Traveler

Traveler is a general-purpose tool for moving your creeps around. Feel free to fork and use in other projects.

Features:

Efficient path-caching and CPU-use (you can see how it compares with creep.moveTo() here)
Ignores creeps in pathing by default which allows for fewer PathFinder calls and single-lane creep movement
Can detect hostile rooms and will path around them once discovered. More info on how to enable detection here
Effective long-range pathing
Lots of options
Visuals

Installation

Download Traveler.ts or Traveler.js or just copy/paste the code in Traveler.js into a new file using the screeps console.
Add a require statement to main.js:
- var Traveler = require('Traveler');
- (in the sim or some private servers you might need to use 'Traveler.js')
Replace situations where you used moveTo with travelTo

    // creep.moveTo(myDestination);
    creep.travelTo(myDestination);

Performance considerations

travelTo creates a new object in creep memory, _trav, which is analogous to the object used by moveTo() for caching the creeps path. For this reason, it will save memory to use either travelTo() or moveTo() with a given creep, but not both.
As with any algorithm where creeps aren't a consideration for pathing by default, you'll have best results when their path has a low chance of including immobile creeps. My creeps rarely reach the "stuck threshold" because I take extra considerations to keep the roads clear.

Documentation

The file itself has comments, and you can also find documentation in the wiki. I'm also looking for feedback and collaboration to improve Traveler, pull requests welcome!

Changelog

2017-06-26

Reorganized type definitions into index.d.ts
Fixed bug where public ramparts were not seen as pathable
Fixed bug that caused exceptions due to non-existant Memory.rooms

2017-06-16

Fixed bug that caused options.preferHighway to not prefer highways

2017-06-05

Fixed bug in the commented line of code that registered whether creeps were in a hostile room or not.
New version of Traveler! See what is different here. The old version can still be found here.

2017-03-10

Fixed a bug where public ramparts were not set as valid positions for pathing in the costmatrix (thanks ricane!)

2017-03-06

Fixed a bug where pathfinder gets needlessly called when using options.range (thanks helam!)

2017-01-17

Fixed bug in code that determines whether a room is SK from roomname

2017-01-15

Eliminated option returnPosition and added returnData
Fixed bug where preferHighway would not produce the intended results
Fixed bug where ignoreCreep behavior was reversed and creeps could not get unstuck