build: create basic projects

Signed-off-by: Kengo TODA <skypencil@gmail.com>

.gitattributes

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+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+

.github/workflows/ci.yaml

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+name: Continuous Integration
+on:
+  push:
+    branches:
+      - main
+  pull_request: {}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version-file: .java-version
+      - name: Build with Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: build --scan

.gitignore

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+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build

.java-version

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+21
+

backend/build.gradle.kts

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+plugins {
+    id("jp.skypencil.kosmo.kotlin-application-conventions")
+}
+
+application {
+    mainClass.set("jp.skypencil.kosmo.backend.AppKt")
+}

backend/src/main/kotlin/jp/skypencil/kosmo/backend/Coordinator.kt

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+package jp.skypencil.kosmo.backend
+
+class Coordinator {
+}

buildSrc/build.gradle.kts

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+plugins {
+    `kotlin-dsl`
+}
+
+repositories {
+    gradlePluginPortal()
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.10")
+}

buildSrc/settings.gradle.kts

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+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This settings file is used to specify which projects to include in your build-logic build.
+ */
+
+rootProject.name = "buildSrc"

buildSrc/src/main/kotlin/jp.skypencil.kosmo.kotlin-application-conventions.gradle.kts

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+plugins {
+    id("jp.skypencil.kosmo.kotlin-common-conventions")
+
+    application
+}

buildSrc/src/main/kotlin/jp.skypencil.kosmo.kotlin-common-conventions.gradle.kts

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+plugins {
+    id("org.jetbrains.kotlin.jvm")
+}
+
+repositories {
+    mavenCentral()
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(17))
+    }
+}
+
+tasks.named<Test>("test") {
+    useJUnitPlatform()
+}

buildSrc/src/main/kotlin/jp.skypencil.kosmo.kotlin-library-conventions.gradle.kts

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+plugins {
+    id("jp.skypencil.kosmo.kotlin-common-conventions")
+    `java-library`
+}

frontend/build.gradle.kts

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+plugins {
+    id("jp.skypencil.kosmo.kotlin-application-conventions")
+}

frontend/src/main/kotlin/jp/skypencil/kosmo/list/LinkedList.kt

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+/*
+ * This Kotlin source file was generated by the Gradle 'init' task.
+ */
+package jp.skypencil.kosmo.list
+
+class LinkedList {
+    private var head: Node? = null
+
+    fun add(element: String) {
+        val newNode = Node(element)
+
+        val it = tail(head)
+        if (it == null) {
+            head = newNode
+        } else {
+            it.next = newNode
+        }
+    }
+
+    private fun tail(head: Node?): Node? {
+        var it: Node?
+
+        it = head
+        while (it?.next != null) {
+            it = it.next
+        }
+
+        return it
+    }
+
+    fun remove(element: String): Boolean {
+        var result = false
+        var previousIt: Node? = null
+        var it: Node? = head
+        while (!result && it != null) {
+            if (0 == element.compareTo(it.data)) {
+                result = true
+                unlink(previousIt, it)
+                break
+            }
+            previousIt = it
+            it = it.next
+        }
+
+        return result
+    }
+
+    private fun unlink(previousIt: Node?, currentIt: Node) {
+        if (currentIt == head) {
+            head = currentIt.next
+        } else {
+            previousIt?.next = currentIt.next
+        }
+    }
+
+    fun size(): Int {
+        var size = 0
+
+        var it = head
+        while (it != null) {
+            ++size
+            it = it.next
+        }
+
+        return size
+    }
+
+    fun get(idx: Int): String {
+        var index = idx
+        var it = head
+        while (index > 0 && it != null) {
+            it = it.next
+            index--
+        }
+
+        if (it == null) {
+            throw IndexOutOfBoundsException("Index is out of range")
+        }
+
+        return it.data
+    }
+
+    private data class Node(val data: String) {
+        var next: Node? = null
+    }
+}

gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists