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Cumulating lcov outputs for different absolute directories

I'm using code coverage on different test suites and those suites are launched under different directories. Say my suite1 is launched in directory /path1/mysoft/src and my suite2 is launched in directory /path2/mysoft/src/

I launch lcov in /path1/mysoft (respectively with path2) using lcov -d . -c -o suite1.info (resp. with suite2).

Then I want to cumulate the coverage from both test suites. I copy the suite1.info and suite2.info files in another directory /path3/mysoft which also contains the source code from my program.

I can cumulate both with lcov -a suite1.info -a suite2.info -o tests.info however the coverage for a given file src/example.c won't be cumulated as lcov will condider that /path1/mysoft/src/example.c and /path2/mysoft/src/example.c are two different files. Therefore cumulating won't work.

How can I cumulate code coverage for the same source code coming from different base directories?

Some unsatistfying solutions

  • Removing the base directories by launching lcov -d . -c --rc geninfo_adjust_src_path=/path1 -o suite1.info. In this case the coverage will be cumulated correctly by lcov, however genhtml will fail because it won't find the source code at the correct place. At this time I don't know what path3 will be, so I can't replace path1 by path3.
  • Renaming the base directories when cumulating lcov outputs by using the same geninfo_adjust_src_path option. I've been unable to do so: launching lcov -a suite1.info -a suite2.info --rc geninfo_adjust_src_path='path1 => path3' --rc geninfo_adjust_src_path='path1 => path2' -o tests.info didn't change anything.
  • Launching everying in the same base directory (see below)

Some context

Why am I launching my test suites in different base directories? Well actually the continuous integration is doing that. So path1 is something like /home/gitlab/builds/b8e873c2/0/. The test suites are each launched in a different job and cumulating the coverage is also done in another job. Each job is launched in a different base directory and the .info files are retrieved using artifacts.

Thanks for any help!

Solution

  • There is an answer, that may not be the most elegant. As source filenames are stored in plain text, they can be changed pretty easily using sed for instance.

    Therefore all the commands launched could look like this (remind that each is actually launched by a different job):

    lcov -d . -c --rc geninfo_adjust_src_path=/path1 -o suite1.info # in /path1/mysoft lcov -d . -c --rc geninfo_adjust_src_path=/path2 -o suite2.info # in /path2/mysoft # From /path3/mysoft, after retrieving suite1.info and suite2.info lcov -a suite1.info -a suite2.info | sed 's/^SF:/mysoft/SF:/path3/mysoft' > tests.info

    The two firt lines remove any reference to /path1 or /path2 from the .info files. The third line adds a reference to /path3 in front of the path to the source files so that the genhtml can find them.