[exim-cvs] Remove file name extensions from build scripts

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Autore: Exim Git Commits Mailing List
Data:  
To: exim-cvs
Oggetto: [exim-cvs] Remove file name extensions from build scripts
Gitweb: https://git.exim.org/exim-website.git/commitdiff/9d0f50e12e32b7cf6732e7f2924f3ce290933e43
Commit:     9d0f50e12e32b7cf6732e7f2924f3ce290933e43
Parent:     1b371428def1d35dcad9d6f4257356917c14a637
Author:     Heiko Schlittermann (HS12-RIPE) <hs@???>
AuthorDate: Sat Feb 10 22:42:44 2018 +0100
Committer:  Heiko Schlittermann (HS12-RIPE) <hs@???>
CommitDate: Sat Dec 1 22:46:36 2018 +0100


    Remove file name extensions from build scripts


    For compatibilty maintain the old names by symlinks
---
 README                                   |  14 +-
 script/build                             |  12 +
 script/build.sh                          |  14 +-
 script/{eximhtml2txt.pl => eximhtml2txt} |   0
 script/{gen.pl => gen}                   |   0
 script/gen.pl                            | 612 +------------------------------
 6 files changed, 21 insertions(+), 631 deletions(-)


diff --git a/README b/README
index 569a7da..f2c5e22 100644
--- a/README
+++ b/README
@@ -8,7 +8,7 @@ Directory : templates/i     - required images
 Directory : templates/howto - Howto documentation source
 File      : templates/wrapper.xsl   - The HTML wrapper. The stuff that's common across all web pages


-script/gen.pl does all the magic. Run it with no arguments to get a
+script/gen does all the magic. Run it with no arguments to get a
list of options. It takes the stylesheets wrapper.xsl, and those
inside the "web" and "doc" directories and creates a website from
them. You also tell it where to find spec.xml and filter.xml and it
@@ -17,7 +17,7 @@ examples:

## Example 1:

- script/gen.pl --latest 4.72 --web --tmpl templates --docroot /var/www/
+ script/gen --latest 4.72 --web --tmpl templates --docroot /var/www/

This copies all of the files from the "templates/web" directory
into "/var/www/". When it comes across .xsl files, it generates
@@ -27,7 +27,7 @@ it's ignored.

## Example 2:

-  script/gen.pl --latest 4.72 --spec docbook/*/spec.xml \
+  script/gen --latest 4.72 --spec docbook/*/spec.xml \
     --tmpl templates --docroot /var/www/


If there are multiple spec.xml files in "specs/*/" for different
@@ -37,11 +37,11 @@ contains the version number it's self, so it uses that in $VERSION

## Example 3:

- script/build.sh /var/www/
+ script/build /var/www/

Generates everything into output directory /var/www
-Look at the script/build.sh for details - it is just a wrapper
-around build/gen.pl
+Look at the script/build for details - it is just a wrapper
+around script/gen


All of the above examples make sure the exim-html-current symlink
@@ -56,7 +56,7 @@ If you wanted to, for example, add a new link to the navigation bar
on all pages, you would need to re-generate *all* web pages. This
is a drawback of having a static website without frames. You would
only need to edit one file though, specifically wrapper.xsl. Once
-that is done, you would run gen.pl with --web, --spec and --filter,
+that is done, you would run gen with --web, --spec and --filter,
providing the filter.xml and spec.xml files for every piece of
online documentation.

