Added local static file option for documentation generation

[exim-website.git] / script / gen.pl

diff --git a/script/gen.pl b/script/gen.pl
index 7bc1309cc995301d526b8eede24416561307aa4e..c223db584be1b62d3fa6d7dab02fbd54759ac90f 100755 (executable)
--- a/script/gen.pl
+++ b/script/gen.pl
@@ -1,13 +1,17 @@
-#!/usr/bin/perl
+#!/usr/bin/env perl
+#

 use strict;
 use warnings;
 use strict;
 use warnings;

-use CSS::Minifier::XS;
+
+use CSS::Minifier::XS 0.07;

 use File::Copy;
 use File::Find;
 use File::Copy;
 use File::Find;

+use File::Path qw(make_path);

 use File::Slurp;
 use File::Spec;
 use Getopt::Long;
 use JavaScript::Minifier::XS;
 use File::Slurp;
 use File::Spec;
 use Getopt::Long;
 use JavaScript::Minifier::XS;

+use Pod::Usage;

 use XML::LibXML;
 use XML::LibXSLT;
 
 use XML::LibXML;
 use XML::LibXSLT;
 


@@ -16,71 +20,108 @@ my $canonical_url = 'http://www.exim.org/';
 ## Parse arguments
 my %opt = parse_arguments();
 
 ## Parse arguments
 my %opt = parse_arguments();
 

+## setup static root location
+## TODO: for doc generation only this should be within the docs dir
+$opt{staticroot} = File::Spec->catdir( $opt{docroot}, 'static' );
+

 ## Generate the pages
 ## Generate the pages

+my %cache;    # General cache object

 do_doc( 'spec',   $_ ) foreach @{ $opt{spec}   || [] };
 do_doc( 'filter', $_ ) foreach @{ $opt{filter} || [] };
 do_doc( 'spec',   $_ ) foreach @{ $opt{spec}   || [] };
 do_doc( 'filter', $_ ) foreach @{ $opt{filter} || [] };

-do_web() if exists $opt{web};
+do_web() if ( $opt{web} );
+do_static() if ( $opt{web} or !$opt{localstatic} );    # need this for all other pages generated

 
 ## Add the exim-html-current symlink
 
 ## Add the exim-html-current symlink

-print "Symlinking exim-html-current to exim-html-$opt{latest}\n";
-symlink( "$opt{docroot}/exim-html-$opt{latest}", "$opt{docroot}/exim-html-current" );
+print "Symlinking exim-html-current to exim-html-$opt{latest}\n" if ( $opt{verbose} );
+unlink("$opt{docroot}/exim-html-current") if ( -l "$opt{docroot}/exim-html-current" );
+symlink( "exim-html-$opt{latest}", "$opt{docroot}/exim-html-current" )
+    || die "symlink to $opt{docroot}/exim-html-current failed";

 
 

+# ------------------------------------------------------------------

 ## Generate the website files
 sub do_web {
 
 ## Generate the website files
 sub do_web {
 

+    ## copy these templates to docroot...
+    copy_transform_files( "$opt{tmpl}/web", $opt{docroot}, 0 );
+}
+
+# ------------------------------------------------------------------
+## Generate the static file set
+sub do_static {
+    my $staticroot = shift || $opt{staticroot};
+
+    ## make sure I have a directory
+    mkdir($staticroot) or die "Unable to make staticroot: $!\n" unless ( -d $staticroot );
+
+    ## copy these templates to docroot...
+    copy_transform_files( "$opt{tmpl}/static", $staticroot, 1 );
+}
+
+# ------------------------------------------------------------------
+## Generate the website files
+sub copy_transform_files {
+    my $source = shift;
+    my $target = shift;
+    my $static = shift;
+

     ## Make sure the template web directory exists
     ## Make sure the template web directory exists

-    die "No such directory: $opt{tmpl}/web\n" unless -d "$opt{tmpl}/web";
+    die "No such directory: $source\n" unless ( -d $source );

 
     ## Scan the web templates
     find(
         sub {
 
     ## Scan the web templates
     find(
         sub {

-            my ($path) = substr( $File::Find::name, length("$opt{tmpl}/web"), length($File::Find::name) ) =~ m#^/*(.*)$#;
+            my ($path) = substr( $File::Find::name, length("$source"), length($File::Find::name) ) =~ m#^/*(.*)$#;

 
 

