fish+powerline

fish-powerline.sh

#!/bin/env bash

set -o errexit -o pipefail -o noclobber -o nounset
# set -x

sudo apt install fish powerline

sudo chsh --shell $(which fish)

FISH_CONFIG_FILE=~/.config/fish/config.fish
if [ ! -f "$FISH_CONFIG_FILE" ]; then
    echo "Fish config file not found: $FISH_CONFIG_FILE"
    exit 1
fi

POWERLINE_FISH_BINDING_DIR='/usr/share/powerline/bindings/fish'
if [ ! -d "$POWERLINE_FISH_BINDING_DIR" ]; then
    echo "Powerline Fish bindings directory not found: $POWERLINE_FISH_BINDING_DIR"
    exit 1
fi

if grep -q "powerline-setup" "$FISH_CONFIG_FILE"; then
    echo "Powerline already setup"
    exit 0
fi

REFERENCE_LINE='# Commands to run in interactive sessions can go here'
# assert that the file has the reference line
if ! grep -q "$REFERENCE_LINE" "$FISH_CONFIG_FILE"; then
    echo "Reference line not found in $FISH_CONFIG_FILE"
    exit 1
fi

POWERLINE_CONFIG_LINES="\n\tset fish_function_path \$fish_function_path $POWERLINE_FISH_BINDING_DIR\n\tsource $POWERLINE_FISH_BINDING_DIR/powerline-setup.fish\n\tpowerline-setup"

sed -i "s|$REFERENCE_LINE|$REFERENCE_LINE$POWERLINE_CONFIG_LINES|" $FISH_CONFIG_FILE

echo "Powerline setup added"