wl-yoink is a simple command line tool that copies the contents of a file into your wl-clipboard
wl-copy
make gcc
git clone https://github.com/Kateaa1/wl-yoink && cd wl-yoink && make install
wl-yoink <target file> # Copies file into clipboard
wl-yoink --help
wl-yoink src/main.c