diff --git a/script/build b/script/build
new file mode 100755
index 0000000..56b8f1f
--- /dev/null
+++ b/script/build
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+TARGET=${1:-/srv/www/vhosts/www.exim.org}
+LATEST=`(cd docbook; ls -1dv [0-9].[0-9]* | tail -1)`
+
+script/gen \
+  --web \
+  --spec docbook/*/spec.xml \
+  --filter  docbook/*/filter.xml \
+  --tmpl templates \
+  --latest "$LATEST" \
+  --docroot "$TARGET"
diff --git a/script/build.sh b/script/build.sh
deleted file mode 100755
index 408b0d4..0000000
--- a/script/build.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/sh
-
-TARGET=${1-/srv/www/vhosts/www.exim.org}
-LATEST=`(cd docbook; ls -1d [0-9].[0-9]* | tail -1)`
-
-set -x
-script/gen.pl \
-  --web \
-  --spec docbook/*/spec.xml \
-  --filter  docbook/*/filter.xml \
-  --latest ${LATEST} \
-  --tmpl templates \
-  --docroot ${TARGET}
diff --git a/script/build.sh b/script/build.sh
new file mode 120000
index 0000000..c795b05
--- /dev/null
+++ b/script/build.sh
@@ -0,0 +1 @@
+build
\ No newline at end of file
diff --git a/script/eximhtml2txt.pl b/script/eximhtml2txt
similarity index 100%
rename from script/eximhtml2txt.pl
rename to script/eximhtml2txt
diff --git a/script/gen.pl b/script/gen
similarity index 100%
copy from script/gen.pl
copy to script/gen
diff --git a/script/gen.pl b/script/gen.pl
deleted file mode 100755
index dfb174e..0000000
--- a/script/gen.pl
+++ /dev/null
@@ -1,611 +0,0 @@
-#!/usr/bin/env perl
-#
-use strict;
-use warnings;
-
-use CSS::Minifier::XS 0.07;
-use File::Basename;
-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 Pod::Usage;
-use XML::LibXML;
-use XML::LibXSLT;
-
-my $canonical_url = 'https://www.exim.org/';
-
-## Parse arguments
-my %opt = parse_arguments();
-
-## setup static root location
-## TODO: for doc generation only this should be within the docs dir
-$opt{staticroot} = File::Spec->catdir( $opt{docroot}, 'static' );
-
-## Generate the pages
-my %cache;    # General cache object
-do_doc( 'spec',   $_ ) foreach @{ $opt{spec}   || [] };
-do_doc( 'filter', $_ ) foreach @{ $opt{filter} || [] };
-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
-foreach my $type (qw(html pdf)) {
-    print "Symlinking exim-$type-current to exim-$type-$opt{latest}\n" if ( $opt{verbose} );
-    unlink("$opt{docroot}/exim-$type-current");
-    symlink( "exim-$type-$opt{latest}", "$opt{docroot}/exim-$type-current" )
-        || warn "symlink to $opt{docroot}/exim-$type-current failed";
-}
-
-# ------------------------------------------------------------------
-## 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
-    die "No such directory: $source\n" unless ( -d $source );
-
-    ## Scan the web templates
-    find(
-        sub {
-            my ($path) = substr( $File::Find::name, length("$source"), length($File::Find::name) ) =~ m#^/*(.*)$#;
-
-            if ( -d "$source/$path" ) {
-
-                ## 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: $!\n";
-                }
-
-            }
-            else {
-
-                ## Build HTML from XSL files and simply copy static files which have changed
-                if ( ( !$static ) and ( $path =~ /(.+)\.xsl$/ ) ) {
-                    print "Generating  : /$1.html\n" if ( $opt{verbose} );
-                    transform( undef, "$source/$path", "$target/$1.html" );
-                }
-                elsif ( -f "$source/$path" ) {
-
-                    ## Skip if the file hasn't changed (mtime/size based)
-                    return
-                        if (( -f "$target/$path" )
-                        and ( ( stat("$source/$path") )[9] == ( stat("$target/$path") )[9] )
-                        and ( ( stat("$source/$path") )[7] == ( stat("$target/$path") )[7] ) );
-
-                    if ( $path =~ /(.+)\.css$/ ) {
-                        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 ( $path =~ /(.+)\.js$/ ) {
-                        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) : $content );
-                    }
-                    else {
-                        ## Copy
-                        print "Copying to  : /$path\n" if ( $opt{verbose} );
-                        copy( "$source/$path", "$target/$path" ) or die "$path: $!";
-                    }
-                    ## Set mtime
