Adapted to Fisher 4.x plugin style

fish/theme-t31m/functions/fish_prompt.fish

@@ -0,0 +1,67 @@
+function fish_prompt
+	set -l symbol "λ "
+	set -l code $status
+    set t31m_custom_right (t31m_prompt_right)
+
+    echo -ns "$t31m_custom_right"
+
+	if test -n "$ssh_client"
+		set -l host (hostname -s)
+		set -l who (whoami)
+		echo -n -s (red)"("(cyan)"$who"(red)":"(cyan)"$host"(red)") "(off)
+	end
+
+	if git::is_repo
+		set -l branch (git::branch_name ^/dev/null)
+		set -l ref (git show-ref --head --abbrev | awk '{print substr($0,0,7)}' | sed -n 1p)
+
+        printf '%s ' \U1F6E0
+		echo -n -s (red)"("(off)
+
+		if git::is_stashed
+			echo -n -s (white)"^"(off)
+		end
+
+		if git::is_dirty
+			printf (white)"*"(off)
+		end
+
+		if command git symbolic-ref HEAD > /dev/null ^/dev/null
+			if git::is_staged
+				printf (cyan)"$branch"(off)
+			else
+				printf (yellow)"$branch"(off)
+			end
+		else
+			printf (dim)"$ref"(off)
+		end
+
+		for remote in (git remote)
+			set -l behind_count (echo (command git rev-list $branch..$remote/$branch ^/dev/null | wc -l | tr -d " "))
+			set -l ahead_count (echo (command git rev-list $remote/$branch..$branch ^/dev/null | wc -l | tr -d " "))
+
+			if test $ahead_count -ne 0; or test $behind_count -ne 0; and test (git remote | wc -l) -gt 1
+				echo -n -s " "(orange)$remote(off)
+			end
+
+			if test $ahead_count -ne 0
+				echo -n -s (white)" +"$ahead_count(off)
+			end
+
+			if test $behind_count -ne 0
+				echo -n -s (white)" -"$behind_count(off)
+			end
+		end
+
+		echo -n -s (red)")"(off)
+	end
+
+    set t31m_custom (t31m_prompt)
+
+    # check if latest cmd resulted in exit code 0 (ok)
+	if test "$code" = 0
+		echo -e -n -s "$t31m_custom"(red)"\n$symbol"(off)
+	else
+		echo -e -n -s "$t31m_custom"(dim)"\n$symbol"(off)
+	end
+end