add clang-tidy

This commit implements a clang-tidy file, and makes some changes to get
it to pass.  Most changes are naming or mechanical in nature.

Tested:
Clang-tidy now passes.

Signed-off-by: Ed Tanous <ed@tanous.net>
Change-Id: Ia441e4801b6c8725421d160c531c5df141f255d4
diff --git a/src/Thresholds.cpp b/src/Thresholds.cpp
index f4d4ed0..df56b21 100644
--- a/src/Thresholds.cpp
+++ b/src/Thresholds.cpp
@@ -1,11 +1,8 @@
-#include "Thresholds.hpp"
-
-#include "VariantVisitors.hpp"
-#include "sensor.hpp"
-
+#include <Thresholds.hpp>
+#include <VariantVisitors.hpp>
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/container/flat_map.hpp>
-#include <boost/lexical_cast.hpp>
+#include <sensor.hpp>
 
 #include <array>
 #include <cmath>
@@ -19,7 +16,7 @@
 #include <variant>
 #include <vector>
 
-static constexpr bool DEBUG = false;
+static constexpr bool debug = false;
 namespace thresholds
 {
 unsigned int toBusValue(const Level& level)
@@ -75,10 +72,14 @@
         {
             auto labelFind = item.second.find("Label");
             if (labelFind == item.second.end())
+            {
                 continue;
+            }
             if (std::visit(VariantToStringVisitor(), labelFind->second) !=
                 *matchLabel)
+            {
                 continue;
+            }
         }
         auto directionFind = item.second.find("Direction");
         auto severityFind = item.second.find("Severity");
@@ -323,7 +324,7 @@
         }
     }
 
-    if constexpr (DEBUG)
+    if constexpr (debug)
     {
         // Throttle debug output, so that it does not continuously spam
         ++cDebugThrottle;
@@ -491,7 +492,7 @@
                 if (auto val = readFile(attrPath, scaleFactor))
                 {
                     *val += offset;
-                    if (DEBUG)
+                    if (debug)
                     {
                         std::cout << "Threshold: " << attrPath << ": " << *val
                                   << "\n";