coverage.cmake

# Taken from amazon-freertos repository
cmake_minimum_required(VERSION 3.13)
set(BINARY_DIR ${CMAKE_BINARY_DIR})

# reset coverage counters
execute_process(
  COMMAND lcov --directory ${CMAKE_BINARY_DIR}
               --base-directory ${CMAKE_BINARY_DIR}
               --zerocounters
  COMMAND mkdir -p ${CMAKE_BINARY_DIR}/coverage)

  # make the initial/baseline capture a zeroed out files
execute_process(
  COMMAND lcov --directory ${CMAKE_BINARY_DIR}
               --base-directory ${CMAKE_BINARY_DIR}
               --initial
               --capture
               --rc lcov_branch_coverage=1
               --rc genhtml_branch_coverage=1
               --output-file=${CMAKE_BINARY_DIR}/base_coverage.info
               --include "*source*")

file(GLOB files "${CMAKE_BINARY_DIR}/bin/tests/*")
set(REPORT_FILE ${CMAKE_BINARY_DIR}/utest_report.txt)
file(WRITE ${REPORT_FILE} "")

# execute all files in bin directory, gathering the output to show it in CI
foreach(testname ${files})
  get_filename_component(test ${testname} NAME_WLE)
  message("Running ${testname}")
  execute_process(COMMAND ${testname}
                  OUTPUT_FILE ${CMAKE_BINARY_DIR}/${test}_out.txt)

  file(READ ${CMAKE_BINARY_DIR}/${test}_out.txt CONTENTS)
  file(APPEND ${REPORT_FILE} "${CONTENTS}")
endforeach()

# generate Junit style xml output
execute_process(COMMAND ruby ${CMOCK_DIR}/vendor/unity/auto/parse_output.rb -xml
                        ${REPORT_FILE} WORKING_DIRECTORY ${CMAKE_BINARY_DIR})

# capture data after running the tests
execute_process(
  COMMAND lcov --capture
               --rc lcov_branch_coverage=1
               --rc genhtml_branch_coverage=1
               --base-directory ${CMAKE_BINARY_DIR}
               --directory ${CMAKE_BINARY_DIR}
               --output-file ${CMAKE_BINARY_DIR}/second_coverage.info
               --include "*source*")

# combile baseline results (zeros) with the one after running the tests
execute_process(
  COMMAND lcov --base-directory ${CMAKE_BINARY_DIR}
               --directory ${CMAKE_BINARY_DIR}
               --add-tracefile ${CMAKE_BINARY_DIR}/base_coverage.info
               --add-tracefile ${CMAKE_BINARY_DIR}/second_coverage.info
               --output-file ${CMAKE_BINARY_DIR}/coverage.info
               --no-external
               --rc lcov_branch_coverage=1)

execute_process(
  COMMAND
    genhtml --rc lcov_branch_coverage=1 --branch-coverage --output-directory
    ${CMAKE_BINARY_DIR}/coverage ${CMAKE_BINARY_DIR}/coverage.info)