Code cleanup; added FP rules for ESLint

BuildServer/app.js

@@ -20,8 +20,7 @@ const settings = require("./settings");
 
 const app = express();
 
-// All environments
-app.set("port", process.env.PORT || settings.port);
+app.set("port", process.env.PORT || settings.port); // eslint-disable-line no-process-env
 app.set("views", path.join(__dirname, "views"));
 app.set("view engine", "jade");
 app.set("gitpath", settings.gitpath);

BuildServer/lib/builder.js

@@ -62,6 +62,14 @@ const wrapGitLoader = (skipGitLoader) => {
     return (gitLoaderOptions, gitLoaderCallback) => process.nextTick(gitLoaderCallback);
 };
 
+const safeParseJson = (data) => {
+    try {
+        return { "parsed": JSON.parse(data) };
+    } catch (err) {
+        return { err };
+    }
+};
+
 const build = (options, buildCallback) => {
     const url = options.url;
     const owner = options.owner;
@@ -179,17 +187,15 @@ const build = (options, buildCallback) => {
                     return done(readErr, "MBSUnableToRead");
                 }
 
-                let task = null;
+                const { parsed, err } = safeParseJson(data);
 
-                try {
-                    task = JSON.parse(data);
-                } catch (ex) {
+                if (err) {
                     console.log(`Malformed data: ${data}`);
 
-                    return done(ex, "MBSMalformed");
+                    return done(err, "MBSMalformed");
                 }
 
-                return processor.processTask(task, {
+                return processor.processTask(parsed, {
                     branch,
                     exported,
                     owner,

BuildServer/lib/commenter.js

@@ -1,5 +1,6 @@
 "use strict";
 
+const _ = require("underscore");
 const reportProcessor = require("./report-processor");
 const settings = require("../settings");
 
@@ -135,9 +136,9 @@ const checkPullRequest = (options, callback) => {
     });
 };
 
-exports.commentOnPullRequest = (options, callback) => {
-    options.github = settings.createGithub(options.baseRepoOptions.owner);
-    options.headRepoOptions.onTenthAttempt = () => writeComment(options, "Waiting for build to finish...");
+exports.commentOnPullRequest = (originalOptions, callback) => {
+    const optionsGithub = _.extend(originalOptions, { "github": settings.createGithub(originalOptions.baseRepoOptions.owner) });
+    const options = _.extend(optionsGithub, { "onTenthAttempt": () => writeComment(optionsGithub, "Waiting for build to finish...") });
 
     return checkPullRequest(options, () => reportProcessor.getStatusMessageFromRelease(options.app, options.headRepoOptions, (statusMessageErr, statusSuccessMessage) => {
         const escapedErr = String(statusMessageErr || "").substring(0, maxCommentLength)

BuildServer/lib/git/copy.js

@@ -1,11 +1,19 @@
 "use strict";
 
-const EventEmitter = require("events").EventEmitter;
+const EventEmitter = require("events").EventEmitter; // eslint-disable-line fp/no-events
 const path = require("path");
 const fs = require("fs");
 const async = require("async");
 const Copier = require("recursive-tree-copy").Copier;
 
+const safeGetEntries = (tree) => {
+    try {
+        return { "entries": tree.gitTree.entries() };
+    } catch (err) {
+        return { err };
+    }
+};
+
 const gitToFsCopier = new Copier({
     "concurrency": 4,
     "copyLeaf": (entry, targetDir, callback) => {
@@ -36,19 +44,17 @@ const gitToFsCopier = new Copier({
         const emitter = new EventEmitter();
 
         process.nextTick(() => {
-            let entries = null;
+            const { entries, err } = safeGetEntries(tree);
 
-            try {
-                entries = tree.gitTree.entries();
-            } catch (err) {
+            if (err) {
                 return emitter.emit("error", err);
             }
 
             return async.parallel(entries.map((entry) => (callback) => {
                 if (entry.isTree()) {
-                    return entry.getTree((err, subTree) => {
-                        if (err) {
-                            return callback(err);
+                    return entry.getTree((getTreeErr, subTree) => {
+                        if (getTreeErr) {
+                            return callback(getTreeErr);
                         }
 
