#!/usr/bin/perl -s
#
# cvsweb - a CGI interface to the CVS tree.
#
# Written by Bill Fenner <fenner@parc.xerox.com> on his own time.
# Insert BSD copyright here.
#
#HTTP_USER_AGENT: Mozilla/1.1N (X11; I; SunOS 4.1.3_U1 sun4m) via proxy gateway CERN-HTTPD/3.0 libwww/2.17
#SERVER_NAME: www.freebsd.org
#QUERY_STRING: baz
#SCRIPT_FILENAME: /usr/local/www/cgi-bin/env.pl
#SERVER_PORT: 80
#HTTP_ACCEPT: */*, image/gif, image/x-xbitmap, image/jpeg
#SERVER_PROTOCOL: HTTP/1.0
#HTTP_COOKIE: s=beta26429821397802167
#PATH_INFO: /foo/bar
#REMOTE_ADDR: 13.1.64.94
#DOCUMENT_ROOT: /usr/local/www/data/
#PATH: /sbin:/bin:/usr/sbin:/usr/bin
#PATH_TRANSLATED: /usr/local/www/data//foo/bar
#GATEWAY_INTERFACE: CGI/1.1
#REQUEST_METHOD: GET
#SCRIPT_NAME: /cgi-bin/env.pl
#SERVER_SOFTWARE: Apache/1.0.0
#REMOTE_HOST: beta.xerox.com
#SERVER_ADMIN: webmaster@freebsd.org
#
require 'timelocal.pl';
require 'ctime.pl';
$hsty_base = "";
require 'cgi-style.pl';
$cvsroot = '/home/ncvs';
$intro = "
This is a WWW interface to the FreeBSD CVS tree.
You can browse the file hierarchy by picking directories
(which have slashes after them, e.g. <b>src/</b>).
If you pick a file, you will see the revision history
for that file.
Selecting a revision number will download that revision of
the file. There is a link at each revision to display
diffs between that revision and the previous one, and
a form at the bottom of the page that allows you to
display diffs between arbitrary revisions.
<p>
Please send any suggestions, comments, etc. to
<A HREF=\"mailto:fenner@freebsd.org\">Bill Fenner <fenner@freebsd.org></A>
";
$shortinstr = "
Click on a directory to enter that directory. Click on a file to display
its revision history and to get a
chance to display diffs between revisions.
";
$verbose = $v;
($where = $ENV{'PATH_INFO'}) =~ s|^/||;
$where =~ s|/$||;
$fullname = $cvsroot . '/' . $where;
($scriptname = $ENV{'SCRIPT_NAME'}) =~ s|^/?|/|;
$scriptname =~ s|/$||;
$scriptwhere = $scriptname . '/' . $where;
$scriptwhere =~ s|/$||;
if (!-d $cvsroot) {
&fatal("500 Internal Error",'$CVSROOT not found!');
}
if (-d $fullname) {
# Something that would be nice to support, although I have no real
# good idea of how, would be to get full directory diff's, using
# symbolic names (revision numbers would be meaningless).
# The problem is finding a list of symbolic names that is common
# to all the files in the directory.
#
opendir(DIR, $fullname) || &fatal("404 Not Found","$where: $!");
@dir = readdir(DIR);
closedir(DIR);
if ($where eq '') {
print &html_header("FreeBSD CVS Repository");
print $intro;
} else {
print &html_header("/$where");
print $shortinstr;
}
print "<p>Current directory: <b>/$where</b>\n";
print "<P><HR NOSHADE>\n";
