318 lines
8.9 KiB
Perl
Executable File
318 lines
8.9 KiB
Perl
Executable File
#!/usr/bin/perl
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# RPM (and its source code) is covered under two separate licenses.
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# The entire code base may be distributed under the terms of the GNU
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# General Public License (GPL), which appears immediately below.
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# Alternatively, all of the source code in the lib subdirectory of the
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# RPM source code distribution as well as any code derived from that
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# code may instead be distributed under the GNU Library General Public
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# License (LGPL), at the choice of the distributor. The complete text
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# of the LGPL appears at the bottom of this file.
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# This alternatively is allowed to enable applications to be linked
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# against the RPM library (commonly called librpm) without forcing
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# such applications to be distributed under the GPL.
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# Any questions regarding the licensing of RPM should be addressed to
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# Erik Troan <ewt@redhat.com>.
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# a simple makedepend like script for perl.
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# To save development time I do not parse the perl grammar but
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# instead just lex it looking for what I want. I take special care to
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# ignore comments and pod's.
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# It would be much better if perl could tell us the dependencies of a
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# given script.
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# The filenames to scan are either passed on the command line or if
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# that is empty they are passed via stdin.
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# If there are strings in the file which match the pattern
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# m/^\s*\$RPM_Requires\s*=\s*["'](.*)['"]/i
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# then these are treated as additional names which are required by the
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# file and are printed as well.
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# I plan to rewrite this in C so that perl is not required by RPM at
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# build time.
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# by Ken Estes Mail.com kestes@staff.mail.com
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$HAVE_VERSION = 0;
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eval { require version; $HAVE_VERSION = 1; };
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if ("@ARGV") {
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foreach (@ARGV) {
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process_file($_);
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}
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} else {
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# notice we are passed a list of filenames NOT as common in unix the
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# contents of the file.
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foreach (<>) {
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process_file($_);
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}
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}
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foreach $perlver (sort keys %perlreq) {
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print "perl >= $perlver\n";
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}
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foreach $module (sort keys %require) {
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if (length($require{$module}) == 0) {
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print "perl($module)\n";
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} else {
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# I am not using rpm3.0 so I do not want spaces around my
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# operators. Also I will need to change the processing of the
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# $RPM_* variable when I upgrade.
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print "perl($module) >= $require{$module}\n";
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}
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}
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exit 0;
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sub add_require {
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my ($module, $newver) = @_;
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my $oldver = $require{$module};
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if ($oldver) {
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$require{$module} = $newver
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if ($HAVE_VERSION && $newver && version->new($oldver) < $newver);
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}
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else {
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$require{$module} = $newver;
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}
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}
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sub process_file {
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my ($file) = @_;
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chomp $file;
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if (!open(FILE, $file)) {
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warn("$0: Warning: Could not open file '$file' for reading: $!\n");
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return;
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}
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while (<FILE>) {
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# skip the "= <<" block
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if (m/^\s*(?:my\s*)?\$(?:.*)\s*=\s*<<\s*(["'`])(.+?)\1/ ||
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m/^\s*(?:my\s*)?\$(.*)\s*=\s*<<(\w+)\s*;/) {
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$tag = $2;
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while (<FILE>) {
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chomp;
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( $_ eq $tag ) && last;
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}
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$_ = <FILE>;
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}
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# skip q{} quoted sections - just hope we don't have curly brackets
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# within the quote, nor an escaped hash mark that isn't a comment
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# marker, such as occurs right here. Draw the line somewhere.
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if ( m/^.*\Wq[qxwr]?\s*([{([#|\/])[^})\]#|\/]*$/ && ! m/^\s*(require|use)\s/ ) {
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$tag = $1;
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$tag =~ tr/{\(\[\#|\//})]#|\//;
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$tag = quotemeta($tag);
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while (<FILE>) {
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( $_ =~ m/$tag/ ) && last;
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}
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}
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# skip the documentation
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# we should not need to have item in this if statement (it
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# properly belongs in the over/back section) but people do not
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# read the perldoc.
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if (/^=(head[1-4]|pod|for|item)/) {
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/^=cut/ && next while <FILE>;
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}
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if (/^=over/) {
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/^=back/ && next while <FILE>;
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}
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# skip the data section
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if (m/^__(DATA|END)__$/) {
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last;
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}
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# Each keyword can appear multiple times. Don't
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# bother with datastructures to store these strings,
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# if we need to print it print it now.
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#
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# Again allow for "our".
