135 lines
2.7 KiB
Perl
Executable file
135 lines
2.7 KiB
Perl
Executable file
#!/usr/bin/env perl
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use strict;
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my $error;
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my %state;
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sub usage() {
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die <<EOF;
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Usage: $0 <file> <command> [<arguments>]
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Commands:
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add-hash <variable> <value>
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fix-hash <variable> <value>
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rename-var <variable> <name>
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EOF
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}
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sub set_var($) {
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my $var = shift;
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$state{var} = $var;
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if ($var =~ /(.*):(.*)/) {
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$state{template} = $1;
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$state{var} = $2;
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$state{related_var} = "URL";
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} else {
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$state{context} = 1;
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$state{related_var} = "PKG_SOURCE_URL";
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}
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}
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my %check_command = (
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"add-hash" => sub {
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set_var($ARGV[0]);
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$state{value} = $ARGV[1];
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length($ARGV[1]) == 64 or die "Invalid hash value\n";
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},
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"fix-hash" => sub {
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set_var($ARGV[0]);
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$state{value} = $ARGV[1];
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$state{prev_value} = $ARGV[2];
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length($ARGV[1]) == 64 or die "Invalid hash value\n";
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},
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"rename-var" => sub {
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set_var($ARGV[0]);
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$state{new_var} = $ARGV[1];
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$state{new_var} =~ s/.*://g;
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},
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);
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sub check_context($) {
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my $line = shift;
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return unless $state{template};
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$state{next} and do {
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$state{context} = 1;
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undef $state{next};
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return;
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};
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if (not $state{context}) {
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$line =~ /^\s*define\s+$state{template}/ and $state{next} = 1;
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} else {
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$line =~ /^\s*endef/ and do {
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$state{done} = 1;
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undef $state{context};
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}
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}
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}
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my %commands = (
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"add-hash" => sub {
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my $line = shift;
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check_context($line);
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return $line unless $state{context};
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# skip existing hash variable
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return "" if $line =~ /^(\s*)$state{var}(\s*):?=(\s*)(.*)\n/;
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# insert md5sum after related variable
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return $line unless $line =~ /^(\s*)$state{related_var}(\s*):?=(\s*)(.*)\n/;
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return "$line$1$state{var}$2:=$3$state{value}\n";
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},
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"fix-hash" => sub {
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my $line = shift;
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check_context($line);
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return $line unless $state{context};
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return $line unless $line =~ /^(\s*)$state{var}(\s*):?=(\s*)(.*)$state{prev_value}(.*)\n/;
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$state{done} = 1;
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$4 =~ /\$/ and do {
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warn "$state{var} contains a reference to another variable, can't fix automatically\n";
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return $line;
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};
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return "$1$state{var}$2:=$3$state{value}\n";
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},
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"rename-var" => sub {
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my $line = shift;
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check_context($line);
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return $line unless $state{context};
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return $line unless $line =~ /^(\s*)$state{var}(\s*:?=.*)\n/;
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return "$1$state{new_var}$2\n";
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},
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);
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my $file = shift @ARGV;
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my $command = shift @ARGV;
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($file and $command and $check_command{$command}) or usage;
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&{$check_command{$command}}();
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-f $file or die "File $file not found\n";
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open IN, "<${file}" or die "Cannot open input file\n";
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open OUT, ">${file}.new" or die "Cannot open output file\n";
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my $cmd = $commands{$command};
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while (my $line = <IN>) {
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$line = &$cmd($line) unless $state{done};
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print OUT $line;
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last if $error;
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}
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close OUT;
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close IN;
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$error and do {
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unlink "${file}.new";
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exit 1;
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};
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rename "${file}.new", "$file";
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