Google Apps Script Plugin is a maven plugin to allow uploading, downloading and listing google apps script projects.

• go to https://developers.google.com/oauthplayground/
• Step 1: Select & authorize APIs
  • choose from Drive API: drive, drive.file, drive.scripts
  • Click Authorize APIs
  • Choose an account (login)
• Step 2: Exchange authorization code for tokens
  • click Exchange authorization code for tokens
  • copy Access Token; if access token expired click Refresh access token and copy again

<plugin>
  <groupId>gasp</groupId>
    <artifactId>gasp-maven-plugin</artifactId>
    <version>0.1</version>
	<configuration>
	  <scriptsDir>${basedir}\src\main\resources</scriptsDir>
	  <downloadDir>${basedir}\backup</downloadDir>
	  <projectId>project_id</projectId>
	  <ignoredFiles>
	    <ignoredFile>ignoredFile.gs</ignoredFile>
	  </ignoredFiles>
	</configuration>
</plugin>

• scriptsDir source directory with script files to uploading
• downloadDir directory to download script files
• projectId apps script project ID
• ignoredFiles list of ignored files on uploading

Add plugin repository (if necessary):

<pluginRepositories>
  <pluginRepository>
    <id>gasp-mvn-repo</id>
    <url>https://github.com/marekklis/gasp/raw/mvn_repo/</url>
  </pluginRepository>
</pluginRepositories>

mvn gasp:list -DaccessToken=ya29.1access_token_copied_from_oauthplaygrand

mvn gasp:download -DaccessToken=ya29.1access_token_copied_from_oauthplaygrand

mvn gasp:upload -DaccessToken=ya29.1access_token_copied_from_oauthplaygrand