-            if ( -d "$opt{tmpl}/web/$path" ) {
+            if ( -d "$source/$path" ) {

 
 

-                ## Create the directory in the doc root if it doesn't exist
-                if ( !-d "$opt{docroot}/$path" ) {
-                    mkdir("$opt{docroot}/$path") or die "Unable to make $opt{docroot}/$path: $!\n";
+                ## Create the directory in the target if it doesn't exist
+                if ( !-d "$target/$path" ) {
+                    mkdir("$target/$path") or die "Unable to make $target/$path: $!\n";

                 }
 
             }
             else {
 
                 ## Build HTML from XSL files and simply copy static files which have changed
                 }
 
             }
             else {
 
                 ## Build HTML from XSL files and simply copy static files which have changed

-                if ( $path =~ /(.+)\.xsl$/ ) {
-                    print "Generating  : docroot:/$1.html\n";
-                    transform( undef, "$opt{tmpl}/web/$path", "$opt{docroot}/$1.html" );
+                if ( ( !$static ) and ( $path =~ /(.+)\.xsl$/ ) ) {
+                    print "Generating  : /$1.html\n" if ( $opt{verbose} );
+                    transform( undef, "$source/$path", "$target/$1.html" );

                 }
                 }

-                elsif ( -f "$opt{tmpl}/web/$path" ) {
+                elsif ( -f "$source/$path" ) {

 
 

-                    ## Skip if the file hasn't changed (mtime based)
-                    return if -f "$opt{docroot}/$path" && ( stat("$opt{tmpl}/web/$path") )[9] == ( stat("$opt{docroot}/$path") )[9];
+                    ## Skip if the file hasn't changed (mtime/size based)
+                    return
+                        if (( -f "$target/$path" )
+                        and ( ( stat("$source/$path") )[9] == ( stat("$target/$path") )[9] )
+                        and ( ( stat("$source/$path") )[7] == ( stat("$target/$path") )[7] ) );

 
                     if ( $path =~ /(.+)\.css$/ ) {
 
                     if ( $path =~ /(.+)\.css$/ ) {

-                        print "CSS to  : docroot:/$path\n";
-                        my $content = read_file("$opt{tmpl}/web/$path");
-                        write_file( "$opt{docroot}/$path", $opt{minify} ? CSS::Minifier::XS::minify($content) : $content );
+                        print "CSS to  : /$path\n" if ( $opt{verbose} );
+                        my $content = read_file("$source/$path");
+                        write_file( "$target/$path", $opt{minify} ? CSS::Minifier::XS::minify($content) : $content );

                     }
                     elsif ( $path =~ /(.+)\.js$/ ) {
                     }
                     elsif ( $path =~ /(.+)\.js$/ ) {

-                        print "JS to  : docroot:/$path\n";
-                        my $content = read_file("$opt{tmpl}/web/$path");
-                        write_file( "$opt{docroot}/$path", $opt{minify} ? JavaScript::Minifier::XS::minify($content) : $content );
+                        print "JS to  : /$path\n" if ( $opt{verbose} );
+                        my $content = read_file("$source/$path");
+                        write_file( "$target/$path",
+                            $opt{minify} ? JavaScript::Minifier::XS::minify($content) : $content );

                     }
                     else {
                         ## Copy
                     }
                     else {
                         ## Copy

-                        print "Copying to  : docroot:/$path\n";
-                        copy( "$opt{tmpl}/web/$path", "$opt{docroot}/$path" ) or die "$path: $!";
+                        print "Copying to  : /$path\n" if ( $opt{verbose} );
+                        copy( "$source/$path", "$target/$path" ) or die "$path: $!";

                     }
                     ## Set mtime
                     }
                     ## Set mtime

-                    utime( time, ( stat("$opt{tmpl}/web/$path") )[9], "$opt{docroot}/$path" );
+                    utime( time, ( stat("$source/$path") )[9], "$target/$path" );

                 }
             }
 
         },
                 }
             }
 
         },

-        "$opt{tmpl}/web"
+        "$source"

     );
 }
 
     );
 }
 

+# ------------------------------------------------------------------

 ## Generate index/chapter files for a doc
 sub do_doc {
     my ( $type, $xml_path ) = @_;
 ## Generate index/chapter files for a doc
 sub do_doc {
     my ( $type, $xml_path ) = @_;


@@ -97,29 +138,48 @@ sub do_doc {
 
     ## Add the canonical url for this document
     $xml->documentElement()
 
     ## Add the canonical url for this document
     $xml->documentElement()

-      ->appendTextChild( 'canonical_url',
+        ->appendTextChild( 'canonical_url',

         "${canonical_url}exim-html-current/doc/html/spec_html/" . ( $type eq 'spec' ? 'index' : 'filter' ) . ".html" );
 
         "${canonical_url}exim-html-current/doc/html/spec_html/" . ( $type eq 'spec' ? 'index' : 'filter' ) . ".html" );
 

+    ## Add a url for the latest version of this document
+    if ( $version ne $opt{latest} ) {
+        $xml->documentElement()
+            ->appendTextChild( 'current_url',
+            "../../../../exim-html-current/doc/html/spec_html/" . ( $type eq 'spec' ? 'index' : 'filter' ) . ".html" );
+    }
+

     ## Fixup the XML
     xref_fixup( $xml, $prepend_chapter );
 
     ## Fixup the XML
     xref_fixup( $xml, $prepend_chapter );
 

+    ## set the staticroot
+    my $staticroot =
+        $opt{localstatic}
+        ? File::Spec->catdir( $opt{docroot}, "exim-html-$version", 'doc', 'html', 'static' )
+        : $opt{staticroot};
+    unless ( -d $staticroot ) {
+        make_path( $staticroot, { verbose => $opt{verbose} } );
+        do_static($staticroot);
+    }
+

     ## Generate the front page
     {
         my $path = "exim-html-$version/doc/html/spec_html/" . ( $type eq 'filter' ? $type : 'index' ) . ".html";
     ## Generate the front page
     {
         my $path = "exim-html-$version/doc/html/spec_html/" . ( $type eq 'filter' ? $type : 'index' ) . ".html";

-        print "Generating  : docroot:/$path\n";
-        transform( $xml, "$opt{tmpl}/doc/index.xsl", "$opt{docroot}/$path", );
+        print "Generating  : docroot:/$path\n" if ( $opt{verbose} );
+        transform( $xml, "$opt{tmpl}/doc/index.xsl", "$opt{docroot}/$path", $staticroot );

     }
 
     ## Generate a Table of Contents XML file
     {
     }
 
     ## Generate a Table of Contents XML file
     {

-        my $path = "exim-html-$version/doc/html/spec_html/" . ( $type eq 'filter' ? 'filter_toc' : 'index_toc' ) . ".xml";
-        print "Generating  : docroot:/$path\n";
-        transform( $xml, "$opt{tmpl}/doc/toc.xsl", "$opt{docroot}/$path", );
+        my $path =
+            "exim-html-$version/doc/html/spec_html/" . ( $type eq 'filter' ? 'filter_toc' : 'index_toc' ) . ".xml";
+        print "Generating  : docroot:/$path\n" if ( $opt{verbose} );
+        transform( $xml, "$opt{tmpl}/doc/toc.xsl", "$opt{docroot}/$path", $staticroot );

     }
 
     ## Generate the chapters
     my $counter = 0;
     }
 
     ## Generate the chapters
     my $counter = 0;

-    foreach my $chapter ( map { $_->cloneNode(1) } $xml->findnodes('/book/chapter') ) {
+    my @chapters = map { $_->cloneNode(1) } $xml->findnodes('/book/chapter');
+    foreach my $chapter (@chapters) {

 
         ## Add a <chapter_id>N</chapter_id> node for the stylesheet to use
         $chapter->appendTextChild( 'chapter_id', ++$counter );
 
         ## Add a <chapter_id>N</chapter_id> node for the stylesheet to use
         $chapter->appendTextChild( 'chapter_id', ++$counter );


@@ -129,12 +189,28 @@ sub do_doc {
             $chapter->appendTextChild( 'prev_url',
                   $counter == 1
                 ? $type eq 'filter'
             $chapter->appendTextChild( 'prev_url',
                   $counter == 1
                 ? $type eq 'filter'

-                      ? 'filter.html'
-                      : 'index.html'
+                        ? 'filter.html'
+                        : 'index.html'

                 : sprintf( '%sch%02d.html', $prepend_chapter, $counter - 1 ) );
                 : sprintf( '%sch%02d.html', $prepend_chapter, $counter - 1 ) );

