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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 grammar 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) {
process_file($_);
}
} else {
# notice we are passed a list of filenames NOT as common in unix the
# contents of the file.
foreach (<>) {
process_file($_);
}
}
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 around my
# operators. Also I will need to change the processing of the
# $RPM_* variable when I upgrade.
print "perl($module) = $require{$module}\n";
}
}
exit 0;
sub process_file {
my ($file) = @_;
chomp $file;
if (!open(FILE, $file)) {
warn("$0: Warning: Could not open file '$file' for reading: $!\n");
return;
}
my ($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/^=(head[1-4]|pod|for|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 except some common
# false positives as if they were provided packages (really ugly).
if (m/^\s*package\s+([_:a-zA-Z0-9]+)\s*;/) {
$package = $1;
undef $version;
if ($package eq 'main') {
undef $package;
} else {
# If $package already exists in the $require hash, it means
# the package definition is broken up over multiple blocks.
# In that case, don't stomp a previous $VERSION we might have
# found. (See BZ#214496.)
$require{$package} = undef unless (exists $require{$package});
}
}
# 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: 1.9 $ =~ /(\d+)\.(\d+)/);
#ExtUtils/Install.pm:$VERSION = substr q$Revision: 1.9 $, 10;
#CGI/Apache.pm:$VERSION = (qw$Revision: 1.9 $)[1];
#DynaLoader.pm:$VERSION = $VERSION = "1.03"; # avoid typo warning
#General.pm:$Config::General::VERSION = 2.33;
#
# or with the new "our" pragma you could (read will) see:
#
# our $VERSION = '1.00'
if ($package && m/^\s*(our\s+)?\$(\Q$package\E::)?VERSION\s*=\s+/) {
# first see if the version string contains the string
# '$Revision' this often causes bizarre strings and is the most
# common method of non static numbering.
if (m/\$Revision: (\d+[.0-9]+)/) {
$version = $1;
} elsif (m/['"]?(\d+[.0-9]+)['"]?/) {
# look for a static number hard coded in the script
$version = $1;
}
$require{$package} = $version;
}
# Allow someone to have a variable that defines virtual packages
# The variable is called $RPM_Provides. It must be scoped with
# "our", but not "local" or "my" (just would not make sense).
#
# For instance:
#
# $RPM_Provides = "blah bleah"
#
# Will generate provides for "blah" and "bleah".
#
# 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*(our\s+)?\$RPM_Provides\s*=\s*["'](.*)['"]/i) {
foreach $_ (split(/\s+/, $2)) {
print "$_\n";
}
}
}
close(FILE) ||
die("$0: Could not close file: '$file' : $!\n");
return;
}