                         emitter.emit("tree", {
@@ -67,9 +73,9 @@ const gitToFsCopier = new Copier({
                 }
 
                 return callback();
-            }), (err) => {
-                if (err) {
-                    return emitter.emit("error", err);
+            }), (parallelErr) => {
+                if (parallelErr) {
+                    return emitter.emit("error", parallelErr);
                 }
 
                 return emitter.emit("done");

BuildServer/lib/git/loader.js

@@ -3,13 +3,23 @@
 const nodegit = require("nodegit");
 const fse = require("fs-extra");
 const gitToFs = require("./copy").gitToFs;
+
 const mkdirs = (path) => {
     fse.mkdirsSync(path); // eslint-disable-line no-sync
 };
+
 const removedirs = (path) => {
     fse.removeSync(path); // eslint-disable-line no-sync
 };
 
+const fixUrl = (url) => {
+    if (!url.startsWith("https://")) {
+        return url;
+    }
+
+    return `git://${url.substr("https://".length)}`;
+};
+
 /* Example:
 options = {
     "remote": "https://github.com/visionmedia/express.git",
@@ -21,17 +31,13 @@ options = {
  */
 
 module.exports = (options, globalCallback) => {
-    let url = options.remote;
+    const url = fixUrl(options.remote);
     const path = `${options.local}/${options.hash}`;
     const exported = options.exported;
 
     removedirs(path);
     mkdirs(path);
 
-    if (url.startsWith("https://")) {
-        url = `git://${url.substr("https://".length)}`;
-    }
-
     console.log(`Cloning ${url} to ${path}`);
 
     nodegit.Repository.init(path, 1)

BuildServer/lib/report-processor.js

@@ -88,8 +88,6 @@ exports.loadReport = (app, options, callback) => {
 
         const reportFile = path.join(releaseDir, reportFilename);
 
-        options.files = files;
-
         return fs.exists(reportFile, (exists) => {
             if (!exists) {
                 return callback("ReportFileNotFound", options);
@@ -97,23 +95,23 @@ exports.loadReport = (app, options, callback) => {
 
             return readReport(releaseDir, (readErr, report) => {
                 if (readErr) {
-                    return callback(readErr, options);
+                    return callback(readErr, _.extend(options, { files }));
                 }
 
-                options.report = report;
-
-                return callback(null, options);
+                return callback(null, _.extend(options, {
+                    files,
+                    report
+                }));
             });
         });
     });
 };
 
-exports.getStatusMessageFromRelease = (app, options, callback) => {
+exports.getStatusMessageFromRelease = (app, originalOptions, callback) => {
+    const options = _.extend(originalOptions, { "attemptsGetReport": (Number(originalOptions.attemptsGetReport) || Number()) + 1 });
     const releaseDir = path.join(app.get("releasepath"), options.owner, options.reponame, options.branch, options.rev);
     const reportFile = path.join(releaseDir, reportFilename);
 
-    options.attemptsGetReport = (Number(options.attemptsGetReport) || Number()) + 1;
-
     fs.exists(reportFile, (exists) => {
         if (!exists) {
             return setTimeout(() => fs.exists(releaseDir, (dirExists) => {

BuildServer/lib/status-processor.js

@@ -2,7 +2,7 @@
 
 const path = require("path");
 const fs = require("fs");
-
+const _ = require("underscore");
 const reportProcessor = require("./report-processor");
 
 const addBranchInfo = (app, options, callback) => {
@@ -17,10 +17,15 @@ const addBranchInfo = (app, options, callback) => {
             if (err) {
                 return callback(err, options);
             }
-            options.branch = data.toString();
-            options.branchName = options.branch.split("/").pop();
 
-            return callback(null, options);
+            const branch = data.toString();
+            const branchParts = branch.split("/");
+            const branchName = branchParts[branchParts.length - 1];
+
+            return callback(null, _.extend(options, {
+                branch,
+                branchName
+            }));
         });
     });
 };
@@ -37,39 +42,38 @@ const addRevInfo = (app, options, callback) => {
             if (err) {
                 return callback(err, options);
             }
-            options.rev = data.toString();
 