# Using <MENU> in this manner violates the HTML2.0 spec but
# provides the results that I want in most browsers. Another
# case of layout spooging up HTML.
print "<MENU>\n";
foreach (sort @dir) {
if ($_ eq '.') {
next;
}
if ($_ eq '..') {
next if ($where eq '');
($updir = $scriptwhere) =~ s|[^/]+$||;
print "<IMG SRC=\"/icons/back.gif\"> ",
&link("Previous Directory",$updir), "<BR>";
} elsif (-d $fullname . "/" . $_) {
print "<IMG SRC=\"/icons/dir.gif\"> ",
&link($_ . "/", $scriptwhere . '/' . $_ . '/'), "<BR>";
} elsif (s/,v$//) {
print "<IMG SRC=\"/icons/text.gif\"> ",
&link($_, $scriptwhere . '/' . $_), "<BR>";
}
}
print "</MENU>\n";
print &html_footer;
print "</BODY></HTML>\n";
} elsif (-f $fullname . ',v') {
if ($_ = $ENV{'QUERY_STRING'}) {
s/%(..)/sprintf("%c", hex($1))/ge; # unquote %-quoted
if (/rev=([\d\.]+)/) {
$rev = $1;
open(RCS, "co -p$rev '$fullname' 2>&1 |") ||
&fail("500 Internal Error", "Couldn't co: $!");
# /home/ncvs/src/sys/netinet/igmp.c,v --> standard output
# revision 1.1.1.2
# /*
$_ = <RCS>;
if (/^$fullname,v\s+-->\s+standard output\s*$/o) {
# As expected
} else {
&fatal("500 Internal Error",
"Unexpected output from co: $_");
}
$_ = <RCS>;
if (/^revision\s+$rev\s*$/) {
# As expected
} else {
&fatal("500 Internal Error",
"Unexpected output from co: $_");
}
$| = 1;
print "Content-type: text/plain\n";
print "Content-encoding: x-gzip\n\n";
open(GZIP, "|gzip -1 -c"); # need lightweight compression
print GZIP <RCS>;
close(GZIP);
close(RCS);
exit;
}
if (/r1=([^&:]+)(:([^&]+))?/) {
$rev1 = $1;
$sym1 = $3;
}
if ($rev1 eq 'text') {
if (/tr1=([^&]+)/) {
$rev1 = $1;
}
}
if (/r2=([^&:]+)(:([^&]+))?/) {
$rev2 = $1;
$sym2 = $3;
}
if ($rev2 eq 'text') {
if (/tr2=([^&]+)/) {
$rev2 = $1;
}
}
if (!($rev1 =~ /^[\d\.]+$/) || !($rev2 =~ /^[\d\.]+$/)) {
&fatal("404 Not Found",
"Malformed query \"$ENV{'QUERY_STRING'}\"");
}
#
# rev1 and rev2 are now both numeric revisions.
# Thus we do a DWIM here and swap them if rev1 is after rev2.
# XXX should we warn about the fact that we do this?
if (&revcmp($rev1,$rev2) > 0) {
($tmp1, $tmp2) = ($rev1, $sym1);
($rev1, $sym1) = ($rev2, $sym2);
($rev2, $sym2) = ($tmp1, $tmp2);
}
#
$difftype = "-u";
$diffname = "Unidiff";
if (/f=([^&]+)/) {
if ($1 eq 'c') {
$difftype = '-c';
$diffname = "Context diff";
}
}
# XXX should this just be text/plain
# or should it have an HTML header and then a <pre>
print "Content-type: text/plain\n\n";
open(RCSDIFF, "rcsdiff $difftype -r$rev1 -r$rev2 '$fullname' 2>&1 |") ||
&fail("500 Internal Error", "Couldn't rcsdiff: $!");
