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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
// vespa clone command
// author: bratseth
package cmd
import (
"archive/zip"
"io"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"path/filepath"
"strings"
"time"
"github.com/spf13/cobra"
"github.com/vespa-engine/vespa/client/go/util"
)
// Set this to test without downloading this file from github
var existingSampleAppsZip string
var listApps bool
func init() {
rootCmd.AddCommand(cloneCmd)
cloneCmd.Flags().BoolVarP(&listApps, "list", "l", false, "List available sample applications")
}
var cloneCmd = &cobra.Command{
// TODO: "application" and "list" subcommands?
Use: "clone sample-application-path target-directory",
Short: "Create files and directory structure for a new Vespa application from a sample application",
Long: `Creates an application package file structure.
The application package is copied from a sample application in https://github.com/vespa-engine/sample-apps`,
Example: "$ vespa clone vespa-cloud/album-recommendation my-app",
DisableAutoGenTag: true,
Run: func(cmd *cobra.Command, args []string) {
if listApps {
apps, err := listSampleApps()
if err != nil {
printErr(err, "Could not list sample applications")
return
}
for _, app := range apps {
log.Print(app)
}
} else {
if len(args) != 2 {
fatalErr(nil, "Expected exactly 2 arguments")
return
}
cloneApplication(args[0], args[1])
}
},
}
func cloneApplication(source string, name string) {
zipFile := getSampleAppsZip()
if zipFile == nil {
return
}
if existingSampleAppsZip == "" { // Indicates we created a temp file now
defer os.Remove(zipFile.Name())
}
zipReader, zipOpenError := zip.OpenReader(zipFile.Name())
if zipOpenError != nil {
printErr(zipOpenError, "Could not open sample apps zip '", color.Cyan(zipFile.Name()), "'")
return
}
defer zipReader.Close()
found := false
for _, f := range zipReader.File {
zipEntryPrefix := "sample-apps-master/" + source + "/"
if strings.HasPrefix(f.Name, zipEntryPrefix) {
if !found { // Create destination directory lazily when source is found
createErr := os.Mkdir(name, 0755)
if createErr != nil {
printErr(createErr, "Could not create directory '", color.Cyan(name), "'")
return
}
}
found = true
copyError := copy(f, name, zipEntryPrefix)
if copyError != nil {
printErr(copyError, "Could not copy zip entry '", color.Cyan(f.Name), "' to ", color.Cyan(name))
return
}
}
}
if !found {
printErr(nil, "Could not find source application '", color.Cyan(source), "'")
} else {
log.Print("Created ", color.Cyan(name))
}
}
func getSampleAppsZip() *os.File {
if existingSampleAppsZip != "" {
existing, openExistingError := os.Open(existingSampleAppsZip)
if openExistingError != nil {
printErr(openExistingError, "Could not open existing sample apps zip file '", color.Cyan(existingSampleAppsZip), "'")
}
return existing
}
// TODO: Cache it?
log.Print(color.Yellow("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, reqErr := util.HttpDo(request, time.Minute*60, "GitHub")
if reqErr != nil {
printErr(reqErr, "Could not download sample apps from GitHub")
return nil
}
defer response.Body.Close()
if response.StatusCode != 200 {
printErr(nil, "Could not download sample apps from GitHub: ", response.StatusCode)
return nil
}
destination, tempFileError := ioutil.TempFile("", "prefix")
if tempFileError != nil {
printErr(tempFileError, "Could not create a temporary file to hold sample apps")
}
// destination, _ := os.Create("./" + name + "/sample-apps.zip")
// defer destination.Close()
_, err := io.Copy(destination, response.Body)
if err != nil {
printErr(err, "Could not download sample apps from GitHub")
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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