-            return callback(null, options);
+            const rev = data.toString();
+
+            return callback(null, _.extend(options, { rev }));
         });
     });
 };
 
 const parseOptions = (app, options, callback) => {
+    if (options.rev && !(/^[\da-f]{40}$/i).test(options.rev)) {
+        return callback(`Wrong rev format: ${options.rev}`, options);
+    }
+
     const result = {
         "owner": options.owner,
         "reponame": options.reponame
     };
 
-    if (options.rev && !(/^[\da-f]{40}$/i).test(options.rev)) {
-        return callback(`Wrong rev format: ${options.rev}`, options);
-    }
-
     if (options.rev) {
-        result.rev = options.rev;
-
-        return addBranchInfo(app, result, callback);
+        return addBranchInfo(app, _.extend(result, { "rev": options.rev }), callback);
     }
 
     if (/^[\da-f]{40}$/i.test(options.branchName)) {
-        result.rev = options.branchName;
-
-        return addBranchInfo(app, result, callback);
+        return addBranchInfo(app, _.extend(result, { "rev": options.branchName }), callback);
     }
 
-    result.branchName = options.branchName || "master";
-    result.branch = `refs/heads/${result.branchName}`;
+    const branchName = options.branchName || "master";
 
-    return addRevInfo(app, result, callback);
+    return addRevInfo(app, _.extend(result, {
+        "branch": `refs/heads/${branchName}`,
+        branchName
+    }), callback);
 };
 
 exports.getReport = (app, options, callback) => parseOptions(app, options, (err, result) => {

BuildServer/lib/task-processor.js

@@ -1,5 +1,6 @@
 "use strict";
 
+const _ = require("underscore");
 const tasks = require("./tasks");
 
 // TaskProcessor does not look like EventEmitter, so no need to extend EventEmitter and use `emit' here.
@@ -9,9 +10,9 @@ const TaskProcessor = function (task, outerProcessor, callback) {
     }
 
     const that = this;
-    let taskWorker = null;
+    const createTaskWorker = () => tasks[task.type](task.params || {}, that);
     const errors = [];
-    const process = () => taskWorker.process();
+    const process = () => createTaskWorker().process();
     const getOuterPrefix = (prefix) => {
         if (task.name && prefix) {
             return `${task.name}/${prefix}`;
@@ -39,43 +40,48 @@ const TaskProcessor = function (task, outerProcessor, callback) {
     that.processTask = processTask;
     that.done = done;
     that.context = outerProcessor.context;
-
-    const taskImpl = tasks[task.type];
-
-    taskWorker = taskImpl(task.params || {}, that);
-
-    return this;
 };
 
-const pushMessage = (list, message, prefix) => {
-    const parts = prefix.split("/");
-    let innerList = list;
+const pushMessage = (list, message, parts, index) => {
+    if (!index) {
+        list.$allMessages = list.$allMessages || []; // eslint-disable-line fp/no-mutation
+        list.$allMessages.push({ // eslint-disable-line fp/no-mutating-methods
+            message,
+            "prefix": parts.join("/")
+        });
+    }
 
-    parts.forEach((part) => {
-        innerList = innerList[part] = innerList[part] || {};
-    });
+    list.$messages = list.$messages || []; // eslint-disable-line fp/no-mutation
+    if (index === parts.length) {
+        return list.$messages.push(message); // eslint-disable-line fp/no-mutating-methods
+    }
 
-    innerList.$messages = innerList.$messages || [];
-    innerList.$messages.push(message);
+    return pushMessage(list, message, parts, index + 1);
+};
 
-    list.$allMessages = list.$allMessages || [];
-    list.$allMessages.push({
-        message,
-        prefix
-    });
+const addFlag = (flags) => (flagName) => {
+    flags[flagName] = true; // eslint-disable-line fp/no-mutation
 };
 
