1 #!/usr/bin/perl -w
   2 #
   3 # Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   4 # Use is subject to license terms.
   5 #
   6 # CDDL HEADER START
   7 #
   8 # The contents of this file are subject to the terms of the
   9 # Common Development and Distribution License (the "License").
  10 # You may not use this file except in compliance with the License.
  11 #
  12 # You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  13 # or http://www.opensolaris.org/os/licensing.
  14 # See the License for the specific language governing permissions
  15 # and limitations under the License.
  16 #
  17 # When distributing Covered Code, include this CDDL HEADER in each
  18 # file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  19 # If applicable, add the following below this CDDL HEADER, with the
  20 # fields enclosed by brackets "[]" replaced with your own identifying
  21 # information: Portions Copyright [yyyy] [name of copyright owner]
  22 #
  23 # CDDL HEADER END
  24 #
  25 #
  26 # Generate a revision number for the sgs linker components, based
  27 # on usr/src/cmd/sgs/tools/SUNWonld-README.
  28 #
  29 #       usage: readme_revision [-d] [readme-file]
  30 #
  31 # This revision number used to be the SCCS revision id for that file,
  32 # in the form 1.xxx (where xxx was the revision). There were two benefits:
  33 #
  34 #       (1) You could examine the sccs revision log to determine the CR
  35 #               of the putback that created the revision.
  36 #       (2) The revisions were monotonically increasing.
  37 #
  38 # In order to remove the hard wired dependence on sccs, this script generates
  39 # a replacement revision number, by returning the string '1.xxx', where
  40 # xxx is an integer giving the number of unique CR lines found in the file.
  41 # This means that the revision goes up by one for each CR we fix, which
  42 # makes intutive sense, and is similar to the way the SCCS revision worked.
  43 #
  44 # If this is a debug/development build (-d option), then we include
  45 # additional information at the end of the revision:
  46 #
  47 #       - Workspace name
  48 #       - user
  49 #       - CR # of last item in the readme file
  50 #       - date,
  51 #
  52 # This extra information is useful when we need to identify SUNWonld
  53 # linker packages in the field, and provides the information previously
  54 # supplied by (1) above.
  55 #
  56 
  57 use vars qw($script $usage $readme $cnt);
  58 use vars qw($debug $last_cr $wsname $date);
  59 
  60 # Use the basename of the name we're invoked under as the script name
  61 @_ = split /\//, $0;
  62 $script = $_[$#_];
  63 $usage = "usage: $script [-d] [readme-file]\n";
  64 
  65 $debug = 0;
  66 # Process the options
  67 while ((scalar(@ARGV) > 0) && ($_ = $ARGV[0],/^-/)) {
  68   ARG: {
  69         if (/^-d$/) {
  70                 $debug = 1;
  71                 last ARG;
  72         }
  73 
  74 
  75       # If it gets here, the option is unknown.
  76       die $usage;
  77   }
  78     shift;
  79 }
  80 
  81 # Plain argument
  82 $cnt = scalar @ARGV;
  83 {
  84         if ($cnt == 0) {
  85                 $readme = 'SUNWonld-README';
  86                 next;
  87         }
  88 
  89         if ($cnt == 1) {
  90                 $readme = $ARGV[0];
  91                 next;
  92         }
  93 
  94         die $usage;
  95 }
  96 
  97 
  98 open(FILE, $readme) || die "$script: Unable to open $readme\n";
  99 
 100 # At the date this script was put into service, the SCCS revision
 101 # of SUNWonld-README was 1.627, and SUNWonld-README had 588 unique
 102 # CRs. Revisions are supposed to always increase monotonically, so
 103 # we add 1000 to the number of unique CRs.
 104 #
 105 # This means that any linker with a version <1000 was built using
 106 # the SCCS revision, and any linker with version >=1000 was built
 107 # with this script.
 108 $cnt = 1000;
 109 
 110 while ($_ = <FILE>) {
 111         chomp $_;
 112 
 113         # If the line starts with a number, it is taken as a CR.
 114         if ($_ =~ /^(\d+)\s/) {
 115                 $cnt++;
 116                 $last_cr = $1;
 117         }
 118 }
 119 close FILE;
 120 
 121 # If this is a standard build, the revision # is all we want
 122 if ($debug == 0) {
 123         print "1.$cnt\n";
 124         exit 0;
 125 }
 126 
 127 # For debug mode, add diagnostic data
 128 ($wsname = $ENV{'CODEMGR_WS'}) ne '' || ($wsname = 'unknown');
 129 @wsname = split /\//, $wsname;
 130 $wsname = $wsname[$#wsname];
 131 
 132 $date = `date +%m/%d/%y`;
 133 
 134 print "1.$cnt:$wsname-$ENV{USER}-$last_cr-$date\n";
 135 
 136 exit 0;