在附加到tee的重定向中获取嵌套命令的退出状态

Question

I have this command:

coverage report | tee >(grep TOTAL | awk '{exit (int($4) >= 75)?0:1}') && (exit ${PIPESTATUS[0]})

which reports the code coverage and then prints the output to stdout and redirects that same output to a grep + awk, which basically checks whether the code coverage covers less or more than 75 . Finally, there is an exit in a subshell, which I pretend to use in my CI/CD pipeline.

The problem is that my CI/CD always completes successfully, which shouldn't happen as the code coverage is less than 75% in my tests. That means that the PIEPSTATUS isn't returning what I'm expecting it to return (awk's exit code).

Where is the problem? What am I doing wrong?

Answer 1

Exit status of

command | tee >(...)

will be the exit status of tee , regardless of what happens inside the process substitution >(...) . That's the reason your code is not working.

You can achieve your goal without having to use process substitution, like this:

coverage report | awk '{print} /TOTAL/ { pcnt=$4 } END {exit (int(pcnt) >= 75) ? 0 : 1}')

• {print} prints all the lines
• /TOTAL/ ... grabs the percentage and saves it in pcnt
• END ... exits code based on pcnt

This will not only print all the lines emitted by coverage report , it would also make sure that the exit code of pipeline reflects the coverage percentage logic.