--- loncom/build/lpml_parse.pl 2001/12/12 23:20:47 1.30 +++ loncom/build/lpml_parse.pl 2020/10/07 19:55:39 1.62 @@ -1,11 +1,20 @@ #!/usr/bin/perl +# -------------------------------------------------------- Documentation notice +# Run "perldoc ./lpml_parse.pl" in order to best view the software +# documentation internalized in this program. + +# --------------------------------------------------------- Distribution notice +# This script is distributed with the LPML software project available at +# http://lpml.sourceforge.net + +# --------------------------------------------------------- License Information # The LearningOnline Network with CAPA # lpml_parse.pl - Linux Packaging Markup Language parser # -# $Id: lpml_parse.pl,v 1.30 2001/12/12 23:20:47 harris41 Exp $ +# $Id: lpml_parse.pl,v 1.62 2020/10/07 19:55:39 raeburn Exp $ # -# Written by Scott Harrison, harris41@msu.edu +# Written by Scott Harrison, codeharrison@yahoo.com # # Copyright Michigan State University Board of Trustees # @@ -35,7 +44,10 @@ # 9/5/2001,9/6,9/7,9/8 - Scott Harrison # 9/17,9/18 - Scott Harrison # 11/4,11/5,11/6,11/7,11/16,11/17 - Scott Harrison -# 12/2,12/3,12/4,12/5,12/6 - Scott Harrison +# 12/2,12/3,12/4,12/5,12/6,12/13,12/19,12/29 - Scott Harrison +# YEAR=2002 +# 1/8,1/9,1/29,1/31,2/5,3/21,4/8,4/12 - Scott Harrison +# 4/21,4/26,5/19,5/23,10/13 - Scott Harrison # ### @@ -66,11 +78,15 @@ use HTML::TokeParser; my $usage=<; -my $parsestring = join('',@parsecontents); -my $outstring; +# -------------------------- Start first pass through (just gather information) +my @parsecontents=<>; +my $parsestring=join('',@parsecontents); # Need to make a pass through and figure out what defaults are -# overrided. Top-down overriding strategy (leaves don't know -# about distant leaves). +# overrided. Top-down overriding strategy (tree leaves don't know +# about distant tree leaves). my @hierarchy; $hierarchy[0]=0; @@ -149,20 +172,32 @@ my $token; $parser = HTML::TokeParser->new(\$parsestring) or die('can\'t create TokeParser object'); $parser->xml_mode('1'); -my %hash; -my $key; -while ($token = $parser->get_token()) { +my %setting; + +# Values for the %setting hash +my $defaultset=1; # a default setting exists for a key +my $distset=2; # a distribution setting exists for a key + # (overrides default setting) + +my $key=''; # this is a unique key identifier (the token name with its + # coordinates inside the hierarchy) +while ($token = $parser->get_token()) { # navigate through $parsestring if ($token->[0] eq 'S') { $hloc++; $hierarchy[$hloc]++; $key=$token->[1].join(',',@hierarchy[0..($hloc-1)]); my $thisdist=' '.$token->[2]{'dist'}.' '; if ($thisdist eq ' default ') { - $hash{$key}=1; # there is a default setting for this key + $setting{$key}=$defaultset; } - elsif ($dist && $hash{$key}==1 && $thisdist=~/\s$dist\s/) { - $hash{$key}=2; # disregard default setting for this key if - # there is a directly requested distribution match + elsif (length($dist)>0 && + $setting{$key}==$defaultset && + $thisdist=~/\s$dist\s/) { + $setting{$key}=$distset; + # disregard default setting for this key if + # there is a directly requested distribution match + # (in other words, there must first be a default + # setting for a key in order for it to be overridden) } } if ($token->[0] eq 'E') { @@ -170,57 +205,79 @@ while ($token = $parser->get_token()) { } } -# --------------------------------------------------- Start second pass through -undef $hloc; -undef @hierarchy; -undef $parser; -$hierarchy[0]=0; +# - Start