bash convert rows into columns in table format - linux

Question

I'm trying to convert rows into columns in table format.
Server Name : dev1-151vd
Status : DONE
Begin time : 2021-12-20 04:30:05.458719-05:00
End time : 2021-12-20 04:33:15.549731-05:00
Server Name : dev2-152vd
Status : DONE
Begin time : 2021-12-20 04:30:05.405746-05:00
End time : 2021-12-20 04:30:45.212935-05:00
I used the following awk script to transpose rows into columns
awk -F":" -v n=4 \
'BEGIN { x=1; c=0;}
++c <= n && x == 1 {print $1; buf = buf $2 "\n";
if(c == n) {x = 2; printf buf} next;}
!/./{c=0;next}
c <=n {printf "%4s\n", $2}' temp1.txt | \
paste - - - - | \
column -t -s "$(printf "\t")"
Server Name Status Begin time End time
dev1-151vd DONE 2021-12-20 04 2021-12-20 04
dev2-152vd DONE 2021-12-20 04 2021-12-20 04
The above o/p doesn't have proper begin time & End time,Please let me know how to get the formatting right so the time is printed appropriately.

Answer 1

$ cat tst.awk
BEGIN { OFS="\t" }
NF {
if ( ++fldNr == 1 ) {
recNr++
rec = ""
}
tag = val = $0
sub(/[[:space:]]*:.*/,"",tag)
sub(/[^:]+:[[:space:]]*/,"",val)
hdr = hdr (fldNr>1 ? OFS : "") tag
rec = rec (fldNr>1 ? OFS : "") val
next
}
{
if ( recNr == 1 ) {
print hdr
}
print rec
fldNr = 0
}
END { if (fldNr) print rec }
$ awk -f tst.awk file | column -s$'\t' -t
Server Name Status Begin time End time
dev1-151vd DONE 2021-12-20 04:30:05.458719-05:00 2021-12-20 04:33:15.549731-05:00
dev2-152vd DONE 2021-12-20 04:30:05.405746-05:00 2021-12-20 04:30:45.212935-05:00
The above will work no matter how many lines per record you have in your input and whether you have other :s or %ss or anything else.

Answer 2

See this script:
awk -F": " -v n=4 \
'BEGIN { x=1; c=0;}
++c <= n && x == 1 {print $1; buf = buf $2 "\n";
if(c == n) {x = 2; printf buf} next;}
!/./{c=0;next}
c <=n {printf "%4s\n", $2}' 20211222.txt | \
paste - - - - | \
column -t -s "$(printf "\t")"
Output:
Server Name Status Begin time End time
dev1-151vd DONE 2021-12-20 04:30:05.458719-05:00 2021-12-20 04:33:15.549731-05:00
dev2-152vd DONE 2021-12-20 04:30:05.405746-05:00 2021-12-20 04:30:45.212935-05:00
Explanation:
In awk, the -F option means field-separator. In your code you used a colon to separate columns from one another. However in your input, some lines have more than 1 colon (i.e. your timestamp field alone has 3 colons) therefore awk interprets these as having 5 columns.
The solution is to add a whitespace to your field separator (": "), since your input does have a whitespace after the first colon and before your second column.