#!/usr/bin/perl

 

use strict;
my $i=0;
my $return="\n";
 

( @ARGV == 1 and -d $ARGV[0] ) or die "Usage: $0 dir_name > out.csv\n";

 

my $dirname = shift;

opendir( DIR, $dirname ) or die "$dirname: $!";

 

my ( $firstfile, @files ) = grep /.+\.txt$/, readdir DIR;

 

open( F, $firstfile ) or die "$firstfile: $!";

my ( @names, @values );

my ( $basename ) = ( $firstfile =~ /(.+)\.txt$/ );

my $date = <F>;

while (<F>) {

    chomp;
    while ($i++<14)
    {
    my ( $n, $v ) = split /,/, $_, 2;

    push @names, $n;

    push @values, $v;
    }
    continue 
    push @names, $return;
    
    my ( $n, $v ) = split /,/, $_, 2;

    push @names, $n;

    push @values, $v;
}

close F;

print join( ",", "sourcefile", "date", @names ), "\n";

print join( ",", $basename, $date, @values ), "\n";

 

for my $file ( @files ) {

    ( $basename ) = ( $file =~ /(.+)\.txt$/ );

    if ( open( F, $file )) {

        ( $date, @values ) = <F>;

        chomp $date;

        chomp @values;

        s/.+?,// for ( @values );      # delete the "name," parts

        print join( ",",  @values ), "\n";

        close F;

    }

    else {

        warn "$file: $!\n";

    }

}