Add latexdiff to artifacts

[dariusptrs]

No description provided.

[github-actions]

🤖 The artifacts from this build are available here.

[github-actions]

🤖 The artifacts from this build are available here.

[dariusptrs]

This workflow change additionally runs latexdiff on the .tex files from the executing branch or fork and compares them to the default branch for easier pull request reviews.

I also noticed that the pull request comment does not work with forks and added a "not-so-fancy" continue-on-error : true workaround.

@hofbi Do you think we should just remove the "Comment on PR with artifact link" step or do you have any other suggestion?

[hofbi]

I am fine with removing the comment. It is more a convenience feature, the artifacts are still there.

Regarding the latex diff, could you briefly explain the motivation for this?

For the implementation, I noticed that you are now checking out the base branch. This seems a bit inefficient. I think GH actions provide a very efficient way to give you the actual diff of a PR. Maybe we can make use of this to prevent 2 checkouts.

[dariusptrs]

Alright, I will remove it.

The latex diff should make it more convenient to review changes in a commit or pull request, by running latexdiff on the changed tex file and the original.

I tested this for a current pr in Schaltungstechnik-1-2 and the output is this: Schaltungstechnik_diff.pdf
Red marks deleted text and blue marks newly added text.

I will try to find a more efficient way. But for running latexdiff you usually need the whole .tex files (original and new).

[dariusptrs]

The new approach now only fetches from remote and the files are copied over individually in the for pdf in build/*.pdf loop. Let me know if you like this better.