I was traveling around and decided that right clicking with a shovel was over-rated so i created this which perfectly spawns paths underneath the player:
-you can also replace minecraft:grass_path with whatever you like. such as lava for a nice lava moat around your place and what not. great for repairing holes in the ground from blown up tnt and stuff aswell. but it only fills 1 block under so it wont fill up the whole hole, but it works for a nice cover, all you gotta do is walk straight over where the hole is and it will fill it. also you can jump to create mountains and things like that (the + pattern alone creates a nicer looking mountain, although it is longer to walk out a mountain that way).
For 1 command and 1 command block: (replace gurujive with your name in-game) (all credits to Proliex7)