-            $chapter->appendTextChild( 'next_url', sprintf( '%sch%02d.html', $prepend_chapter, $counter + 1 ) );
-            $chapter->appendTextChild( 'canonical_url',
-                sprintf( 'http://www.exim.org/exim-html-current/doc/html/spec_html/%sch%02d.html', $prepend_chapter, $counter ) );
+            $chapter->appendTextChild( 'next_url', sprintf( '%sch%02d.html', $prepend_chapter, $counter + 1 ) )
+                unless int(@chapters) == $counter;
+            $chapter->appendTextChild( 'toc_url', ( $type eq 'filter' ? 'filter' : 'index' ) . '.html' );
+            $chapter->appendTextChild(
+                'canonical_url',
+                sprintf(
+                    'http://www.exim.org/exim-html-current/doc/html/spec_html/%sch%02d.html',
+                    $prepend_chapter, $counter
+                )
+            );
+            if ( $version ne $opt{latest} ) {
+                $chapter->appendTextChild(
+                    'current_url',
+                    sprintf(
+                        '../../../../exim-html-current/doc/html/spec_html/%sch%02d.html',
+                        $prepend_chapter, $counter
+                    )
+                );
+            }

         }
 
         ## Create an XML document from the chapter
         }
 
         ## Create an XML document from the chapter


@@ -144,12 +220,13 @@ sub do_doc {
         ## Transform the chapter into html
         {
             my $path = sprintf( 'exim-html-%s/doc/html/spec_html/%sch%02d.html', $version, $prepend_chapter, $counter );
         ## Transform the chapter into html
         {
             my $path = sprintf( 'exim-html-%s/doc/html/spec_html/%sch%02d.html', $version, $prepend_chapter, $counter );

-            print "Generating  : docroot:/$path\n";
-            transform( $doc, "$opt{tmpl}/doc/chapter.xsl", "$opt{docroot}/$path", );
+            print "Generating  : docroot:/$path\n" if ( $opt{verbose} );
+            transform( $doc, "$opt{tmpl}/doc/chapter.xsl", "$opt{docroot}/$path", $staticroot );

         }
     }
 }
 
         }
     }
 }
 

+# ------------------------------------------------------------------

 ## Fixup xref tags
 sub xref_fixup {
     my ( $xml, $prepend_chapter ) = @_;
 ## Fixup xref tags
 sub xref_fixup {
     my ( $xml, $prepend_chapter ) = @_;


@@ -202,15 +279,17 @@ sub xref_fixup {
         if ( exists $index{$linkend} ) {
             $xref->setAttribute( 'chapter_id',    $index{$linkend}{'chapter_id'} );
             $xref->setAttribute( 'chapter_title', $index{$linkend}{'chapter_title'} );
         if ( exists $index{$linkend} ) {
             $xref->setAttribute( 'chapter_id',    $index{$linkend}{'chapter_id'} );
             $xref->setAttribute( 'chapter_title', $index{$linkend}{'chapter_title'} );

-            $xref->setAttribute( 'section_id',    $index{$linkend}{'section_id'} ) if ( $index{$linkend}{'section_id'} );
-            $xref->setAttribute( 'section_title', $index{$linkend}{'section_title'} ) if ( $index{$linkend}{'section_title'} );
+            $xref->setAttribute( 'section_id', $index{$linkend}{'section_id'} ) if ( $index{$linkend}{'section_id'} );
+            $xref->setAttribute( 'section_title', $index{$linkend}{'section_title'} )
+                if ( $index{$linkend}{'section_title'} );

             $xref->setAttribute( 'url',
                 sprintf( '%sch%02d.html', $prepend_chapter, $index{$linkend}{'chapter_id'} )
             $xref->setAttribute( 'url',
                 sprintf( '%sch%02d.html', $prepend_chapter, $index{$linkend}{'chapter_id'} )

-                  . ( $index{$linkend}{'section_id'} ? '#' . $linkend : '' ) );
+                    . ( $index{$linkend}{'section_id'} ? '#' . $linkend : '' ) );

         }
     }
 }
 
         }
     }
 }
 

+# ------------------------------------------------------------------

 ## Build indexes
 sub build_indexes {
     my ( $xml, $prepend_chapter, $xref ) = @_;
 ## Build indexes
 sub build_indexes {
     my ( $xml, $prepend_chapter, $xref ) = @_;


@@ -221,8 +300,9 @@ sub build_indexes {
         if ( $node->nodeName eq 'indexterm' ) {
             my $role      = $node->getAttribute('role') || 'concept';
             my $primary   = $node->findvalue('child::primary');
         if ( $node->nodeName eq 'indexterm' ) {
             my $role      = $node->getAttribute('role') || 'concept';
             my $primary   = $node->findvalue('child::primary');

-            my $first     = uc( substr( $primary, 0, 1 ) );               # first char
+            my $first     = ( $primary =~ /^[A-Za-z]/ ) ? uc( substr( $primary, 0, 1 ) ) : '';  # first letter or marker

             my $secondary = $node->findvalue('child::secondary') || '';
             my $secondary = $node->findvalue('child::secondary') || '';

+            next unless ( $primary || $secondary );    # skip blank entries for now...

