OSXScriptBuilder.java

package com.inet.gradle.setup.dmg;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.attribute.PosixFilePermission;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

import com.inet.gradle.setup.Template;
import com.inet.gradle.setup.abstracts.Application;

/**
 * Create scripts from templates and replace placeholders
 * according to configuration/application
 * 
 * @author gamma
 *
 */
public class OSXScriptBuilder extends Template {

    private ArrayList<OSXScriptBuilder> scripts = new ArrayList<OSXScriptBuilder>();

    /**
     * Create an OSX script using the specified template
     * 
     * @param template to create script from
     * @throws IOException in case of errors
     */
    public OSXScriptBuilder( String template ) throws IOException {
        super( template );
    }

    /**
     * Creates an instance and concatenates the script from the input lines
     * 
     * @param script input lines
     */
    public OSXScriptBuilder( ArrayList<String> script ) {
        super( script );
    }

    /**
     * Create an OSX script using the specified template
     * 
     * @param application to use for initial setup
     * @param template to create script from
     * @throws IOException in case of errors
     */
    public OSXScriptBuilder( Application application, String template ) throws IOException {
        super( template );

        setPlaceholder( "executable", application.getExecutable() );
        setPlaceholder( "displayName", application.getDisplayName() );
        setPlaceholder( "serviceName", application.getMainClass() );

        setPlaceholder( "mainClass", application.getMainClass() );
        setPlaceholder( "mainJar", application.getMainJar() );
        setPlaceholder( "workingDir", application.getWorkDir() );
    }

    /**
     * Add another subscript. These will be inserted at the {{script}} tokens
     * 
     * @param script to add
     */
    public void addScript( OSXScriptBuilder script ) {
        scripts.add( script );
    }

    /**
     * Create a string containing all subscripts
     * 
     * @return string of all the scripts.
     */
    public String toString() {

        StringBuilder sb = new StringBuilder();
        for( OSXScriptBuilder osxScriptBuilder : scripts ) {
            if( osxScriptBuilder == null ) {
                continue;
            }
            sb.append( osxScriptBuilder.toString() );
        }

        setPlaceholder( "script", sb.toString() );
        return super.toString();
    }

    /**
     * Write file and set permissions
     * 
     * @param file to write to
     * @throws IOException that can occur
     */
    public void writeTo( File file ) throws IOException {

        try (FileWriter writer = new FileWriter( file )) {
            writer.write( toString() );
        }

        super.writeTo( file );
        Set<PosixFilePermission> perms = new HashSet<PosixFilePermission>();
        perms.add( PosixFilePermission.OWNER_READ );
        perms.add( PosixFilePermission.OWNER_WRITE );
        perms.add( PosixFilePermission.GROUP_READ );
        perms.add( PosixFilePermission.OTHERS_READ );
        perms.add( PosixFilePermission.OWNER_EXECUTE );
        perms.add( PosixFilePermission.GROUP_EXECUTE );
        perms.add( PosixFilePermission.OTHERS_EXECUTE );
        Files.setPosixFilePermissions( file.toPath(), perms );
    }

    @Override
    public OSXScriptBuilder setPlaceholder( String placeholder, String content ) {
        super.setPlaceholder( placeholder, content );
        return this;
    }
}