fixed gist direct link generation

[joeleonjr]

Description:

GitHub Gists are scanned using the trufflehog github --repo <gist_url> command, since a gist is just a git repo. At the moment, the GenerateLink function used to craft links to specific files from commit in GitHub repos containing secrets does not work properly for gists. The formatting does not include "blob" or "commit" and the fragment identifier works slightly differently (ex: /#file-filename-txt-L5).

I adjusted the logic so that it generates accurate direct links to gists containing secrets.

Here are two gists to test this out on:

https://gist.github.com/joeleonjr/be68e34b002e236160dbb394bbda86fb (note two different AWS canary tokens leaked at different commits)

https://gist.github.com/joeleonjr/21b3d4460c54d4f8e18a7f71f5d4cb21 (note the file name with multiple extensions...those are converted from "." into "-" by GH)

Checklist:

• Tests passing (make test-community)?
• Lint passing (make lint this requires golangci-lint)?

[mcastorina]

Thanks! Could you also add a test case here?

[joeleonjr]

Thanks! Could you also add a test case here?

Added! Please let me know if you need more.

[mcastorina]

💯