add getBuildEnv function to extract server arch and os

Author: lrlna

README.md

@@ -53,6 +53,12 @@ Returns an object:
 __isGenuine__: boolean. 
 __serverName__: name of the server (mongoDB, cosmosDB, or documentDB).
 
+### getBuildEnv(buildInfo)
+Returns an object:
+
+__serverOs__: build's OS version (macOS, linux, windows etc.).
+__serverArch__: build's architecture (e.g. x86_64).
+
 # Installation
 ```
 npm install -S mongodb-build-info

index.js

@@ -35,6 +35,15 @@ function isLocalhost(uri) {
   return !!uri.match(LOCALHOST_REGEX);
 }
 
+function getBuildEnv(buildInfo) {
+  const serverOs = buildInfo.buildEnvironment ?
+    buildInfo.buildEnvironment.target_os : null;
+  const serverArch = buildInfo.buildEnvironment ?
+    buildInfo.buildEnvironment.target_arch : null;
+
+  return { serverOs, serverArch };
+}
+
 function getGenuineMongoDB(buildInfo, cmdLineOpts) {
   const res = {
     isGenuine: true,
@@ -59,4 +68,4 @@ function getGenuineMongoDB(buildInfo, cmdLineOpts) {
   return res;
 }
 
-module.exports = { getDataLake, isEnterprise, isAtlas, isLocalhost, getGenuineMongoDB };
+module.exports = { getDataLake, isEnterprise, isAtlas, isLocalhost, getGenuineMongoDB, getBuildEnv };

test/index.spec.js

@@ -3,6 +3,7 @@ const fixtures = require('./fixtures');
 const isAtlas = require('../.').isAtlas;
 const getDataLake = require('../.').getDataLake;
 const isLocalhost = require('../.').isLocalhost;
+const getBuildEnv = require('../.').getBuildEnv;
 const isEnterprise = require('../.').isEnterprise;
 const getGenuineMongoDB = require('../.').getGenuineMongoDB;
 
@@ -37,6 +38,14 @@ describe('mongodb-build-info', () => {
     });
   });
 
+  context('getBuildEnv', () => {
+    it('returns server os and server arch', () => {
+      const buildEnv = getBuildEnv(fixtures.BUILD_INFO_3_2);
+      expect(buildEnv.serverOs).to.equal('osx');
+      expect(buildEnv.serverArch).to.equal('x86_64');
+    });
+  });
+
   context('isAtlas', () => {
     it('reports on atlas', () => {
       expect(isAtlas('mongodb+srv://admin:[email protected]/admin')).to.be.true;