terraform-plan-parser | Command line utility and JavaScript API | Infrastructure Automation library

By default Terraform uses terminal escape sequences to highlight parts of the output with simple formatting such as colors or a bold typeface.

In order to reproduce that result exactly in the context of GitHub would require translating the terminal escape sequences into a form that GitHub is able to render.

Unfortunately GitHub comments are written in GitHub-flavored Markdown, which doesn't support any direct way to create colored text similar to Terraform's plan output at the time when I'm write this. Therefore I know of no easy way to reproduce the text formatting from the Terraform plan output in a GitHub comment.

If you run terraform plan with the -no-color option then it will skip the terminal escape sequences and produce plain-text output that you could include in a preformatted text block in your Markdown comment. However, that output will therefore not include the text formatting you normally see in your terminal.

If you are willing to write some custom formatting code to present the Terraform plan in a different format for your GitHub comments, you can obtain a JSON representation of the plan by saving the plan to disk and then reading it with terraform show: