[Perl] Gets all files in a windows directory (with GitBash) and joins them together into one. Useful for join all anonymous Notepad++ files into one.

EHW-Perl-JoinFilesInDir-03

use warnings;

use Cwd;

print "Hello World!\n\n";


#########################################################
## CREATED: 2015.10.05
## AUTHOR:  Eric Hepperle
##
## Get all files in dir and concat them together
##  with a horizontal rule including the filename,
##  followed by the file contents and 3 blank lines.
##
##  NOTE: This version concats the files but needs work
##        on how to display filename and bars.
##        Currently working on how to center the
##        filename in the bar, but Perl modulus (%)
##        operator behavior needs examination.
##
##      10/06/15 - Works. Adds namebar and contents to
##                  screen. Next is to get it to write
##                  out to a file.    
##
##      10/07/15 - Works and writes to joinfile! :).
##
#########################################################

my $nppPath = '/c/Users/Eric/AppData/Roaming/Notepad++/backup';
my @dirContents = `ls $nppPath | grep 'new '`;


# chdir($nppPath);

# confirm chdir:
# print "\tCurrent working directory after change is: \n" . `pwd`;

print "\$dirContents:\n\n";
# $bar = '-'x45,"\n";

my $out = joinFileContents(@dirContents);
print $out;

# write joined file contents to joinfile
my $outfileName = 'eh_masterjoined_01.txt';
open FH, '>', $outfileName or die "Can't open file $!";
print FH $out;


###################################
# SUBROUTINES:
###################################

sub joinFileContents {

    my (@dirContents) = @_;
    
	my $rootPath = `pwd`;
	print "\$rootPath = $rootPath\n";
    
    my $outStr = '';
	
    foreach my $filename (@dirContents) {
    
        # Remove newline from $filename.
        chomp($filename);
        $fullPath = $nppPath . '/' . $filename;
		# print "FILENAME TO OPEN: $filename\n";
		open my $FH, '<', $fullPath or die "Can't open file {$fullPath}[$!]";
		# print "Successfully opened:\t$filename\n";
        
        # verify contents:
        my $fileContents = do { local $/; <$FH> };
        # print "\n\n$bar\n\n";
        # print "File Contents:\n\n$fileContents\n";
        
        # print bar and contents
        $outStr .= nameBar($filename) . "\n\n" . $fileContents . "\n\n";
        
	}
=begin comment    
     print nameBar("Eric's Name Bar", 69);
     print nameBar("Apples", 48);
     print nameBar("Incredible Hulk");
=cut    
    return $outStr;
}

sub nameBar {
    
    my ($name, $barlen) = @_;
    
    
    # default bar length.
    my $barLen = $barlen ? $barlen : 60;
    my $nameLen = length($name);
    my $topBar = '#'x$barLen;
    my $bottomBar = '#'x$barLen;
    
=begin comment    
    print "\$name = $name\n\n";
    print "\$topBar = $topBar\n";
    print "\$barLen = $barLen\n";
    print "\$nameLen = $nameLen\n";
    print "\$bottomBar = $bottomBar\n";
=cut   
    my $nameStartPoint = int($barLen / 2) - int($nameLen / 2);
    my $barCharsFront = $nameStartPoint - 1;
    my $barCharsRear = $barLen - ($barCharsFront + $nameLen);
    my $midBar = '##' . ' 'x ($barCharsFront - 2) . $name . ' 'x ($barCharsRear - 2) . '##';

=begin comment    
    print "NAME WILL START AT CHARACTER [$nameStartPoint] of the bar\n\n";
    print "\$barCharsFront = $barCharsFront\n\n";
    print "\$midBar =\n$midBar\n" . length($midBar) . "\n\n";
=cut    
    # my $fullBar = "\t$topBar\n\t$midBar\n\t$bottomBar\n\n";
    my $fullBar = "\t$topBar\n\t$midBar\n\t$bottomBar\n\n";
    return $fullBar;

}