Use os-lib, Add command to run all problems

aoc/src/dev/ctsk/aoc/Main.scala

@@ -10,9 +10,7 @@ val solvers = Map[Int, Solver](
   5 -> Day05
 )
 
-@main def main(day: String, input: String): Unit =
-  solvers.get(day.toInt) match
-    case Some(solver) =>
+def runSolver(solver: Solver, input: os.Path): Unit =
   val (timings, solution) = solver.run(input)
   sys.env.get("AOC_BENCH") match
     case Some(_) =>
@@ -23,5 +21,15 @@ val solvers = Map[Int, Solver](
       println(f"Part 1: ${solution.p1}%15s ${timings.p1}%15s μs")
       println(f"Part 2: ${solution.p2}%15s ${timings.p2}%15s μs")
 
-    case None =>
-      println(s"Day $day not solved")
+@main def main(day: String, input: String): Unit =
+  val num = """(\d+)""".r
+  day match
+    case "all" =>
+      solvers.foreach { case (day, solver) =>
+        runSolver(solver, os.pwd / os.RelPath(input) / f"$day%02d.in")
+      }
+    case num(_) =>
+      solvers.get(day.toInt) match
+        case Some(solver) => runSolver(solver, os.pwd / os.RelPath(input))
+        case None         => println(s"Day $day not solved")
+    case _ => println(day)

aoc/src/dev/ctsk/aoc/Solution.scala

@@ -5,7 +5,7 @@ case class Timings(prep: Long, p1: Long, p2: Long)
 case class Solution(p1: Object, p2: Object)
 
 abstract class Solver(day: Int):
-  def run(input: String): (Timings, Solution)
+  def run(input: os.Path): (Timings, Solution)
 
   def timed[A](solution: => A): (Long, A) =
     val start = System.nanoTime()

aoc/src/dev/ctsk/aoc/days/Day01.scala

@@ -5,10 +5,9 @@ import dev.ctsk.aoc._
 object Day01 extends Solver(1):
   type Input = (Array[Int], Array[Int])
 
-  def pre(input: String): Input =
-    io.Source
-      .fromFile(input)
-      .getLines()
+  def pre(input: os.Path): Input =
+    os.read
+      .lines(input)
       .map { case s"$i   $j" => (i.toInt, j.toInt) }
       .toArray
       .unzip match { case (left, right) => (left.sorted, right.sorted) }
@@ -22,7 +21,7 @@ object Day01 extends Solver(1):
     val counts = right.groupMapReduce(identity)(identity)(_ + _)
     left.map(n => counts.getOrElse(n, 0)).sum
 
-  def run(input: String): (Timings, Solution) =
+  def run(input: os.Path): (Timings, Solution) =
     val (pre_time, pre_input) = timed { pre(input) }
     val (p1_time, p1_solution) = timed { part1(pre_input) }
     val (p2_time, p2_solution) = timed { part2(pre_input) }

aoc/src/dev/ctsk/aoc/days/Day02.scala

@@ -3,10 +3,9 @@ package dev.ctsk.aoc.days
 import dev.ctsk.aoc._
 
 object Day02 extends Solver(2):
-  def pre(input: String): List[List[Int]] =
-    io.Source
-      .fromFile(input)
-      .getLines()
+  def pre(input: os.Path): List[List[Int]] =
+    os.read
+      .lines(input)
       .map(line => line.split(" ").map(_.toInt).toList)
       .toList
 
@@ -25,7 +24,7 @@ object Day02 extends Solver(2):
   def part2(lists: List[List[Int]]): Int =
     lists.count(list => safeWithGap(list) || safeWithGap(list.reverse))
 
