Github user jasongin commented on a diff in the pull request: https://github.com/apache/cordova-android/pull/240#discussion_r45385875 --- Diff: bin/templates/cordova/lib/builders/GradleBuilder.js --- @@ -211,3 +212,54 @@ module.exports = GradleBuilder; function isAutoGenerated(file) { return fs.existsSync(file) && fs.readFileSync(file, 'utf8').indexOf(MARKER) > 0; } + +/** + * A special superspawn-like implementation, required to workaround the issue + * with java printing some necessary information to stderr instead of stdout. + * This function redirects all stderr messages to current process stdout. See + * https://issues.apache.org/jira/browse/CB-9971 for explanation. + * + * @param {String} cmd A command to spawn + * @param {String[]} args Command arguments. Note that on Windows arguments + * will be concatenated into string and passed to 'cmd.exe' along with '/s' + * and '/c' swithces for proper space-in-path handling + * + * @return {Promise} A promise, rejected with error message, if + * underlying command exits with nonzero exit code, fulfilled otherwise + */ +function spawnWithStderrRedirect(cmd, args) { + var opts = { stdio: 'pipe' }; + + if (process.platform === 'win32') { + // Work around spawn not being able to find .bat files. + var joinedArgs = [cmd] + .concat(args) + .map(function(a){ + // Add quotes to arguments which contains whitespaces + if (/^[^"].* .*[^"]/.test(a)) return '"' + a + '"'; + return a; + }).join(' '); + + args = ['/s', '/c'].concat('"' + joinedArgs + '"'); + cmd = 'cmd'; + opts.windowsVerbatimArguments = true; + } + + return Q.Promise(function (resolve, reject) { + var proc = child_process.spawn(cmd, args, opts); + + proc.stdout.on('data', process.stdout.write.bind(process.stdout)); + proc.stderr.on('data', function (data) { + var isRedirectNeeded = data.toString().match(/^Picked up _JAVA_OPTIONS: /i); --- End diff -- /regex/.test(str) is faster when all you need is a boolean result, not the detailed info that match() returns.
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