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|
#! /usr/bin/perl -w
#/*@@
# @file ConfigurationParser.pl
# @date Tue Feb 8 17:36:48 2000
# @author Tom Goodale
# @desc
# Parser for configuration.ccl files
# @enddesc
# @version $Header$
#@@*/
#/*@@
# @routine CreateConfigurationDatabase
# @date Tue Feb 8 17:47:26 2000
# @author Tom Goodale
# @desc
# Parses the information in all the thorns' configuration.ccl files
# and creates a database from it
# @enddesc
#@@*/
sub CreateConfigurationDatabase
{
my($config_dir, %thorns) = @_;
my(%cfg) = ();
my(%thorn_dependencies);
# Loop through each thorn's configuration file.
foreach my $thorn (sort keys %thorns)
{
my $filename = "$thorns{$thorn}/configuration.ccl";
next if (! -r $filename);
# Get the configuration data from it
&ParseConfigurationCCL($config_dir, $thorn, \%cfg, \%thorns, $filename);
# if($debug)
# {
# print " $thorn\n";
# print " Provides: ", $cfg{"\U$thorn\E PROVIDES"}, "\n"
# if ($cfg{"\U$thorn\E PROVIDES"});
# print " Requires: ", $cfg{"\U$thorn\E REQUIRES"}, "\n"
# if ($cfg{"\U$thorn\E REQUIRES"});
# print " Optional: ", $cfg{"\U$thorn\E OPTIONAL"}, "\n"
# if ($cfg{"\U$thorn\E OPTIONAL"});
# }
$cfg{"\U$thorn\E USES THORNS"} = '';
# verify that all required thorns are there in the ThornList
next if (! $cfg{"\U$thorn\E REQUIRES THORNS"});
my @missing = ();
foreach my $required (split (' ', $cfg{"\U$thorn\E REQUIRES THORNS"}))
{
push (@missing, $required)
if ((! $thorns{"$required"}) && (! $thorns{"\U$required\E"}));
}
if (@missing == 1)
{
&CST_error (0, "Thorn '$thorn' requires thorn '@missing'. " .
'Please add this thorn to your ThornList or remove ' .
"'$thorn' from it !");
}
elsif (@missing > 1)
{
&CST_error (0, "Thorn '$thorn' requires thorns '@missing'. " .
'Please add these thorns to your ThornList or ' .
"remove '$thorn' from it !");
}
$cfg{"\U$thorn\E USES THORNS"} .= $cfg{"\U$thorn\E REQUIRES THORNS"} . ' ';
}
# Turn optional capabilities into required capabilities, if the
# capability is provided. This way we don't have to treat required
# and optional requirements differently.
my %providedcaps;
foreach my $thorn (sort keys %thorns)
{
if ($cfg{"\U$thorn\E PROVIDES"})
{
foreach my $providedcap (split (' ', $cfg{"\U$thorn\E PROVIDES"}))
{
$providedcaps{$providedcap} = 1;
}
}
}
foreach my $thorn (sort keys %thorns)
{
if ($cfg{"\U$thorn\E OPTIONAL"})
{
foreach my $optionalcap (split (' ', $cfg{"\U$thorn\E OPTIONAL"}))
{
if ($providedcaps{$optionalcap})
{
$cfg{"\U$thorn\E REQUIRES"} .= "$optionalcap ";
}
}
}
}
foreach my $thorn (sort keys %thorns)
{
# verify that all required capabilities are there in the ThornList
next if (! $cfg{"\U$thorn\E REQUIRES"});
foreach my $requiredcap (split (' ', $cfg{"\U$thorn\E REQUIRES"}))
{
my @found = ();
foreach my $thorncap (sort keys %thorns)
{
foreach my $cap (split (' ', $cfg{"\U$thorncap\E PROVIDES"}))
{
push (@found, $thorncap)
if ("\U$cap\E" eq "\U$requiredcap\E");
}
}
# there must be exactly one thorn providing a required capability
if (@found == 0)
{
&CST_error (0, "Thorn '$thorn' requires the capability " .
"'$requiredcap'.\n" .
" Please add a thorn that provides '$requiredcap' " .
"to your ThornList or remove '$thorn' from it !")
}
elsif (@found > 1)
{
&CST_error (0, "More than one thorn provides the capability " .
"'$requiredcap'.\n" .
