Write logs to files instead of printing them to stdout

src/utils.cc

@@ -0,0 +1,39 @@
+#include "utils.h"
+
+#include <boost/filesystem.hpp>
+
+#include "ray/ray.h"
+
+std::string::iterator split_ip_address(std::string& ip_address) {
+  if (ip_address[0] == '[') { // IPv6
+    auto split_end = std::find(ip_address.begin() + 1, ip_address.end(), ']');
+    if(split_end != ip_address.end()) {
+      split_end++;
+    }
+    if(split_end != ip_address.end() && *split_end == ':') {
+      return split_end;
+    }
+    RAY_CHECK(false, "ip address should contain a port number");
+  } else { // IPv4
+    auto split_point = std::find(ip_address.rbegin(), ip_address.rend(), ':').base();
+    RAY_CHECK_NEQ(split_point, ip_address.begin(), "ip address should contain a port number");
+    return split_point;
+  }
+}
+
+const char* get_cmd_option(char** begin, char** end, const std::string& option) {
+  char** it = std::find(begin, end, option);
+  if (it != end && ++it != end) {
+    return *it;
+  }
+  return 0;
+}
+
+void create_log_dir_or_die(const char* log_file_name) {
+  boost::filesystem::path log_file_path(log_file_name);
+  boost::system::error_code returned_error;
+  boost::filesystem::create_directories(log_file_path.parent_path(), returned_error);
+  if (returned_error) {
+    RAY_CHECK(false, "Failed to create directory for " << log_file_name);
+  }
+}