+const containsFlag = (flags) => (flagName) => flags[flagName];
+
 exports.processTask = (task, context, callback) => {
     const errors = {};
     const warns = {};
     const infos = {};
     const messages = {};
     const messageProcessor = (list) => (message, prefix) => {
-        pushMessage(list, message, prefix);
-        pushMessage(messages, message, prefix);
+        const parts = prefix.split("/");
+
+        pushMessage(list, message, parts, 0);
+        pushMessage(messages, message, parts, 0);
     };
+    const flags = {};
     const processor = new TaskProcessor(task, {
-        context,
+        "context": _.extend(context, {
+            "addFlag": addFlag(flags),
+            "containsFlag": containsFlag(flags)
+        }),
         "onError": messageProcessor(errors),
         "onInfo": messageProcessor(infos),
         "onWarn": messageProcessor(warns)

BuildServer/lib/tasks/cssnanoall.js

@@ -1,14 +1,15 @@
 "use strict";
 
 const glob = require("glob");
+const flagDoneName = "cssnanoallDone";
 
 module.exports = (params, processor) => ({
     "process": () => {
-        if (processor.context.cssnanoallDone) {
+        if (processor.context.containsFlag(flagDoneName)) {
             processor.onWarn("cssnanoall task is executed more than once; this is probably a bug in your mbs.json");
         }
 
-        processor.context.cssnanoallDone = true;
+        processor.context.addFlag(flagDoneName);
 
         glob("**/*.css", {
             "cwd": processor.context.exported,

BuildServer/lib/tasks/dotnetbuilderwrapper.js

@@ -1,28 +1,37 @@
 "use strict";
 
 const spawn = require("child_process").spawn;
+const streamBuffers = require("stream-buffers");
 const settings = require("../../settings");
 
+const wrapBuilder = (builder, input, onExit) => {
+    const resultBuffer = new streamBuffers.WritableStreamBuffer();
+    const errorBuffer = new streamBuffers.WritableStreamBuffer();
+
+    builder.stdout.on("data", (data) => {
+        resultBuffer.write(data);
+    });
+
+    builder.stderr.on("data", (data) => {
+        errorBuffer.write(data);
+    });
+
+    builder.on("exit", (code) => onExit(code, resultBuffer.getContentsAsString(), errorBuffer.getContentsAsString()));
+
+    builder.stdin.write(input);
+    builder.stdin.end();
+};
+
 module.exports = (params, processor) => ({
     "process": () => {
-        let result = "";
-        let error = "";
+        const input = JSON.stringify(params);
         const builder = spawn(settings.builderExecutable, [params.command]);
 
-        processor.onInfo(`DotNetBuilderWrapper processing (at ${new Date().toISOString()}): ${JSON.stringify(params, null, "    ")}`);
+        processor.onInfo(`DotNetBuilderWrapper processing (at ${new Date().toISOString()}): ${input}`);
 
-        builder.stdout.on("data", (data) => {
-            result += data;
-        });
-
-        builder.stderr.on("data", (data) => {
-            error += data;
-        });
-
-        builder.on("exit", (code) => {
+        wrapBuilder(builder, input, (code, result, error) => {
             if (code) {
-                error = `Return code is ${code}\r\n${error}`;
-                processor.onError(error);
+                processor.onError(`Return code is ${code}\r\n${error}`);
 
                 return processor.done();
             }
@@ -49,8 +58,5 @@ module.exports = (params, processor) => ({
 
             return processor.done();
         });
-
-        builder.stdin.write(JSON.stringify(params));
-        builder.stdin.end();
     }
 });

BuildServer/lib/tasks/dotnetbuildwithoutcleanup.js

@@ -2,29 +2,27 @@
 
 const sequential = require("./sequential");
 
-module.exports = (params, processor) => {
-    const tasks = [];
-
+const createTasks = function *(params) {
     if (!params.skipMbsCheckStyle) {
-        tasks.push({
+        yield {
             params,
             "type": "dotnetcheckstyle"
-        });
+        };
     }
 
-    tasks.push({
+    yield {
         params,
         "type": "dotnetrewrite"
-    });
+    };
 
     if (!params.skipNugetRestore) {
-        tasks.push({
+        yield {
             params,
             "type": "dotnetnugetrestore"
-        });
+        };
     }
 
