Adding npm-based formatters typescript-formatter (tsfmt) and prettier

.ci/ci.sh

@@ -2,6 +2,7 @@
 
 # Do the Gradle build
 ./gradlew build || exit 1
+./gradlew npmTest || exit 1
 
 if [ "$TRAVIS_REPO_SLUG" == "diffplug/spotless" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ] && [ "$TRAVIS_BRANCH" == "master" ]; then
 	# Make sure that all pom are up-to-date

.travis.yml

@@ -1,6 +1,10 @@
 language: java
 jdk:
-- oraclejdk8
+  - oraclejdk8
+env:
+  - NODE_VERSION="6.10.2"
+before_install:
+  - nvm install $NODE_VERSION
 install: true
 script:
   - ./.ci/ci.sh

README.md

@@ -12,7 +12,7 @@ output = [
 [![License Apache](https://img.shields.io/badge/license-apache-brightgreen.svg)](https://tldrlegal.com/license/apache-license-2.0-(apache-2.0))
 <!---freshmark /shields -->
 
-Spotless can format &lt;java | kotlin | scala | sql | groovy | markdown | license headers | anything> using &lt;gradle | maven | anything>.
+Spotless can format &lt;java | kotlin | scala | sql | groovy | javascript | flow | typeScript | css | scss | less | jsx | vue | graphql | json | yaml | markdown | license headers | anything> using &lt;gradle | maven | anything>.
 
 - [Spotless for Gradle](plugin-gradle)
 - [Spotless for Maven](plugin-maven)
@@ -46,6 +46,8 @@ lib('java.RemoveUnusedImportsStep')              +'{{yes}}       | {{yes}}
 extra('java.EclipseFormatterStep')               +'{{yes}}       | {{yes}}      | {{no}}  |',
 lib('kotlin.KtLintStep')                         +'{{yes}}       | {{yes}}      | {{no}}  |',
 lib('markdown.FreshMarkStep')                    +'{{yes}}       | {{no}}       | {{no}}  |',
+lib('npm.PrettierFormatterStep')                 +'{{yes}}       | {{no}}       | {{no}}  |',
+lib('npm.TsFmtFormatterStep')                    +'{{yes}}       | {{no}}       | {{no}}  |',
 lib('scala.ScalaFmtStep')                        +'{{yes}}       | {{yes}}       | {{no}}  |',
 lib('sql.DBeaverSQLFormatterStep')               +'{{yes}}       | {{no}}       | {{no}}  |',
 extra('wtp.WtpEclipseFormatterStep')             +'{{yes}}       | {{yes}}      | {{no}}  |',
@@ -71,6 +73,8 @@ extra('wtp.WtpEclipseFormatterStep')             +'{{yes}}       | {{yes}}
 | [`java.EclipseFormatterStep`](lib-extra/src/main/java/com/diffplug/spotless/extra/java/EclipseFormatterStep.java) | :+1:       | :+1:      | :white_large_square:  |
 | [`kotlin.KtLintStep`](lib/src/main/java/com/diffplug/spotless/kotlin/KtLintStep.java) | :+1:       | :+1:      | :white_large_square:  |
 | [`markdown.FreshMarkStep`](lib/src/main/java/com/diffplug/spotless/markdown/FreshMarkStep.java) | :+1:       | :white_large_square:       | :white_large_square:  |
+| [`npm.PrettierFormatterStep`](lib/src/main/java/com/diffplug/spotless/npm/PrettierFormatterStep.java) | :+1:       | :white_large_square:       | :white_large_square:  |
+| [`npm.TsFmtFormatterStep`](lib/src/main/java/com/diffplug/spotless/npm/TsFmtFormatterStep.java) | :+1:       | :white_large_square:       | :white_large_square:  |
 | [`scala.ScalaFmtStep`](lib/src/main/java/com/diffplug/spotless/scala/ScalaFmtStep.java) | :+1:       | :+1:       | :white_large_square:  |
 | [`sql.DBeaverSQLFormatterStep`](lib/src/main/java/com/diffplug/spotless/sql/DBeaverSQLFormatterStep.java) | :+1:       | :white_large_square:       | :white_large_square:  |
 | [`wtp.WtpEclipseFormatterStep`](lib-extra/src/main/java/com/diffplug/spotless/extra/wtp/WtpEclipseFormatterStep.java) | :+1:       | :+1:      | :white_large_square:  |

