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ssgen.pl
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ssgen.pl
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#!/usr/bin/env perl
# ssgen - static site generator
# Uses Perl version 5.22.1
# Made by Anamitra Ghorui (https://github.com/daujerrene/)
# Copyright 2019 Anamitra Ghorui
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# 3. Neither the name of the copyright holder nor the names of its contributors
# may be used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Todo:
# Implement basedir
# dir="..."
#
# Usage:
# perl ssgen.pl -c [config file] (-V|--verbose)
# perl ssgen.pl [input file] [output file] [template]
#
#
# perl (-v|--version|-h|--help)
#
# ssgen can be used with a configuration file containing all the files and
# templates that need to be processed to make the site, or can be simply used
# as a program for automaticallly filling up a template with a given source
# document/file.
# ssgen can also automatically create directory listings of a certain directory,
# either by directly invoking a command or from a config file.
#
# Please see example.cfg for an example configuration file.
use strict;
use warnings;
use Data::Dumper;
use File::Copy;
use POSIX;
# Default Variables
# Cfg File Grammmar
my $sg_kvrgx = '^\s*(\w+)=\"([\w\\\.\/]+)\"\s*;?$'; # Key-Value Pairs
my $sg_blrgx = '^\s*(\"?[\w\\\.\/]+\"?)\s*:$'; # Block start
my $sg_listrgx = '^\s*[\"]?([\w\\\.\/]+)[\"]?\s*=>\s*[\"]?([\w\\\.\/]+)[\"]?\s*$'; # Block element
my $sg_listrgx1 = '^\s*[\"]?([\w\\\.\/])[\"]?\s*$'; # Block element (alternative)
my $sg_comrgx = '^\s*\#.*$'; # Comments
my $sg_wsrgx = '^\s*$'; # Whitespace
# Source File Grammar
my $sg_datargx = '^\#\#([A-Za-z]+):$'; # Normal data identifier (can be used for <body> etc.)
my $sg_datargx_d = '^\#\#\!$'; # Normal data identifier delimiter
my $sg_inlinergx = '^\#\#([A-Za-z]+)=(.*)$'; # Inline data identifier (can be used for <title>, <span> etc.)
# Template File Grammar
my $sg_srgx = '\{\{([\_\w\-]+)\}\}'; # Expression to be substituted
# Informational/"Internal" Variables
my $sg_i_version = "0.1.0 NotUsable";
my $sg_i_helpmsg = <<"!!ESTR";
ssgen - Static Site Generation Tool
Version: $sg_i_version
Usage:
\tperl ssgen.pl (-c [config file]|--version|--verbose|-v|-h|--help)
\tperl ssgen.pl [input file] [output file] [template]
Options:
\t-c [config file] : Run ssgen with a configuration file.
\t-V, --verbose : Display verbose output.
\t-v, --version : Display version.
\t-h, --help : Display this message
!!ESTR
my $sg_i_verbose = 0;
my @sg_resdir =
(
"",
"/usr/local/share/ssgen"
);
my %sg_vars = # Key-Value Variables
(
"root" => "./www/",
"src" => "./"
);
my %sg_mods = # Modifiers/"Special" functions
(
"copy" => 1,
"findex" => 1
);
# Variables for modifiers
my $sgm_trf = "<tr><td><a href=\"%s\">%s</a> </td><td>%s </td><td>%d </td></tr>"; # Table row (<tr>) format\
my $sgm_fdirindex = "t_dirindex.xhtml1.0t.html"; # Default directory index template
# Helper functions
sub sg_Alert
{
print @_ if ($sg_i_verbose);
}
sub sg_LoadFile # Load resource from predefined resource directories (see sg_resdir)
{