-    tasks.push({
+    yield {
         "params": {
             "configuration": params.configuration,
             "forceCodeAnalysis": params.forceCodeAnalysis,
@@ -34,7 +32,11 @@ module.exports = (params, processor) => {
             "target": "Rebuild"
         },
         "type": "dotnetcompile"
-    });
+    };
+};
+
+module.exports = (params, processor) => {
+    const tasks = Array.from(createTasks(params));
 
     return sequential({ tasks }, processor);
 };

BuildServer/lib/tasks/dotnetcheckstyle.js

@@ -9,13 +9,15 @@ const autoGeneratedMarker
     = "//------------------------------------------------------------------------------\n"
     + "// <auto-generated>";
 
+const flagDoneName = "dotnetcheckerDone";
+
 module.exports = (params, processor) => ({
     "process": () => {
-        if (processor.context.dotnetcheckerDone) {
+        if (processor.context.containsFlag(flagDoneName)) {
             return processor.done();
         }
 
-        processor.context.dotnetcheckerDone = true;
+        processor.context.addFlag(flagDoneName);
 
         return glob("**/*.cs", { "cwd": processor.context.exported }, (globErr, files) => {
             if (globErr) {

BuildServer/lib/tasks/dotnetcompile.js

@@ -1,35 +1,37 @@
 "use strict";
 
 const path = require("path");
+const _ = require("underscore");
 const settings = require("../../settings");
 const dotnetbuilderwrapper = require("./dotnetbuilderwrapper");
 
 module.exports = (params, processor) => {
-    const compileParams = {
-        "Configuration": params.configuration,
-        "OutputDirectory": params.overrideOutputDirectory,
-        "SolutionPath": path.join(processor.context.exported, params.solution),
-        "Target": params.target,
-        "command": "compile"
-    };
-
-    if (!settings.skipCodeSigning && !params.skipCodeSigning) {
-        compileParams.SigningKey = settings.codeSigningKeyFile;
-    }
-
     if (settings.isCodeAnalysisUnsupported && params.forceCodeAnalysis) {
         processor.onError("Code analysis is not supported");
 
         return processor.done();
     }
 
-    if (
-        settings.isCodeAnalysisUnsupported
+    const getAdditionalSigningParameters = () => {
+        if (settings.skipCodeSigning || params.skipCodeSigning) {
+            return {};
+        }
+
+        return { "SigningKey": settings.codeSigningKeyFile };
+    };
+
+    const skipCodeAnalysis = settings.isCodeAnalysisUnsupported
         || params.ignoreCodeAnalysis
-        || (settings.ignoreCodeAnalysisByDefault && !params.forceCodeAnalysis)
-    ) {
-        compileParams.SkipCodeAnalysis = true;
-    }
+        || (settings.ignoreCodeAnalysisByDefault && !params.forceCodeAnalysis);
+
+    const compileParams = {
+        "Configuration": params.configuration,
+        "OutputDirectory": params.overrideOutputDirectory,
+        "SkipCodeAnalysis": skipCodeAnalysis,
+        "SolutionPath": path.join(processor.context.exported, params.solution),
+        "Target": params.target,
+        "command": "compile"
+    };
 
-    return dotnetbuilderwrapper(compileParams, processor);
+    return dotnetbuilderwrapper(_.extend(compileParams, getAdditionalSigningParameters()), processor);
 };

BuildServer/lib/tasks/dotnetnunitall.js

@@ -1,14 +1,15 @@
 "use strict";
 
 const glob = require("glob");
+const flagDoneName = "dotnetnunitallDone";
 
 module.exports = (params, processor) => ({
     "process": () => {
-        if (processor.context.dotnetnunitallDone) {
+        if (processor.context.containsFlag(flagDoneName)) {
             processor.onWarn("dotnetnunitall task is executed more than once; this is probably a bug in your mbs.json");
         }
 
-        processor.context.dotnetnunitallDone = true;
+        processor.context.addFlag(flagDoneName);
 
         glob("**/{bin,build}/**/*.{Tests,Test,UnitTests}.dll", {
             "cwd": processor.context.exported,

BuildServer/lib/tasks/dotnetrewrite.js

@@ -6,30 +6,38 @@ const async = require("async");
 const glob = require("glob");
 const settings = require("../../settings");
 
