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1 | #!perl -w |
2 | use strict; |
3 | |
4 | package deprecate; |
5 | use Config; |
6 | use Carp; |
7 | use warnings; |
8 | our $VERSION = 0.01; |
9 | |
10 | sub import { |
11 | my ($package, $file, $line) = caller; |
12 | my $expect_leaf = "$package.pm"; |
13 | $expect_leaf =~ s!::!/!g; |
14 | |
15 | foreach my $pair ([qw(sitearchexp archlibexp)], |
16 | [qw(sitelibexp privlibexp)]) { |
17 | my ($site, $priv) = @Config{@$pair}; |
18 | # Just in case anyone managed to configure with trailing /s |
19 | s!/*$!!g foreach $site, $priv; |
20 | |
21 | next if $site eq $priv; |
22 | if ("$priv/$expect_leaf" eq $file) { |
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23 | my $call_depth=1; |
24 | my @caller; |
25 | while (@caller = caller $call_depth++) { |
26 | last if $caller[7] # use/require |
27 | and $caller[6] eq $expect_leaf; # the package file |
28 | } |
29 | unless (@caller) { |
30 | require Carp; |
31 | Carp::cluck(<<"EOM"); |
32 | Can't find use/require $expect_leaf in caller stack |
33 | EOM |
34 | next; |
35 | } |
36 | |
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37 | # This is fragile, because it |
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38 | # is directly poking in the internals of warnings.pm |
39 | my ($call_file, $call_line, $callers_bitmask) = @caller[1,2,9]; |
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40 | |
41 | if (defined $callers_bitmask |
42 | && (vec($callers_bitmask, $warnings::Offsets{deprecated}, 1) |
43 | || vec($callers_bitmask, $warnings::Offsets{all}, 1))) { |
44 | warn <<"EOM"; |
45 | $package will be removed from the Perl core distribution in the next major release. Please install it from CPAN. It is being used at $call_file line $call_line |
46 | EOM |
47 | } |
48 | return; |
49 | } |
50 | } |
51 | } |
52 | |
53 | 1; |