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if (m/^\s*(our\s+)?\$RPM_Requires\s*=\s*["'](.*)['"]/i) {
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foreach $_ (split(/\s+/, $2)) {
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print "$_\n";
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}
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}
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my $modver_re = qr/[.0-9]+/;
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#
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# The (require|use) match further down in this subroutine will match lines
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# within a multi-line print or return statements. So, let's skip over such
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# statements whose content should not be loading modules anyway. -BEF-
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#
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if (m/print(?:\s+|\s+\S+\s+)\<\<\s*(["'`])(.+?)\1/ ||
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m/print(\s+|\s+\S+\s+)\<\<(\w+)/ ||
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m/return(\s+)\<\<(\w+)/ ) {
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my $tag = $2;
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while (<FILE>) {
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chomp;
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( $_ eq $tag ) && last;
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}
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$_ = <FILE>;
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}
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# Skip multiline print and assign statements
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if ( m/\$\S+\s*=\s*(")([^"\\]|(\\.))*$/ ||
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m/\$\S+\s*=\s*(')([^'\\]|(\\.))*$/ ||
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m/print\s+(")([^"\\]|(\\.))*$/ ||
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m/print\s+(')([^'\\]|(\\.))*$/ ) {
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my $quote = $1;
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while (<FILE>) {
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m/^([^\\$quote]|(\\.))*$quote/ && last;
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}
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$_ = <FILE>;
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}
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if (
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# ouch could be in a eval, perhaps we do not want these since we catch
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# an exception they must not be required
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# eval { require Term::ReadLine } or die $@;
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# eval "require Term::Rendezvous;" or die $@;
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# eval { require Carp } if defined $^S; # If error/warning during compilation,
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(m/^(\s*) # we hope the inclusion starts the line
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(require|use)\s+(?!\{) # do not want 'do {' loops
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# quotes around name are always legal
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['"]?([\w:\.\/]+?)['"]?[\t; ]
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# the syntax for 'use' allows version requirements
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# the latter part is for "use base qw(Foo)" and friends special case
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\s*($modver_re|(qw\s*[(\/'"]\s*|['"])[^)\/"'\$]*?\s*[)\/"'])?
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/x)
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) {
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my ($whitespace, $statement, $module, $version) = ($1, $2, $3, $4);
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# we only consider require statements that are flushed against
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# the left edge. any other require statements give too many
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# false positives, as they are usually inside of an if statement
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# as a fallback module or a rarely used option
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($whitespace ne "" && $statement eq "require") && next;
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# if there is some interpolation of variables just skip this
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# dependency, we do not want
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# do "$ENV{LOGDIR}/$rcfile";
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($module =~ m/\$/) && next;
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# skip if the phrase was "use of" -- shows up in gimp-perl, et al.
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next if $module eq 'of';
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# if the module ends in a comma we probably caught some
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# documentation of the form 'check stuff,\n do stuff, clean
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# stuff.' there are several of these in the perl distribution
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($module =~ m/[,>]$/) && next;
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# if the module name starts in a dot it is not a module name.
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# Is this necessary? Please give me an example if you turn this
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# back on.
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# ($module =~ m/^\./) && next;
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# if the module starts with /, it is an absolute path to a file
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if ($module =~ m(^/)) {
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print "$module\n";
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next;
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}
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# sometimes people do use POSIX qw(foo), or use POSIX(qw(foo)) etc.
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# we can strip qw.*$, as well as (.*$:
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$module =~ s/qw.*$//;
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$module =~ s/\(.*$//;
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# if the module ends with .pm, strip it to leave only basename.
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$module =~ s/\.pm$//;
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# some perl programmers write 'require URI/URL;' when
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# they mean 'require URI::URL;'
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$module =~ s/\//::/;
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# trim off trailing parentheses if any. Sometimes people pass
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# the module an empty list.
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$module =~ s/\(\s*\)$//;
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if ( $module =~ m/^v?([0-9._]+)$/ ) {
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# if module is a number then both require and use interpret that
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# to mean that a particular version of perl is specified
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my $ver = $1;
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if ($ver =~ /5.00/) {
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$perlreq{"0:$ver"} = 1;
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next;
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}
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else {
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$perlreq{"1:$ver"} = 1;
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next;
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}
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};
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# ph files do not use the package name inside the file.
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# perlmodlib documentation says:
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# the .ph files made by h2ph will probably end up as
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# extension modules made by h2xs.
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# so do not expend much effort on these.
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# there is no easy way to find out if a file named systeminfo.ph
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# will be included with the name sys/systeminfo.ph so only use the
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# basename of *.ph files
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($module =~ m/\.ph$/) && next;
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# use base|parent qw(Foo) dependencies
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if ($statement eq "use" && ($module eq "base" || $module eq "parent")) {
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add_require($module, undef);
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if ($version =~ /^qw\s*[(\/'"]\s*([^)\/"']+?)\s*[)\/"']/) {
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add_require($_, undef) for split(' ', $1);
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}
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elsif ($version =~ /(["'])([^"']+)\1/) {
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add_require($2, undef);
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}
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next;
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}
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$version = undef unless $version =~ /^$modver_re$/o;
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add_require($module, $version);
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}
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}
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close(FILE) ||
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die("$0: Could not close file: '$file' : $!\n");
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return;
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}
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