bash - How to merge rows from the same column using unix tools -


i have text file looks following:

1000000    45    m    line        line  line                       breaks      breaks      has blank                       multiple rows         multiple rows -  row below.                                             how annoying!  1000001    50    f             behaved.                           column has                       text spanning                       multiple rows

i convert csv file looks like:

1000000, 45, m, line breaks multiple rows, line breaks multiple rows - how annoying! 1000001, 50, f, column has text spanning multiple rows, behaved.

the text file output comes program written in 1984, , have no way modify output. want in csv format can convert excel painlessly possible. not sure start, , rather reinvent wheel, hoping point me in right direction. thanks!

== edit ==

i've modified text file have \n between rows - maybe helpful?

== edit 2 ==

i've modified text file have blank row.

using gnu awk

gawk '     begin { fieldwidths="11 6 5 22 22" }     length($1) == 11 {         if ($1 ~ /[^[:blank:]]/) {              if (f1) print_line()             f1=$1; f2=$2; f3=$3; f4=$4; f5=$5         }         else {              f4 = f4" "$4; f5 = f5" "$5         }     }     function rtrim(str) {         sub(/[[:blank:]]+$/, "", str)         return str     }     function print_line() {         gsub(/[[:blank:]]{2,}/, " ", f4); gsub(/"/, "&&", f4)         gsub(/[[:blank:]]{2,}/, " ", f5); gsub(/"/, "&&", f5)         printf "%s,%s,%s,\"%s\",\"%s\"\n", rtrim(f1), rtrim(f2), rtrim(f3),f4,f5     }     end {if (f1) print_line()} ' file 
1000000,45,m,"this line breaks multiple rows ","this line breaks multiple rows - how annoying!" 1000001,50,f,"i column has text spanning multiple rows","i behaved. "

i've quoted last 2 columns in case contain commas, , doubled potential inner double quotes.


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