LittleJack has asked for the wisdom of the Perl Monks concerning the following question:

While grepping through the code of a Catalyst app for c->detach() calls, I found that there was a file, simply called 'detach' at the top level.

It contains log-file type entries, giving a module name and a line number plus an excerpt, and some of the lines relate to a call to the detach() method, but not all.

I've tried googling and searching through CPAN for any hint about this file, but come up blank.

TIA for any explanations monks may have. Is it a problem?

Replies are listed 'Best First'.
Re: Why is my Catalyst application creating a 'detach' file at the root level?
by roboticus (Chancellor) on Jul 22, 2021 at 13:37 UTC

    LittleJack:

    The ">" symbol tells the shell to pipe the output of the executed command (the stuff to the left) to the file named on the right.

    $ ls
_README_MCM_         count_interrupts.cpp  waitable_timer.cpp
change_interval.cpp  measure_interval.cpp

$ grep c->detach *.cpp

$ ls
_README_MCM_         count_interrupts.cpp  measure_interval.cpp
change_interval.cpp  detach                waitable_timer.cpp

    [download]

    So in this case, you'll want to either quote the string you're searching for, or escape any special symbol that the shell will treat differently.

    The bit that surprised me is that you can put the filenames to search for on the right side of the '>' symbol, I was expecting a warning or something, but as you can see above, it worked just fine and I got the 'detach' file in the directory as you indicated.

    ...roboticus

    When your only tool is a hammer, all problems look like your thumb.

[reply]
[d/l]

      How embarrassing! Thank you for explaining that. Quoting the shell special character would have solved the problem, you're right. And the behaviour is a little strange as you say.

[reply]

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