BASH Regex

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Top Forums Shell Programming and Scripting BASH Regex - get filename tags, labels and descriptions Post 303024953 by Bishop on Sunday 21st of October 2018 12:59:27 AM

10-21-2018

Registered User

Ok, I think I got this thing working now.
I did not know how to extract content A,B,C from "only" end brackets so I had to create new VAR from the tail brackets (if existed) and then extract contents of A,B and C from that. Otherwise regex would be getting 1,2,3 from brackets in the filename.

Anyway... it is ok as it is now but if there is a better solution I would love to learn it.
note: this is for string testing only, once it is in a real script I would have checking to see if file or directory before getting shortName and extension.

Code:

#!/bin/bash
test_str=(
    'test1.{1}(2)[3] dots.spaces {A1}(B1)[C1].ext'
    'test2.[3]{1}(2) dots.spaces [C1](B1){A1}.ext'
    'test3 [3].com [C1].ext'
    'test4 {1}(2)[3]dots.ext'
    'test4 {1} (2) [3] dots.ext'
    'test6 (B1)[C1].ext'
    'test7[C1](B1).ext'
)
IFS='
'
regexp='\s*(\([^)]+\)|\{[^}]+\}|\[[^][]+\])+$'
subst=""
regexTag='.*\[([^]]+)\]'
regexLab='.*\{([^}]+)\}'
regexDes='.*\(([^)]+)\)'


for p in "${test_str[@]}"
do
    NameNoExt=`echo "${p%.*}"`
    if [[ $NameNoExt =~ $regexp ]]; then
        tailBrackets="${BASH_REMATCH[0]}";
        shortName=$(echo "$NameNoExt" | sed -r 's/'$regexp'/'$subst'/g');
    else
        shortName="$NameNoExt"
        tailBrackets=""
    fi
    # if tail bracket exist then extract A,B,C
    if [ $tailBrackets ]; then
        if [[ $tailBrackets =~ $regexTag ]]
        then 
          TAG="${BASH_REMATCH[1]}"
        else 
          TAG=""
        fi
        if [[ $tailBrackets =~ $regexLab ]]
        then 
          LAB="${BASH_REMATCH[1]}"
        else 
          LAB=""
        fi
        if [[ $tailBrackets =~ $regexDes ]]
        then 
          DES="${BASH_REMATCH[1]}"
        else 
          DES=""
        fi
    else
        TAG=""
        LAB=""
        DES=""
    fi
    zenity --info --text "`printf "Filename = \"$p\"\n\nNameNoExt = \"$NameNoExt\"\nShort Name  = \"$shortName\"\nTail Brackets = \"$tailBrackets\"\nA  = \"$LAB\"\nB  = \"$DES\"\nC  = \"$TAG\""`"
done

Bishop

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zzip_open_ext_io

ZZIP_OPEN(3)						       zziplib Function List						      ZZIP_OPEN(3)

NAME

       zzip_open, zzip_open_ext_io, zzip_open_shared_io - ...

SYNOPSIS

       #include <zzip/lib.h>

       ZZIP_FILE * zzip_open((zzip_char_t * filename, int o_flags));

       ZZIP_FILE * zzip_open_ext_io((zzip_char_t * filename,		    int o_flags, int o_modes,		     zzip_strings_t * ext,
				    zzip_plugin_io_t io));

       ZZIP_FILE * zzip_open_shared_io((ZZIP_FILE * stream,	     zzip_char_t * filename, int o_flags,
				       int o_modes, zzip_strings_t * ext,	   zzip_plugin_io_t io));

DESCRIPTION

       The zzip_open_ext_io function uses explicit ext and io instead of the internal defaults, setting them to zero is equivalent to zzip_open

       note that the two flag types have been split into an o_flags (for fcntl-like openflags) and o_modes where the latter shall carry the
       zzip_flags and possibly accessmodes for unix filesystems. Since this version of zziplib can not write zipfiles, it is not yet used for
       anything else than zzip-specific modeflags.

       The zzip_open_ext_io function returns a new zzip-handle (use zzip_close to return it). On error the zzip_open_ext_io function will return
       null setting errno(3).

       The zzip_open_shared_io function takes an extra stream argument - if a handle has been then ext/io can be left null and the new stream
       handle will pick up the ext/io. This should be used only in specific environment however since zzip_file_real does not store any
       ext-sequence.

       The benefit for the zzip_open_shared_io function comes in when the old file handle was openened from a file within a zip archive. When the
       new file is in the same zip archive then the internal zzip_dir structures will be shared. It is even quicker, as no check needs to be done
       anymore trying to guess the zip archive place in the filesystem, here we just check whether the zip archive's filepath is a prefix part of
       the filename to be opened.

       Note that the zzip_open_shared_io function is also used by zzip_freopen that will unshare the old handle, thereby possibly closing the
       handle.

       The zzip_open_shared_io function returns a new zzip-handle (use zzip_close to return it). On error the zzip_open_shared_io function will
       return null setting errno(3).

AUTHOR

       o   Guido Draheim <guidod@gmx.de> Tomi Ollila <Tomi.Ollila@iki.fi>

COPYRIGHT

       Copyright (c) 1999,2000,2001,2002,2003 Guido Draheim All rights reserved, use under the restrictions of the Lesser GNU General Public
       License or alternatively the restrictions of the Mozilla Public License 1.1

zziplib 							      0.13.56							      ZZIP_OPEN(3)

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