" These thorns are: '@found'.\n" .
" Please use only one !\n");
}
else
{
$cfg{"\U$thorn\E USES THORNS"} .= $found[0] . ' ';
}
}
}
# Check for cyclic dependencies
# create a hash with thorn-> used thorns (no prefix)
foreach my $thorn (sort keys %thorns)
{
$thorn_dependencies{uc($thorn)}=$cfg{"\U$thorn\E USES THORNS"};
$thorn_dependencies{uc($thorn)} =~ s/\b$thorn\b//i;
}
my $message = &find_dep_cycles(%thorn_dependencies);
if ("" ne $message)
{
$message =~ s/^\s*//g;
$message =~ s/\s*$//g;
$message =~ s/\s+/->/g;
$message = "Found a cyclic dependency in configuration requirements:".$message."\n";
&CST_error(0, $message);
}
return \%cfg;
}
#/*@@
# @routine ParseConfigurationCCL
# @date Tue Feb 8 19:23:18 2000
# @author Tom Goodale
# @desc
# Parses a configuration.ccl file and generates a database of the values
# @enddesc
#@@*/
sub ParseConfigurationCCL
{
my($config_dir, $thorn, $cfg, $thorns, $filename) = @_;
my(@data);
my($line_number, $line);
my($provides, $script, $lang, $options);
my($optional, $define);
# Initialise some stuff to prevent perl -w from complaining.
$cfg->{"\U$thorn\E PROVIDES"} = '';
$cfg->{"\U$thorn\E REQUIRES"} = '';
$cfg->{"\U$thorn\E REQUIRES THORNS"} = '';
$cfg->{"\U$thorn\E OPTIONAL"} = '';
$cfg->{"\U$thorn\E OPTIONS"} = '';
# Read the data
@data = &read_file($filename);
for($line_number = 0; $line_number < @data; $line_number++)
{
$line = $data[$line_number];
# Parse the line
if($line =~ m/^\s*PROVIDES\s*/i)
{
$lang = $script = '';
($provides, $script, $lang, $options, $line_number) = &ParseProvidesBlock($line_number, \@data);
if ($provides !~ m{^[A-Za-z0-9_.]+$}) {
&CST_error (0, "Illegal capability name '$provides' line '$line' in
configure.ccl of thorn '$thorn'");
}
if ($script !~ m{^[A-Za-z0-9_.]*$}) {
&CST_error (0, "Illegal script name '$script' line '$line' in configure
.ccl of thorn '$thorn'");
}
if ($lang !~ m{^[A-Za-z0-9_.]*$}) {
&CST_error (0, "Illegal script language '$lang' line '$line' in configu
re.ccl of thorn '$thorn'");
}
$cfg->{"\U$thorn\E PROVIDES"} .= "$provides ";
if($script)
{
$cfg->{"\U$thorn\E PROVIDES \U$provides\E SCRIPT"} = "$thorns->{$thorn}/$script";
}
$cfg->{"\U$thorn\E PROVIDES \U$provides\E LANG"} = $lang;
$cfg->{"\U$thorn\E PROVIDES \U$provides\E OPTIONS"} = $options;
# if ($script)
# {
# print "Running configuration script '$script'\n";
#
# &ParseConfigScript($config_dir, $provides, $lang, $script,
# $thorn, $cfg);
# print "\n";
# }
next;
}
elsif($line =~ m/^\s*REQUIRES\s+THORNS\s*:\s*(.*)/i)
{
my $newlist = $1;
$newlist =~ s/\b$thorn\b//i;
$newlist =~ s/,/ /g;
my $oldlist = $cfg->{"\U$thorn\E REQUIRES THORNS"};
my $list = $oldlist . ' ' . $newlist;
$list = join (' ', sort split (' ', $list));
$cfg->{"\U$thorn\E REQUIRES THORNS"} = $list;
