Create patch or diff file from git repository and apply it to another different git repository

Question

I work on WordPress based project and I want to patch my project at each new release version of WP. For this, I want generate a patch between two commits or tags.

For

Answer 1

To produce patch for several commits, you should use format-patch git command, e.g.

git format-patch -k --stdout R1..R2

This will export your commits into patch file in mailbox format.

To generate patch for the last commit, run:

git format-patch -k --stdout HEAD^

Then in another repository apply the patch by am git command, e.g.

git am -3 -k file.patch

See: man git-format-patch and git-am.