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  • [gentoo-user] Converting shell globs to regular expressions

    From Dr Rainer Woitok@21:1/5 to All on Thu Apr 13 18:30:01 2023
    Greetings,

    does anybody know about some command to convert shell globs (shell pat-
    terns) into regular expressions? Back in the old Unix days there was a
    "glob" command, but "e-files" only turns up a GNU library.

    I am aware of Python's "fnmatch.translate()" function, but this -- of
    course -- returns a Python style regular expression which I can't use together with "grep" or "gawk". So using this function would require
    moving and converting the "grep" and "gawk" specific code from my Shell
    script into a separate Python script. This would be doable, if neces-
    sary, but I would prefer staying with just my Shell script.

    Any pointers heartily welcome :-)

    Sincerely,
    Rainer

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  • From David M. Fellows@21:1/5 to All on Fri Apr 14 01:20:01 2023
    Greetings,

    does anybody know about some command to convert shell globs (shell pat- >terns) into regular expressions? Back in the old Unix days there was a >"glob" command, but "e-files" only turns up a GNU library.

    Would one of the functions in
    dev-perl/Text-Glob
    do what you need?

    DaveF


    I am aware of Python's "fnmatch.translate()" function, but this -- of >course -- returns a Python style regular expression which I can't use >together with "grep" or "gawk". So using this function would require >moving and converting the "grep" and "gawk" specific code from my Shell >script into a separate Python script. This would be doable, if neces- >sary, but I would prefer staying with just my Shell script.

    Any pointers heartily welcome :-)

    Sincerely,
    Rainer


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  • From Michael Orlitzky@21:1/5 to Dr Rainer Woitok on Fri Apr 14 01:50:01 2023
    On Thu, 2023-04-13 at 18:27 +0200, Dr Rainer Woitok wrote:
    Greetings,

    does anybody know about some command to convert shell globs (shell pat- terns) into regular expressions?


    What exactly are you trying to do? This sounds like an XY problem (https://xyproblem.info/).

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  • From Nuno Silva@21:1/5 to Dr Rainer Woitok on Sat Apr 15 16:20:01 2023
    On 2023-04-13, Dr Rainer Woitok wrote:

    Greetings,

    does anybody know about some command to convert shell globs (shell pat- terns) into regular expressions? Back in the old Unix days there was a "glob" command, but "e-files" only turns up a GNU library.

    I am aware of Python's "fnmatch.translate()" function, but this -- of course -- returns a Python style regular expression which I can't use together with "grep" or "gawk". So using this function would require moving and converting the "grep" and "gawk" specific code from my Shell script into a separate Python script. This would be doable, if neces- sary, but I would prefer staying with just my Shell script.

    Any pointers heartily welcome :-)

    What did the "glob" utility you remember do? Sources at TUHS have a
    "glob" utility, but it seems to execute a given command after expanding
    the glob, instead of outputting a translation (which I think is what
    you're describing?).

    Do you remember which system did you see this on? Perhaps this could be
    a question for alt.folklore.computers or a comp.unix.* group on USENET
    too!

    The "glob" utility at TUHS: https://minnie.tuhs.org/cgi-bin/utree.pl?file=V5/usr/source/s1/glob.c

    and the source for its online manual page from V6: https://www.tuhs.org/cgi-bin/utree.pl?file=V6%2Fusr%2Fman%2Fman8%2Fglob.8

    --
    Nuno Silva

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