SLATOM-7 check java (#2)

lib/requirements.js

@@ -0,0 +1,91 @@
+/* --------------------------------------------------------------------------------------------
+ * SonarLint for Atom
+ * Copyright (C) 2017 SonarSource SA
+ * [email protected]
+ * Licensed under the LGPLv3 License. See LICENSE.txt in the project root for license information.
+ * ------------------------------------------------------------------------------------------ */
+'use strict';
+
+const cp = require('child_process')
+const path = require('path')
+const fs = require('fs')
+const pathExists = require('path-exists');
+const expandHomeDir = require('expand-home-dir');
+const findJavaHome = require('find-java-home');
+
+const JAVA_BINARY = 'java' + ((process.platform.indexOf('win') === 0) ? '.exe' : '');
+
+exports.java = JAVA_BINARY;
+
+exports.resolve = () =>
+ checkJavaRuntime().then(javaHome =>
+ checkJavaVersion(javaHome).then(javaVersion =>
+ Promise.resolve({ javaHome: javaHome, javaVersion: javaVersion })))
+
+function checkJavaRuntime() {
+ return new Promise((resolve, reject) => {
+ let source;
+ let javaHome = readJavaConfig();
+ if (javaHome) {
+ source = "The 'sonarlint.ls.javaHome' variable defined in settings";
+ } else {
+ javaHome = process.env['JDK_HOME'];
+ if (javaHome) {
+ source = 'The JDK_HOME environment variable';
+ } else {
+ javaHome = process.env['JAVA_HOME'];
+ source = 'The JAVA_HOME environment variable';
+ }
+ }
+ if (javaHome) {
+ javaHome = expandHomeDir(javaHome);
+ if (!pathExists.sync(javaHome)) {
+ openJREDownload(reject, source + ' points to a missing folder');
+ }
+ if (!pathExists.sync(path.resolve(javaHome, 'bin', JAVA_BINARY))){
+ openJREDownload(reject, source + ' does not point to a JRE.');
+ }
+ return resolve(javaHome);
+ }
+ //No settings, let's try to detect as last resort.
+ findJavaHome(function (err, home) {
+ if (err) {
+ openJREDownload(reject, "Java runtime could not be located. Install it and set its location using 'sonarlint.ls.javaHome' variable in settings.");
+ } else {
+ resolve(home);
+ }
+ });
+ });
+}
+
+function readJavaConfig() {
+ return atom.config.get('sonarlint.ls.javaHome');
+}
+
+function checkJavaVersion(javaHome) {
+ return new Promise((resolve, reject) => {
+ const prog = path.resolve(javaHome, 'bin', JAVA_BINARY);
+ if ((fs.statSync(prog).mode & 1) == 0) {
+ openJREDownload(reject, "Java binary not an executable file: " + prog);
+ return;
+ }
+
+ cp.execFile(prog, ['-version'], {}, (error, stdout, stderr) => {
+ if (stderr.indexOf('version "9') > -1) {
+ resolve(9);
+ } if (stderr.indexOf('1.8') < 0) {
+ openJREDownload(reject, 'Java 8 is required to run. Please download and install a JRE 8.');
+ } else {
+ resolve(8);
+ }
+ });
+ });
+}
+
+function openJREDownload(reject, message) {
+ const jreUrl = 'http://www.oracle.com/technetwork/java/javase/downloads/index.html';
+ reject({
+ message: message,
+ description: 'You can get the Java Runtime Environment from ' + jreUrl
+ });
+}

lib/sonarlint.js

@@ -11,7 +11,7 @@ const path = require('path')
 const {AutoLanguageClient, LinterPushV2Adapter} = require('atom-languageclient')
 
 const files = require('./files');
-const javaUtils = require('./java-utils');
+const requirements = require('./requirements');
 
 const ruleDetailsBaseUrl = 'http://www.sonarlint.org/atom/rules/index.html#version=1.0.0'
 
@@ -21,8 +21,19 @@ class SonarLintLanguageServer extends AutoLanguageClient {
  getServerName () { return 'SonarLint' }
 
  startServerProcess () {
+ return requirements.resolve()
+ .catch(error => {
+ atom.notifications.addError(error.message, {dismissable: true, description: error.description})
+ throw error
+ })
+ .then(() => {
+ return this._startServerProcess()
+ })
+ }
+
+ _startServerProcess () {
  const basedir = path.resolve(__dirname, "..")
- const command = javaUtils.java
+ const command = requirements.java
  const args = ['-jar', files.languageServerJar(basedir)]
  let process
 

package.json

@@ -37,8 +37,10 @@
  "files"
  ],
  "dependencies": {
+ "atom-languageclient": "SonarSource/atom-languageclient#f1a0372e163191213edeefa13c8d3f8e7cf7a367",
  "atom-linter": "^10.0.0",
- "atom-languageclient": "SonarSource/atom-languageclient#f1a0372e163191213edeefa13c8d3f8e7cf7a367"
+ "expand-home-dir": "0.0.3",
+ "find-java-home": "^0.1.4"
  },
  "bundledDependencies": [
  "atom-languageclient"