Add alpine support with fix and --source option

Author: AdityaHirapara

src/main/java/com/browserstack/local/Local.java

@@ -22,6 +22,8 @@ public class Local {
 
     private LocalProcess proc = null;
 
+    // Current version of binding package, used for --source option of binary
+    private final String packageVersion = "1.0.5";
     private final Map<String, String> parameters;
     private final Map<String, String> avoidValueParameters;
 
@@ -138,6 +140,8 @@ private void makeCommand(Map<String, String> options, String opCode) {
         command.add(opCode);
         command.add("--key");
         command.add(options.get("key"));
+        command.add("--source");
+        command.add("java-" + packageVersion);
 
         for (Map.Entry<String, String> opt : options.entrySet()) {
             String parameter = opt.getKey().trim();
@@ -176,8 +180,14 @@ private boolean isProcessRunning(int pid) throws Exception {
         }
         else {
             //ps exit code 0 if process exists, 1 if it doesn't
+            cmd.add("/bin/sh");
+            cmd.add("-c");
             cmd.add("ps");
-            cmd.add("-p");
+            cmd.add("-o");
+            cmd.add("pid=");
+            cmd.add("|");
+            cmd.add("grep");
+            cmd.add("-w");
             cmd.add(String.valueOf(pid));
         }
 

src/main/java/com/browserstack/local/LocalBinary.java

@@ -10,7 +10,7 @@
 
 class LocalBinary {
 
-    private static final String BIN_URL = "https://s3.amazonaws.com/browserStack/browserstack-local/";
+    private static final String BIN_URL = "https://bstack-local-prod.s3.amazonaws.com/";
 
     private String httpPath;
 
@@ -40,15 +40,33 @@ private void initialize() throws LocalException {
         } else if (osname.contains("mac") || osname.contains("darwin")) {
             binFileName = "BrowserStackLocal-darwin-x64";
         } else if (osname.contains("linux")) {
-            String arch = System.getProperty("os.arch");
-            binFileName = "BrowserStackLocal-linux-" + (arch.contains("64") ? "x64" : "ia32");
+            if (isAlpine()) {
+                binFileName = "BrowserStackLocal-alpine";
+            } else {
+                String arch = System.getProperty("os.arch");
+                binFileName = "BrowserStackLocal-linux-" + (arch.contains("64") ? "x64" : "ia32");
+            }
         } else {
             throw new LocalException("Failed to detect OS type");
         }
 
         httpPath = BIN_URL + binFileName;
     }
 
+    private boolean isAlpine() {
+        String[] cmd = { "/bin/sh", "-c", "grep -w \"NAME\" /etc/os-release" };
+        boolean flag = false;
+
+        try {
+            Process os = Runtime.getRuntime().exec(cmd);
+            BufferedReader stdout = new BufferedReader(new InputStreamReader(os.getInputStream()));
+
+            flag = stdout.readLine().contains("Alpine");
+        } finally {
+            return flag;
+        }
+    }
+
     private void checkBinary() throws LocalException{
         boolean binaryWorking = validateBinary();