Add "INIT INFO" property substitutions

Update the "INIT INFO section" of `launch.script` to include
`initInfoProvides`, `initInfoShortDescription` and `initInfoDescription`
property substitutions.

The Maven plugin has been updated to populate substitutions with
`${project.artifactId}`, `${project.name}` and `${project.description}`.

Fixes gh-4245

spring-boot-docs/src/main/asciidoc/deployment.adoc

@@ -454,6 +454,28 @@ the default behavior in a script or on the command line:
  in the script.
 |===
 
+In addition, the following properties can be changed when the script is written by using
+the `embeddedLaunchScriptProperties` option of the Spring Boot Maven or Gradle plugins.
+
+[cols="1,6"]
+|===
+|Name |Description
+
+|`mode`
+|The script mode. Defaults to `auto`.
+
+|`initInfoProvides`
+|The `Provides` section of "`INIT INFO`". Defaults to `spring-boot-application` for Gradle
+and to `${project.artifactId}` for Maven.
+
+|`initInfoShortDescription`
+|The `Short-Description` section of "`INIT INFO`". Defaults to `Spring Boot Application`
+for Gradle and to `${project.name}` for Maven.
+
+|`initInfoDescription`
+|The `Description` section of "`INIT INFO`". Defaults to `Spring Boot Application` for
+Gradle and to `${project.description}` (falling back to `${project.name}`) for Maven.
+|===
 
 
 [[deployment-script-customization-conf-file]]

spring-boot-tools/spring-boot-loader-tools/src/main/resources/org/springframework/boot/loader/tools/launch.script

@@ -10,13 +10,13 @@
 #
 
 ### BEGIN INIT INFO
-# Provides:          spring-boot-application
+# Provides:          {{initInfoProvides:spring-boot-application}}
 # Required-Start:    $remote_fs $syslog $network
 # Required-Stop:     $remote_fs $syslog $network
 # Default-Start:     2 3 4 5
 # Default-Stop:      0 1 6
-# Short-Description: Spring Boot Application
-# Description:       Spring Boot Application
+# Short-Description: {{initInfoShortDescription:Spring Boot Application}}
+# Description:       {{initInfoDescription:Spring Boot Application}}
 # chkconfig:         2345 99 01
 ### END INIT INFO
 

spring-boot-tools/spring-boot-maven-plugin/src/it/jar-executable/pom.xml

@@ -4,6 +4,8 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.springframework.boot.maven.it</groupId>
 	<artifactId>jar-executable</artifactId>
+	<name>MyFullyExecutableJarName</name>
+	<description>MyFullyExecutableJarDesc</description>
 	<version>0.0.1.BUILD-SNAPSHOT</version>
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

spring-boot-tools/spring-boot-maven-plugin/src/it/jar-executable/verify.groovy

@@ -2,6 +2,7 @@ import java.io.*;
 import org.springframework.boot.maven.*;
 
 Verify.verifyJar(
-	new File( basedir, "target/jar-executable-0.0.1.BUILD-SNAPSHOT.jar" ), "some.random.Main", "Spring Boot Startup Script"
-);
+	new File( basedir, "target/jar-executable-0.0.1.BUILD-SNAPSHOT.jar" ),
+	"some.random.Main", "Spring Boot Startup Script", "MyFullyExecutableJarName",
+	"MyFullyExecutableJarDesc");
 

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/RepackageMojo.java

@@ -248,11 +248,36 @@ public class RepackageMojo extends AbstractDependencyFilterMojo {
 	private LaunchScript getLaunchScript() throws IOException {
 		if (this.executable || this.embeddedLaunchScript != null) {
 			return new DefaultLaunchScript(this.embeddedLaunchScript,
-					this.embeddedLaunchScriptProperties);
+					buildLaunchScriptProperties());
 		}
 		return null;
 	}
 
+	private Properties buildLaunchScriptProperties() {
+		Properties properties = new Properties();
+		if (this.embeddedLaunchScriptProperties != null) {
+			properties.putAll(this.embeddedLaunchScriptProperties);
+		}
+		putIfMissing(properties, "initInfoProvides", this.project.getArtifactId());
+		putIfMissing(properties, "initInfoShortDescription", this.project.getName(),
+				this.project.getArtifactId());
+		putIfMissing(properties, "initInfoDescription", this.project.getDescription(),
+				this.project.getName(), this.project.getArtifactId());
+		return properties;
+	}
+
+	private void putIfMissing(Properties properties, String key,
+			String... valueCandidates) {
+		if (!properties.containsKey(key)) {
+			for (String candidate : valueCandidates) {
+				if (candidate != null && candidate.length() > 0) {
+					properties.put(key, candidate);
+					return;
+				}
+			}
+		}
+	}
+
 	/**
 	 * Archive layout types.
 	 */