lib-extra/build.gradle

@@ -23,4 +23,3 @@ dependencies {
 
 // we'll hold the core lib to a high standard
 spotbugs { reportLevel = 'low' } // low|medium|high (low = sensitive to even minor mistakes)
-

lib/src/main/java/com/diffplug/spotless/npm/BlacklistedOptionException.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2016 DiffPlug
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.spotless.npm;
+
+class BlacklistedOptionException extends RuntimeException {
+	private static final long serialVersionUID = -5876348893394153811L;
+
+	public BlacklistedOptionException(String blacklistedOption) {
+		super("The config option '" + blacklistedOption + "' is not supported.");
+	}
+}

lib/src/main/java/com/diffplug/spotless/npm/NodeJSWrapper.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2016 DiffPlug
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.spotless.npm;
+
+import java.io.File;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+class NodeJSWrapper extends ReflectiveObjectWrapper {
+
+	public static final String V8_RUNTIME_CLASS = "com.eclipsesource.v8.V8";
+	public static final String V8_VALUE_CLASS = "com.eclipsesource.v8.V8Value";
+
+	public static final String WRAPPED_CLASS = "com.eclipsesource.v8.NodeJS";
+
+	private static final AtomicBoolean flagsSet = new AtomicBoolean(false);
+
+	public NodeJSWrapper(ClassLoader classLoader) {
+		super(Reflective.withClassLoader(classLoader),
+				reflective -> {
+					final boolean firstRun = flagsSet.compareAndSet(false, true);
+					if (firstRun) {
+						reflective.invokeStaticMethod(V8_RUNTIME_CLASS, "setFlags", "-color=false"); // required to run prettier on windows
+					}
+					return reflective.invokeStaticMethod(WRAPPED_CLASS, "createNodeJS");
+				});
+	}
+
+	public V8ObjectWrapper require(File npmModulePath) {
+		Objects.requireNonNull(npmModulePath);
+		Object v8Object = invoke("require", npmModulePath);
+		return new V8ObjectWrapper(reflective(), v8Object);
+	}
+
+	public V8ObjectWrapper createNewObject() {
+		Object v8Object = reflective().invokeConstructor(V8ObjectWrapper.WRAPPED_CLASS, nodeJsRuntime());
+		V8ObjectWrapper objectWrapper = new V8ObjectWrapper(reflective(), v8Object);
+		return objectWrapper;
+	}
+
+	public V8ObjectWrapper createNewObject(Map<String, Object> values) {
+		Objects.requireNonNull(values);
+		V8ObjectWrapper obj = createNewObject();
+		values.forEach(obj::add);
+		return obj;
+	}
+
+	public V8ArrayWrapper createNewArray(Object... elements) {
+		final V8ArrayWrapper v8ArrayWrapper = this.createNewArray();
+		for (Object element : elements) {
+			v8ArrayWrapper.push(element);
+		}
+		return v8ArrayWrapper;
+	}
+
+	public V8ArrayWrapper createNewArray() {
+		Object v8Array = reflective().invokeConstructor(V8ArrayWrapper.WRAPPED_CLASS, nodeJsRuntime());
+		V8ArrayWrapper arrayWrapper = new V8ArrayWrapper(reflective(), v8Array);
+		return arrayWrapper;
+	}
+
+	public V8FunctionWrapper createNewFunction(V8FunctionWrapper.WrappedJavaCallback callback) {
+		Object v8Function = reflective().invokeConstructor(V8FunctionWrapper.WRAPPED_CLASS,
+				reflective().typed(
+						V8_RUNTIME_CLASS,
+						nodeJsRuntime()),
+				reflective().typed(
+						V8FunctionWrapper.CALLBACK_WRAPPED_CLASS,
+						V8FunctionWrapper.proxiedCallback(callback, reflective())));
+		V8FunctionWrapper functionWrapper = new V8FunctionWrapper(reflective(), v8Function);
+		return functionWrapper;
+	}
+
+	public void handleMessage() {
+		invoke("handleMessage");
+	}
+
+	private Object nodeJsRuntime() {
+		return invoke("getRuntime");
+	}
+
+	public Object v8NullValue(Object value) {
+		if (value == null) {
+			return reflective().staticField(V8_VALUE_CLASS, "NULL");
+		}
+		return value;
+	}
+
+	public boolean isV8NullValue(Object v8Object) {
+		return reflective().staticField(V8_VALUE_CLASS, "NULL") == v8Object;
+	}
+}