             $index_hash->{$role}{$first}{$primary}{$secondary} ||= [];
             push @{ $index_hash->{$role}{$first}{$primary}{$secondary} }, $current_id;
         }
             $index_hash->{$role}{$first}{$primary}{$secondary} ||= [];
             push @{ $index_hash->{$role}{$first}{$primary}{$secondary} }, $current_id;
         }


@@ -236,48 +316,46 @@ sub build_indexes {
     foreach my $role ( sort { $a cmp $b } keys %{$index_hash} ) {
         my $chapter = XML::LibXML::Element->new('chapter');
         $book->appendChild($chapter);
     foreach my $role ( sort { $a cmp $b } keys %{$index_hash} ) {
         my $chapter = XML::LibXML::Element->new('chapter');
         $book->appendChild($chapter);

-        $chapter->setAttribute( 'id', 'index_' . $role );
+        $chapter->setAttribute( 'id', join( '_', 'index', $role ) );
+        $chapter->setAttribute( 'class', 'index' );

         $chapter->appendTextChild( 'title', ( ucfirst($role) . ' Index' ) );
         foreach my $first ( sort { $a cmp $b } keys %{ $index_hash->{$role} } ) {
             my $section = XML::LibXML::Element->new('section');
         $chapter->appendTextChild( 'title', ( ucfirst($role) . ' Index' ) );
         foreach my $first ( sort { $a cmp $b } keys %{ $index_hash->{$role} } ) {
             my $section = XML::LibXML::Element->new('section');

-            my $list    = XML::LibXML::Element->new('itemizedlist');
+            my $list    = XML::LibXML::Element->new('variablelist');

             $chapter->appendChild($section);
             $chapter->appendChild($section);

-            $section->setAttribute( 'id', 'index_' . $role . '_' . $first );
-            $section->appendTextChild( 'title', $first );
+            $section->setAttribute( 'id', join( '_', 'index', $role, $first ) );
+            $section->setAttribute( 'class', 'index' );
+            $section->appendTextChild( 'title', $first ? $first : 'Symbols' );

             $section->appendChild($list);
             foreach my $primary ( sort { $a cmp $b } keys %{ $index_hash->{$role}{$first} } ) {
             $section->appendChild($list);
             foreach my $primary ( sort { $a cmp $b } keys %{ $index_hash->{$role}{$first} } ) {

-                my $item = XML::LibXML::Element->new('listitem');
-                my $para = XML::LibXML::Element->new('para');
-                $list->appendChild($item);
-                $item->appendChild($para);
-                $para->appendText($primary);
+                my $entry = XML::LibXML::Element->new('varlistentry');
+                my $item  = XML::LibXML::Element->new('listitem');
+                $list->appendChild($entry)->appendTextChild( 'term', $primary );
+                $entry->appendChild($item);

                 my $slist;
                 foreach my $secondary ( sort { $a cmp $b } keys %{ $index_hash->{$role}{$first}{$primary} } ) {
                 my $slist;
                 foreach my $secondary ( sort { $a cmp $b } keys %{ $index_hash->{$role}{$first}{$primary} } ) {

-                    my $spara;
-                    my $sitem;
+                    my $para = XML::LibXML::Element->new('para');

                     if ( $secondary eq '' ) {
                     if ( $secondary eq '' ) {

-                        $spara = $para;    # skip having extra layer of heirarchy
+                        $item->appendChild($para);    # skip having extra layer of heirarchy

                     }
                     else {
                         unless ($slist) {
                     }
                     else {
                         unless ($slist) {

-                            $slist = XML::LibXML::Element->new('itemizedlist');
+                            $slist = XML::LibXML::Element->new('variablelist');

                             $item->appendChild($slist);
                         }
                             $item->appendChild($slist);
                         }

