App::DocKnot::Util

(Shared utility functions for other DocKnot modules)

SYNOPSIS

    use App::DocKnot::Util qw(
        is_newer latest_tarball print_checked print_fh
    );
    use Path::Tiny qw(path);

    print_checked('some stdout output');
    my @inputs = (path('/input-1'), path('/input-2'));
    if (!is_newer(path('/output'), @inputs)) {
        open(my $fh, '>', '/output');
        print_fh($fh, '/output', 'some stuff');
        close($fh);
    }

    my $latest_ref = latest_tarball(path('/archive'), 'App-Foo');

REQUIREMENTS

Perl 5.24 or later and the modules List::SomeUtils, Path::Tiny, and Sort::Versions, available from CPAN.

DESCRIPTION

This module collects utility functions used by other App::DocKnot modules. It is not really intended for use outside of DocKnot, but these functions can be used if desired.

FUNCTIONS

is_newer(FILE, SOURCE[, SOURCE ...])

Returns a true value if FILE exists and has a last modified time that is newer or equal to the last modified times of all SOURCE files, and otherwise returns a false value. Used primarily to determine if a given output file is up-to-date with respect to its source files. All paths must be Path::Tiny objects.

latest_tarball(PATH, NAME)

Returns data including a file list for the latest tarballs (by version number) for a given software package NAME in the directory PATH (which must be a Path::Tiny object). Versions are compared using Sort::Versions. The return valid is a hash with the following keys:

files: The list of files found for that version.
version: The version number extracted from this set of files.

print_checked(ARG[, ARG ...])

The same as print (without a file handle argument), except that it throws a text exception on failure as if autodie affected print (which it unfortunately doesn't because print cannot be prototyped).

print_fh(FH, NAME, DATA[, DATA ...])

Writes the concatenation of the DATA elements (interpreted as scalar strings) to the file handle FH. NAME should be the name of (or Path::Tiny object for) the file open as FH, and is used for error reporting.

This is mostly equivalent to print {fh} but throws a text exception in the event of a failure.

AUTHOR

Russ Allbery <rra@cpan.org>

COPYRIGHT AND LICENSE

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.