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Date:      Tue, 30 Sep 1997 19:22:10 +0200 (CEST)
From:      Mikael Karpberg <karpen@ocean.campus.luth.se>
To:        hackers@FreeBSD.ORG
Subject:   TIP: cvs commit readers
Message-ID:  <199709301722.TAA03502@ocean.campus.luth.se>
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Hi!

For all you guys out there that read the cvs commit lists, I have a little
practical javascript code. Some of you have probably (like me) read the
messages, and when wanting to see the diff for a file, used something like
the page posted quite some time ago:

  http://www-intern.bik-gmbh.de/test/cvsmsg.html

This works by a CGI script bouncing you to the right page, which is slow.
Specially if that server is down or unreachable. :-)

So I set out (with the help of a javascipt programmer I know) to correct
this problem. The final result is a little javascript function which can
be used very easilly with a HTML form to do the same thing, but without
CGI programming, and it's therefor a lot easier to add to your own homepage,
or so. Having it locally, and not using a CGI scipt makes the thing so much
faster.

So... For those who are interested, here is the javascript code, embeded
into a small page with just a form on it. Feel free to copy and use.
Maybe ever add to some page like http://www.freebsd.org/support.html, or
let the cgi-script for the cvs pages add it to the CVS root page,
or something.

-------8<--------
<html>

<script language="javascript">

// First we declare a string variable with the basic URL to the cvs
var BAS = "http://www.freebsd.org/cgi/cvsweb.cgi/";

// Then we declare the rev offset string.
var OBAS = "#rev";

// This is the function which produces the correct cvs-URL for our application.
function makecvs(refString)
{
  // Declare two variables to hold the revision and filename, and final URL.
  var fileString="";
  var revString="";
  var finalURL="";

  // Remove initial spaces...
  while (refString.charAt(0) == " ")
  {
    refString=refString.substring(1,refString.length);
  }

  // Using the first space character as delimiter, find the revision.
  revString=refString.substring(0,refString.indexOf(" "));
  if (revString.length==0)
  {
    alert("No revision found!");
    return false;
  }

  // The last part of the string (ending spaces excluded) is the filename
  while (fileString.length==0)
  {
    fileString=refString.substring(refString.lastIndexOf(" ")+1,refString.length);
    if (fileString.length==0)
      refString=refString.substring(0,refString.length-1);
  }

  // Put the final URL together from the smaller parts.
  finalURL = BAS+fileString+OBAS+revString;

  // Change page to the URL we have computed.
  this.document.location.href=finalURL;

  return false;
}

</script>

<body>

<form onsubmit="return makecvs(document.forms[0].textfield.value);">
Enter change-lines below:
<input type=text name="textfield" maxlength=800 size=80>
</form>

</body>
</html>
-------8<--------

Enjoy! Please comment on the script if you feel like it.

  /Mikael

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