git-diff | NPM - Returns the git diff of two strings | Version Control System library

I'm using emacs 27.2 and magit 20210406.454. When I show a diff on magit (i.g., on magit-diff) the selected whole hunk is highlighted. How can I disable it?

For example, this is the screen capture when I show the diff on magit:

It shows added lines in green and removed lines in red, which is good. However when I move the cursor to the first hunk, the color of added lines is changed to blue:

The current line is highlighted in yellow. Also, when I move the cursor to the next hunk that has both added lines and removed lines, the color of those lines are changed:

What I'd like to do is to disable highlighting only on added lines and removed lines (i.e., keeping showing those lines in greed and red) while keeping showing the current line in yellow. Is that possible?

I want to show the result of both git diff and git diff --staged . I know this answer (Show both staged & working tree in git diff?) says you can use git status -vv, but it doesn't accept a path argument so I can't do git status -vv -- . Anyone know a way to show both worktree and index diffs for a single path?

I need this solution for a script so I don't mind having to run multiple commands to get the result.

I have a sh file that runs pre-commit stage but I want to exclude some paths but I also want to know how to exclude files that ends with "*Test" for example.

Here's my sh file;

I received a diff patch for a project I'm working on and I want to know if there is a simple way in Visual Studio Code, to apply that diff to the file it is referred to?

Visual Studio Code has added some git support in the last few versions.

I don't want to use git command line tools (I won't reject answers but will not accept them as solutions).

For example, I want to know if I can right click on the main source file and select an option, "Apply diff patch" and it opens a file dialog allowing me to select the diff file and apply the changes.

I also have Github Desktop available to use but that doesn't seem to have an "Apply diff" option either.

Thanks in advance.

I have seen this related post:

How do you take a git diff file, and apply it to a local branch that is a copy of the same repository?

When I run the git command I get an error:

directory$ git apply xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

Update: The error above went away after installing XCode command line tools (more info here, https://www.studytonight.com/post/solved-mac-os-xcrun-error-invalid-active-developer-path-missing-xcrun). But the apply command still seems to have done nothing.

Update2: It appears that I have to address the different folder structure used in the diff patch. See https://stackoverflow.com/a/66041903/441016.

Git Patch for Visual Studio Code looks like what I'm looking for. However, here is the error that I see when using it.

I am using Beyond Compare as my external diff tool. It does not work when I configure it on my new computer in the .gitconfig as I did on other computers. If I specify the extcmd with too many quotes then it does work.

One big difference between now and previous times is that I am using LFS on my new repository.

.gitconfig file:

There is a function defined in /usr/share/zsh/functions/Completion/Unix/_git

In this answer of mine, I have kept from the question an option I didn't know of, namely --oneline applied to git diff instead of git log. But searching for oneline in man git-diff doesn't give any reult. Still git diff --oneline doesn't error.

What is it for?

What is the default git diff tool(and merge tool)?
Where(and how) can I find it out?

I've never set any configuration for git difftool(nor mergetool) explicitly,
so git config --get difftool shows nothing.

The git documentation says(https://git-scm.com/docs/git-difftool):

If the configuration variable diff.tool is not set, git difftool will pick a suitable default.

How can I find out which one it has picked?
How does the algorithm for 'suitable' work?

Let me share the reason why I'm trying to find out the currently picked diff tool by my git:
I've met some weird diff result when I execute git diff(I suspect BOM handling issue).
I'd like to question the vendor(e.g., p4merge) about it,
but not sure if it is p4merge, vimdiff or anything else.

I expect there might be a command like git difftool --current.