Add Fish prompt

fish/functions/fish_prompt.fish

@@ -0,0 +1,51 @@
+set -g __fish_git_prompt_show_informative_status 1
+set -g __fish_git_prompt_hide_untrackedfiles 1
+
+set -g __fish_git_prompt_color_branch magenta
+set -g __fish_git_prompt_showupstream "informative"
+set -g __fish_git_prompt_char_upstream_ahead " ⇡"
+set -g __fish_git_prompt_char_upstream_behind " ⇣"
+set -g __fish_git_prompt_char_upstream_prefix ""
+
+set -g __fish_git_prompt_char_stagedstate " ●"
+set -g __fish_git_prompt_char_dirtystate " *"
+set -g __fish_git_prompt_char_untrackedfiles ""
+set -g __fish_git_prompt_char_conflictedstate " ✖"
+set -g __fish_git_prompt_char_cleanstate " ✓"
+set __fish_git_prompt_showstashstate true
+
+set -g __fish_git_prompt_color_dirtystate yellow
+set -g __fish_git_prompt_color_stagedstate blue
+set -g __fish_git_prompt_color_invalidstate red
+set -g __fish_git_prompt_color_untrackedfiles $fish_color_normal
+set -g __fish_git_prompt_color_cleanstate green
+set -g ___fish_git_prompt_char_stateseparator " |"
+
+function fish_right_prompt
+	set_color $fish_color_cwd
+	printf (date +"%r ")
+end
+
+function fish_prompt --description 'Write out the prompt'
+	echo -e ""
+	set -l last_status $status
+
+	if not set -q __fish_prompt_normal
+		set -g __fish_prompt_normal (set_color normal)
+	end
+
+	# PWD
+	set_color $fish_color_cwd
+	echo -n (pwd)
+	set_color normal
+
+	printf '%s ' (__fish_git_prompt)
+
+	if not test $last_status -eq 0
+		set_color $fish_color_error
+	end
+
+	set_color magenta
+	printf '\n❯ '
+	set_color normal
+end