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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) {
    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 arround 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;
  
  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/^=(head[1-4]|pod|item)/) {
      $incomment = 1;
    }

    if (m/^=(cut)/) {
      $incomment = 0;
      $inover = 0;
    }
    
    if (m/^=(over)/) {
      $inover = 1;
    }

    if (m/^=(back)/) {
      $inover = 0;
    }

    if ($incomment || $inover) {