mavenを使ってpostgresql-42.2.12.jarとpostgresql-42.2.12-sources.jarをビルドした時のメモ

#mavenを使ってpostgresql-42.2.12.jarとpostgresql-42.2.12-sources.jarをビルドした時のメモ

##用意するもの

 1. **pgjdbcソース一式**

	https://github.com/pgjdbc/pgjdbc
	アーカイブをダウンロードしpgjdbc-masterに展開

 2. **mavenとhttpdを用意**

	https://maven.apache.org/install.html
	maven本体とapacheが普通に使えるように設定
	apacheはローカルリポジトリでも使用するためのhttpd。C:/Apache24にインストール

 3. **JDK 1.8**

	環境変数のJAVA_HOMEの設定は必須

##ビルド
 1. cd pgjdbc
 2. pom.xmlファイルを作成を以下のように作成しコマンドプロンプトでmvn deployを実行しtargetにjarが生成。

```　XML
<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (c) 2019, PostgreSQL Global Development Group
  ~ See the LICENSE file in the project root for more information.
  -->
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <packaging>jar</packaging>
    <name>PostgreSQL JDBC Driver - JDBC 4.2</name>
    <version>42.2.12</version>
    <description>Java JDBC 4.2 (JRE 8+) driver for PostgreSQL database</description>
    <url>https://github.com/pgjdbc/pgjdbc</url>

    <licenses>
        <license>
            <name>BSD-2-Clause</name>
            <url>https://jdbc.postgresql.org/about/license.html</url>
        </license>
    </licenses>

    <organization>
        <name>PostgreSQL Global Development Group</name>
        <url>https://jdbc.postgresql.org/</url>
    </organization>

    <properties>
        <!-- Require JDK 1.8 or later -->
        <javac.target>1.8</javac.target>
        <encoding>UTF-8</encoding>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <project.resources.sourceEncoding>UTF-8</project.resources.sourceEncoding>
        <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
        <maven-surefire-plugin.version>2.22.2</maven-surefire-plugin.version>
        <maven-jar-plugin.version>2.6</maven-jar-plugin.version>
        <!--
        <maven-javadoc-plugin.version>3.0.1</maven-javadoc-plugin.version>
        -->
		<maven.test.skip>true</maven.test.skip>
		<skipTest>true</skipTest>
    </properties>

	<repositories>
		<repository>
			<id>private.repository</id>
			<name>PrivateRepository</name>
			<url>http://127.0.0.1/maven/repo/</url>
			<snapshots>
				<enabled>false</enabled>
			</snapshots>
		</repository>
		<repository>
			<id>private.repository-snapshot</id>
			<name>PrivateRepository-snapshot</name>
			<url>http://127.0.0.1/maven/repo-snapshot/</url>
			<releases>
				<enabled>false</enabled>
			</releases>
			<snapshots>
				<enabled>true</enabled>
				<updatePolicy>always</updatePolicy>
			</snapshots>
		</repository>

	</repositories>

	<distributionManagement>
		<repository>
			<id>deploy-repository</id>
			<name>deployRepository</name>
			<url>file:///C:/Apache24/htdocs/home/maven/repo</url>
		</repository>
		<snapshotRepository>
			<id>deploy-repository</id>
			<name>deployRepository</name>
			<url>file:///C:/Apache24/htdocs/home/maven/repo-snapshot</url>
		</snapshotRepository>
	</distributionManagement>



    <dependencies>
		<dependency>
		    <groupId>net.java.dev.jna</groupId>
		    <artifactId>jna-platform</artifactId>
		    <version>4.0.0</version>
		</dependency>
		<dependency>
		    <groupId>com.github.dblock.waffle</groupId>
		    <artifactId>waffle-jna</artifactId>
		    <version>1.8.1</version>
		</dependency>

		<dependency>
		    <groupId>org.osgi</groupId>
		    <artifactId>org.osgi.framework</artifactId>
		    <version>1.9.0</version>
		    <scope>provided</scope>
		</dependency>
		<dependency>
		    <groupId>org.osgi</groupId>
		    <artifactId>org.osgi.service.jdbc</artifactId>
		    <version>1.0.0</version>
		    <scope>provided</scope>
		</dependency>

        <dependency>
            <groupId>com.ongres.scram</groupId>
            <artifactId>client</artifactId>
            <version>2.0</version>
        </dependency>
        <dependency>
            <groupId>se.jiderhamn</groupId>
            <artifactId>classloader-leak-test-framework</artifactId>
            <version>1.1.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.6.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-params</artifactId>
            <version>5.6.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>5.6.2</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.vintage</groupId>
            <artifactId>junit-vintage-engine</artifactId>
            <version>5.6.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
        
		<plugin>
		    <groupId>org.apache.maven.plugins</groupId>
		    <artifactId>maven-source-plugin</artifactId>
		    <executions>
		        <execution>
		            <id>attach-sources</id>
		            <goals>
		                <goal>jar</goal>
		            </goals>
		        </execution>
		    </executions>
		   </plugin>
	        <plugin>
	            <groupId>org.apache.maven.plugins</groupId>
	            <artifactId>maven-assembly-plugin</artifactId>
	            <version>2.6</version>
	            <configuration>
	                <descriptorRefs>
	                    <descriptorRef>jar-with-dependencies</descriptorRef>
	                </descriptorRefs>
	            </configuration>
	        </plugin>
        
	        <plugin>
	            <groupId>org.codehaus.mojo</groupId>
	            <artifactId>build-helper-maven-plugin</artifactId>
	            <executions>
	                <execution>
	                    <phase>generate-sources</phase>
	                    <goals>
	                        <goal>add-source</goal>
	                    </goals>
	                    <configuration>
	                        <sources>
	                            <source>src/main/version</source>
	                        </sources>
	                    </configuration>
	                </execution>
	            </executions>
	        </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.22.2</version>
                <configuration>
                    <argLine>-Xmx1536m</argLine>
                    <systemPropertyVariables>
                        <build.properties.relative.path>.</build.properties.relative.path>
                    </systemPropertyVariables>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.2.0</version>
                <configuration>
                    <archive>
                        <manifestFile>src/main/resources/META-INF/MANIFEST.MF</manifestFile>
                    </archive>
                </configuration>
            </plugin>
<!--
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-javadoc-plugin</artifactId>
                <version>3.2.0</version>
                <executions>
                    <execution>
                        <id>attach-javadocs</id>
                        <goals>
                            <goal>jar</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
-->
        </plugins>
    </build>
</project>

```

##maven
mavenは非常に便利でビルドに必要なjarをかき集めてくれます。
jarのバージョンの違いで動かないという問題をなくせます。
pom.xmlの敷居が高いので導入するのに理解が必要です。
pom.xmlを完成してしまえばターゲットになるjarをコマンド一つで作り出せます。