What to do with vendor when switching branches?

Question

git

There is a master branch with composer.json, composer.lock and vendor which is itself excluded from git.
Created a new branch, updated json and lock. As a result, Vendor has changed a lot and is no longer functional in the master branch.

Since I have to switch from branch to branch very often, this leads to a bunch of additional steps, either copying the vendor-backup folder, or running composer Install every time, which is incredibly annoying. Is there any easier way to solve this?

Answer 1

Make several vendor_branchname folders, and instead of the vendor folder, a symlink to one of them.
When switching branches, change the symlink. This can be automated by writing a post-checkout hook , for example.

Answer 2

if branches are fundamentally different, for example, master and develop,
then create two sites master.site.loc and develop.site.loc
and develop in parallel