Shell Programming and Scripting

A,B,C,D,E,G

| (A) A | (A,B) B | (A,B,C) C | (A,B,C,D) D | (A,B,C,D,E) E | G

awk '{s=x; for(i=1; i<=NF-1; i++) {s=s (s?FS:"(") $i; $i=s ") " $i " " }}{sub(" $",x); print x,$0}' FS=, OFS='| ' file

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

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

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

awk -F, '
NF {	for(i = 1; i < NF; i++) {
		printf("| (%s", $1)
		for(j = 2; j <= i; j++)
			printf("%s%s", FS, $j)
		printf(") %s ", $i)
	}
	print "| " $NF
}' file

#!/bin/bash
:<<SPRAVKA
It works only with a single line.
it is possible with spaces.
SPRAVKA

while read -d, P; do
        T=$T$d$P
        echo -n "$t| ($T) $P"
        d=,
        t=" "
done < file
echo -n " | "
grep -o '.$' file

sed -rn 's/.$/ | &/; :1;s/^(\S*)(.),/\1 | (\1\2) \2/;t1;s/^ //p' file

awk 'RT {T = T (T?RS:"(") $1; printf "| " T ") " $1 FS; next} {print "| "$1}' RS=, file

awk 'p{printf "| (%s) %s ",s p,p; s=s p RS } {p=$1} END{print "| " p}' RS=, file