(src)

	if err != nil {
		return filenames, err
	}

	defer r.Close()

	for _, f := range r.File {
		rc, err := f.Open()

		if err != nil {
			return filenames, err
		}

		defer rc.Close()

		// Store filename/path for returning and using later on
		fpath := filepath.Join(dest, f.Name) //nolint:gosec
		filenames = append(filenames, fpath)

		if f.FileInfo().IsDir() {
			// Make Folder
			if err = os.MkdirAll(fpath, os.ModePerm); err != nil {
				return nil, err
			}
		} else {
			// Make File
			var fdir string
			if lastIndex := strings.LastIndex(fpath, string(os.PathSeparator)); lastIndex > -1 {
				fdir = fpath[:lastIndex]
			}

			err = os.MkdirAll(fdir, os.ModePerm)
			if err != nil {
				return filenames, err
			}
			f, err := os.OpenFile(
				fpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
			if err != nil {
				return filenames, err
			}
			defer f.Close()

			_, err = io.Copy(f, rc)
			if err != nil {
				return filenames, err
			}
		}
	}

	return filenames, nil
}