+const flagDoneName = "dotnetrewriterDone";
+
 const processAssemblyInfo = (params, processor, appendInformationalVersion) => (originalContent, cb) => {
-    let content = originalContent;
+    const processInternalsVisible = (content) => {
+        if (params.skipCodeSigning || settings.skipCodeSigning) {
+            return content;
+        }
 
-    if (!params.skipCodeSigning && !settings.skipCodeSigning) {
-        content = content.replace(
+        return content.replace(
             /InternalsVisibleTo\s*\(\s*"([\w.]+)"\s*\)/g,
             (match, p1) => `InternalsVisibleTo("${p1},PublicKey=${settings.codeSigningPublicKey}")`
         );
-    }
+    };
 
-    if (appendInformationalVersion) {
-        content = `${content}\n[assembly: System.Reflection.AssemblyInformationalVersion("${processor.context.versionInfo}")]\n`;
-    }
+    const processInformationalVersion = (content) => {
+        if (!appendInformationalVersion) {
+            return content;
+        }
+
+        return `${content}\n[assembly: System.Reflection.AssemblyInformationalVersion("${processor.context.versionInfo}")]\n`;
+    };
 
-    return cb(null, content);
+    return cb(null, processInformationalVersion(processInternalsVisible(originalContent)));
 };
 
 module.exports = (params, processor) => ({
     "process": () => {
-        if (processor.context.dotnetrewriterDone) {
+        if (processor.context.containsFlag(flagDoneName)) {
             return processor.done();
         }
 
-        processor.context.dotnetrewriterDone = true;
+        processor.context.addFlag(flagDoneName);
 
         return glob("**/{InternalsVisible,AssemblyInfo}*.cs", { "cwd": processor.context.exported }, (globErr, files) => {
             if (globErr) {

BuildServer/lib/tasks/eslintbrowserall.js

@@ -1,14 +1,15 @@
 "use strict";
 
 const glob = require("glob");
+const flagDoneName = "eslintbrowserallDone";
 
 module.exports = (params, processor) => ({
     "process": () => {
-        if (processor.context.eslintbrowserallDone) {
+        if (processor.context.containsFlag(flagDoneName)) {
             processor.onWarn("eslintbrowserall task is executed more than once; this is probably a bug in your mbs.json");
         }
 
-        processor.context.eslintbrowserallDone = true;
+        processor.context.addFlag(flagDoneName);
 
         const excludeFiles = params.excludeFiles || [];
 

BuildServer/lib/tasks/uglifyjsall.js

@@ -2,13 +2,15 @@
 
 const glob = require("glob");
 
+const doneFlagName = "uglifyjsallDone";
+
 module.exports = (params, processor) => ({
     "process": () => {
-        if (processor.context.uglifyjsallDone) {
+        if (processor.context.containsFlag(doneFlagName)) {
             processor.onWarn("dotnetnunitall task is executed more than once; this is probably a bug in your mbs.json");
         }
 
-        processor.context.uglifyjsallDone = true;
+        processor.context.addFlag(doneFlagName);
 
         glob("**/*.js", {
             "cwd": processor.context.exported,

BuildServer/package.json

@@ -3,7 +3,8 @@
   "version": "0.0.1",
   "private": true,
   "scripts": {
-    "start": "forever -c node app.js"
+    "start": "forever -c node app.js",
+    "test": "./node_modules/.bin/eslint ."
   },
   "dependencies": {
     "archiver": "^1.3.0",
@@ -37,8 +38,23 @@
     "parserOptions": {
       "ecmaVersion": 6
     },
-    "extends": "eslint:all",
+    "plugins": [
+      "fp"
+    ],
+    "extends": [
+        "eslint:all",
+        "plugin:fp/recommended"
+    ],
     "rules": {
+      "fp/no-unused-expression": "off",
+      "fp/no-nil": "off",
+      "fp/no-mutation": [
+        "error",
+        {
+          "commonjs": true
+        }
+      ],
+      "prefer-destructuring": "off",
       "quotes": [
         "warn",
         "double"
@@ -112,5 +128,9 @@
         }
       ]
     }
+  },
+  "devDependencies": {
+    "eslint": "^3.15.0",
+    "eslint-plugin-fp": "^2.3.0"
   }
 }