-                    utime( time, ( stat("$source/$path") )[9], "$target/$path" );
-                }
-            }
-
-        },
-        "$source"
-    );
-}
-
-# ------------------------------------------------------------------
-## Generate index/chapter files for a doc
-sub do_doc {
-    my ( $type, $xml_path ) = @_;
-
-    ## Read and validate the XML file
-    my $xml = XML::LibXML->new()->parse_file($xml_path) or die $!;
-
-    ## Get the version number
-    my $version = $xml->findvalue('/book/bookinfo/revhistory/revision/revnumber');
-    die "Unable to get version number\n" unless defined $version && $version =~ /^\d+(\.\d+)*$/;
-
-    ## Prepend chapter filenames?
-    my $prepend_chapter = $type eq 'filter' ? 'filter_' : '';
-
-    ## Add the canonical url for this document
-    $xml->documentElement()
-        ->appendTextChild( 'canonical_url',
-        "${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 );
-
-    ## 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' ? $type : 'index' ) . ".html";
-        print "Generating  : docroot:/$path\n" if ( $opt{verbose} );
-        transform( $xml, "$opt{tmpl}/doc/index.xsl", "$opt{docroot}/$path", $staticroot );
-    }
-
-    ## Generate a Table of Contents XML file
-    {
-        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;
-    my @chapters = map { $_->cloneNode(1) } $xml->findnodes('/book/chapter');
-    my( $chapter_title, $chapter_title_prev, $chapter_title_next );
-    foreach my $chapter (@chapters) {
-
-        ## Add a <chapter_id>N</chapter_id> node for the stylesheet to use
-        $chapter->appendTextChild( 'chapter_id', ++$counter );
-
-        ## Get the current and surrounding chapter titles
-        $chapter_title_prev = $chapter_title;
-        $chapter_title      = $chapter_title_next || $chapter->findvalue('title_uri');
-        $chapter_title_next = $chapters[$counter]->findvalue('title_uri') if $counter < int(@chapters);
-
-        ## Add previous/next/canonical urls for nav
-        {
-            $chapter->appendTextChild( 'prev_url',
-                  $counter == 1
-                ? $type eq 'filter'
-                        ? 'filter.html'
-                        : 'index.html'
-                : sprintf( '%sch-%s.html', $prepend_chapter, $chapter_title_prev ) );
-            $chapter->appendTextChild( 'this_url', sprintf( '%sch-%s.html', $prepend_chapter, $chapter_title ) );
-            $chapter->appendTextChild( 'next_url', sprintf( '%sch-%s.html', $prepend_chapter, $chapter_title_next ) )
-                unless int(@chapters) == $counter;
-            $chapter->appendTextChild( 'toc_url', ( $type eq 'filter' ? 'filter' : 'index' ) . '.html' );
-            $chapter->appendTextChild(
-                'canonical_url',
-                sprintf(
-                    'https://www.exim.org/exim-html-current/doc/html/spec_html/%sch-%s.html',
-                    $prepend_chapter, $chapter_title
-                )
-            );
-            if ( $version ne $opt{latest} ) {
-                $chapter->appendTextChild(
-                    'current_url',
-                    sprintf(
-                        '../../../../exim-html-current/doc/html/spec_html/%sch-%s.html',
-                        $prepend_chapter, $chapter_title
-                    )
-                );
-            }
-        }
-
-        ## Create an XML document from the chapter
-        my $doc = XML::LibXML::Document->createDocument( '1.0', 'UTF-8' );
-        $doc->setDocumentElement($chapter);
-
-        ## Transform the chapter into html
-        {
-            my $real_path = sprintf( 'exim-html-%s/doc/html/spec_html/%sch-%s.html', $version, $prepend_chapter, $chapter_title );
-            my $link_path = sprintf( 'exim-html-%s/doc/html/spec_html/%sch%02d.html',  $version, $prepend_chapter, $counter );
-            print "Generating  : docroot:/$real_path\n" if ( $opt{verbose} );
-            transform( $doc, "$opt{tmpl}/doc/chapter.xsl", "$opt{docroot}/$real_path", $staticroot );
-            # Making a relative symlink to a file in the same directory.
-            # Extract just the filename portion of $real_path.
-            my $real_file = basename($real_path);
-            print "Symlinking  : docroot:/$link_path to $real_file\n" if ( $opt{verbose} );
