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Full Discussion: BASH Regex - get filename tags, labels and descriptions
Top Forums Shell Programming and Scripting BASH Regex - get filename tags, labels and descriptions Post 303024645 by Bishop on Saturday 13th of October 2018 10:07:02 PM
Old 10-13-2018
BASH Regex - get filename tags, labels and descriptions
Hi, I am trying to switch from windows to linux.
I have been using Autohotkey scripts for some little things.
I started writing some bash scripts for NEMO browser in linux mint and I am trying to convert some of AHK scripts but as I am not a programmer. I have a hard time with regex stuff.

What I did is split file path and I got it working ok. -- Directory, FileName, Filename-Without-Extension, Extension

Now every filename may or may not contain [tags], {labels} and (description) in brackets at the end of the filename.
Where I am stuck is regex that works in Autohotkey is not in BASH. I tried sed, awk, but I have no idea what I am doing.

example filename:
multiple.{1}(1)[1] dots.and spaces {labels}(description)[tag1 tag2].txt
filename with only tags [tag1 tag2 tag3].txt

Note:
Tags, labels or description can be any words or numbers, not just what I have in example.
Not every filename will have all 3. Some could have only tags, others only descriptions or labels.

need to split and get this:
shortName = "multiple.{1}(1)[1] dots.and spaces" -- filename without any tags,labels and descriptions
tags = "tag1 tag2" -- tags without brackets
labels = "label" -- labels without brackets
description = "description" -- description without brackets


Original regex from Autohotkey that works in all of my scripts

Code:
; NameNoExt is filename without extension
; get filename only without tags[], labels{} or description() 
ShortName:=RegExReplace(NameNoExt, "\s*(\([^()]+\)|{[}]+|\[[^][]+\])+$")
; Get tags
Tags:=RegExReplace(NameNoExt, ".*\[(.*)?\](?!\s).*$", "$1")
; Get labels
Label:= RegExReplace(NameNoExt, ".*\{(.*)?\}(?!\s).*$", "$1")
; Get description
Description := RegExReplace(NameNoExt, ".*\((.*)?\)(?!\s).*$", "$1")



Here is what I have in BASH .. and it is going nowere..
So to mention again, this is where I need help with regex splitting these tags, labels and descriptions.

Code:
str="multiple.{1}(1)[1] dots.and spaces {lab}(desc)[tag1 tag2].txt"

IFS='
'

NameNoExt=`echo "${str%.*}"`        # for filename with multiple dots

shortName="???"        # get "multiple.{1}(1)[1] dots"

#regexp=".*\[(.*)?\](?!\s).*$"    # from autohotkey
regexp="\[([^)]+)\]+$"
if [[ $NameNoExt =~ $regexp ]]
then 
  TAG="${BASH_REMATCH[1]}"
else 
  TAG="Nothing"
fi
#regexp=".*\{(.*)?\}(?!\s).*$"    # from autohotkey
regexp="\{([^}]+)\}+$"
if [[ $NameNoExt =~ $regexp ]]
then 
  LAB="${BASH_REMATCH[1]}"
else 
  LAB="Nothing"
fi
#regexp=".*\((.*)?\)(?!\s).*$"    # from autohotkey
regexp="\(([^)]+)\)+$"
if [[ $NameNoExt =~ $regexp ]]
then 
  DESC="${BASH_REMATCH[1]}"
else 
  DESC="Nothing"
fi
zenity --info --text "`printf "Input = \"$str\"\n\nNameNoExt = \"$NameNoExt\"\nShort Name  = \"$shortName\"\nTags  = \"$TAG\"\nLabels  = \"$LAB\"\nDescription  = \"$DESC\""`"

I highly appreciate any help with this.
Thank you all.
 

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LEARN ABOUT X11R4

libbash

LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME

     libbash -- A bash shared libraries package.

DESCRIPTION

     libbash  is  a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
     want to load and use in scripts of your own.

     It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.

     Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1).  A bash shared library that can be  loaded
     using
     ldbash(1) must answer 4 requirments:

     1.     It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).

     2.     It must contain a line that begins with '#EXPORT='.  That line will contain (after the '=') a list of functions that the library
	    exports.  I.e. all the function that will be usable after loading that library will be listed in that line.

     3.     It must contain a line that begins with '#REQUIRE='.  That line will contain (after the '=') a list of bash libraries that are
	    required for our library.  I.e. every bash library that is in use in our bash library must be listed there.

     4.     The library must be listed (For more information, see ldbashconfig(8)).

   Basic guidelines for writing library of your own:
     1.     Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.

     2.     Try to declare all variables intended for internal use as local.

     3.     Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
		  __<library_name>_
	    For example, internal function myfoosort of hashstash library should be named as
		  __hashstash_myfoosort
	    This helps to avoid conflicts in global name space when using libraries that come from different vendors.

     4.     See html manual for full version of this guide.

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <ril@ran4.net>

SEE ALSO

     ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)

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