pkg/cmd/download: remove zip/download/extract implementation

pkg/cmd/download.go

 package cmd
 
 import (
-	"archive/zip"
 	"fmt"
-	"io"
-	"io/ioutil"
-	"net/http"
 	"os"
-	"path/filepath"
-	"strings"
 
 	cli "github.com/spf13/cobra"
 
 	"github.com/tmrts/boilr/pkg/boilr"
-	"github.com/tmrts/boilr/pkg/cmd/util"
 	"github.com/tmrts/boilr/pkg/host"
 	"github.com/tmrts/boilr/pkg/util/exit"
 	"github.com/tmrts/boilr/pkg/util/git"
@@ -22,78 +15,6 @@ import (
 	"github.com/tmrts/boilr/pkg/util/validate"
 )
 
-func downloadZip(URL, targetDir string) error {
-	f, err := ioutil.TempFile("", "boilr-download")
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-	defer os.RemoveAll(f.Name())
-
-	resp, err := http.Get(URL)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	if _, err := io.Copy(f, resp.Body); err != nil {
-		return err
-	}
-
-	if err := f.Close(); err != nil {
-		return err
-	}
-
-	r, err := zip.OpenReader(f.Name())
-	if err != nil {
-		return err
-	}
-	defer r.Close()
-
-	extractFile := func(f *zip.File, dest string) error {
-		rc, err := f.Open()
-		if err != nil {
-			return err
-		}
-		defer rc.Close()
-
-		// splits the first token of f.Name since it's zip file name
-		path := filepath.Join(dest, strings.SplitAfterN(f.Name, "/", 2)[1])
-
-		if f.FileInfo().IsDir() {
-			err := os.MkdirAll(path, f.Mode())
-			if err != nil {
-				return err
-			}
-		} else {
-			f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
-			if err != nil {
-				return err
-			}
-			defer f.Close()
-
-			if _, err := io.Copy(f, rc); err != nil {
-				return err
-			}
-		}
-
-		return nil
-	}
-
-	for _, f := range r.File {
-		if err := extractFile(f, targetDir); err != nil {
-			return err
-		}
-	}
-
-	// TODO Wrap this function in a validation wrapper from top to bottom
-	if _, err := util.ValidateTemplate(targetDir); err != nil {
-		return err
-	}
-
-	return nil
-}
-
 // Download contains the cli-command for downloading templates from github.
 var Download = &cli.Command{
 	Use:   "download <template-repo> <template-tag>",