second pass through (clean up the string to allow for easy rendering) + +# The string is cleaned up so that there is no white-space surrounding any +# XML tag. White-space inside text 'T' elements is preserved. + +# Clear up memory +undef($hloc); +undef(@hierarchy); +undef($parser); +$hierarchy[0]=0; # initialize hierarchy $parser = HTML::TokeParser->new(\$parsestring) or die('can\'t create TokeParser object'); $parser->xml_mode('1'); -my $cleanstring; -while ($token = $parser->get_token()) { - if ($token->[0] eq 'S') { +my $cleanstring; # contains the output of the second step +while ($token = $parser->get_token()) { # navigate through $parsestring + if ($token->[0] eq 'S') { # a start tag $hloc++; $hierarchy[$hloc]++; $key=$token->[1].join(',',@hierarchy[0..($hloc-1)]); - my $thisdist=' '.$token->[2]{'dist'}.' '; + + # Surround tagdist (the dist attribute of an XML tag) + # with white-space to allow for uniform searching a few + # lines below here. + my $tagdist=' '.$token->[2]{'dist'}.' '; + # This conditional clause is set up to ignore two sets # of invalid conditions before accepting entry into - # the cleanstring. - if ($hash{$key}==2 and - !($thisdist eq ' ' or $thisdist =~/\s$dist\s/)) { + # $cleanstring. + + # Condition #1: Ignore this part of the string if the tag + # has a superior distribution-specific setting and the tag + # being evaluated has a dist setting something other than + # blank or $dist. + if ($setting{$key}==$distset and + !($tagdist eq ' ' or $tagdist =~/\s$dist\s/)) { if ($token->[4]!~/\/>$/) { $parser->get_tag('/'.$token->[1]); $hloc--; } } - elsif ($thisdist ne ' ' and $thisdist!~/\s$dist\s/ and - !($thisdist eq ' default ' and $hash{$key}!=2)) { + # Condition #2: Ignore this part of the string if the tag has + # is not blank and does not equal dist and + # either does not equal default or it has a prior $dist-specific + # setting. + elsif ($tagdist ne ' ' and $tagdist!~/\s$dist\s/ and + !($tagdist eq ' default ' and $setting{$key}!=$distset)) { if ($token->[4]!~/\/>$/) { $parser->get_tag('/'.$token->[1]); $hloc--; } } + # In other words, output to $cleanstring if the tag is dist=default + # or if the tag is set to dist=$dist for the first time. And, always + # output when dist='' is not present. else { $cleanstring.=$token->[4]; } - if ($token->[4]=~/\/>$/) { - $hloc--; - } } - if ($token->[0] eq 'E') { + # Note: this loop DOES work with style markup as well as + # style markup since I always check for $token->[4] ending + # with "/>". + if ($token->[0] eq 'E') { # an end tag $cleanstring.=$token->[2]; $hloc--; } - if ($token->[0] eq 'T') { + if ($token->[0] eq 'T') { # text contents inside tags $cleanstring.=$token->[1]; } } $cleanstring=&trim($cleanstring); $cleanstring=~s/\>\s*\n\s*\\xml_mode('1'); # Define handling methods for mode-dependent text rendering $parser->{textify}={ + specialnotices => \&format_specialnotices, + specialnotice => \&format_specialnotice, targetroot => \&format_targetroot, sourceroot => \&format_sourceroot, categories => \&format_categories, category => \&format_category, abbreviation => \&format_abbreviation, targetdir => \&format_targetdir, + protectionlevel => \&format_protectionlevel, chown => \&format_chown, chmod => \&format_chmod, rpm => \&format_rpm, @@ -319,6 +377,7 @@ $parser->{textify}={ rpmAutoReqProv => \&format_rpmAutoReqProv, rpmdescription => \&format_rpmdescription, rpmpre => \&format_rpmpre, + rpmRequires => \&format_rpmRequires, directories => \&format_directories, directory => \&format_directory, categoryname => \&format_categoryname, @@ -333,8 +392,10 @@ $parser->{textify}={ target => \&format_target, note => \&format_note, build => \&format_build, + installscript => \&format_installscript, status => \&format_status, dependencies => \&format_dependencies, + privatedependencies => \&format_privatedependencies, buildlink => \&format_buildlink, glob => \&format_glob, sourcedir => \&format_sourcedir, @@ -365,13 +426,6 @@ exit; # ------------------------ Final output at end of markup parsing and formatting sub end { if ($mode eq 'html') { - # START TEMP WAY -# my $totallinecount; -# my $totalbytecount; -# map {$totallinecount+=$linecount{$_}; -# $totalbytecount+=$bytecount{$_}} -# @categorynamelist; - # END TEMP WAY return "
 
". "Summary of Source Repository". "". @@ -399,23 +453,16 @@ sub end { "". "". "". + "". + "". join("\n",(map {"". - ""} + "". + ""} @categorynamelist)). "
File Category Count
IconNameNumber of OccurrencesNumber of Incorrect Counts
$_$categorycount{$_}
$_$categorycount{$_}
". "\n"; -# START TEMP WAY -# join("\n",(map {"". -# "$_$categorycount{$_}$linecount{$_}$bytecount{$_}"} -# @categorynamelist)). -# "
 
". -# "Total Lines of Code: $totallinecount". -# "
 
". -# "Total Bytes: $totalbytecount". -# END TEMP WAY } if ($mode eq 'install') { return ''; @@ -491,7 +538,7 @@ END print ' by Scott Harrison 2001'."\n"; print '# This file was automatically generated on '.`date`; print "\n".$invocation; - $lpml .= "SHELL=\"/bin/bash\"\n\n"; + $lpml .= "\n"; } elsif ($mode eq 'configinstall') { print '# LPML configuration file targets (configinstall).'."\n"; @@ -499,14 +546,14 @@ END print ' by Scott Harrison 2001'."\n"; print '# This file was automatically generated on '.`date`; print "\n".$invocation; - $lpml .= "SHELL=\"/bin/bash\"\n\n"; + $lpml .= "\n"; } elsif ($mode eq 'build') { $lpml = "# LPML build targets. Linux Packaging Markup Language,"; $lpml .= ' by Scott Harrison 2001'."\n"; $lpml .= '# This file was automatically generated on '.`date`; $lpml .= "\n".$invocation; - $lpml .= "SHELL=\"/bin/sh\"\n\n"; + $lpml .= "\n"; } else { return ''; @@ -605,6 +652,8 @@ sub format_category { my ($user,$group)=split(/\:/,$chown); $categoryhash{$category_att_name}='-o '.$user.' -g '.$group. ' -m '.$chmod; + $categoryhash{"chmod.".$category_att_name}=$chmod; + $categoryhash{"chown.".$category_att_name}=$chown; } return ''; } @@ -659,6 +708,9 @@ $text END } + elsif ($mode eq 'make_rpm') { + return $text; + } elsif ($mode eq 'text') { return $rpm=<$text +END + } else { return ''; } @@ -694,6 +751,11 @@ sub format_rpmName { elsif ($mode eq 'text') { return $rpmName="\nName : $text"; } + elsif ($mode eq 'make_rpm') { + return <$text +END + } else { return ''; } @@ -736,6 +798,11 @@ sub format_rpmVendor { elsif ($mode eq 'text') { return $rpmVendor="\nVendor : $text"; } + elsif ($mode eq 'make_rpm') { + return <$text +END + } else { return ''; } @@ -764,6 +831,11 @@ sub format_rpmCopyright { elsif ($mode eq 'text') { return $rpmCopyright="\nLicense : $text"; } + elsif ($mode eq 'make_rpm') { + return <$text +END + } else { return ''; } @@ -778,6 +850,11 @@ sub format_rpmGroup { elsif ($mode eq 'text') { return $rpmGroup="\nGroup : $text"; } + elsif ($mode eq 'make_rpm') { + return <Utilities/System +END + } else { return ''; } @@ -803,9 +880,14 @@ sub format_rpmAutoReqProv { if ($mode eq 'html') { return $rpmAutoReqProv="\nAutoReqProv : $text"; } - if ($mode eq 'text') { + elsif ($mode eq 'text') { return $rpmAutoReqProv="\nAutoReqProv : $text"; } + elsif ($mode eq 'make_rpm') { + return <$text +END + } else { return ''; } @@ -824,6 +906,13 @@ sub format_rpmdescription { $text=~s/\\n/\n/g; return $rpmdescription="\nDescription : $text"; } + elsif ($mode eq 'make_rpm') { + $text=~s/\n//g; + $text=~s/\\n/\n/g; + return <$text +END + } else { return ''; } @@ -836,9 +925,41 @@ sub format_rpmpre { # return $rpmpre="\n