# if ($cfg->{"\U$thorn\E REQUIRES THORNS"})
# {
# &CST_error (3, '\'Requires Thorns\' will not be supported in release beta-14' .
# "\n Please adjust thorn \U$thorn\E to use \'Requires\' instead.");
# }
}
elsif($line =~ m/^\s*REQUIRES\s*(.*)/i)
{
my $cap = $1;
if ($cap !~ m{^[A-Za-z0-9_. ]+$}) {
&CST_error (0, "Illegal required capability '$cap' line '$line' in configure.ccl of thorn '$thorn'");
}
$cfg->{"\U$thorn\E REQUIRES"} .= "$cap ";
}
elsif($line =~ m/^\s*OPTIONAL\s*/i)
{
($optional, $define, $line_number) = &ParseOptionalBlock($filename, $line_number, \@data);
if ($optional !~ m{^[A-Za-z0-9_. ]+$}) {
&CST_error (0, "Illegal optional capability '$optional' line '$line' in configure.ccl of thorn '$thorn'");
}
$cfg->{"\U$thorn\E OPTIONAL"} .= "$optional ";
$cfg->{"\U$thorn\E OPTIONAL \U$optional\E DEFINE"} = $define;
}
elsif($line =~ m/^\s*NO_SOURCE\s*/i)
{
$cfg->{"\U$thorn\E OPTIONS"} .= "NO_SOURCE";
}
else
{
chomp($line);
&CST_error (0, "Unrecognised line '$line' in configure.ccl of thorn '$thorn'");
}
}
}
#/*@@
# @routine ParseProvidesBlock
# @date Mon May 8 15:52:40 2000
# @author Tom Goodale
# @desc
# Parses the PROVIDES block in a configuration.ccl file.
# @enddesc
#@@*/
sub ParseProvidesBlock
{
my ($line_number, $data) = @_;
my ($provides, $script, $lang, $options);
$provides = "";
$script = "";
$lang = "";
$options = [];
$data->[$line_number] =~ m/^\s*PROVIDES\s*(.*)/i;
$provides = $1;
$line_number++;
if($data->[$line_number] !~ m/^\s*\{\s*$/)
{
&CST_error (0, "Error parsing provides block line '$data->[$line_number]' $file_name:$line_number ".
'Missing { at start of block');
$line_number++ while(defined($data->[$line_number]) and $data->[$line_number] !~ m:\s*\}\s*:);
}
else
{
while(defined($data->[$line_number]) and $data->[$line_number] !~ m:\s*\}\s*:)
{
$line_number++;
if($data->[$line_number] =~ m/^\s*SCRIPT\s*(.*)$/i)
{
$script = $1;
next;
}
elsif($data->[$line_number] =~ m/^\s*LANG[^\s]*\s*(.*)$/i)
{
$lang = $1;
next;
}
elsif($data->[$line_number] =~ m/^\s*OPTIONS[^\s]*\s*(.*)$/i)
{
push(@$options, split(' ',$1));
next;
}
elsif($data->[$line_number] =~ m:\s*\}\s*:)
{
# do nothing.
}
else
{
print STDERR "Error parsing provides block line '$data->[$line_number]'\n";
&CST_error (0, 'Unrecognised statement');
}
}
}
return ($provides, $script, $lang, $options, $line_number);
}
#/*@@
# @routine ParseOptionalBlock
# @date Mon May 8 15:52:40 2000
# @author Tom Goodale
# @desc
# Parses the OPTIONAL block in a configuration.ccl file.
# @enddesc
#@@*/
sub ParseOptionalBlock
{
my ($file_name, $line_number, $data) = @_;
my ($optional, $define);
$data->[$line_number] =~ m/^\s*OPTIONAL\s*(.*)/i;
$optional = $1;
$define = "";
$line_number++;
if($data->[$line_number] !~ m/^\s*\{\s*$/)
{
&CST_error (0, "Error parsing optional block line '$data->[$line_number]' $file_name:$line_number".
' Missing { at start of block.');
$line_number++ while(defined($data->[$line_number]) and $data->[$line_number] !~ m:\s*\}\s*:);
}
else
{
while(defined($data->[$line_number]) and $data->[$line_number] !~ m:\s*\}\s*:)
{
$line_number++;
if($data->[$line_number] =~ m/^\s*DEFINE\s*(.*)$/i)
{
if($define eq "")
{
$define = $1;
next;
}
else
{
&CST_error (0, "Error parsing optional block line '$data->[$line_number]' " . 'Only one define allowed.');
}
}
elsif($data->[$line_number] =~ m:\s*\}\s*:)
{
# do nothing.
}
else
{
&CST_error (0, "Error parsing provides block line '$data->[$line_number]' " . 'Unrecognised statement.');
}
}
}
return ($optional, $define, $line_number);
}
1;
|