lib/src/main/java/com/diffplug/spotless/npm/NpmConfig.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2016 DiffPlug
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.spotless.npm;
+
+import java.io.Serializable;
+
+class NpmConfig implements Serializable {
+
+	private static final long serialVersionUID = -1866722789779160491L;
+
+	private final String packageJsonContent;
+
+	private final String npmModule;
+
+	public NpmConfig(String packageJsonContent, String npmModule) {
+		this.packageJsonContent = packageJsonContent;
+		this.npmModule = npmModule;
+	}
+
+	public String getPackageJsonContent() {
+		return packageJsonContent;
+	}
+
+	public String getNpmModule() {
+		return npmModule;
+	}
+}

lib/src/main/java/com/diffplug/spotless/npm/NpmExecutableResolver.java

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2016 DiffPlug
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.diffplug.spotless.npm;
+
+import static com.diffplug.spotless.npm.PlatformInfo.OS.WINDOWS;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.Optional;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
+
+/**
+ * Utility class to resolve an npm binary to be used by npm-based steps.
+ * Tries to find an npm executable in the following order:
+ * <ol>
+ *     <li>from System-Property {@code npm.exec} (unverified)</li>
+ *     <li>from Environment-Properties in the following order:</li>
+ *     	<ol>
+ *     	    <li> from NVM_BIN environment variable, if available </li>
+ *     	    <li> from NVM_SYMLINK environment variable, if available </li>
+ *     	    <li> from NODE_PATH environment variable, if available </li>
+ *     	    <li>fallback: PATH environment variable</li>
+ *     	</ol>
+ * </ol>
+ */
+class NpmExecutableResolver {
+
+	private NpmExecutableResolver() {
+		// no instance
+	}
+
+	static String npmExecutableName() {
+		String npmName = "npm";
+		if (PlatformInfo.normalizedOS() == WINDOWS) {
+			npmName += ".cmd";
+		}
+		return npmName;
+	}
+
+	static Supplier<Optional<File>> systemProperty() {
+		return () -> Optional.ofNullable(System.getProperty("npm.exec"))
+				.map(File::new);
+	}
+
+	static Supplier<Optional<File>> environmentNvmBin() {
+		return () -> Optional.ofNullable(System.getenv("NVM_BIN"))
+				.map(File::new)
+				.map(binDir -> new File(binDir, npmExecutableName()))
+				.filter(File::exists)
+				.filter(File::canExecute);
+	}
+
+	static Supplier<Optional<File>> environmentNvmSymlink() {
+		return pathListFromEnvironment("NVM_SYMLINK");
+	}
+
+	static Supplier<Optional<File>> environmentNodepath() {
+		return pathListFromEnvironment("NODE_PATH");
+	}
+
+	static Supplier<Optional<File>> environmentPath() {
+		return pathListFromEnvironment("PATH");
+	}
+
+	static Optional<File> tryFind() {
+		return Stream.of(systemProperty(),
+				environmentNvmBin(),
+				environmentNvmSymlink(),
+				environmentNodepath(),
+				environmentPath())
+				.map(Supplier::get)
+				.filter(Optional::isPresent)
+				.map(Optional::get)
+				.findFirst();
+	}
+
+	private static Supplier<Optional<File>> pathListFromEnvironment(String environmentPathListName) {
+		return () -> {
+			String pathList = System.getenv(environmentPathListName);
+			if (pathList != null) {
+				return Arrays.stream(pathList.split(System.getProperty("path.separator", ":")))
+						.map(File::new)
+						.map(dir -> dir.getName().equalsIgnoreCase("node_modules") ? dir.getParentFile() : dir)
+						.map(dir -> new File(dir, npmExecutableName()))
+						.filter(File::exists)
+						.filter(File::canExecute)
+						.findFirst();
+
+			}
+			return Optional.empty();
+		};
+	}
+
+}