RPMPRE $text"; return ''; } + elsif ($mode eq 'make_rpm') { + return <$text +END + } + else { + return ''; + } +} +# -------------------------------------------------- Format requires section +sub format_rpmRequires { + my @tokeninfo=@_; + my $aref; + my $text; + if ($mode eq 'make_rpm') { + while ($aref=$parser->get_token()) { + if ($aref->[0] eq 'E' && $aref->[1] eq 'rpmRequires') { + last; + } + elsif ($aref->[0] eq 'S') { + $text.=$aref->[4]; + } + elsif ($aref->[0] eq 'E') { + $text.=$aref->[2]; + } + else { + $text.=$aref->[1]; + } + } + } else { + $parser->get_tag('/rpmRequires'); return ''; } + return ''.$text.''; } # -------------------------------------------------- Format directories section sub format_directories { @@ -864,7 +985,13 @@ sub format_directories { } elsif ($mode eq 'install') { return "\n".'directories:'."\n".$text; - } + } + elsif ($mode eq 'rpm_file_list') { + return $text; + } + elsif ($mode eq 'uninstall_shell_commands') { + return $text; + } else { return ''; } @@ -872,7 +999,7 @@ sub format_directories { # ---------------------------------------------------- Format directory section sub format_directory { my (@tokeninfo)=@_; - $targetdir='';$categoryname='';$description=''; + $targetdir='';$categoryname='';$description='';$protectionlevel=''; $parser->get_text('/directory'); $parser->get_tag('/directory'); $directory_count++; @@ -887,7 +1014,9 @@ sub format_directory { my ($chmod,$chown)=split(/\s/,$categoryhash{$categoryname}); return $directory="\n". "$categoryname". - " ". + "". + " ". "$chmod
$chown". "$thtml". "". @@ -901,6 +1030,39 @@ sub format_directory { return "\t".'install '.$categoryhash{$categoryname}.' -d '. $targetroot.'/'.$targetdir."\n"; } + elsif ($mode eq 'rpm_file_list') { + return $targetroot.'/'.$targetdir."\n"; + } + elsif ($mode eq 'uninstall_shell_commands') { + if ($protectionlevel eq 'never_delete') { + return 'echo "LEAVING BEHIND '.$targetroot.'/'.$targetdir. + ' which may have important data worth saving"'."\n"; + } + elsif ($protectionlevel eq 'weak_delete') { + if ($targetdir!~/\w/) { + die("targetdir=\"$targetdir\"! NEVER EVER DELETE THE WHOLE ". + "FILESYSTEM"."\n"); + } + return 'rm -Rvf -i '.$targetroot.'/'.$targetdir."\n"; + } + elsif ($protectionlevel =~ /never/) { + die("CONFUSING PROTECTION LEVEL \"$protectionlevel\" FOUND ". + "FOR directory $targetdir"."\n"); + } + elsif ($protectionlevel !~ + /^never_delete|weak_delete|modest_delete|strong_delete|absolute_delete$/) { + die("CONFUSING OR MISSING PROTECTION LEVEL \"$protectionlevel\" ". + "FOUND FOR directory $targetdir\n"); + } + else { + if ($targetdir!~/\w/) { + die("targetdir=\"$targetdir\"! NEVER EVER DELETE THE WHOLE ". + "FILESYSTEM"."\n"); + } + return 'rm -Rvf '.$targetroot.'/'.$targetdir. + "| grep 'removed directory'"."\n"; + } + } else { return ''; } @@ -916,6 +1078,17 @@ sub format_targetdir { } return ''; } +# ---------------------------------------------- Format protectionlevel section +sub format_protectionlevel { + my @tokeninfo=@_; + $protectionlevel=''; + my $text=&trim($parser->get_text('/protectionlevel')); + if ($text) { + $parser->get_tag('/protectionlevel'); + $protectionlevel=$text; + } + return ''; +} # ------------------------------------------------- Format categoryname section sub format_categoryname { my @tokeninfo=@_; @@ -942,7 +1115,10 @@ sub format_description { sub format_files { my $text=$parser->get_text('/files'); $parser->get_tag('/files'); - if ($mode eq 'html') { + if ($mode eq 'MANIFEST') { + return $text; + } + elsif ($mode eq 'html') { return $directories="\n
 