-                        $sitem = XML::LibXML::Element->new('listitem');
-                        $spara = XML::LibXML::Element->new('para');
-                        $slist->appendChild($sitem);
-                        $slist->appendChild($spara);
-                        $spara->appendText($secondary);
+                        my $sentry = XML::LibXML::Element->new('varlistentry');
+                        my $sitem  = XML::LibXML::Element->new('listitem');
+                        $slist->appendChild($sentry)->appendTextChild( 'term', $secondary );
+                        $sentry->appendChild($sitem)->appendChild($para);

                     }
                     }

-                    $spara->appendText(': ');

                     my $count = 0;
                     foreach my $ref ( @{ $index_hash->{$role}{$first}{$primary}{$secondary} } ) {
                     my $count = 0;
                     foreach my $ref ( @{ $index_hash->{$role}{$first}{$primary}{$secondary} } ) {

-                        $spara->appendText(', ')
-                          if ( $count++ );
+                        $para->appendText(', ')
+                            if ( $count++ );

                         my $xrefel = XML::LibXML::Element->new('xref');
                         $xrefel->setAttribute( linkend => $ref );
                         $xrefel->setAttribute( longref => 1 );
                         my $xrefel = XML::LibXML::Element->new('xref');
                         $xrefel->setAttribute( linkend => $ref );
                         $xrefel->setAttribute( longref => 1 );

-                        $spara->appendChild($xrefel);
+                        $para->appendChild($xrefel);

                     }
                 }
             }
                     }
                 }
             }


@@ -285,9 +363,13 @@ sub build_indexes {
     }
 }
 
     }
 }
 

+# ------------------------------------------------------------------

 ## Handle the transformation
 sub transform {
 ## Handle the transformation
 sub transform {

-    my ( $xml, $xsl_path, $out_path ) = @_;
+    my ( $xml, $xsl_path, $out_path, $staticroot_abs ) = @_;
+
+    ## make sure $staticroot is set
+    $staticroot_abs ||= $opt{staticroot};

 
     ## Build an empty XML structure if an undefined $xml was passed
     unless ( defined $xml ) {
 
     ## Build an empty XML structure if an undefined $xml was passed
     unless ( defined $xml ) {


@@ -298,105 +380,202 @@ sub transform {
     ## Add the current version of Exim to the XML
     $xml->documentElement()->appendTextChild( 'current_version', $opt{latest} );
 
     ## Add the current version of Exim to the XML
     $xml->documentElement()->appendTextChild( 'current_version', $opt{latest} );
 

+    ## Add the old versions of Exim to the XML
+    $xml->documentElement()->appendTextChild( 'old_versions', $_ ) foreach old_docs_versions();
+

     ## Parse the ".xsl" file as XML
     my $xsl = XML::LibXML->new()->parse_file($xsl_path) or die $!;
 
     ## Generate a stylesheet from the ".xsl" XML.
     my $stylesheet = XML::LibXSLT->new()->parse_stylesheet($xsl);
 
     ## Parse the ".xsl" file as XML
     my $xsl = XML::LibXML->new()->parse_file($xsl_path) or die $!;
 
     ## Generate a stylesheet from the ".xsl" XML.
     my $stylesheet = XML::LibXSLT->new()->parse_stylesheet($xsl);
 

+    ## work out the static root relative to the target
+    my $target_dir = ( File::Spec->splitpath($out_path) )[1];
+    my $staticroot = File::Spec->abs2rel( $staticroot_abs, $target_dir );
+

     ## Generate a doc from the XML transformed with the XSL
     ## Generate a doc from the XML transformed with the XSL

-    my $doc = $stylesheet->transform($xml);
+    my $doc = $stylesheet->transform( $xml, staticroot => sprintf( "'%s'", $staticroot ) );

 
     ## Make the containing directory if it doesn't exist
 
     ## Make the containing directory if it doesn't exist

-    mkdirp( ( $out_path =~ /^(.+)\/.+$/ )[0] );
+    make_path( ( $out_path =~ /^(.+)\/.+$/ )[0], { verbose => $opt{verbose} } );