my ($mode, $path) = @_;
my $fh;
for(my $i = 0;($i < scalar(@sg_resdir)); ++$i)
{
return $fh if(open($fh, $mode, $sg_resdir[$i] . "/" . $path));
}
die("Error: could not load " . $path . " from predefined paths.\n") unless (defined $fh);
}
sub sg_Dircmp
{
if(-d $sg_vars{root} . $a->{name})
{
return -1;
}
elsif(-d $sg_vars{root} . $b->{name})
{
return 1;
}
else
{
return $a cmp $b;
}
}
# Generators
sub sg_GTemplate
{
my ($tfileh, $infileh, $table, $symbols, $outfileh) = @_;
my $tline;
my $sline;
while($tline = <$tfileh>)
{
if($tline =~ qr/$sg_srgx/)
{
if(exists $symbols->{data}->{$1})
{
seek($infileh, $table->[$symbols->{data}->{$1}]->{bpos}, 0);
print $outfileh substr($tline, 0, $-[0]);
for(my $i = 1; $i < ( $table->[$symbols->{data}->{$1} + 1]->{blpos}
- $table->[$symbols->{data}->{$1}]->{blpos});
$i++)
{
$sline = <$infileh>;
print $outfileh $sline;
}
print $outfileh substr($tline, $+[0]);
}
elsif(exists $symbols->{inline}->{$1})
{
print $outfileh substr($tline, 0, $-[0]);
print $outfileh $table->[$symbols->{inline}->{$1}]->{data};
print $outfileh substr($tline, $+[0]);
}
else
{
die("Error: Key $1 does not exist in input file.");
}
}
else
{
print $outfileh $tline;
}
}
seek($tfileh, 0, SEEK_SET);
}
sub sg_GCopy
{
my ($src, $dest) = @_;
copy($src, $dest) or die("Error: could not copy $src to $dest\n");
}
sub sg_GFindex
{
my ($dirn, $dirh, $outfileh, $tfileh) = @_;
my $tline;
my @si;
my $dirl;
for(my $i = 0; $tline = <$tfileh>; ++$i)
{
if($tline =~ qr/$sg_srgx/)
{
if($1 eq "SG_FILEPATH")
{
print $outfileh substr($tline, 0, $-[0]);
print $outfileh $dirn;
print $outfileh substr($tline, $+[0]);
}
elsif($1 eq "SG_ENTRIES")
{
while(readdir($dirh))
{
if($_ eq "." || $_ eq "index.html")
{
next;
}
elsif(-d $sg_vars{root} . $dirn . $_)
{
$dirl->[0]->[@{$dirl->[0]}] = $_ . "/";
}
else
{
$dirl->[1]->[@{$dirl->[1]}] = $_;
}
}
foreach my $i (@$dirl)
{
@$i = sort {$a cmp $b} @$i;
}
foreach my $i (@$dirl)
{
foreach my $j (@$i)
{
@si = stat($sg_vars{root} . $j);
printf $outfileh ($sgm_trf, $j, $j, strftime("%F, %T", gmtime($si[9])) . " GMT", $si[7]);
}
}
}
elsif($1 eq "SG_INFOMSG")
{
printf $outfileh substr($tline, 0, $-[0]);
printf $outfileh "ssgen v" . $sg_i_version;
printf $outfileh substr($tline, $+[0]);
}
else
{
die("Error at line $i: Key \'$1\' is not valid\n");
}
}
else
{
print $outfileh $tline;
}
}
seek($tfileh, 0, SEEK_SET);
}
#TODO: Possibly rework function
sub sg_ParseSrc
{
my ($fsrch,
$table, # Table of source block line and character positions
$symbols # Table consisting of respective symbols denoting blocks
) = @_;
my $k = 1;
my $line;
for($k = 1; $line = <$fsrch>; $k++)
{
if ($line =~ qr/$sg_datargx/)
{
$table->[@{$table}]->{bpos} = tell($fsrch);
$table->[@{$table} - 1]->{blpos} = $k;
$symbols->{data}->{$1} = @{$table} - 1;
}
elsif($line =~ qr/$sg_inlinergx/)
{
$table->[@{$table}]->{data} = $2;
$table->[@{$table} - 1]->{blpos} = $k;
$symbols->{inline}->{$1} = @{$table} - 1;
}
elsif($line =~ qr/$sg_datargx_d/)
{
$table->[@{$table}]->{blpos} = $k;
}
}
$table->[@{$table}]->{blpos} = $k;
seek($fsrch, 0, 0);
}
sub sg_ParseCfg
{
my ($fcfgh) = @_;
my $cb = ""; # Current Block
my $tmpl = 0; # Is current block a template block?
