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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
// vespa init command
// author: bratseth
package cmd
import (
"archive/zip"
"errors"
"path/filepath"
"github.com/spf13/cobra"
"github.com/vespa-engine/vespa/utils"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"strings"
"time"
)
// Set this to test without downloading this file from github
var existingSampleAppsZip string
func init() {
existingSampleAppsZip = ""
rootCmd.AddCommand(initCmd)
}
var initCmd = &cobra.Command{
// TODO: "application" and "list" subcommands?
Use: "init",
Short: "Creates the files and directory structure for a new Vespa application",
Long: `TODO: vespa init applicationName source`,
Args: func(cmd *cobra.Command, args []string) error {
if len(args) != 2 {
return errors.New("vespa init requires a project name and source")
}
return nil
},
Run: func(cmd *cobra.Command, args []string) {
initApplication(args[0], args[1])
},
}
func initApplication(name string, source string) {
zipFile := getSampleAppsZip()
if zipFile == nil {
return
}
if existingSampleAppsZip == "" { // Indicates we created a temp file now
defer os.Remove(zipFile.Name())
}
createErr := os.Mkdir(name, 0755)
if createErr != nil {
utils.Error("Could not create directory '" + name + "'")
utils.Detail(createErr.Error())
return
}
zipReader, zipOpenError := zip.OpenReader(zipFile.Name())
if zipOpenError != nil {
utils.Error("Could not open sample apps zip '" + zipFile.Name() + "'")
utils.Detail(zipOpenError.Error())
}
defer zipReader.Close()
found := false
for _, f := range zipReader.File {
zipEntryPrefix := "sample-apps-master/" + source + "/"
if strings.HasPrefix(f.Name, zipEntryPrefix) {
found = true
copyError := copy(f, name, zipEntryPrefix)
if copyError != nil {
utils.Error("Could not copy zip entry '" + f.Name + "' to " + name)
utils.Detail(copyError.Error())
return
}
}
}
if !found {
utils.Error("Could not find source application '" + source + "'")
} else {
utils.Success("Created " + name)
}
}
func getSampleAppsZip() *os.File {
if existingSampleAppsZip != "" {
existing, openExistingError := os.Open(existingSampleAppsZip)
if openExistingError != nil {
utils.Error("Could not open existing sample apps zip file '" + existingSampleAppsZip + "'")
utils.Detail(openExistingError.Error())
}
return existing
}
// TODO: Cache it?
utils.Detail("Downloading sample apps ...") // TODO: Spawn thread to indicate progress
zipUrl, _ := url.Parse("https://github.com/vespa-engine/sample-apps/archive/refs/heads/master.zip")
request := &http.Request{
URL: zipUrl,
Method: "GET",
}
response := utils.HttpDo(request, time.Minute * 60, "GitHub")
defer response.Body.Close()
if response.StatusCode != 200 {
utils.Error("Could not download sample apps from github")
utils.Detail(response.Status)
return nil
}
destination, tempFileError := ioutil.TempFile("", "prefix")
if tempFileError != nil {
utils.Error("Could not create a temp file to hold sample apps")
utils.Detail(tempFileError.Error())
}
// destination, _ := os.Create("./" + name + "/sample-apps.zip")
// defer destination.Close()
_, err := io.Copy(destination, response.Body)
if err != nil {
utils.Error("Could not download sample apps from GitHub")
utils.Detail(err.Error())
return nil
}
return destination
}
func copy(f *zip.File, destinationDir string, zipEntryPrefix string) error {
destinationPath := filepath.Join(destinationDir, filepath.FromSlash(strings.TrimPrefix(f.Name, zipEntryPrefix)))
if strings.HasSuffix(f.Name, "/") {
if f.Name != zipEntryPrefix { // root is already created
createError := os.Mkdir(destinationPath, 0755)
if createError != nil {
return createError
}
}
} else {
zipEntry, zipEntryOpenError := f.Open()
if zipEntryOpenError != nil {
return zipEntryOpenError
}
defer zipEntry.Close()
destination, createError := os.Create(destinationPath)
if createError != nil {
return createError
}
_, copyError := io.Copy(destination, zipEntry)
if copyError != nil {
return copyError
}
}
return nil
}
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