 
     ## Write out the document
 
     ## Write out the document

-    open my $out, '>', $out_path or die $!;
+    open my $out, '>', $out_path or die "Unable to write $out_path - $!";

     print $out $stylesheet->output_as_bytes($doc);
     close $out;
 }
 
     print $out $stylesheet->output_as_bytes($doc);
     close $out;
 }
 

-## "mkdir -p "
-sub mkdirp {
-    my $path = shift;
-
-    my @parts = ();
-    foreach ( split( /\//, $path ) ) {
-        push @parts, $_;
-        my $make = join( '/', @parts );
-        next unless length($make);
-        next if -d $make;
-        mkdir($make) or die "Unable to mkdir $make: $!\n";
+# ------------------------------------------------------------------
+## Look in the docroot for old versions of the documentation
+sub old_docs_versions {
+    if ( !exists $cache{old_docs_versions} ) {
+        my @versions;
+        foreach ( glob("$opt{docroot}/exim-html-*") ) {
+            push @versions, $1 if /-(\d+(?:\.\d+)?)$/ && $1 < $opt{latest} && -d $_;
+        }
+        $cache{old_docs_versions} = [ reverse sort { $a <=> $b } @versions ];

     }
     }

+    return @{ $cache{old_docs_versions} };
+}
+
+# ------------------------------------------------------------------
+## error_help
+sub error_help {
+    my $msg = shift;
+
+    warn $msg;
+    pod2usage( -exitval => 1, -verbose => 0 );

 }
 
 }
 

+# ------------------------------------------------------------------

 ## Parse arguments
 sub parse_arguments {
 
 ## Parse arguments
 sub parse_arguments {
 

-    my %opt = ( spec => [], filter => [], help => 0, web => 0, minify => 1 );
-    GetOptions( \%opt, 'help|h!', 'web!', 'spec=s{1,}', 'filter=s{1,}', 'latest=s', 'tmpl=s', 'docroot=s', 'minify!' )
-      || help( 1, 'Bad options' );
+    my %opt = ( spec => [], filter => [], help => 0, man => 0, web => 0, minify => 1, verbose => 0, localstatic => 0 );
+    GetOptions(
+        \%opt,      'help|h!', 'man!',      'web!',    'spec=s{1,}', 'filter=s{1,}',
+        'latest=s', 'tmpl=s',  'docroot=s', 'minify!', 'verbose!',   'localstatic!'
+    ) || pod2usage( -exitval => 1, -verbose => 0 );

 
     ## --help
 
     ## --help

-    help(0) if ( $opt{help} );
+    pod2usage(0) if ( $opt{help} );
+    pod2usage( -verbose => 2 ) if ( $opt{man} );

 
     ## --spec and --filter lists
     foreach my $set (qw[spec filter]) {
 
     ## --spec and --filter lists
     foreach my $set (qw[spec filter]) {

-        $opt{$set} = [ map { my $f = File::Spec->rel2abs($_); help( 1, 'No such file: ' . $_ ) unless -f $f; $f } @{ $opt{$set} } ];
+        $opt{$set} =
+            [ map { my $f = File::Spec->rel2abs($_); error_help( 1, 'No such file: ' . $_ ) unless -f $f; $f }
+                @{ $opt{$set} } ];

     }
     ## --latest
     }
     ## --latest

-    help( 1, 'Missing value for latest' ) unless ( exists( $opt{latest} ) && defined( $opt{latest} ) );
-    help( 1, 'Invalid value for latest' ) unless $opt{latest} =~ /^\d+(?:\.\d+)*$/;
+    error_help('Missing value for latest') unless ( exists( $opt{latest} ) && defined( $opt{latest} ) );
+    error_help('Invalid value for latest') unless $opt{latest} =~ /^\d+(?:\.\d+)*$/;

 
     ## --tmpl and --docroot
     foreach my $set (qw[tmpl docroot]) {
 
     ## --tmpl and --docroot
     foreach my $set (qw[tmpl docroot]) {

-        help( 1, 'Missing value for ' . $set ) unless ( exists( $opt{$set} ) && defined( $opt{$set} ) );
+        error_help( 'Missing value for ' . $set ) unless ( exists( $opt{$set} ) && defined( $opt{$set} ) );

         my $f = File::Spec->rel2abs( $opt{$set} );
         my $f = File::Spec->rel2abs( $opt{$set} );

-        help( 1, 'No such directory: ' . $opt{$set} ) unless -d $f;
+        error_help( 'No such directory: ' . $opt{$set} ) unless -d $f;

         $opt{$set} = $f;
     }
         $opt{$set} = $f;
     }

-    help( 1, 'Excess arguments' ) if ( scalar(@ARGV) );
+    error_help('Excess arguments') if ( scalar(@ARGV) );

 
 

