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Adding files to Archive::Tar

by btrott (Parson)
on Mar 17, 2001 at 01:02 UTC ( #65027=snippet: print w/replies, xml ) Need Help??
Description: This is a routine I've used in the past to add files to an Archive::Tar object (in the process of creating a tar archive). My objective was to get relative paths in the archive, rather than paths from the root.


my $tar = Archive::Tar->new; add_to_tar($tar, $thing_to_add, $base_dir); $tar->write($gz, 9);
$thing_to_add can be either a file or a directory.

$base_dir is the key to relative paths. For example, say I had a directory directory '/foo/bar', and in that directory is another directory 'baz'. I can do something like this:

add_to_tar($tar, 'baz', '/foo/bar');
Alternatively, the second directory could contain the full path:
add_to_tar($tar, '/foo/bar/baz', '/foo/bar');
Hope this is useful.
    sub add_to_tar {
        my($tar, $thing, $base) = @_;

        if (defined $base) {
            chdir $base or die "Can't chdir to $base: $!";
            $thing =~ s!^$base/?!!;

        if (-f $thing) {
        elsif (-d $thing) {
            my $code = sub {
                return if !-f $_;

                local *FH;
                open FH, $_ or die "Can't open $_: $!";
                binmode FH;
                my $c = do { local $/; <FH> };
                close FH or die "Can't close $_: $!";

                $tar->add_data($File::Find::name, $c);
            find $code, $thing;
Replies are listed 'Best First'.
Re: Adding files to Archive::Tar
by Anonymous Monk on Nov 30, 2011 at 22:16 UTC
    Hey, you made my day! Thank you so much!
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[tobyink]: *in your grep block
[tobyink]: You can use grep { $_ =~ /.*$in.*/; } @my_modules but why not stick to grep(/.*$in.*/, @my_modules)? (The latter is faster.)
[shmem]: Lady_Aleena, in the first example grep evaluates the result from grep and if true, returns $_. In the second, it always returns $_
[shmem]: ..the result from the pattern match
[Lady_Aleena]: tobyink, I did after I failed to get the BLOCK to work. I can't seem to get my brain around grep BLOCK, though I'm okay with grep EXPR.
[shmem]: so in the second example grep returns all true elements of the list passed
[Lady_Aleena]: Okay, so grep BLOCK is not like map BLOCK where something might need to be returned at the end.
[tobyink]: grep { $_ =~ /.*$in.*/; } @my_modules should work just fine. The problem is that you were adding on ;$_ at the end of the block. Why were you doing that?
[Lady_Aleena]: tobyink, I was thinking map.
[tobyink]: Something does need to be returned at the end not $_ though. You need to return (something that will be evaluated as) a boolean.

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