BuildServer/routes/manual.js

@@ -1,14 +1,15 @@
 "use strict";
 
+const _ = require("underscore");
 const builder = require("../lib/builder");
 
 exports.get = (req, res) => res.render("manual");
 
 exports.post = (req, res) => {
-    const options = req.body;
-
-    options.url = `https://pos-github.payonline.ru/${options.owner}/${options.reponame}`;
-    options.app = req.app;
+    const options = _.extend(req.body, {
+        "app": req.app,
+        "url": `https://pos-github.payonline.ru/${req.body.owner}/${req.body.reponame}`
+    });
 
     builder.build(options, (err, result) => {
         console.log("Done processing manual request");

BuildServer/routes/status.js

@@ -1,58 +1,92 @@
 "use strict";
 
 const url = require("url");
+const _ = require("underscore");
 const statusProcessor = require("../lib/status-processor");
 
 const parseOptionsFromReferer = (path, callback) => {
     const pathParts = path.split("/").filter((value) => value);
-    const result = {};
     const [, secondPart, thirdPart] = pathParts;
 
     if (!secondPart) {
-        return callback("BadRequest", result);
+        return callback("BadRequest", {});
     }
 
     if (thirdPart === "tree") {
-        [result.owner, result.reponame, , result.branchName, result.rev] = pathParts;
-    } else {
-        [result.owner, result.reponame, result.branchName, result.rev] = pathParts;
+        const [owner, reponame, , branchName, rev] = pathParts;
+
+        return callback(null, {
+            branchName,
+            owner,
+            reponame,
+            rev
+        });
     }
 
-    return callback(null, result);
+    const [owner, reponame, branchName, rev] = pathParts;
+
+    return callback(null, {
+        branchName,
+        owner,
+        reponame,
+        rev
+    });
 };
 
 const createShowReport = (res) => (err, inputOptions) => {
-    const options = inputOptions || {};
+    const options = _.extendOwn(inputOptions || {}, { err });
 
-    options.err = err;
     res.render("status", options);
 };
 
 exports.image = (req, res) => {
-    const handle = (err, options) => {
+    const getAdditionalOptions = (err, options) => {
         if (err === "ReportFileNotFound") {
-            options.status = "Building";
-        } else if (err) {
-            options.status = "StatusError";
-            options.message = err;
-        } else if (options.report.result === "MBSNotFound") {
-            options.status = "MBSNotUsed";
-        } else if (options.report.err) {
-            options.status = "Error";
-            options.message = options.report.err;
-        } else if ((options.report.result.warns.$allMessages || []).length) {
+            return { "status": "Building" };
+        }
+
+        if (err) {
+            return {
+                "message": err,
+                "status": "StatusError"
+            };
+        }
+
+        if (options.report.result === "MBSNotFound") {
+            return { "status": "MBSNotUsed" };
+        }
+
+        if (options.report.err) {
+            return {
+                "message": options.report.err,
+                "status": "Error"
+            };
+        }
+
+        if ((options.report.result.warns.$allMessages || []).length) {
             const [firstWarn] = options.report.result.warns.$allMessages;
 
-            options.status = "Warning";
-            options.message = firstWarn.message;
-        } else {
-            options.status = "OK";
-            if ((options.report.result.infos.$allMessages || []).length) {
-                options.message = options.report.result.infos.$allMessages[options.report.result.infos.$allMessages.length - 1].message;
-            }
+            return {
+                "message": firstWarn.message,
+                "status": "Warning"
+            };
+        }
+
+        const allInfos = options.report.result.infos.$allMessages || [];
+
+        if (allInfos.length) {
+            return {
+                "message": allInfos[allInfos.length - 1].message,
+                "status": "OK"
+            };
         }
+
+        return { "status": "OK" };
+    };
+
+    const handle = (err, options) => {
         res.setHeader("Content-Type", "image/svg+xml");
-        res.render("status-image", options);
+        res.render("status-image", _.extend(options, getAdditionalOptions(err, options)));
     };
 
     parseOptionsFromReferer(url.parse(req.headers.referer || "").pathname || "", (err, options) => {