BuildScriptHelper.java

package com.bladecoder.engineeditor.setup;

import java.io.BufferedWriter;
import java.io.IOException;
import java.util.List;

import com.bladecoder.engineeditor.setup.DependencyBank.ProjectType;

public class BuildScriptHelper {

	private static int indent = 0;

	public static void addBuildScript(List<ProjectType> projects, BufferedWriter wr) throws IOException {
		write(wr, "buildscript {");
		// repos
		write(wr, "repositories {");
		
		write(wr, DependencyBank.mavenCentral);
		write(wr, DependencyBank.jCenter);
		write(wr, "}");
		
		// dependencies
		write(wr, "dependencies {");
		if (projects.contains(ProjectType.HTML)) {
			write(wr, "classpath \"" + DependencyBank.gwtPluginImport + "\"");
		}
		if (projects.contains(ProjectType.ANDROID)) {
			write(wr, "classpath \"" + DependencyBank.androidPluginImport + "\"");
		}
		if (projects.contains(ProjectType.IOS)) {
			write(wr,
					"classpath \"" + DependencyBank.roboVMPluginImport + "\"");
		}
		write(wr, "}");
		write(wr, "}");
		space(wr);
	}

	public static void addAllProjects(BufferedWriter wr) throws IOException {
		write(wr, "allprojects {");
		write(wr, "apply plugin: \"eclipse\"");
		write(wr, "apply plugin: \"idea\"");
		space(wr);
		write(wr, "repositories {");
		write(wr, DependencyBank.mavenCentral);
		write(wr, "maven { url \"" + DependencyBank.libGDXSnapshotsUrl + "\" }");
		write(wr, "maven { url \"" + DependencyBank.libGDXReleaseUrl + "\" }");
		write(wr, "}");
		space(wr);
		write(wr, "		task setVersion << {");
		write(wr, "	    	println \"Set version $project.version in BladeEngine.properties\"");
		space(wr);
		write(wr, "	    	def props = new Properties()");
		write(wr, "			def propFile = project.file(\"../android/assets/BladeEngine.properties\");");
		write(wr, "			props.load(new FileReader(propFile))");
		write(wr, "			props.\"version\" = version");
		write(wr, "			props.\"bladeEngineVersion\" = bladeEngineVersion");
		write(wr, "			props.\"gdxVersion\" = gdxVersion");
		write(wr, "			props.\"roboVMVersion\" = roboVMVersion");
		space(wr);
		write(wr, "			def writer = new FileWriter(propFile)");
		write(wr, "	   		try {");
		write(wr, "	      		props.store(writer, null)");
		write(wr, "	      		writer.flush()");
		write(wr, "	   		} finally {");
		write(wr, "	      		writer.close()");
		write(wr, "	   		}");
		write(wr, "		}");
		space(wr);
		write(wr, "}");
	}

	public static void addProject(ProjectType project, List<Dependency> dependencies, BufferedWriter wr)
			throws IOException {
		space(wr);
		write(wr, "project(\":" + project.getName() + "\") {");
		for (String plugin : project.getPlugins()) {
			write(wr, "apply plugin: \"" + plugin + "\"");
		}
		space(wr);
		addConfigurations(project, wr);
		space(wr);
		addDependencies(project, dependencies, wr);
		space(wr);
		if (project.equals(ProjectType.CORE)) {
			write(wr, "		processResources.finalizedBy(setVersion)");
			space(wr);
		} else if (project.equals(ProjectType.ANDROID)) {
			write(wr, "		preBuild.finalizedBy(setVersion)");
			space(wr);
		}

		write(wr, "}");
	}

	private static void addDependencies(ProjectType project, List<Dependency> dependencyList, BufferedWriter wr)
			throws IOException {
		write(wr, "dependencies {");
		if (!project.equals(ProjectType.CORE)) {
			write(wr, "compile project(\":" + ProjectType.CORE.getName() + "\")");
		}
		for (Dependency dep : dependencyList) {
			if (dep.getDependencies(project) == null)
				continue;
			for (String moduleDependency : dep.getDependencies(project)) {
				if (moduleDependency == null)
					continue;
				if ((project.equals(ProjectType.ANDROID)) && moduleDependency.contains("native")) {
					write(wr, "natives \"" + moduleDependency + "\"");
				} else {
					if (moduleDependency.startsWith("fileTree("))
						write(wr, "compile " + moduleDependency);
					else
						write(wr, "compile \"" + moduleDependency + "\"");
				}
			}
		}
		write(wr, "}");
	}

	private static void addConfigurations(ProjectType project, BufferedWriter wr) throws IOException {
		if (project.equals(ProjectType.IOS) || project.equals(ProjectType.ANDROID)) {
			write(wr, "configurations { natives }");
		}
	}

	private static void write(BufferedWriter wr, String input) throws IOException {
		int delta = StringUtils.countMatches(input, '{') - StringUtils.countMatches(input, '}');
		indent += delta *= 4;
		indent = clamp(indent);
		if (delta > 0) {
			wr.write(StringUtils.repeat(" ", clamp(indent - 4)) + input + "\n");
		} else if (delta < 0) {
			wr.write(StringUtils.repeat(" ", clamp(indent)) + input + "\n");
		} else {
			wr.write(StringUtils.repeat(" ", indent) + input + "\n");
		}
	}

	private static void space(BufferedWriter wr) throws IOException {
		wr.write("\n");
	}

	private static int clamp(int indent) {
		if (indent < 0) {
			return 0;
		}
		return indent;
	}

	static class StringUtils {

		public static int countMatches(String input, char match) {
			int count = 0;
			for (int i = 0; i < input.length(); i++) {
				if (input.charAt(i) == match) {
					count++;
				}
			}
			return count;
		}

		public static String repeat(String toRepeat, int count) {
			String repeat = "";
			for (int i = 0; i < count; i++) {
				repeat += toRepeat;
			}
			return repeat;
		}
	}

}