-            if ( -f "$opt{docroot}/$link_path" ) {
-               unlink("$opt{docroot}/$link_path") or die "failed removing $opt{docroot}/$link_path: $!";
-            }
-            symlink( "$real_file", "$opt{docroot}/$link_path" ) || die "symlink to $opt{docroot}/$link_path failed: $!";
-        }
-    }
-}
-
-# ------------------------------------------------------------------
-## Fixup xref tags
-sub xref_fixup {
-    my ( $xml, $prepend_chapter ) = @_;
-
-    my %index = ();
-
-    ## Add the "prepend_chapter" info
-    ( $xml->findnodes('/book') )[0]->appendTextChild( 'prepend_chapter', $prepend_chapter );
-
-    ## Iterate over each chapter
-    my $chapter_counter = 0;
-    foreach my $chapter ( $xml->findnodes('/book/chapter') ) {
-        ++$chapter_counter;
-
-        my $chapter_id = $chapter->getAttribute('id');
-        unless ($chapter_id) {    # synthesise missing id
-            $chapter_id = sprintf( 'chapter_noid_%04d', $chapter_counter );
-            $chapter->setAttribute( 'id', $chapter_id );
-        }
-        my $chapter_title = $chapter->findvalue('title');
-
-        ## Set title_uri so we can use eg ch-introduction.html instead of ch01.html
-        $chapter->appendTextChild( 'title_uri', title_to_uri($chapter_title) );
-
-        $index{$chapter_id} = { chapter_id => $chapter_counter, chapter_title => $chapter_title };
-
-        ## Iterate over each section
-        my $section_counter = 0;
-        foreach my $section ( $chapter->findnodes('section') ) {
-            ++$section_counter;
-
-            my $section_id = $section->getAttribute('id');
-            unless ($section_id) {    # synthesise missing id
-                $section_id = sprintf( 'section_noid_%04d_%04d', $chapter_counter, $section_counter );
-                $section->setAttribute( 'id', $section_id );
-            }
-            my $section_title = $section->findvalue('title');
-
-            $index{$section_id} = {
-                chapter_id    => $chapter_counter,
-                chapter_title => $chapter_title,
-                section_id    => $section_counter,
-                section_title => $section_title
-            };
-        }
-    }
-    ## Build indexes as new chapters
-    build_indexes( $xml, $prepend_chapter, \%index );
-
-    ## Replace all of the xrefs in the XML
-    foreach my $xref ( $xml->findnodes('//xref') ) {
-        my $linkend = $xref->getAttribute('linkend');
-        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( 'url',
-                sprintf( '%sch-%s.html', $prepend_chapter, title_to_uri($index{$linkend}{'chapter_title'}) )
-                    . ( $index{$linkend}{'section_id'} ? '#' . $linkend : '' ) );
-        }
-    }
-}
-
-# ------------------------------------------------------------------
-## Build indexes
-sub build_indexes {
-    my ( $xml, $prepend_chapter, $xref ) = @_;
-
-    my $index_hash = {};
-    my $current_id;
-    foreach my $node ( $xml->findnodes('//section | //chapter | //indexterm') ) {
-        if ( $node->nodeName eq 'indexterm' ) {
-            my $role      = $node->getAttribute('role') || 'concept';
-            my $primary   = $node->findvalue('child::primary');
-            my $first     = ( $primary =~ /^[A-Za-z]/ ) ? uc( substr( $primary, 0, 1 ) ) : '';  # first letter or marker
-            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;
-        }
-        else {
-            $current_id = $node->getAttribute('id');
-        }
-    }
-
-    # now we build a set of new chapters with the index data in
-    my $book = ( $xml->findnodes('/book') )[0];
-    foreach my $role ( sort { $a cmp $b } keys %{$index_hash} ) {
-        my $chapter = XML::LibXML::Element->new('chapter');
-        $book->appendChild($chapter);
-        $chapter->setAttribute( 'id', join( '_', 'index', $role ) );
-        $chapter->setAttribute( 'class', 'index' );
-        $chapter->appendTextChild( 'title', ( ucfirst($role) . ' Index' ) );
-        $chapter->appendTextChild( 'title_uri', title_to_uri(ucfirst($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('variablelist');
-            $chapter->appendChild($section);
-            $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} } ) {
-                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 $para = XML::LibXML::Element->new('para');
