You don't have to install powerline and fonts from github to get fish with powerline.
The Ubuntu repo already has some packages. Just install them with apt.
Tested on Ubuntu 17.04
apt install fish powerline
This pulls in fonts-powerline python-powerline python-psutil python3-powerline
add the following lines to ~/.config/fish/config.fish
set fish_function_path $fish_function_path "/usr/share/powerline/bindings/fish"
source /usr/share/powerline/bindings/fish/powerline-setup.fish
powerline-setup
and then start a new instance of fish by typing fish
Presumably if you have a different set up or distro, you can use grep/find
to get the above information.
# these commands work with bash or fish
cd /
find -name fish 2>&1 | grep bindings
# which returns
./usr/share/powerline/bindings/fish
# and then
find -name '*.fish' 2>&1 | grep -e 'powerline-setup'
# returns
./usr/share/powerline/bindings/fish/powerline-setup.fish