Only warn if input and output files are equal.

[ssic.git] / src / ssic.pl

diff --git a/src/ssic.pl b/src/ssic.pl
index db7a39f047c033c381daa95e3fc40c7037069b94..750c77be6b9021a72284ed8cec2d844390c52c5d 100644 (file)
--- a/src/ssic.pl
+++ b/src/ssic.pl
@@ -19,6 +19,7 @@ sub main
        if (not GetOptions(\%opts,
                        "o=s",
                        "D=s%",
+                       "I=s",
                        "h|help",
                        "V|version",
                )) {
@@ -42,12 +43,12 @@ sub main
                if ($#ARGV gt 0) {
                        error(4, "Cannot specify -o with multiple files\n");
                }
-               compile($ARGV[0], $opts{'o'}, $opts{'D'});
+               compile($ARGV[0], $opts{'o'}, $opts{'D'}, $opts{'I'});
        } else {
                for $input (@ARGV) {
                        $output = $input;
                        $output =~ s/\.[^.]+$/.html/;
-                       compile($input, $output, $opts{'D'});
+                       compile($input, $output, $opts{'D'}, $opts{'I'});
                }
        }
 }
@@ -66,6 +67,7 @@ sub help
        usage($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");
@@ -101,33 +103,48 @@ sub error
 
 sub compile
 {
-       my ($input, $output, $vars) = @_;
+       my ($input, $output, $vars, $root) = @_;
        my $input_fh;
+       my $input_abs;
        my $output_fh;
        my $ssi;
        my $var_name;
        my $var_value;
 
-       if ($input eq $output) {
-               error(4, "Input and output files are equal\n");
+       if ($input eq $output and $input ne "-") {
+               warning("Input and output files are equal\n");
        }
 
-       if (not open($input_fh, "<", $input)) {
-               error(4, "%s: %s\n", $input, $!);
+       if ($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 (not open($output_fh, ">", $output)) {
-               error(4, "%s: %s\n", $output, $!);
+       if ($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})) {
@@ -135,6 +152,17 @@ sub compile
        }
 
        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();