Setup for the maven-gpg-plugin. Fix for "signing failed: Inappropriate ioctl for device".

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* pom.xml fragment for setting up GPG signing.
*
-->
<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">
   
    <profiles>
        <!-- Sign the artifacts with GunuPG -->
        <profile>
            <id>sign</id> 
            <build>
                <pluginManagement>
                    <plugins>
                        <plugin>
                            <groupId>org.apache.maven.plugins</groupId>
                            <artifactId>maven-gpg-plugin</artifactId>
                            <version>1.6</version>
                            <executions>
                                <execution>
                                    <id>sign-artifacts</id>
                                    <phase>verify</phase>
                                    <goals>
                                        <goal>sign</goal>
                                    </goals> 
                                    <configuration>
                                        <gpgArguments>
                                            <arg>--pinentry-mode</arg>
                                            <arg>loopback</arg>
                                        </gpgArguments> 
                                        <passphraseServerId>${gpg.keyname}</passphraseServerId>
                                    </configuration>
                                </execution>
                            </executions>
                        </plugin>
                    </plugins>
                </pluginManagement>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-gpg-plugin</artifactId>
                    </plugin> 
                </plugins> 
            </build>
        </profile>
    </profiles>
</project>

settings.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
*
* settings.xml fragment for enabling GPG signing. 
*
-->
<settings 
    xmlns="http://maven.apache.org/SETTINGS/1.1.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.1.0 
            http://maven.apache.org/xsd/settings-1.1.0.xsd">

    <servers>
        <server>
            <id>KEY_NAME</id>
            <passphrase>PASS_PHRASE</passphrase>
        </server> 
    </servers>
    
    <profiles>
        <profile>
            <id>gpg</id> 
            <properties>
                <gpg.executable>PATH_TO_BINARY</gpg.executable>
                <gpg.keyname>KEY_NAME</gpg.keyname>
            </properties>
        </profile>
    </profiles>
    
    <activeProfiles>
        <activeProfile>gpg</activeProfile> 
    </activeProfiles>
</settings>