Function For Emmiting Project Info

WriteMetadata.cmake

@@ -0,0 +1,35 @@
+#
+# Copyright (C) 2022 Swift Navigation Inc.
+# Contact: Swift Navigation <dev@swift-nav.com>
+#
+# This source is subject to the license found in the file 'LICENSE' which must
+# be be distributed together with this source. All other rights reserved.
+#
+# THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
+# EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
+#
+
+# Writes project metadata to a json file at the build root.
+function(write_metadata)
+  if(NOT ${PROJECT_NAME} STREQUAL ${CMAKE_PROJECT_NAME})
+    return()
+  endif()
+
+  # TODO: Make sure this executes successfully
+  execute_process(
+    COMMAND git rev-parse --short HEAD
+    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+    OUTPUT_VARIABLE SHA
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
+
+  set(project_data "\"project\": \"${CMAKE_PROJECT_NAME}\"")
+  set(sha_data "\"sha\": \"${SHA}\"")
+  set(compiler_data "\"compiler\": \"${CMAKE_C_COMPILER_ID}-${CMAKE_C_COMPILER_VERSION}\"")
+
+  set(payload "{ ${project_data}, ${sha_data}, ${compiler_data} }")
+
+  file(WRITE ${CMAKE_BINARY_DIR}/project.json ${payload})
+
+endfunction()