About

Google Apps Script to backup Google Calendar into Google Drive.

The data is saved in iCalendar format with an extension of .ics.

(Back to top)

Usage

Setup

1. Create new project in GAS (Google Apps Script).

2. Copy the following files in this repo to the GAS project.

• main.js
• webapi.js
• index.html

3. Store the Secret Address¹ of Google Calendar.

1. Deploy the GAS project as a web app.
2. Open the web app in your browser.
3. Enter the Secret Address of Google Calendar, and submit it.

Submitted secret address is stored in User Properties² of the GAS project.

User Properties can be accessed only by the user, so your secret is safe.

4. Install GAS trigger

Install GAS trigger to run backup task periodically. main function must be specified in the trigger.

(Back to top)

Customize

Folder in which backup files are saved

Defined as a constant BACKUP_FOLDER_PATH in main.gs. Modify the constant if you want to change the folder.

File name of backups

Generated according to the datetime when the backup run. For example, if backup run at 14:59:30 on October 18, 2021, the file name would be backup_calendar_20211018145930.ics.

File name can also be changed with the constants defined in main.gs.

Expiration for backup files

By default, expilation of backup files is 30 days, and expired files will be trashed.

Expilation days can also be changed with the constant defined in main.gs.

(Back to top)

License

MIT License.

(Back to top)

Contact

Send a direct message to Higama-ya's twitter account: @higama_ya

(Back to top)

Footnotes

1. Secret Address: https://support.google.com/calendar/answer/37648#zippy=%2Cget-your-calendar-view-only ↩

2. User Properties: https://developers.google.com/apps-script/guides/properties#comparison_of_property_stores ↩