tsconfig-upgrader.js

var fs = require("fs");
var path = require("path");

var __migrations = [
	inlineSourceMapMigration,
	addDomLibs,
	addIterableToAngularProjects,
	addTnsCoreModulesPathMappings,
];

function migrateProject(tsConfig, tsconfigPath, projectDir) {
	var displayableTsconfigPath = path.relative(projectDir, tsconfigPath);
	__migrations.forEach(function(migration) {
		migration(tsConfig, displayableTsconfigPath, projectDir);
	});
}
exports.migrateProject = migrateProject;

function migrateTsConfig(tsconfigPath, projectDir) {
	var displayableTsconfigPath = path.relative(projectDir, tsconfigPath);

	function withTsConfig(action) {
		var existingConfig = null;
		try {
			var existingConfigContents = fs.readFileSync(tsconfigPath);
			existingConfig = JSON.parse(existingConfigContents);
		} catch (e) {
			console.error("Invalid " + displayableTsconfigPath + ": " + e);
			return;
		}
		action(existingConfig);
		fs.writeFileSync(tsconfigPath, JSON.stringify(existingConfig, null, 4));
	}

	withTsConfig(function(existingConfig) {
		migrateProject(existingConfig, displayableTsconfigPath, projectDir);
	});
}
exports.migrateTsConfig = migrateTsConfig;

function inlineSourceMapMigration(existingConfig, displayableTsconfigPath) {
	if (existingConfig.compilerOptions) {
		if ("sourceMap" in existingConfig["compilerOptions"]) {
			delete existingConfig["compilerOptions"]["sourceMap"];
			console.warn("> Deleted \"compilerOptions.sourceMap\" setting in \"" + displayableTsconfigPath + "\".");
			console.warn("> Inline source maps will be used when building in Debug configuration from now on.");
		}
	}
}

function addIterableToAngularProjects(existingConfig, displayableTsconfigPath, projectDir) {
	var packageJsonPath = path.join(projectDir, "package.json");
	var packageJson = JSON.parse(fs.readFileSync(packageJsonPath));
	var dependencies = packageJson.dependencies || [];

	var hasAngular = Object.keys(dependencies).includes("nativescript-angular");
    var hasRelevantAngularVersion = /[4-9]\.\d+\.\d+/i.test(dependencies["@angular/core"]);
	if (hasAngular && hasRelevantAngularVersion) {
        console.log("Adding 'es2015.iterable' lib to tsconfig.json...");
		addTsLib(existingConfig, "es2015.iterable");
	}
}

function hasModules30(projectDir) {
	function relevantModulesVersion(version) {
		return /[3-9]\.\d+\.\d+/i.test(version);
	}

	function hasRelevantModulesDependency() {
		var packageJsonPath = path.join(projectDir, "package.json");
		var packageJson = JSON.parse(fs.readFileSync(packageJsonPath));
		var dependencies = packageJson.dependencies || [];

		return relevantModulesVersion(dependencies["tns-core-modules"]);
	}

	function hasRelevantModulesPackage() {
		var packageJsonPath = path.join(projectDir, "node_modules", "tns-core-modules", "package.json");
		if (!fs.existsSync(packageJsonPath)) {
			return false;
		}

		var packageJson = JSON.parse(fs.readFileSync(packageJsonPath));
		return relevantModulesVersion(packageJson.version);
	}

	return hasRelevantModulesDependency() || hasRelevantModulesPackage();
}
exports.hasModules30 = hasModules30;

function addDomLibs(existingConfig, displayableTsconfigPath, projectDir) {
	if (hasModules30(projectDir)) {
		console.log("Adding 'es6' lib to tsconfig.json...");
		addTsLib(existingConfig, "es6");
		console.log("Adding 'dom' lib to tsconfig.json...");
		addTsLib(existingConfig, "dom");
	}
}

function addTsLib(existingConfig, libName) {
	if (existingConfig.compilerOptions) {
		var options = existingConfig.compilerOptions;
		if (!options.lib) {
			options.lib = [];
		}
		if (!options.lib.find(function(l) {
				return libName.toLowerCase() === l.toLowerCase();
			})) {
			options.lib.push(libName);
		}
	}
}

function addTnsCoreModulesPathMappings(existingConfig, displayableTsconfigPath, projectDir) {
	if (hasModules30(projectDir)) {
		console.log("Adding tns-core-modules path mappings lib to tsconfig.json...");
		existingConfig["compilerOptions"] = existingConfig["compilerOptions"] || {};
		var compilerOptions = existingConfig["compilerOptions"];
		compilerOptions["baseUrl"] = ".";
		compilerOptions["paths"] = compilerOptions["paths"] || {};
		compilerOptions["paths"]["*"] = compilerOptions["paths"]["*"] || [
			"./node_modules/tns-core-modules/*",
			"./node_modules/*"
		];
	}
}