-    help( 1, 'Must include at least one of --web, --spec or --filter' )
-      unless ( defined $opt{web} || scalar( @{ $opt{spec} } ) || scalar( @{ $opt{web} } ) );
+    error_help('Must include at least one of --web, --spec or --filter')
+        unless ( $opt{web} || scalar( @{ $opt{spec} || [] } ) || scalar( @{ $opt{filter} || [] } ) );

 
     return %opt;
 }
 
 
     return %opt;
 }
 

-## Help information
-sub help {
-    my ( $exit_code, $msg ) = @_;
+# ------------------------------------------------------------------
+1;

 
 

-    print "$msg\n\n" if defined $msg;
+__END__

 
 

-    print << "END_HELP";
-Options:
-   --help or -h  : Print this help information and then exit
+=head1 NAME

 
 

-   --web         : Generate the general website pages
-   --spec PATH   : Generate the spec pages. PATH is the path to the spec.xml
-   --filter PATH : Generate the filter pages. PATH is the path to the filter.xml
+gen.pl - Generate exim html documentation and website

 
 

-   One or more of the above three options are required. --spec and --filter can
-   take multiple values to generate different sets of documentation for
-   different versions at the same time.
+=head1 SYNOPSIS

 
 

-   --latest VERSION : Required. Specify the latest stable version of Exim.
-   --tmpl PATH      : Required. Path to the templates directory
-   --docroot PATH   : Required. Path to the website document root
+gen.pl [options]

 
 

-   If CSS::Minifier::XS is installed, then CSS will be minified.
-   If JavaScript::Minifier::XS is installed, then JavaScript will be minified.
+ Options:
+   --help              display this help and exits
+   --man               displays man page
+   --spec file...      spec docbook/XML source files
+   --filter file...    filter docbook/XML source files
+   --web               Generate the general website pages
+   --latest VERSION    Required. Specify the latest stable version of Exim.
+   --tmpl PATH         Required. Path to the templates directory
+   --docroot PATH      Required. Path to the website document root
+   --[no-]minify       [Don't] minify CSS and Javascript
+   --localstatic       Makes the static files local to each doc ver 

 
 

-Example:
+=head1 OPTIONS

 
 

-   ./gen.pl --latest 4.72
-            --web
-            --spec spec.xml 4.71/spec.xml
-            --filter filter.xml 4.71/filter.xml
-            --tmpl ~/www/templates
-            --docroot ~/www/docroot
-END_HELP
+=over 4

 
 

-    exit($exit_code);
-}
+=item B<--help>
+
+Display help and exits
+
+=item B<--man>
+
+Display man page
+
+=item B<--spec> I<file...>
+
+List of files that make up the specification documentation
+docbook/XML source files.
+
+=item B<--filter> I<file...>
+
+List of files that make up the filter documentation docbook/XML
+source files.
+
+=item B<--web>
+
+Generate the website from the template files.
+
+=item B<--latest> I<version>
+
+Specify the current exim version. This is used to create links to
+the current documentation.
+
+This option is I<required>
+
+=item B<--tmpl> I<directory>
+
+Specify the directory that the templates are kept in.
+
+This option is I<required>
+
+=item B<--docroot> I<directory>
+
+Specify the directory that the output should be generated into.
+This is the website C<docroot> directory.
+
+This option is I<required>
+
+=item B<--minify>
+
+If this option is set then both the CSS and Javascript files
+processed are minified using L<CSS::Minifier::XS> and
+L<JavaScript::Minifier::XS> respectively.
+
+This option is set by default - to disable it specify C<--no-minify>
+
+=item B<--localstatic>
+
+Makes the static files (CSS, images etc), local for each version of
+the documentation. This is more suitable for packaged HTML
+documentation.
+
+=back
+
+=head1 DESCRIPTION
+
+Generates the exim website and HTML documentation.
+
+=head1 EXAMPLE
+
+    script/gen.pl \
+      --web \
+      --spec docbook/*/spec.xml \
+      --filter  docbook/*/filter.xml \
+      --latest 4.72 \
+      --tmpl templates \
+      --docroot /tmp/website
+
+=head1 AUTHOR
+
+Mike Cardwell
+
+Nigel Metheringham <nigel@exim.org> - mostly broke the framework
+Mike produced.
+
+=head1 COPYRIGHT
+
+Copyright 2010-2012 Exim Maintainers. All rights reserved.
+
+=cut