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Full Discussion: Working with strings (awk, sed, scripting, etc...)
Top Forums Shell Programming and Scripting Working with strings (awk, sed, scripting, etc...) Post 303035476 by RudiC on Saturday 25th of May 2019 02:45:07 PM
Old 05-25-2019
Well, not sure if this is the most elegant solution:

Code:
awk '
    {TMP = $NF
     for (i=NF; i>1; i--)    {sub ("," $i, _)
                              TMP = (i==2?"(":_) $0 (i==2?")":_) " " $(i-1) " | " TMP
                             }
     gsub (/([^ ],[^ ]*)+/, "(&)", TMP)
     print "| "  TMP
    }
' FS=,  file
 | (A) A | (A,B) B | (A,B,C) C | (A,B,C,D) D | (A,B,C,D,E) E | G

EDIT: or, a bit more straightforward,



Code:
awk -F, '{for (i=1; i<NF; i++) {TMP = TMP DL $i; DL = FS; printf "| (%s) %s ", TMP , $i}; print "| " $NF}' file
 | (A) A | (A,B) B | (A,B,C) C | (A,B,C,D) D | (A,B,C,D,E) E | G




EDIT: revisiting the first proposal, it can be simplified somewhat:


Code:
awk '
        {TMP = $NF
         for (i=NF; i>1; i--)   {sub ("," $i, _)
                                 TMP = "(" $0 ") " $(i-1) " | " TMP
                                }
         print "| "  TMP
        }
' FS=,  file

Last edited by RudiC; 05-26-2019 at 05:13 AM..
This User Gave Thanks to RudiC For This Post:
nezabudka
 

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LEARN ABOUT LINUX

shtool-arx

SHTOOL-ARX.TMP(1)					      GNU Portable Shell Tool						 SHTOOL-ARX.TMP(1)

NAME

       shtool-arx - GNU shtool ar(1) extensional command

SYNOPSIS

       shtool arx [-t|--trace] [-C|--command cmd] op archive file [file ...]

DESCRIPTION

       shtool arx is a wrapper around the archiving tool ar(1). It provides the ability to create archives out of existing archives, i.e., if one
       of file matches ""*.a"", the archive member files of file are used instead of file itself.

       The trick of this command is the automatic handling of archive members which is especially interesting if one wants to construct a (usually
       top-level) library archive out of pre-built sub-library archives (usually staying inside subdirs) in a large source tree. For GNU libtool
       based projects, a similar functionality is provided by GNU libtool internally, too.

OPTIONS

       The following command line options are available.

       -t, --trace
	   Shows the actually involved shell commands.

       -C, --command cmd
	   Set the used ar(1) command to cmd instead of just "ar" (searched in $PATH).

EXAMPLE

	#   Makefile
	AR=ar
	RANLIB=ranlib
	  :
	OBJS=foo.o bar.o
	LIBS=baz/libbaz.a quux/libquux.a
	  :
	libfoo.a: $(OBJS) $(LIBS)
	    shtool arx -C $(AR) rc libfoo.a $(OBJS) $(LIBS)
	    $(RANLIB) libfoo.a

HISTORY

       The GNU shtool arx command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1999 for GNU shtool. It was prompted by
       need to build libraries out of sub-libraries inside the OSSP project.

SEE ALSO

       shtool(1), ar(1).

18-Jul-2008							   shtool 2.0.8 						 SHTOOL-ARX.TMP(1)
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