". "". "Files
 
". @@ -980,8 +1156,14 @@ sub format_files { foreach my $bi (@buildinfo) { my ($target,$source,$command,$trigger,@deps)=split(/\;/,$bi); $tword=''; $tword=' alwaysrun' if $trigger eq 'always run'; - $command=~s/\/([^\/]*)$//; - $command2="cd $command; sh ./$1;\\"; + if ($command!~/\s/) { + $command=~s/\/([^\/]*)$//; + $command2="cd $command; $shell ./$1;\\"; + } + else { + $command=~s/(.*?\/)([^\/]+\s+.*)$/$1/; + $command2="cd $command; $shell ./$2;\\"; + } my $depstring; my $depstring2="\t\t\@echo '';\\\n"; my $olddep; @@ -1017,6 +1199,9 @@ sub format_files { $binfo."\n". "alwaysrun:\n\n"; } + elsif ($mode eq 'rpm_file_list') { + return $text; + } else { return ''; } @@ -1044,24 +1229,35 @@ sub format_links { sub format_file { my @tokeninfo=@_; $file=''; $source=''; $target=''; $categoryname=''; $description=''; - $note=''; $build=''; $status=''; $dependencies=''; + $note=''; $build=''; $status=''; $dependencies=''; $installscript=''; + $buildlink = ''; my $text=&trim($parser->get_text('/file')); my $buildtest; $file_count++; $categorycount{$categoryname}++; - # START TEMP WAY -# if (-T "$sourcerootarg/$source") { -# $linecount{$categoryname}+=`wc -l $sourcerootarg/$source`; -# } -# my $bytesize=(-s "$sourcerootarg/$source"); -# $bytecount{$categoryname}+=$bytesize; - # END TEMP WAY if ($source) { $parser->get_tag('/file'); - if ($mode eq 'html') { + if ($mode eq 'MANIFEST') { + my $command=$build; + if ($command!~/\s/) { + $command=~s/\/([^\/]*)$//; + } + else { + $command=~s/(.*?\/)([^\/]+\s+.*)$/$1/; + } + $command=~s/^$sourceroot\///; + my (@deps)=split(/\;/,$dependencies); + my $retval=join("\n",($source, + (map {"$command$_"} @deps))); + if ($tokeninfo[2]{type} eq 'private') { + return "\n"; + } + return $retval."\n"; + } + elsif ($mode eq 'html') { return ($file="\n". "". - " ". @@ -1078,22 +1274,23 @@ sub format_file { # "$build $status $dependencies" . # "\nEND FILE"); } - elsif ($mode eq 'install' && $categoryname ne 'conf') { + elsif (($mode eq 'install') && (($categoryname ne 'conf') && + ($categoryname ne 'www conf'))) { if ($build) { my $bi=$sourceroot.'/'.$source.';'.$build.';'. $dependencies; my ($source2,$command,$trigger,@deps)=split(/\;/,$bi); $tword=''; $tword=' alwaysrun' if $trigger eq 'always run'; $command=~s/\/([^\/]*)$//; - $command2="cd $command; sh ./$1;\\"; + $command2="cd $command; $shell ./$1;\\"; my $depstring; foreach my $dep (@deps) { $depstring.=<get_text('/link')); - my @links; if ($linkto) { $parser->get_tag('/link'); if ($mode eq 'html') { @@ -1192,7 +1469,7 @@ sub format_link { $categorycount{$categoryname}++; push @links,("\n". "". - " ". ">/tmp/junk123"; -# print OUT "$linecount{$categoryname} $categoryname $sourcerootarg/$sourcedir/$f\n"; -# close OUT; -# } -# my $bytesize=(-s "$sourcerootarg/$sourcedir/$f"); -# $bytecount{$categoryname}+=$bytesize; -# } - # END TEMP WAY if ($sourcedir) { $parser->get_tag('/fileglob'); - if ($mode eq 'html') { + if ($mode eq 'MANIFEST') { + return join("\n",(map {"$sourcedir$_"} split(/\;/,$filenames2)))."