asciidoctor maven issue - pom.xml (https://github.com/asciidoctor/asciidoctor-maven-plugin/issues/199)

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>me.ntfc</groupId>
    <artifactId>asciidoc-diagrams-issue</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

        <!-- taken from asciidoctorj's 1.5.4 build.gradle -->
        <jruby.version>1.7.21</jruby.version>
        <asciidoctor-maven-plugin.version>1.5.3</asciidoctor-maven-plugin.version>
    </properties>

    <profiles>
        <profile>
            <id>docs</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <build>
                <defaultGoal>process-resources</defaultGoal>
                <plugins>
                    <plugin>
                        <groupId>de.saumya.mojo</groupId>
                        <artifactId>gem-maven-plugin</artifactId>
                        <version>1.0.10</version>
                        <configuration>
                            <jrubyVersion>${jruby.version}</jrubyVersion>
                            <gemHome>${project.build.directory}/gems</gemHome>
                            <gemPath>${project.build.directory}/gems</gemPath>
                        </configuration>
                        <executions>
                            <execution>
                                <goals>
                                    <goal>initialize</goal>
                                </goals>
                            </execution>
                        </executions>
                    </plugin>
                    <plugin>
                        <groupId>org.asciidoctor</groupId>
                        <artifactId>asciidoctor-maven-plugin</artifactId>
                        <version>${asciidoctor-maven-plugin.version}</version>
                        <dependencies>
                            <dependency>
                                <groupId>org.jruby</groupId>
                                <artifactId>jruby-complete</artifactId>
                                <version>${jruby.version}</version>
                            </dependency>
                        </dependencies>
                        <configuration>
                            <sourceDirectory>src/main/asciidoc</sourceDirectory>
                            <gemPath>${project.build.directory}/gems</gemPath>
                        </configuration>
                        <executions>
                            <execution>
                                <id>generate-issue-html</id>
                                <phase>generate-resources</phase>
                                <goals>
                                    <goal>process-asciidoc</goal>
                                </goals>
                                <configuration>
                                    <sourceDirectory>src/main/asciidoc</sourceDirectory>
                                    <outputDirectory>${project.build.directory}/generated-docs</outputDirectory>
                                    <backend>html5</backend>
                                    <doctype>book</doctype>
                                    <attributes>
                                        <toc>left</toc>
                                    </attributes>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>

            <repositories>
                <repository>
                    <id>rubygems-proxy-releases</id>
                    <name>RubyGems.org Proxy (Releases)</name>
                    <url>http://rubygems-proxy.torquebox.org/releases</url>
                    <releases>
                        <enabled>true</enabled>
                    </releases>
                    <snapshots>
                        <enabled>false</enabled>
                    </snapshots>
                </repository>
            </repositories>

        </profile>
    </profiles>
</project>