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#!/usr/bin/perl
#
# Copyright (C) 2013 Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
use Getopt::Long;
use CGI::SSI;
sub main
{
my %opts;
my $input;
my $output;
$SIG{'__WARN__'} = \&warning;
Getopt::Long::Configure("no_ignore_case", "bundling", "gnu_compat",
"no_getopt_compat");
if (not GetOptions(\%opts,
"o=s",
"D=s%",
"I=s",
"h|help",
"V|version",
)) {
usage(*STDERR);
exit(4);
}
if (exists($opts{'h'})) {
help(*STDOUT);
exit(0);
}
if (exists($opts{'V'})) {
version(*STDOUT);
exit(0);
}
if ($#ARGV lt 0) {
error(4, "No input files\n");
}
if (exists($opts{'o'})) {
if ($#ARGV gt 0) {
error(4, "Cannot specify -o with multiple files\n");
}
compile($ARGV[0], $opts{'o'}, $opts{'D'}, $opts{'I'});
} else {
for $input (@ARGV) {
$output = $input;
$output =~ s/\.[^.]+$/.html/;
compile($input, $output, $opts{'D'}, $opts{'I'});
}
}
}
sub usage
{
my ($fh) = @_;
printf($fh "Usage: %s [-o <output>] <input> ...\n", $0);
}
sub help
{
my ($fh) = @_;
usage($fh);
print("Options:\n");
print(" -D <name>=<value> Set the variable <name> to <value>\n");
print(" -I <directory> Set the document root to <directory>\n");
print(" -o <output> Place the output into <output>\n");
print(" -h, --help Display this information\n");
print(" -V, --version Display compiler version information\n");
}
sub version
{
my ($fh) = @_;
print("ssic 0.1.0\n");
print("Copyright (C) 2013 Patrick \"P. J.\" McDermott\n");
print("License GPLv3+: GNU GPL version 3 or later " .
"<http://gnu.org/licenses/gpl.html>.\n");
print("This is free software: you are free to change and " .
"redistribute it.\n");
print("There is NO WARRANTY, to the extent permitted by law.\n");
}
sub warning
{
my ($fmt, @args) = @_;
printf(STDERR "ssic: Warning: " . $fmt, @args);
}
sub error
{
my ($status, $fmt, @args) = @_;
printf(STDERR "ssic: Error: " . $fmt, @args);
exit($status);
}
sub compile
{
my ($input, $output, $vars, $root) = @_;
my $input_fh;
my $input_abs;
my $output_fh;
my $ssi;
my $var_name;
my $var_value;
if ($input eq $output and $input ne "-") {
warning("Input and output files are equal\n");
}
if ($input eq "-") {
$input_fh = *STDIN;
$input_abs = File::Spec->rel2abs(".");
} else {
if (not open($input_fh, "<", $input)) {
error(4, "%s: %s\n", $input, $!);
}
$input_abs = File::Spec->rel2abs($input);
}
if ($output eq "-") {
$output_fh = *STDOUT;
} else {
if (not open($output_fh, ">", $output . "~")) {
error(4, "%s: %s\n", $output . "~", $!);
}
}
# CGI::SSI uses SCRIPT_FILENAME to determine the value of LAST_MODIFIED.
%ENV = (
"DOCUMENT_NAME" => $input,
"DOCUMENT_URI" => $input,
"DOCUMENT_ROOT" => $root,
"SCRIPT_FILENAME" => $input_abs,
);
$CGI::SSI::DEBUG = 0;
$ssi = CGI::SSI->new(
"DOCUMENT_NAME" => $input,
"DOCUMENT_URI" => $input,
"DOCUMENT_ROOT" => $root,
);
while (($var_name, $var_value) = each(%{$vars})) {
$ssi->set($var_name => $var_value);
}
print($output_fh $ssi->process(<$input_fh>));
if ($input ne "-") {
close($input_fh);
}
if ($output ne "-") {
close($output_fh);
}
if (not rename($output . "~", $output)) {
error(4, "%s: %s\n", $output, $!);
}
}
main();
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