scripts/fixup-makefile.pl

   1 #!/usr/bin/env perl
   2 use strict;
   3
   4 my $error;
   5 my %state;
   6
   7 sub usage() {
   8 die <<EOF;
   9 Usage: $0 <file> <command> [<arguments>]
  10
  11 Commands:
  12 add-hash <variable> <value>
  13 fix-hash <variable> <value>
  14 rename-var <variable> <name>
  15
  16 EOF
  17 }
  18
  19 sub set_var($) {
  20         my $var = shift;
  21
  22         $state{var} = $var;
  23         if ($var =~ /(.*):(.*)/) {
  24                 $state{template} = $1;
  25                 $state{var} = $2;
  26                 $state{related_var} = "URL";
  27         } else {
  28                 $state{context} = 1;
  29                 $state{related_var} = "PKG_SOURCE";
  30         }
  31 }
  32
  33 my %check_command = (
  34         "add-hash" => sub {
  35                 set_var($ARGV[0]);
  36
  37                 $state{value} = $ARGV[1];
  38                 length($ARGV[1]) == 64 or die "Invalid hash value\n";
  39         },
  40         "fix-hash" => sub {
  41                 set_var($ARGV[0]);
  42
  43                 $state{value} = $ARGV[1];
  44                 $state{prev_value} = $ARGV[2];
  45
  46                 length($ARGV[1]) == 64 or die "Invalid hash value\n";
  47         },
  48         "rename-var" => sub {
  49                 set_var($ARGV[0]);
  50                 $state{new_var} = $ARGV[1];
  51                 $state{new_var} =~ s/.*://g;
  52         },
  53 );
  54
  55 sub check_context($) {
  56         my $line = shift;
  57         return unless $state{template};
  58
  59         $state{next} and do {
  60                 $state{context} = 1;
  61                 undef $state{next};
  62                 return;
  63         };
  64
  65         if (not $state{context}) {
  66                 $line =~ /^\s*define\s+$state{template}/ and $state{next} = 1;
  67         } else {
  68                 $line =~ /^\s*endef/ and do {
  69                         $state{done} = 1;
  70                         undef $state{context};
  71                 }
  72         }
  73 }
  74
  75 my %commands = (
  76         "add-hash" => sub {
  77                 my $line = shift;
  78                 check_context($line);
  79                 return $line unless $state{context};
  80
  81                 # skip existing hash variable
  82                 return "" if $line =~ /^(\s*)$state{var}(\s*):?=(\s*)(.*)\n/;
  83
  84                 # insert md5sum after related variable
  85                 return $line unless $line =~ /^(\s*)$state{related_var}(\s*):?=(\s*)(.*)\n/;
  86                 return "$line$1$state{var}$2:=$3$state{value}\n";
  87         },
  88         "fix-hash" => sub {
  89                 my $line = shift;
  90                 check_context($line);
  91                 return $line unless $state{context};
  92                 return $line unless $line =~ /^(\s*)$state{var}(\s*):?=(\s*)(.*)$state{prev_value}(.*)\n/;
  93                 $state{done} = 1;
  94                 $4 =~ /\$/ and do {
  95                         warn "$state{var} contains a reference to another variable, can't fix automatically\n";
  96                         return $line;
  97                 };
  98                 return "$1$state{var}$2:=$3$state{value}\n";
  99         },
 100         "rename-var" => sub {
 101                 my $line = shift;
 102                 check_context($line);
 103                 return $line unless $state{context};
 104                 return $line unless $line =~ /^(\s*)$state{var}(\s*:?=.*)\n/;
 105                 return "$1$state{new_var}$2\n";
 106         },
 107 );
 108
 109 my $file = shift @ARGV;
 110 my $command = shift @ARGV;
 111
 112 ($file and $command and $check_command{$command}) or usage;
 113 &{$check_command{$command}}();
 114
 115 -f $file or die "File $file not found\n";
 116
 117 open IN, "<${file}" or die "Cannot open input file\n";
 118 open OUT, ">${file}.new" or die "Cannot open output file\n";
 119
 120 my $cmd = $commands{$command};
 121 while (my $line = <IN>) {
 122         $line = &$cmd($line) unless $state{done};
 123         print OUT $line;
 124         last if $error;
 125 }
 126
 127 close OUT;
 128 close IN;
 129
 130 $error and do {
 131         unlink "${file}.new";
 132         exit 1;
 133 };
 134
 135 rename "${file}.new", "$file";