#!/bin/bash
#==========================================================================
#
#   Copyright Insight Software Consortium
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#          http://www.apache.org/licenses/LICENSE-2.0.txt
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
#==========================================================================*/
if [[ $# == 0 || $1 == "--help" ]]
then
echo "                                                                        "
echo "  How to use this script   "
echo "   "
echo "   0)  Use Linux or Mac   "
echo "        - install lcov"
echo "        - use the gcc compiler"
echo "   "
echo "   1)  Add the CMake flags:   "
echo "   "
echo "       CMAKE_CXX_FLAGS:STRING=-g -O0  -fprofile-arcs -ftest-coverage   "
echo "       CMAKE_C_FLAGS:STRING= -g -O0  -fprofile-arcs -ftest-coverage   "
echo "   "
echo "   2)  Compile VTK for Debug   "
echo "   "
echo "                     CMAKE_BUILD_TYPE  Debug   "
echo "   "
echo "   3)  From the TOP of the binary directory type the "ctest" expression that "
echo "       selects the tests that you want to use to generate coverage (Ideally "
echo "       this should only need to be the unit tests of the class in question).   "
echo "   "
echo "       For example:   "
echo "   "
echo "                ctest  -R   TestPLY   -V   -N   "
echo "   "
echo "       This will print to the console the command line instructions needed to   "
echo "       run the tests (-V option), but without running the tests (-N option).   "
echo "   "
echo "   4)  From the TOP of the binary directory type the path to this script in    "
echo "       the VTK source tree. Add the relative path from your location at the TOP "
echo "       of the binary directory to the directory of the Module for which you want "
echo "       to compute code coverage, and add the selection expression that you put "
echo "       after ctest in numeral (3) above.   "
echo "   "
echo "       More specifically, for example:   "
echo "   "
echo "        computeCodeCoverageLocallyForOneTest.sh ./IO    \   "
echo "                                 -R  TestPLY   "
echo "   "
echo "   "
echo "       This will run the selected tests in VTK and generate code coverage for   "
echo "       the entire toolkit, but only from the test that you have selected. The   "
echo "       code coverage report will be generated in HTML can be opened with your   "
echo "       favorite browser. The HTML report will be placed in the IO directory. "
echo "       For example, in the case above: "
echo "    "
echo "          In Linux, you can do        firefox  ./IO/index.html     "
echo "          In Mac,   you can do        open     ./IO/index.html     "
echo "    "

else

SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

#==========================================================================
echo -n "Please wait while lcov deletes all .da files in . and subdirectories..."
lcov --quiet --directory . --zerocounters
echo "Done"
destinationdir=$1
shift
ctest $*
echo -n "Please wait while lcov captures the coverage data..."
#
# Some compilers (e.g. clang) place the .gcda files in the wrong directory
#
cd $destinationdir
lcov --quiet --directory . --capture --output-file app.info
echo "Done"
echo -n "Please wait while lcov removes coverage for some files..."
lcov --quiet --remove app.info '*Instantiator.*' 'vtkType*Array.*'  '*Tcl.cxx' '*TCLInit.cxx' '*Python.cxx' '*Wrapping*' '*Examples*' '*Testing*'  '*Utilities*' '*_s.cxx' '*_vs*.cxx' '*_fs*.cxx' '*GS.cxx' '*VS.cxx' '*FS.cxx' '*FP*.cxx' '*VP*.cxx' 'vtkgl.cxx' '/usr/*' --output-file  app.info2
echo "Done"
echo -n "Please wait while genhtml generates an HTML view from lcov coverage data files..."
genhtml --quiet app.info2 >/dev/null 2>&1
echo "Done"
echo "To view results on Linux, type firefox "$destinationdir"/index.html"
echo "To view results on Mac, type open "$destinationdir"/index.html"
fi
