Detect Alpine linux and download specific binary

Author: AdityaHirapara

lib/LocalBinary.js

@@ -3,6 +3,7 @@ var https = require('https'),
   fs = require('fs'),
   path = require('path'),
   os = require('os'),
+  childProcess = require('child_process'),
   HttpsProxyAgent = require('https-proxy-agent'),
   LocalError = require('./LocalError');
 
@@ -16,12 +17,29 @@ function LocalBinary(){
     this.windows = true;
     this.httpPath = 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal.exe';
   } else {
-    if(this.is64bits)
-      this.httpPath = 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-linux-x64';
-    else
-      this.httpPath = 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-linux-ia32';
+    if(this.isAlpine()) {
+      this.httpPath = 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-alpine';
+    } else {
+      if(this.is64bits)
+        this.httpPath = 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-linux-x64';
+      else
+        this.httpPath = 'https://s3.amazonaws.com/bstack-local-prod/BrowserStackLocal-linux-ia32';
+    }
   }
 
+  this.isAlpine = function() {
+    try {
+      const stdout = childProcess.execSync('grep -w "NAME" /etc/os-release');
+      if (/Alpine/.test(stdout)) {
+        return true;
+      } else {
+        return false;
+      }
+    } catch(e) {
+      return false;
+    }
+  };
+
   this.retryBinaryDownload = function(conf, destParentDir, callback, retries, binaryPath) {
     var that = this;
     if(retries > 0) {