#
#===================================================================
#RCS file: /home/ncvs/src/sys/netinet/tcp_output.c,v
#retrieving revision 1.16
#retrieving revision 1.17
#diff -c -r1.16 -r1.17
#*** /home/ncvs/src/sys/netinet/tcp_output.c 1995/11/03 22:08:08 1.16
#--- /home/ncvs/src/sys/netinet/tcp_output.c 1995/12/05 17:46:35 1.17
#
# Ideas:
# - nuke the stderr output if it's what we expect it to be
# - Add "no differences found" if the diff command supplied no output.
#
#*** src/sys/netinet/tcp_output.c 1995/11/03 22:08:08 1.16
#--- src/sys/netinet/tcp_output.c 1995/12/05 17:46:35 1.17 RELENG_2_1_0
# (bogus example, but...)
#
if ($difftype eq '-u') {
$f1 = '---';
$f2 = '\+\+\+';
} else {
$f1 = '\*\*\*';
$f2 = '---';
}
while (<RCSDIFF>) {
if (m|^$f1 $cvsroot|o) {
s|$cvsroot/||o;
if ($sym1) {
chop;
$_ .= " " . $sym1 . "\n";
}
} elsif (m|^$f2 $cvsroot|o) {
s|$cvsroot/||o;
if ($sym2) {
chop;
$_ .= " " . $sym2 . "\n";
}
}
print $_;
}
close(RCSDIFF);
exit;
}
open(RCS, "rlog '$fullname'|") || &fatal("500 Internal Error",
"Failed to spawn rlog");
while (<RCS>) {
print if ($verbose);
if ($symnames) {
if (/^\s+([^:]+):\s+([\d\.]+)/) {
$symrev{$1} = $2;
if ($revsym{$2}) {
$revsym{$2} .= ", ";
}
$revsym{$2} .= $1;
} else {
$symnames = 0;
}
} elsif (/^symbolic names/) {
$symnames = 1;
} elsif (/^-----/) {
last;
}
}
# each log entry is of the form:
# ----------------------------
# revision 3.7.1.1
# date: 1995/11/29 22:15:52; author: fenner; state: Exp; lines: +5 -3
# log info
# ----------------------------
logentry:
while (!/^=========/) {
$_ = <RCS>;
print "R:", $_ if ($verbose);
if (/^revision ([\d\.]+)/) {
$rev = $1;
} elsif (/^========/ || /^----------------------------$/) {
next logentry;
} else {
&fatal("500 Internal Error","Error parsing RCS output: $_");
}
$_ = <RCS>;
print "D:", $_ if ($verbose);
if (m|^date:\s+(\d+)/(\d+)/(\d+)\s+(\d+):(\d+):(\d+);\s+author:\s+(\S+);|) {
$yr = $1;
# damn 2-digit year routines
if ($yr > 100) {
$yr -= 1900;
}
$date{$rev} = &timelocal($6,$5,$4,$3,$2 - 1,$yr);
$author{$rev} = $7;
} else {
&fatal("500 Internal Error", "Error parsing RCS output: $_");
}
line:
while (<RCS>) {
print "L:", $_ if ($verbose);
next line if (/^branches:\s/);
last line if (/^----------------------------$/ || /^=========/);
$log{$rev} .= $_;
}
print "E:", $_ if ($verbose);
}
close(RCS);
print "Done reading RCS file\n" if ($verbose);
#
# Sort the revisions into commit-date order.
@revorder = sort {$date{$b} <=> $date{$a}} keys %date;
print "Done sorting revisions\n" if ($verbose);
#
# HEAD is an artificial tag which is simply the highest tag number on the main
# branch (I think!). Find it by looking through @revorder; it should at least
# be near the beginning (In fact, it *should* be the first commit listed on
# the main branch.)
revision:
for ($i = 0; $i <= $#revorder; $i++) {
if ($revorder[$i] =~ /^\d+\.\d+$/) {
if ($revsym{$revorder[$i]}) {
$revsym{$revorder[$i]} .= ", ";
}
$revsym{$revorder[$i]} .= "HEAD";
$symrev{"HEAD"} = $revorder[$i];
last revision;
}
}
print "Done finding HEAD\n" if ($verbose);
