Initial commit

.gitignore

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+src/*.txt
+*.swp

README.md

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+# Advent of Code 2023
+
+Here are my solutions to the Advent of Code[^aoc] 2023 challenges. I did the first few days in Kotlin, then switched over to Lua for the rest.
+
+[^aoc]:
+    [Advent of Code][aoc] – An annual event of Christmas-oriented programming challenges started December 2015.
+    Every year since then, beginning on the first day of December, a programming puzzle is published every day for twenty-five days.
+    You can solve the puzzle and provide an answer using the language of your choice.
+
+[aoc]: https://adventofcode.com

src/_template.lua

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+require "util"
+
+function part1(input)
+    return #input
+end
+
+function part2(input)
+    return #input
+end
+
+local test_input = read_test_input()
+assert_equals(part1(test_input), 0)
+local input = read_input()
+print(part1(input))
+assert_equals(part2(test_input), 0)
+print(part2(input))

src/util.lua

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+function get_day_name()
+    return arg[0]:sub(1,5)
+end
+
+function read_input()
+    local day = get_day_name()
+    return read_file(day .. ".txt")
+end
+
+function read_test_input()
+    local day = get_day_name()
+    return read_file(day .. "_test.txt")
+end
+
+function read_file(file)
+    local lines = {}
+    for line in io.lines(file) do
+        lines[#lines + 1] = line
+    end
+    return lines
+end
+
+function assert_equals(actual, expected, message)
+    if actual ~= expected then
+        print(string.format("assert failed: %s", message or ""))
+        print(string.format("\texpected: %s", expected))
+        print(string.format("\tactual: %s", actual))
+        os.exit(1)
+    end
+end