\n"; + } + elsif ($mode eq 'html') { return $fileglob="\n". - " ". @@ -1289,11 +1566,21 @@ sub format_fileglob { if ($glob eq '*') { $eglob='[^C][^V][^S]'.$glob; } - return "\t".'install '. + return "\t".'install -p '. $categoryhash{$categoryname}.' '. $sourceroot.'/'.$sourcedir.$eglob.' '. $targetroot.'/'.$targetdir.'.'."\n"; } + elsif ($mode eq 'rpm_file_list') { + my $eglob=$glob; + if ($glob eq '*') { + $eglob='[^C][^V][^S]'.$glob; + } + my $targetdir2=$targetdir;$targetdir2=~s/\/$//; + my @gfiles=map {s/^.*\///;"$targetroot/$targetdir2/$_\n"} + glob("$sourceroot/$sourcedir/$eglob"); + return join('',@gfiles); + } else { return ''; } @@ -1369,17 +1656,29 @@ sub format_build { if ($text) { $parser->get_tag('/build'); $build=$sourceroot.'/'.$text.';'.$tokeninfo[2]{'trigger'}; + $build=~s/([^\\])\\\s+/$1/g; # allow for lines split onto new lines + } + return ''; +} +# ------------------------------------------------ Format installscript section +sub format_installscript { + my @tokeninfo=@_; + $installscript= &trim($parser->get_text('/installscript')); + if ($installscript) { + $parser->get_tag('/installscript'); + $installscript=~s/([^\\])\\\s+/$1/g; # allow for lines split onto new lines } return ''; } # -------------------------------------------------------- Format build section sub format_buildlink { my @tokeninfo=@_; - $buildlink=''; my $text=&trim($parser->get_text('/buildlink')); if ($text) { $parser->get_tag('/buildlink'); $buildlink=$sourceroot.'/'.$text; + } else { + $buildlink=''; } return ''; } @@ -1397,12 +1696,25 @@ sub format_status { # ------------------------------------------------- Format dependencies section sub format_dependencies { my @tokeninfo=@_; - $dependencies=''; my $text=&trim($parser->get_text('/dependencies')); if ($text) { $parser->get_tag('/dependencies'); - $dependencies=join(';', - (map {s/^\s*//;s/\s$//;$_} split(/\;/,$text))); + $dependencies=join(';',((map {s/^\s*//;s/\s$//;$_} split(/\;/,$text)),$dependencies)); + $dependencies=~s/;$//; + } else { + $dependencies=''; + } + return ''; +} +sub format_privatedependencies { + my @tokeninfo=@_; + #$dependencies=''; + my $text=&trim($parser->get_text('/privatedependencies')); + if ($text) { + $parser->get_tag('/privatedependencies'); + if ($mode eq 'MANIFEST') { return ''; } + $dependencies=join(';',((map {s/^\s*//;s/\s$//;$_} split(/\;/,$text)),$dependencies)); + $dependencies=~s/;$//; } return ''; } @@ -1427,6 +1739,16 @@ sub format_filenames { } return ''; } +# ----------------------------------------------- Format specialnotices section +sub format_specialnotices { + $parser->get_tag('/specialnotices'); + return ''; +} +# ------------------------------------------------ Format specialnotice section +sub format_specialnotice { + $parser->get_tag('/specialnotice'); + return ''; +} # ------------------------------------------------------- Format linkto section sub format_linkto { my @tokeninfo=@_; @@ -1451,14 +1773,17 @@ sub trim { # ----------------------------------- POD (plain old documentation, CPAN style) +=pod + =head1 NAME lpml_parse.pl - This is meant to parse files meeting the lpml document type. -See lpml.dtd. LPML=Linux Packaging Markup Language. =head1 SYNOPSIS -Usage is for lpml file to come in through standard input. + | perl lpml_parse.pl + +Usage is for the lpml file to come in through standard input. =over 4 @@ -1490,19 +1815,57 @@ Only the 1st argument is mandatory for t Example: cat ../../doc/loncapafiles.lpml |\\ -perl lpml_parse.pl html default /home/sherbert/loncapa /tmp/install +perl lpml_parse.pl