A template for completing Advent of Code challenges in Xcode using Swift. It's a CLI program with a template for each of the 25 days.
Create a new repo using this a template. Because CLI tools can't include nonexecutable files in their binary, the tool has to know the path to the project. This defaults to ~/Documents/AdventOfCode but is easily changed on line 11 of AdventOfCodeKit/Entry.swift. I'm assuming this will only ever be run from within Xcode to facilitate debugging so there is very little error handling for the execution harness.
The tool takes 3 arguments detailed below. Input can either be copy-pasted into the correct DayX/input file or by suppling a year and cookie parameter for the tool to fetch your input for you. This will only happen if the input file for that day is empty, and will save the fetched input to that file so it won't make another request each time you run the tool. If you're not using the auto input fetching, remove the -y and -c parameters from the scheme.
Identifies the day you want to run. Used to select the correct DayX folder to get both executable code and input data. If not provided, will use your system date adjusted to EST to get the current day. If provided, you'll need to change this each day before starting the next challenge.
Identifies the year you want to run. Used only when dynamically fetching your input. Also requires -c parameter to function. If not provided, will use your system date adjusted to EST to get the current year
The cookie value used to dynamically fetch your input. Used only when dynamically fetching your input.
You can retrieve this by opening any input file on the Advent of Code site and using the developer tools Network tool. Reload the page with the tool open, select input and copy the entire value of the Cookie header including session=. Duplicate /AdventOfCode/Secrets.example.xcconfig and rename it to /AdventOfCode/Secrets.xcconfig then paste it after the = on the only line. The cookies seem to be good for 30 days so if you do this at the end of November, you shouldn't need to touch it again
Included in each DayX folder is a Tests file. You can use this to test your code against example inputs provided in the challenges. By default it will run tests for all the days when you Test but you can select only certain days using AdventOfCode.xctestplan at the project root
When you run the program, you'll get a line indicating which day is running to confirm you have the correct parameter. After it's finished your result will be printed on it's own line and also copied to your pasteboard for easy submitting. I don't care about keeping part 1 results around once I start on part 2 so only a single result will ever be printed