Read input files from the classpath instead of a relative path

rhaendel · rhaendel · commit e0e7fb40566b · 2025-06-19T11:23:52.000+02:00
This allows reading input files independant from the current working dir.
diff --git a/.gitignore b/.gitignore
@@ -2,7 +2,7 @@
 .idea
 .kotlin/
 build
-src/input/**/*.txt
-!src/input/2024/Day99.txt
+src/main/resources/**/*.txt
+!src/main/resources/2024/Day99.txt
 local.properties
 /.kotlintest/
diff --git a/src/main/kotlin/de/ronny_h/aoc/AdventOfCode.kt b/src/main/kotlin/de/ronny_h/aoc/AdventOfCode.kt
@@ -17,7 +17,7 @@ abstract class AdventOfCode<T>(val year: Int, val day: Int) {
         printAndCheck(input, ::part2, expectedPart2)
     }
 
-    private fun readInput() = Path("src/input/$year/Day${paddedDay()}.txt").readText().trim().lines()
+    fun readInput() = AdventOfCode::class.java.getResource("/$year/Day${paddedDay()}.txt")!!.readText().trim().lines()
 
     private fun paddedDay(): String = day.toString().padStart(2, '0')
 
diff --git a/src/main/resources/2024/Day99.txt b/src/main/resources/2024/Day99.txt

Original file line number	Diff line number	Diff line change
`@@ -17,7 +17,7 @@ abstract class AdventOfCode<T>(val year: Int, val day: Int) {`
`17`	`17`	`printAndCheck(input, ::part2, expectedPart2)`
`18`	`18`	`}`
`19`	`19`
`20`		`- private fun readInput() = Path("src/input/$year/Day${paddedDay()}.txt").readText().trim().lines()`
	`20`	`+ fun readInput() = AdventOfCode::class.java.getResource("/$year/Day${paddedDay()}.txt")!!.readText().trim().lines()`
`21`	`21`
`22`	`22`	`private fun paddedDay(): String = day.toString().padStart(2, '0')`
`23`	`23`