my %ftable; # File Table
my $line;
for(my $i = 1; $line = <$fcfgh>; ++$i)
{
if($line =~ qr/$sg_kvrgx/)
{
if(exists $sg_vars{$1})
{
$sg_vars{$1} = $2;
}
else
{
die("Error at line $i: Key \'$1\' is not valid\n");
}
}
elsif($line =~ qr/$sg_blrgx/)
{
$cb = $1;
if($1 =~ m/^"(.+)"$/)
{
$tmpl = 1;
$cb = $1;
}
else
{
if(exists $sg_mods{$cb})
{
$tmpl = 0;
}
else
{
die("Error at line $i: Illegal block name:\n$line\n");
}
}
}
elsif($line =~ qr/$sg_listrgx/)
{
if($cb eq "")
{
die("Error at line $i: Stray list item:\n$line\n");
}
if($tmpl)
{
$ftable{temp}{$cb}[@{$ftable{temp}{$cb}}] = [($1, $2)];
}
else
{
$ftable{$cb}[@{$ftable{$cb}}] = [($1, $2)];
}
}
elsif($line =~ qr/$sg_listrgx1/)
{
if($tmpl)
{
die("Error at line $i: Incorrect Syntax:\n$line\n");
}
else
{
$ftable{$cb}[@{$ftable{$cb}}] = [$1];
}
}
elsif( $line =~ qr/$sg_wsrgx/ or $line =~ qr/$sg_comrgx/)
{
next;
}
else
{
die("Error at line $i: Incorrect syntax:\n$line\n");
}
}
return %ftable;
}
sub sg_Generate
{
my (%ftable) = @_;
# Operative File handles
my $infileh;
my $outfileh;
my $tfileh;
# Tables:
my %symbols;
my @stable;
# Open Template
# Paths are prefixed by the root path or the src path.
foreach my $i (keys %{ $ftable{temp} })
{
sg_Alert("Template: " . $i . "\n");
open($tfileh, "<", $sg_vars{src} . "/" . $i) or die("Error: Could not open " . $i . "\n");
# Open Source and dest.
foreach my $j ( @{ $ftable{temp}{$i} })
{
sg_Alert("\t" . $j->[0] . " => " . $j->[1] . "\n");
open($infileh, "<", $sg_vars{src} . "/" . $j->[0]) or die("Error: Could not open " . $j->[0] . "\n");
open($outfileh, ">",$sg_vars{root} . "/" . $j->[1]) or die("Error: Could not open " . $j->[1] . "\n");
# Ready the files
sg_ParseSrc($infileh, \@stable, \%symbols);
sg_GTemplate($tfileh, $infileh, \@stable, \%symbols, $outfileh);
close($infileh);
close($outfileh);
}
foreach my $i ( @{ $ftable{copy} })
{
if(undef $i->[1])
{
$i->[1] = $i->[0];
}
sg_GCopy($sg_vars{root} . $i->[0], $sg_vars{root} . $i->[1]);
}
$tfileh = sg_LoadFile("<", $sgm_fdirindex);
foreach my $i ( @{ $ftable{findex} })
{
my $outfilen;
my $dirh;
sg_Alert("Dir: " . $i->[0] . "\n");
opendir($dirh, $sg_vars{root} . $i->[0]) or die("Error: Could not open " . $i->[0] . "\n");
if(exists $i->[1])
{
$outfilen = $i->[1];
}
else
{
$outfilen = $i->[0] . "/index.html";
}
open($outfileh, ">", $sg_vars{root} . $outfilen) or die("Error: Could not open " . $outfilen . "\n");
sg_GFindex($i->[0], $dirh, $outfileh, $tfileh);
close($dirh);
close($outfileh);
}
close($tfileh);
}
}
sub sg_Main {
my $phelp = 1;
my $fcfgh;
my $nfcfg;
my %ftable;
for(my $i = 0; $i <= $#ARGV; ++$i)
{
$_ = $ARGV[$i];
if(/-V/ || /--version/)
{
print("SSGen Version " . $sg_i_version . "\n");
exit(0);
}
elsif(/-h/ || /--help/)
{
print($sg_i_helpmsg);
exit(0);
}
elsif(/-c/)
{
open($fcfgh, "<", $ARGV[$i + 1]) or
die("Error: Could not open " . $ARGV[$i + 1] . "\n");
$nfcfg = \$ARGV[$i + 1];
$phelp = 0;
++$i;
next;
}
elsif(/-v/ || /--verbose/)
{
$sg_i_verbose = 1;
}
else
{
print("Error: Unknown flag " . $ARGV[$i] . "\n");
print($sg_i_helpmsg);
exit(1);
}
}
print($sg_i_helpmsg) and exit(0) if($phelp);
sg_Alert("Parsing: " . $$nfcfg . "\n");
%ftable = sg_ParseCfg($fcfgh);
close($fcfgh);
die("Error: Nothing to process.\n") if(keys %ftable <= 0);
#Debug
sg_Generate(%ftable);
sg_Alert("Done.\n");
}
sg_Main();