-reporter=github-pr-check doesn't work for private repo?

[haya14busa]

failed to run checker: fail to parse diff: GET https://api.github.com/repos/xxx/xxx/pulls/xxx: 403 Resource not accessible by integration []

reviewdog doesn't have necessary permission? It has read permission of pull requests, so i wonder why...

[haya14busa]

oh, i got it.

To get diff, go-github uses application/vnd.github.v3.diff but GitHub app is in preview mode so need to specify "application/vnd.github.machine-man-preview+json"

If i changed the header to "application/vnd.github.machine-man-preview+diff", it works...!

[haya14busa]

reported: google/go-github#924

[haya14busa]

reported to github: https://platform.github.community/t/impossible-to-get-raw-diff-of-pull-request-with-github-installation-token-because-of-confliction-of-accept-header/6145

[haya14busa]

It turns out that the app needs Read-only access to Repository contents to get diff.
Updated the request permission of reviewdog app.