Fix patch versioning to count the number of commits from last major minor (#484)

Author: tony-josi-aws

CMakeLists.txt.versioning

@@ -39,8 +39,21 @@ endfunction()
 if (GIT_VERSION AND NOT ${GIT_INFO} STREQUAL "")
     message("-- Using Git to calculate AWS IoT Device Client version information...")
 
-    # Get last tag from git - this only matches tags starting with v, so we ignore non-versioning tags
-    execute_process(COMMAND ${GIT_EXECUTABLE} describe --abbrev=0 --tags --match "v[0-9]*"
+    # Get first tag with major and minor of the latest tag. 
+    execute_process(
+        COMMAND bash -c "
+            read LATEST_MAJOR_VERSION LATEST_MINOR_VERSION < <(git describe --abbrev=0 --tags | awk -F. '
+            {
+                gsub(/^v/, \"\", \$0)
+
+                split(\$0, parts, \".\")
+                LATEST_MAJOR_VERSION = parts[1]
+                LATEST_MINOR_VERSION = parts[2]
+                print LATEST_MAJOR_VERSION, LATEST_MINOR_VERSION
+
+            }')
+            git tag --sort=creatordate | grep -E \"^v?\${LATEST_MAJOR_VERSION}\.\${LATEST_MINOR_VERSION}(\\.\[0-9]+)?\" | head -n 1
+        "
         WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
         OUTPUT_VARIABLE ${PROJECT_NAME}_VERSION_STRING
         OUTPUT_STRIP_TRAILING_WHITESPACE