-                    if ( $secondary eq '' ) {
-                        $item->appendChild($para);    # skip having extra layer of heirarchy
-                    }
-                    else {
-                        unless ($slist) {
-                            $slist = XML::LibXML::Element->new('variablelist');
-                            $item->appendChild($slist);
-                        }
-                        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);
-                    }
-                    my $count = 0;
-                    foreach my $ref ( @{ $index_hash->{$role}{$first}{$primary}{$secondary} } ) {
-                        $para->appendText(', ')
-                            if ( $count++ );
-                        my $xrefel = XML::LibXML::Element->new('xref');
-                        $xrefel->setAttribute( linkend => $ref );
-                        $xrefel->setAttribute( longref => 1 );
-                        $para->appendChild($xrefel);
-                    }
-                }
-            }
-        }
-    }
-}
-
-# ------------------------------------------------------------------
-## Handle the transformation
-sub transform {
-    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 ) {
-        $xml = XML::LibXML::Document->createDocument( '1.0', 'UTF-8' );
-        $xml->setDocumentElement( $xml->createElement('content') );
-    }
-
-    ## 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);
-
-    ## 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
-    my $doc = $stylesheet->transform( $xml, staticroot => sprintf( "'%s'", $staticroot ) );
-
-    ## Make the containing directory if it doesn't exist
-    make_path( ( $out_path =~ /^(.+)\/.+$/ )[0], { verbose => $opt{verbose} } );
-
-    ## Write out the document
-    open my $out, '>', $out_path or die "Unable to write $out_path - $!";
-    print $out $stylesheet->output_as_bytes($doc);
-    close $out;
-}
-
-# ------------------------------------------------------------------
-## Takes a chapter title and fixes it up so it is suitable for use in a URI
-sub title_to_uri {
-    my $title = lc(shift);
-    $title =~ s/[^a-z0-9\s]+//gi; # Only allow spaces, numbers and letters
-    $title =~ s/\s+/_/g;          # Replace spaces with underscores so URLs are easier to copy about
-    return $title;
-}
-
-# ------------------------------------------------------------------
-## 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 lt $opt{latest} && -d $_;
-        }
-        $cache{old_docs_versions} = [ reverse sort { $a cmp $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 {
-
-    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
-    pod2usage(0) if ( $opt{help} );
-    pod2usage( -verbose => 2 ) if ( $opt{man} );
-
-    ## --spec and --filter lists
-    foreach my $set (qw[spec filter]) {
-        $opt{$set} =
-            [ map { my $f = File::Spec->rel2abs($_); error_help( 'No such file: ' . $_ ) unless -f $f; $f }
-                @{ $opt{$set} } ];
-    }
-    ## --latest
-    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]) {
-        error_help( 'Missing value for ' . $set ) unless ( exists( $opt{$set} ) && defined( $opt{$set} ) );
-        my $f = File::Spec->rel2abs( $opt{$set} );
-        error_help( 'No such directory: ' . $opt{$set} ) unless -d $f;
-        $opt{$set} = $f;
-    }
-    error_help('Excess arguments') if ( scalar(@ARGV) );
-
-    error_help('Must include at least one of --web, --spec or --filter')
-        unless ( $opt{web} || scalar( @{ $opt{spec} || [] } ) || scalar( @{ $opt{filter} || [] } ) );
-
-    return %opt;
-}
-
-# ------------------------------------------------------------------
-1;
-
-__END__
-
-=head1 NAME
-
-gen.pl - Generate exim html documentation and website
-
-=head1 SYNOPSIS
-
-gen.pl [options]
-
- 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
-
-=head1 OPTIONS
-
-=over 4
-
-=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@???> - mostly broke the framework Mike produced.
-
-=head1 COPYRIGHT
-
-Copyright 2010-2012 Exim Maintainers. All rights reserved.
-
-=cut
diff --git a/script/gen.pl b/script/gen.pl
new file mode 120000
index 0000000..9eedfe1
--- /dev/null
+++ b/script/gen.pl
@@ -0,0 +1 @@
+gen
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