Day 1 part 1 complete

build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
     kotlin("jvm") version "1.3.61"
     application
     kotlin("kapt") version "1.3.61"
+    id("com.github.johnrengelman.shadow") version "5.2.0"
 }
 
 group = "dev.acicchetti"
@@ -18,12 +19,19 @@ repositories {
 val arrowVersion = "0.10.3"
 dependencies {
     implementation(kotlin("stdlib-jdk8"))
+
+    implementation("com.github.ajalt:clikt:2.3.0")
+
     implementation("io.arrow-kt:arrow-core:$arrowVersion")
     implementation("io.arrow-kt:arrow-syntax:$arrowVersion")
     implementation("io.arrow-kt:arrow-optics:$arrowVersion")
     kapt("io.arrow-kt:arrow-meta:$arrowVersion")
 }
 
+application {
+    mainClassName = "CliParserKt"
+}
+
 tasks {
     compileKotlin {
         kotlinOptions.jvmTarget = "1.8"

gradlew

@@ -1,5 +1,21 @@
 #!/usr/bin/env sh
 
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
 ##############################################################################
 ##
 ##  Gradle start up script for UN*X
@@ -28,7 +44,7 @@ APP_NAME="Gradle"
 APP_BASE_NAME=`basename "$0"`
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD="maximum"
@@ -109,8 +125,8 @@ if $darwin; then
     GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
 fi
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
     APP_HOME=`cygpath --path --mixed "$APP_HOME"`
     CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
     JAVACMD=`cygpath --unix "$JAVACMD"`

gradlew.bat

@@ -1,3 +1,19 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
 @if "%DEBUG%" == "" @echo off
 @rem ##########################################################################
 @rem
@@ -14,7 +30,7 @@ set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome

justfile

@@ -0,0 +1,5 @@
+run day inputFile: build
+    java -jar ./build/libs/adventOfCode2019-1.0-SNAPSHOT-all.jar --day-to-run={{day}} --input-file={{inputFile}}
+
+build:
+    ./gradlew clean shadowJar

src/main/kotlin/CliParser.kt

@@ -0,0 +1,25 @@
+import com.github.ajalt.clikt.core.CliktCommand
+import com.github.ajalt.clikt.parameters.options.option
+import com.github.ajalt.clikt.parameters.options.required
+import com.github.ajalt.clikt.parameters.types.path
+import day1.Day1
+import java.nio.file.Path
+import kotlin.RuntimeException
+
+class CliParser: CliktCommand() {
+    private val dayToRun: String by option(help = "Day to Run. Can be either an int (1) or a String (Day1)").required()
+    private val inputFile: Path by option().path().required()
+
+    override fun run() {
+        println("dayToRun = $dayToRun")
+        println("inputFile = $inputFile")
+        when(dayToRun.replace("Day", "")) {
+            "1" -> println(Day1().run(inputFile))
+            else -> throw RuntimeException("Day not implementation yet")
+        }
+    }
+}
+
+fun main(args: Array<String>) {
+    CliParser().main(args)
+}

src/main/kotlin/day1/Day1.kt

@@ -2,11 +2,16 @@ package day1
 
 import java.nio.file.Files
 import java.nio.file.Path
+import java.util.stream.Collectors
 
 class Day1 {
-    fun loadFile(inputFile: Path): List<String> {
-        return Files.readAllLines(inputFile)
+    fun run(inputFile: Path): Long {
+        return loadFile(inputFile).parallelStream()
+            .map { it.toLong().div(3).minus(2) }
+            .collect(Collectors.summingLong { it } )
     }
 
-
+    private fun loadFile(inputFile: Path): List<String> {
+        return Files.readAllLines(inputFile)
+    }
 }