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openssl/util/perl/with_fallback.pm

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Update copyright year Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7176)
2018-09-11 20:22:14 +08:00
# Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
Copyright consolidation; .pm and Configure Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-04-20 22:20:59 +08:00
#
Following the license change, modify the boilerplates in util/, tools/ Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/7766)
2018-12-06 20:03:50 +08:00
# Licensed under the Apache License 2.0 (the "License"). You may not use
Copyright consolidation; .pm and Configure Reviewed-by: Richard Levitte <levitte@openssl.org>
2016-04-20 22:20:59 +08:00
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
Refactor file writing - arrange for use of bundled Perl modules as fallback For our own convenience, we need a mechanism to be able to fall back on bundled Perl modules. It's a minimal package that's called like this: use with_fallback qw(Module1 Module2 ...); For each module, it will try to require them from the system installation, and failing that, it will temporarly add external/perl and try to require transfer::{ModuleName}. It requires that each bundled Perl modules is accompanied by a small transfer module (external/perl/transfer/ModuleName.pm in our example) that knows exactly what to load. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-22 19:37:31 +08:00
package with_fallback;
sub import {
Make 'with_fallback' use 'use' instead of 'require' This enables us to require module versions, and to fall back to a bundled version if the system version is too low. Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/6682)
2018-07-10 03:07:25 +08:00
shift;
Refactor file writing - arrange for use of bundled Perl modules as fallback For our own convenience, we need a mechanism to be able to fall back on bundled Perl modules. It's a minimal package that's called like this: use with_fallback qw(Module1 Module2 ...); For each module, it will try to require them from the system installation, and failing that, it will temporarly add external/perl and try to require transfer::{ModuleName}. It requires that each bundled Perl modules is accompanied by a small transfer module (external/perl/transfer/ModuleName.pm in our example) that knows exactly what to load. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-22 19:37:31 +08:00
use File::Basename;
use File::Spec::Functions;
foreach (@_) {
Make 'with_fallback' use 'use' instead of 'require' This enables us to require module versions, and to fall back to a bundled version if the system version is too low. Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/6682)
2018-07-10 03:07:25 +08:00
eval "use $_";
Refactor file writing - arrange for use of bundled Perl modules as fallback For our own convenience, we need a mechanism to be able to fall back on bundled Perl modules. It's a minimal package that's called like this: use with_fallback qw(Module1 Module2 ...); For each module, it will try to require them from the system installation, and failing that, it will temporarly add external/perl and try to require transfer::{ModuleName}. It requires that each bundled Perl modules is accompanied by a small transfer module (external/perl/transfer/ModuleName.pm in our example) that knows exactly what to load. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-22 19:37:31 +08:00
if ($@) {
Consolidate the locations where we have our internal perl modules Instead of having perl modules under test/testlib, util and util/perl, consolidate them all to be inside util/perl. Reviewed-by: Andy Polyakov <appro@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4069)
2017-08-02 04:10:39 +08:00
unshift @INC, catdir(dirname(__FILE__),
"..", "..", "external", "perl");
Refactor file writing - arrange for use of bundled Perl modules as fallback For our own convenience, we need a mechanism to be able to fall back on bundled Perl modules. It's a minimal package that's called like this: use with_fallback qw(Module1 Module2 ...); For each module, it will try to require them from the system installation, and failing that, it will temporarly add external/perl and try to require transfer::{ModuleName}. It requires that each bundled Perl modules is accompanied by a small transfer module (external/perl/transfer/ModuleName.pm in our example) that knows exactly what to load. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-22 19:37:31 +08:00
my $transfer = "transfer::$_";
Make 'with_fallback' use 'use' instead of 'require' This enables us to require module versions, and to fall back to a bundled version if the system version is too low. Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/6682)
2018-07-10 03:07:25 +08:00
eval "use $transfer";
Refactor file writing - arrange for use of bundled Perl modules as fallback For our own convenience, we need a mechanism to be able to fall back on bundled Perl modules. It's a minimal package that's called like this: use with_fallback qw(Module1 Module2 ...); For each module, it will try to require them from the system installation, and failing that, it will temporarly add external/perl and try to require transfer::{ModuleName}. It requires that each bundled Perl modules is accompanied by a small transfer module (external/perl/transfer/ModuleName.pm in our example) that knows exactly what to load. Reviewed-by: Rich Salz <rsalz@openssl.org>
2016-01-22 19:37:31 +08:00
shift @INC;
warn $@ if $@;
}
}
}
1;
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