html runtime default /home/sherbert/loncapa /tmp/install =head1 DESCRIPTION -I am using a multiple pass-through approach to parsing -the lpml file. This saves memory and makes sure the server -will never be overloaded. +The general flow of the script is to get command line arguments, run through +the XML document three times, and output according to any desired mode: +install, configinstall, build, rpm, dpkg, htmldoc, textdoc, and status. + +A number of coding decisions are made according to the following principle: +installation software must be stand-alone. Therefore, for instance, I try +not to use the GetOpt::Long module or any other perl modules. (I do however +use HTML::TokeParser.) I also have tried to keep all the MODES of +parsing inside this file. Therefore, format_TAG subroutines are fairly +lengthy with their conditional logic. A more "elegant" solution might +be to dynamically register the parsing mode and subroutines, or maybe even work +with stylesheets. However, in order to make this the installation back-bone +of choice, there are advantages for HAVING EVERYTHING IN ONE FILE. +This way, the LPML installation software does not have to rely on OTHER +installation software (a chicken versus the egg problem). Besides, I would +suggest the modes of parsing are fairly constant: install, configinstall, +build, rpm, dpkg, htmldoc, textdoc, and status. + +Another coding decision is about using a multiple pass-through approach to +parsing the lpml file. This saves memory and makes sure the server will never +be overloaded. During the first pass-through, the script gathers information +specific as to resolving what tags with what 'dist=' attributes are to be used. +During the second pass-through, the script cleans up white-space surrounding +the XML tags, and filters through the tags based on information regarding the +'dist=' attributes (information gathered in the first pass-through). +The third and final pass-through involves formatting and rendering the XML +into whatever XML mode is chosen: install, configinstall, build, rpm, dpkg, +htmldoc, textdoc, and status. + +The hierarchy mandated by the DTD does not always correspond to the hierarchy +that is sensible for a Makefile. For instance, in a Makefile it is sensible +that soft-links are installed after files. However, in an LPML document, it +is sensible that files and links be considered together and the writer of the +LPML document should be free to place things in whatever order makes best +sense in terms of LOOKING at the information. The complication that arises +is that the parser needs to have a memory for passing values from +leaves on the XML tree to higher-up branches. Currently, this memory is +hard-coded (like with the @links array), but it may benefit from a more +formal approach in the future. =head1 README -I am using a multiple pass-through approach to parsing -the lpml file. This saves memory and makes sure the server -will never be overloaded. +This parses an LPML file to generate information useful for +source to target installation, compilation, filesystem status +checking, RPM and Debian software packaging, and documentation. + +More information on LPML is available at http://lpml.sourceforge.net. =head1 PREREQUISITES @@ -1516,6 +1879,14 @@ linux =head1 SCRIPT CATEGORIES -Packaging/Administrative +UNIX/System_administration + +=head1 AUTHOR + + Scott Harrison + codeharrison@yahoo.com + +Please let me know how/if you are finding this script useful and +any/all suggestions. -Scott =cut