Cannot open source file

[lc-soft]

travis-ci log: https://travis-ci.org/lc-soft/LCUI/jobs/644692385

Related code:

cpp-coveralls/cpp_coveralls/coverage.py

Lines 430 to 445 in ff7af7e

	if not os.path.isabs(source_file_path):
	if args.build_root:
	source_file_path = os.path.join(
	args.build_root, source_file_path)
	elif root_is_libtool_dir:
	source_file_path = os.path.abspath(
	libtool_source_file_path(
	root, source_file_path))
	else:
	if not source_file_path.startswith(os.path.pardir + os.path.sep) and \
	os.path.dirname(source_file_path):
	the_root = abs_root
	else:
	the_root = root
	source_file_path = os.path.abspath(
	os.path.join(the_root, source_file_path))

The value of source_file_path should be "/home/travis/build/lc-soft/LCUI/src/gui/widget/canvas.c", not "/home/travis/build/lc-soft/LCUI/widget/canvas.c".

The gcov file content looks like this:

$ cat src/gui/widget/canvas.gcno\#\#widget\#canvas.c.gcov 
        -:    0:Source:widget/canvas.c
        -:    0:Graph:/home/lc/projects/LCUI/src/gui/widget/.libs/canvas.gcno
        -:    0:Data:/home/lc/projects/LCUI/src/gui/widget/.libs/canvas.gcda
...

The path of the source file recorded in the gcov file is relative to the Makefile, maybe you need to modify the file path generation rules, like this pseudo code:

- source_file_path = os.path.join(current_dir_path, source_file_path)
+ source_file_path = os.path.join(makefile_dir_path, source_file_path) 

I tried using the gcov command manually, The file list now looks like this:

./Makefile
./src/Makefile
./src/thread/Makefile
./src/thread/pthread/thread.c
./src/thread/pthread/.libs/thread.gcda
./src/thread/pthread/.libs/thread.gcno

Using the following command will successfully create the ./src/thread/pthread.c.gcov file,

$ cd src/thread/
$ gcov -o ./pthread/.libs pthread/thread.c
File 'pthread/thread.c'
Lines executed:80.00% of 50
Creating 'thread.c.gcov'