1. Build

2. Build Tool

3. Gradle

3-1. 設定

$ sdk install gradle
$ brew install gradle

3-2. 実行

3-2-1. 階層アイテムの作成

$ gradle init  # gradle로 프로젝트 생성. 몇가지 설정들을 선택해주면 된다 
$ tree  # 기본 gradle 생성 자바 프로젝트는 다음과 같은 구조를 가진다 
├── app  # 기본 프로젝트 명 
│   ├── build.gradle  # 빌드 스크립트를 작성하는 곳 
│   └── src  # 소스 코드
│       ├── main  # 프로그램 코드
│       │   ├── java
│       │   │   └── com
│       │   │       └── programmers
│       │   │           └── java
│       │   │               └── App.java
│       │   └── resources
│       └── test  # 테스트 코드
│           ├── java
│           │   └── com
│           │       └── programmers
│           │           └── java
│           │               └── AppTest.java
│           └── resources
├── gradle  # gradle 실행을 위한 런타임 
│   └── wrapper
│       ├── gradle-wrapper.jar
│       └── gradle-wrapper.properties
├── gradlew
├── gradlew.bat
└── settings.gradle  # gradle 설정 파일 

3-2-2. 構築と実行

$ gradle build
Starting a Gradle Daemon (subsequent builds will be faster)

BUILD SUCCESSFUL in 5s
7 actionable tasks: 7 up-to-date

$ gradle run
> Task :app:run
Hello World!

BUILD SUCCESSFUL in 725ms
2 actionable tasks: 1 executed, 1 up-to-date

3-2-3. タスク#タスク#

(...생략...)

tasks.named('test') {
    // Use JUnit Platform for unit tests.
    useJUnitPlatform()
}

$ gradle tasks
> Task :tasks

------------------------------------------------------------
Tasks runnable from root project 'HelloWorld'
------------------------------------------------------------

Application tasks
-----------------
run - Runs this project as a JVM application

Build tasks
-----------
assemble - Assembles the outputs of this project.
build - Assembles and tests this project.
buildDependents - Assembles and tests this project and all projects that depend on it.
buildNeeded - Assembles and tests this project and all projects it depends on.
classes - Assembles main classes.
clean - Deletes the build directory.
jar - Assembles a jar archive containing the main classes.
testClasses - Assembles test classes.

Build Setup tasks
-----------------
init - Initializes a new Gradle build.
wrapper - Generates Gradle wrapper files.

Distribution tasks
------------------
assembleDist - Assembles the main distributions
distTar - Bundles the project as a distribution.
distZip - Bundles the project as a distribution.
installDist - Installs the project as a distribution as-is.

Documentation tasks
-------------------
javadoc - Generates Javadoc API documentation for the main source code.

Help tasks
----------
buildEnvironment - Displays all buildscript dependencies declared in root project 'HelloWorld'.
dependencies - Displays all dependencies declared in root project 'HelloWorld'.
dependencyInsight - Displays the insight into a specific dependency in root project 'HelloWorld'.
help - Displays a help message.
javaToolchains - Displays the detected java toolchains.
outgoingVariants - Displays the outgoing variants of root project 'HelloWorld'.
projects - Displays the sub-projects of root project 'HelloWorld'.
properties - Displays the properties of root project 'HelloWorld'.
tasks - Displays the tasks runnable from root project 'HelloWorld' (some of the displayed tasks may belong to subprojects).

Verification tasks
------------------
check - Runs all checks.
test - Runs the unit tests.

To see all tasks and more detail, run gradle tasks --all

To see more detail about a task, run gradle help --task <task>

3-2-4. Injellij IDEAからのGradle

4.Gradleによる外部依存の管理

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.0'
    implementation 'com.github.javafaker:javafaker:1.0.2'
}

import com.github.javafaker.Faker;

public class Main {
    public static void main(String[] args) {
        // 데모 등을 위해 다양한 랜덤 값을 생성하는 클래스
        Faker faker = new Faker();

        // 직함 생성
        String title = faker.name().title();
        System.out.println(title);
    }
}

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