setup 2025

2025/.env

@@ -0,0 +1 @@
+SESSION_COOKIE=53616c7465645f5f72c2167a886b5ad84b79c7bd0781bfbf2cfd4814bcee55666ef54a7ff19e973043098359e30df3263605e989b7faf91439b0cfc453358b41

2025/.formatter.exs

@@ -0,0 +1,4 @@
+# Used by "mix format"
+[
+  inputs: ["{mix,.formatter}.exs", "{config,lib,test}/**/*.{ex,exs}"]
+]

2025/.gitignore

@@ -0,0 +1,25 @@
+# The directory Mix will write compiled artifacts to.
+/_build/
+
+# If you run "mix test --cover", coverage assets end up here.
+/cover/
+
+# The directory Mix downloads your dependencies sources to.
+/deps/
+
+# Where third-party dependencies like ExDoc output generated docs.
+/doc/
+
+# Temporary files, for example, from tests.
+/tmp/
+
+# If the VM crashes, it generates a dump, let's ignore it too.
+erl_crash.dump
+
+# Also ignore archive artifacts (built via "mix archive.build").
+*.ez
+
+# Ignore package tarball (built via "mix hex.build").
+aoc-*.tar
+
+/priv/inputs/*.txt

2025/README.md

@@ -0,0 +1,9 @@
+# Advent of Code 2025
+
+|  S  |  M  |  T  |  W  |  T  |  F  |  S  |
+| :-: | :-: | :-: | :-: | :-: | :-: | :-: |
+|     |  1  |  2  |   3 |   4 |   5 |   6 |
+|  7  |  8  |  9  |  10 |  11 |  12 |     |
+
+
+

2025/config/config.exs

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+import Config
+
+import_config "#{config_env()}.exs"

2025/config/dev.exs

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+import Config

2025/config/prod.exs

@@ -0,0 +1 @@
+import Config

2025/config/runtime.exs

@@ -0,0 +1,3 @@
+import Config
+
+config :aoc, session_cookie: System.fetch_env!("SESSION_COOKIE")

2025/config/test.exs

@@ -0,0 +1 @@
+import Config

2025/lib/aoc.ex

@@ -0,0 +1,45 @@
+defmodule Aoc do
+  defmacro input do
+    day =
+      case Regex.run(~r/^Elixir\.Aoc\.Day(\d+)$/, "#{__CALLER__.module}", capture: :all_but_first) do
+        [day_str] ->
+          String.to_integer(day_str)
+
+        _ ->
+          raise "`input/0` must be called from a module of the format `Aoc.Day<n>`. Called in module #{inspect(__CALLER__.module)}"
+      end
+
+    quote do
+      input(unquote(day))
+    end
+  end
+
+  def input(day) do
+    input_file = :code.priv_dir(:aoc) |> Path.join("inputs/#{day}.txt")
+
+    if File.exists?(input_file) do
+      File.read!(input_file)
+    else
+      input = download_input(day)
+
+      File.write!(input_file, input)
+
+      input
+    end
+  end
+
+  def lines(str) do
+    String.split(str, "\n", trim: true)
+  end
+
+  defp download_input(day) do
+    Req.request!(
+      url: "https://adventofcode.com/2025/day/#{day}/input",
+      headers: [cookie: "session=#{session_cookie()}"]
+    ).body
+  end
+
+  defp session_cookie do
+    Application.fetch_env!(:aoc, :session_cookie)
+  end
+end

2025/lib/aoc/day_1.ex

@@ -0,0 +1 @@
+

2025/mise.toml

@@ -0,0 +1,6 @@
+[env]
+_.file = '.env'
+
+[tools]
+elixir = "1.19.4-otp-28"
+erlang = "28.2"

2025/mix.exs

@@ -0,0 +1,27 @@
+defmodule Aoc.MixProject do
+  use Mix.Project
+
+  def project do
+    [
+      app: :aoc,
+      version: "0.1.0",
+      elixir: "~> 1.19",
+      start_permanent: Mix.env() == :prod,
+      deps: deps()
+    ]
+  end
+
+  # Run "mix help compile.app" to learn about applications.
+  def application do
+    [
+      extra_applications: [:logger]
+    ]
+  end
+
+  # Run "mix help deps" to learn about dependencies.
+  defp deps do
+    [
+      {:req, "~> 0.5.16"}
+    ]
+  end
+end

2025/mix.lock

@@ -0,0 +1,11 @@
+%{
+  "finch": {:hex, :finch, "0.20.0", "5330aefb6b010f424dcbbc4615d914e9e3deae40095e73ab0c1bb0968933cadf", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.6.2 or ~> 1.7", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 1.1", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "2658131a74d051aabfcba936093c903b8e89da9a1b63e430bee62045fa9b2ee2"},
+  "hpax": {:hex, :hpax, "1.0.3", "ed67ef51ad4df91e75cc6a1494f851850c0bd98ebc0be6e81b026e765ee535aa", [:mix], [], "hexpm", "8eab6e1cfa8d5918c2ce4ba43588e894af35dbd8e91e6e55c817bca5847df34a"},
+  "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
+  "mime": {:hex, :mime, "2.0.7", "b8d739037be7cd402aee1ba0306edfdef982687ee7e9859bee6198c1e7e2f128", [:mix], [], "hexpm", "6171188e399ee16023ffc5b76ce445eb6d9672e2e241d2df6050f3c771e80ccd"},
+  "mint": {:hex, :mint, "1.7.1", "113fdb2b2f3b59e47c7955971854641c61f378549d73e829e1768de90fc1abf1", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1 or ~> 0.2.0 or ~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "fceba0a4d0f24301ddee3024ae116df1c3f4bb7a563a731f45fdfeb9d39a231b"},
+  "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},
+  "nimble_pool": {:hex, :nimble_pool, "1.1.0", "bf9c29fbdcba3564a8b800d1eeb5a3c58f36e1e11d7b7fb2e084a643f645f06b", [:mix], [], "hexpm", "af2e4e6b34197db81f7aad230c1118eac993acc0dae6bc83bac0126d4ae0813a"},
+  "req": {:hex, :req, "0.5.16", "99ba6a36b014458e52a8b9a0543bfa752cb0344b2a9d756651db1281d4ba4450", [:mix], [{:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.17", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 2.0.6 or ~> 2.1", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "974a7a27982b9b791df84e8f6687d21483795882a7840e8309abdbe08bb06f09"},
+  "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
+}

2025/test/test_helper.exs

@@ -0,0 +1 @@
+ExUnit.start()

README.md

@@ -16,6 +16,7 @@
 | [2022] | **14/50** 🌟 | Elixir, Haskell |
 | [2023] | **19/50** 🌟 | Elixir, Haskell |
 | [2024] | **30/50** 🌟 | Elixir |
+| [2025] | **0/24** 🌟 | Elixir |
 | **Total** | **186** 🌟| |
 
 [2015]: ./2015
@@ -25,3 +26,4 @@
 [2022]: ./2022
 [2023]: ./2023
 [2024]: ./2024
+[2025]: ./2025