#
# Now that we know all of the revision numbers, we can associate
# absolute revision numbers with all of the symbolic names, and
# pass them to the form so that the same association doesn't have
# to be built then.
#
# should make this a case-insensitive sort
foreach (sort keys %symrev) {
$rev = $symrev{$_};
if ($rev =~ /^(\d+(\.\d+)+)\.0\.(\d+)$/) {
#
# A revision number of A.B.0.D really translates into
# "the highest current revision on branch A.B.D".
#
# If there is no branch A.B.D, then it translates into
# the head A.B .
#
# This is pure speculation.
#
$head = $1;
$branch = $3;
$regex = $head . "." . $branch;
$regex =~ s/\./\./g;
# <
# \____/
$rev = $head;
revision:
foreach $r (@revorder) {
if ($r =~ /^${regex}/) {
$rev = $head . "." . $branch;
last revision;
}
}
$revsym{$rev} .= ", " if ($revsym{$rev});
$revsym{$rev} .= $_;
}
$sel .= "<OPTION VALUE=\"${rev}:${_}\">$_\n";
}
print "Done associating revisions with branches\n" if ($verbose);
print &html_header("CVS log for $where");
($upwhere = $where) =~ s|[^/]+$||;
print "Up to ", &link($upwhere,$scriptname . "/" . $upwhere);
print "<BR>\n";
print "<A HREF=\"#diff\">Request diff between arbitrary revisions</A>\n";
print "<HR NOSHADE>\n";
# The other possible U.I. I can see is to have each revision be hot
# and have the first one you click do ?r1=foo
# and since there's no r2 it keeps going & the next one you click
# adds ?r2=foo and performs the query.
# I suppose there's no reason we can't try both and see which one
# people prefer...
for ($i = 0; $i <= $#revorder; $i++) {
$_ = $revorder[$i];
print "<a NAME=\"rev$_\"></a>";
foreach $sym (split(", ", $revsym{$_})) {
print "<a NAME=\"$sym\"></a>";
}
($br = $_) =~ s/\.\d+$//;
if ($revsym{$br} && !$nameprinted{$br}) {
foreach $sym (split(", ", $revsym{$br})) {
print "<a NAME=\"$sym\"></a>";
}
$nameprinted{$br}++;
}
print "\n";
# print "RCS revision <b>$_</b>\n";
print "<A HREF=\"$scriptwhere?rev=$_\"><b>$_</b></A>";
if (/^1\.1\.1\.\d+$/) {
print " <i>(vendor branch)</i>";
}
# print "<BR>\n";
# print "Checked in on <i>" . &ctime($date{$_}) . "</i> by ";
# print "<i>" . $author{$_} . "</i><BR>\n";
print " <i>" . &ctime($date{$_}) . "</i> by ";
print "<i>" . $author{$_} . "</i>\n";
if ($revsym{$_}) {
# print "CVS Tags: <b>$revsym{$_}</b><BR>\n";
print "<BR>CVS Tags: <b>$revsym{$_}</b>";
}
if ($revsym{$br}) {
# print "Branch: <b>$revsym{$br}</b><BR>\n";
if ($revsym{$_}) {
print "; ";
} else {
print "<BR>";
}
print "Branch: <b>$revsym{$br}</b>";
}
# Find the previous revision on this branch.
# I think this can be done algorithmically.
@prevrev = split(/\./, $_);
if (--$prevrev[$#prevrev] == 0) {
# If it was X.Y.Z.1, just make it X.Y
if ($#prevrev > 1) {
pop(@prevrev);
pop(@prevrev);
