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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 alternatively 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 makedepends like script for perl.
+
+# 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 dependencies 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 strings in the file which match the pattern
+# m/^\s*\$RPM_Requires\s*=\s*["'](.*)['"]/i
+# then these are treated as additional names which are required 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 (<>) {
+ chomp $_;
+ process_file($_) 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
+ # $RPM_* vairable when I upgrage.
+
+ print "perl($module) >= $require{$module}\n";
+ }
+}
+
+exit 0;
+
+
+
+sub process_file {
+
+ my ($file) = @_;
+
+ open(FILE, "<$file") || return;
+
+ while (<FILE>) {
+
+ # skip the "= <<" block
+
+ if ( ( m/^\s*\$(.*)\s*=\s*<<\s*["'](.*)['"]/i) ||
+ ( m/^\s*\$(.*)\s*=\s*<<\s*(.*);/i) ) {
+ $tag = $2;
+ while (<FILE>) {
+ ( $_ =~ /^$tag/) && last;
+ }
+ }
+
+ # 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)/) .. (m/^=(cut)/) ) {
+ next;
+ }
+
+ if ( (m/^=(over)/) .. (m/^=(back)/) ) {
+ next;
+ }
+
+ # skip the data section
+ if (m/^__(DATA|END)__$/) {
+ last;
+ }
+
+ # 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_Requires\s*=\s*["'](.*)['"]/i) {
+ foreach $_ (split(/\s+/, $1)) {
+ print "$_\n";
+ }
+ }
+
+ if (
+
+# ouch could be in a eval, perhaps we do not want these since we catch
+# an exception they must not be required
+
+# eval { require Term::ReadLine } or die $@;
+# eval "require Term::Rendezvous;" or die $@;
+# eval { require Carp } if defined $^S; # If error/warning during compilation,
+
+
+ (m/^(\s*) # we hope the inclusion starts the line
+ (require|use)\s+(?!\{) # do not want 'do {' loops
+ # quotes around name are always legal
+ [\'\"]?([^\;\ \'\"\t]*)[\'\"]?[\t\;\ ]
+ # the syntax for 'use' allows version requirements
+ \s*([.0-9]*)
+ /x)
+ ) {
+ my ($whitespace, $statement, $module, $version) = ($1, $2, $3,$4);
+
+ # we only consider require statements that are flush against
+ # the left edge. any other require statements give too many
+ # false positives, as they are usually inside of an if statement
+ # as a fallback module or a rarely used option
+
+ ($whitespace ne "" && $statement eq "require") && next;
+
+ # if there is some interpolation of variables just skip this
+ # dependency, we do not want
+ # do "$ENV{LOGDIR}/$rcfile";
+
+ ($module =~ m/\$/) && next;
+
+ # skip if the phrase was "use of" -- shows up in gimp-perl, et al
+ next if $module eq 'of';
+
+ # if the module ends in a comma we probaly caught some
+ # documentation of the form 'check stuff,\n do stuff, clean
+ # stuff.' there are several of these in the perl distribution
+
+ ($module =~ m/[,>]$/) && next;
+
+ # if the module name starts in a dot it is not a module name.
+ # Is this necessary? Please give me an example if you turn this
+ # back on.
+
+ # ($module =~ m/^\./) && next;
+
+ # if the module ends with .pm strip it to leave only basename.
+ # starts with /, which means its an absolute path to a file
+ if ($module =~ m(^/)) {
+ print "$module\n";
+ next;
+ }
+
+ # sometimes people do use POSIX qw(foo), or use POSIX(qw(foo)) etc
+ # we can strip qw.*$, as well as (.*$:
+ $module =~ s/qw.*$//;
+ $module =~ s/\(.*$//;
+
+ $module =~ s/\.pm$//;
+
+ # some perl programmers write 'require URI/URL;' when
+ # they mean 'require URI::URL;'
+
+ $module =~ s/\//::/;
+
+ # trim off trailing parenthesis if any. Sometimes people pass
+ # the module an empty list.
+
+ $module =~ s/\(\s*\)$//;
+
+ if ( $module =~ m/^[0-9._]+$/ ) {
+ # if module is a number then both require and use interpret that
+ # to mean that a particular version of perl is specified
+
+ if ($module =~ /5.00/) {
+ print "perl >= 0:$module\n";
+ next;
+ }
+ else {
+ print "perl >= 1:$module\n";
+ next;
+ }
+
+ };
+
+ # ph files do not use the package name inside the file.
+ # perlmodlib documentation says:
+
+ # the .ph files made by h2ph will probably end up as
+ # extension modules made by h2xs.
+
+ # so do not expend much effort on these.
+
+
+ # there is no easy way to find out if a file named systeminfo.ph
+ # will be included with the name sys/systeminfo.ph so only use the
+ # basename of *.ph files
+
+ ($module =~ m/\.ph$/) && next;
+
+ $require{$module}=$version;
+ $line{$module}=$_;
+ }
+
+ }
+
+ close(FILE) ||
+ die("$0: Could not close file: '$file' : $!\n");
+
+ return ;
+}