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#!/usr/bin/perl
# RPM (and it's source code) is covered under two separate licenses.
# The entire code base may be distributed under the terms of the GNU
# General Public License (GPL), which appears immediately below.
# Alternatively, all of the source code in the lib subdirectory of the
# RPM source code distribution as well as any code derived from that
# code may instead be distributed under the GNU Library General Public
# License (LGPL), at the choice of the distributor. The complete text
# of the LGPL appears at the bottom of this file.
# This alternative is allowed to enable applications to be linked
# against the RPM library (commonly called librpm) without forcing
# such applications to be distributed under the GPL.
# Any questions regarding the licensing of RPM should be addressed to
# Erik Troan <ewt@redhat.com>.
# a simple script to print the proper name for perl libraries.
# To save development time I do not parse the perl grammmar but
# instead just lex it looking for what I want. I take special care to
# ignore comments and pod's.
# it would be much better if perl could tell us the proper name of a
# given script.
# The filenames to scan are either passed on the command line or if
# that is empty they are passed via stdin.
# If there are lines in the file which match the pattern
# (m/^\s*\$VERSION\s*=\s+/)
# then these are taken to be the version numbers of the modules.
# Special care is taken with a few known idioms for specifying version
# numbers of files under rcs/cvs control.
# If there are strings in the file which match the pattern
# m/^\s*\$RPM_Provides\s*=\s*["'](.*)['"]/i
# then these are treated as additional names which are provided by the
# file and are printed as well.
# I plan to rewrite this in C so that perl is not required by RPM at
# build time.
# by Ken Estes Mail.com kestes@staff.mail.com
if ("@ARGV") {
foreach (@ARGV) {
next if !/\.pm$/;
process_file($_);
}
} else {
# notice we are passed a list of filenames NOT as common in unix the
# contents of the file.
foreach (<>) {
chomp $_;
next if !/\.pm$/;
process_file($_) if -f $_;
}
}
foreach $module (sort keys %require) {
if (length($require{$module}) == 0) {
print "perl($module)\n";
} else {
# I am not using rpm3.0 so I do not want spaces arround my
# operators. Also I will need to change the processing of the
# $RPM_* variable when I upgrade.
my $v = qx{ rpm --eval '%perl_convert_version $require{$module}' };
print "perl($module) = $v\n";
}
}
exit 0;
sub process_file {
my ($file) = @_;
open(FILE, "<$file") || return;
my ($package, $version, $incomment, $inover) = ();
while (<FILE>) {
# skip the documentation
# we should not need to have item in this if statement (it
# properly belongs in the over/back section) but people do not
# read the perldoc.
if (m/^=(head1|head2|pod|item)/) {
$incomment = 1;
}
if (m/^=(cut)/) {
$incomment = 0;
$inover = 0;
}
if (m/^=(over)/) {
$inover = 1;
}
if (m/^=(back)/) {
$inover = 0;
}
if ($incomment || $inover) {
next;
}
# skip the data section
if (m/^__(DATA|END)__$/) {
last;
}
# not everyone puts the package name of the file as the first
# package name so we report all namespaces as if they were
# provided packages (really ugly).
if (m/^\s*package\s+([_:a-zA-Z0-9]+)\s*;/) {
# some internal packages, like DB, might be temporarily redefined inside a module.
if (!($package && $1 eq 'DB')) {
$package=$1;
undef $version;
$require{$package}=undef;
}
}
# after we found the package name take the first assignment to
# $VERSION as the version number. Exporter requires that the
# variable be called VERSION so we are safe.
# here are examples of VERSION lines from the perl distribution
#FindBin.pm:$VERSION = $VERSION = sprintf("%d.%02d", q$Revision$ =~ /(\d+)\.(\d+)/);
#ExtUtils/Install.pm:$VERSION = substr q$Revision$, 10;
#CGI/Apache.pm:$VERSION = (qw$Revision$)[1];
#DynaLoader.pm:$VERSION = $VERSION = "1.03"; # avoid typo warning
if (
($package) &&
(m/^\s*\$VERSION\s*=\s+/)
) {
# first see if the version string contains the string
# '$Revision' this often causes bizzare strings and is the most
# common method of non static numbering.
if (m/(\$Revision: (\d+[.0-9]+))/) {
$version= $2;
} elsif (m/[\'\"]?(\d+[.0-9]+)[\'\"]?/) {
# look for a static number hard coded in the script
$version= $1;
}
$require{$package}=$version;
}
# Each keyword can appear multiple times. Don't
# bother with datastructures to store these strings,
# if we need to print it print it now.
if ( m/^\s*\$RPM_Provides\s*=\s*["'](.*)['"]/i) {
foreach $_ (split(/\s+/, $1)) {
print "$_\n";
}
}
}
close(FILE) ||
die("$0: Could not close file: '$file' : $!\n");
return ;
}
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