} else {
# It was rev 1.1 (XXX does CVS use revisions
# greater than 1.x?)
if ($prevrev[0] != 1) {
print "<i>* I can't figure out the previous revision! *</i>\n";
}
}
}
if ($prevrev[$#prevrev] != 0) {
$prev = join(".", @prevrev);
print "<BR><A HREF=\"$scriptwhere?r1=$prev";
print "&r2=$_\">Diffs to $prev</A>\n";
#
# Plus, if it's on a branch, and it's not a vendor branch,
# offer to diff with the immediately-preceding commit if it
# is not the previous revision as calculated above
# and if it is on the HEAD (or at least on a higher branch)
# (e.g. change gets committed and then brought
# over to -stable)
if (!/^1\.1\.1\.\d+$/ && ($i != $#revorder) &&
($prev ne $revorder[$i+1])) {
@tmp1 = split(/\./, $revorder[$i+1]);
@tmp2 = split(/\./, $_);
if ($#tmp1 < $#tmp2) {
print "; <A HREF=\"$scriptwhere?r1=$revorder[$i+1]";
print "&r2=$_\">Diffs to $revorder[$i+1]</A>\n";
}
}
}
# print "Log message:<BR>\n";
print "<PRE>\n";
print &htmlify($log{$_});
print "</PRE><HR NOSHADE>\n";
}
print "<A NAME=diff>\n";
print "This form allows you to request diff's between any two\n";
print "revisions of a file. You may select a symbolic revision\n";
print "name using the selection box or you may type in a numeric\n";
print "name using the type-in text box.\n";
print "</A><P>\n";
print "<FORM METHOD=\"GET\" ACTION=\"$scriptwhere\">\n";
print "Diffs between \n";
print "<SELECT NAME=\"r1\">\n";
print "<OPTION VALUE=\"text\" SELECTED>Use Text Field\n";
print $sel;
print "</SELECT>\n";
print "<INPUT TYPE=\"TEXT\" NAME=\"tr1\" VALUE=\"$revorder[$#revorder]\">\n";
print " and \n";
print "<SELECT NAME=\"r2\">\n";
print "<OPTION VALUE=\"text\" SELECTED>Use Text Field\n";
print $sel;
print "</SELECT>\n";
print "<INPUT TYPE=\"TEXT\" NAME=\"tr2\" VALUE=\"$revorder[0]\">\n";
print "<BR><INPUT TYPE=RADIO NAME=\"f\" VALUE=u CHECKED>Unidiff<br>\n";
print "<INPUT TYPE=RADIO NAME=\"f\" VALUE=c>Context diff<br>\n";
print "<INPUT TYPE=SUBMIT VALUE=\"Get Diffs\">\n";
print "</FORM>\n";
print &html_footer;
print "</BODY></HTML>\n";
} else {
# Assume it's a module name with a potential path following it.
$where =~ s|/.*||;
$xtra = $&;
# Is there an indexed version of modules?
if (open(MODULES, "$cvsroot/CVSROOT/modules")) {
while (<MODULES>) {
if (/^${where}\s+(\S+)/o && -d "${cvsroot}/$1") {
&redirect($scriptname . '/' . $1 . $xtra);
}
}
}
&fatal("404 Not Found","$where: no such file or directory");
}
sub htmlify {
local($string) = @_;
$string =~ s/&/&/g;
$string =~ s/</</g;
$string =~ s/>/>/g;
$string;
}
sub link {
local($name, $where) = @_;
"<A HREF=\"$where\">$name</A>\n";
}
sub revcmp {
local($rev1, $rev2) = @_;
local(@r1) = split(/\./, $rev1);
local(@r2) = split(/\./, $rev2);
local($a,$b);
while (($a = shift(@r1)) && ($b = shift(@r2))) {
if ($a != $b) {
return $a <=> $b;
}
}
if (@r1) { return 1; }
if (@r2) { return -1; }
return 0;
}
sub fatal {
local($errcode, $errmsg) = @_;
print "Status: $errcode\n";
print "Content-type: text/html\n";
print "\n";
print "<HTML><HEAD><TITLE>Error</TITLE></HEAD>\n";
print "<BODY>Error: $errmsg</BODY></HTML>\n";
exit(1);
}
sub redirect {
local($url) = @_;
print "Status: 301 Moved\n";
print "Location: $url\n";
print "\n";
print "<HTML><HEAD><TITLE>Moved</TITLE></HEAD>\n";
print "<BODY>This document is located <A HREF=$url>here</A>.</BODY></HTML>\n";
exit(1);
}