-  def run(input: String): (Timings, Solution) =
+  def run(input: os.Path): (Timings, Solution) =
     val (pre_time, pre_input) = timed { pre(input) }
     val (p1_time, p1_solution) = timed { part1(pre_input) }
     val (p2_time, p2_solution) = timed { part2(pre_input) }

aoc/src/dev/ctsk/aoc/days/Day03.scala

@@ -24,8 +24,8 @@ object Day03 extends Solver(3):
       }
       ._2
 
-  def run(input: String): (Timings, Solution) =
-    val in = io.Source.fromFile(input).mkString
+  def run(input: os.Path): (Timings, Solution) =
+    val in = os.read(input)
     val (p1_time, p1_solution) = timed { part1(in) }
     val (p2_time, p2_solution) = timed { part2(in) }
 

aoc/src/dev/ctsk/aoc/days/Day04.scala

@@ -1,16 +1,13 @@
 package dev.ctsk.aoc.days
 
 import dev.ctsk.aoc._
-import scala.compiletime.ops.double
-import scala.reflect.ClassTag
 import scala.collection.mutable.ArrayBuffer
-import java.util.concurrent.ForkJoinPool
 
 object Day04 extends Solver(4):
   private val XMAS = "XMAS".r
   private val REV_XMAS = "XMAS".reverse.r
 
-  def diagonals[A: ClassTag](m: Vector[Vector[A]]): Vector[Vector[A]] =
+  def diagonals[A](m: Vector[Vector[A]]): Vector[Vector[A]] =
     val diagonals = Vector.fill(m.length + m(0).length - 1)(ArrayBuffer[A]())
 
     for
@@ -30,27 +27,19 @@ object Day04 extends Solver(4):
       lines.transpose,
       diagonals(lines),
       diagonals(lines.reverse)
-    ).flatMap(_.toList).map(count).sum
+    ).flatMap(_.map(count)).sum
 
   def part2(grid: Vector[Vector[Char]]): Int =
-    var count = 0
-
-    for
+    (for
       i <- 1 until grid.length - 1
       j <- 1 until grid(i).length - 1
       if grid(i)(j) == 'A'
-        & (grid(i - 1)(j - 1) + grid(i + 1)(j + 1) == 'S' + 'M')
-        & (grid(i - 1)(j + 1) + grid(i + 1)(j - 1) == 'S' + 'M')
-    do count += 1
+        && grid(i - 1)(j - 1) + grid(i + 1)(j + 1) == 'S' + 'M'
+        && grid(i - 1)(j + 1) + grid(i + 1)(j - 1) == 'S' + 'M'
+    yield ()).length
 
-    count
-
-  def run(input: String): (Timings, Solution) =
-    var in = io.Source
-      .fromFile(input)
-      .getLines()
-      .map { line => line.toVector }
-      .toVector
+  def run(input: os.Path): (Timings, Solution) =
+    var in = os.read.lines(input).map { line => line.toVector }.toVector
 
     val (p1_time, p1_solution) = timed { part1(in) }
     val (p2_time, p2_solution) = timed { part2(in) }

aoc/src/dev/ctsk/aoc/days/Day05.scala

@@ -4,9 +4,8 @@ import dev.ctsk.aoc._
 import scala.annotation.nowarn
 
 object Day05 extends Solver(5):
-  def pre(input: String) =
-    val Array(rulesStr, updatesStr) =
-      io.Source.fromFile(input).mkString.split("\n\n")
+  def pre(input: os.Path) =
+    val Array(rulesStr, updatesStr) = os.read(input).split("\n\n")
 
     val rules = rulesStr.linesIterator
       .map(rule => {
@@ -20,7 +19,7 @@ object Day05 extends Solver(5):
 
     (rules, updates)
 
-  def run(input: String): (Timings, Solution) =
+  def run(input: os.Path): (Timings, Solution) =
     val (pre_time, (rules, updates)) = timed { pre(input) }
 
     @nowarn("msg=match may not be exhaustive")

build.mill

@@ -4,7 +4,7 @@ import mill._, scalalib._
 
 object aoc extends ScalaModule {
   def scalaVersion = "3.5.2"
-  // def ivyDeps = Agg(
-  //   ivy"org.scala-lang.modules::scala-parallel-collections:1.0.4"
-  // )
+  def ivyDeps = Agg(
+    ivy"com.lihaoyi::os-lib:0.11.3"
+  )
 }