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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head><title>Hat in CVS</title></head>
<body bgcolor=#ffffff>
<table><tr><td width=500>
<center>
<h1>CVS access to Hat</h1>
</center>
<hr>
<p>
This page tells you how to get CVS access to the latest, most current,
<em>Hat</em> sources.
<h3>Remote Read-only CVS Access</h3>
<p>
Read-only access is available to anyone - there's no need to ask us
first. To get read-only access to the repository:
<ul>
<li> Obviously, you need to have the <em>cvs</em> command installed.
<li> The first time you access the repository, you'll need to do
the following:
<pre>
$ cvs -d :pserver:anoncvs@cvs.haskell.org:/cvs login
Password: cvs
</pre>
You only need to supply the password once, because cvs will squirrel
it away for future use in $HOME/.cvspass.
<li> To checkout the hat sources, use this command:
<pre>
$ cvs -d :pserver:anoncvs@cvs.haskell.org:/cvs checkout hat
</pre>
The checked-out source tree will appear in a directory called
<tt>hat</tt>. You can rename this directory to whatever you
like, CVS won't mind.
<li> From then on, you should no longer need the <em>-d blah</em> option,
and commands like
<pre>
$ cvs diff
$ cvs update
</pre>
should work, provided your working directory is somewhere inside
the checked out tree. In normal use, <tt>cvs update</tt>
is the command to merge the latest changes from the central
repository into your local tree. <tt>cvs diff</tt> gives you
the differences between your version and the central version.
<li> If you change your current directory into a sub-directory of the
CVS tree, cvs commands will normally operate only on that subtree,
not on the full tree. This is very handy if you are only interested
in a small part of the source.
</ul>
<p>
With read-only CVS access you can do anything except commit changes
to the repository. You can make changes to your local tree, and still
use CVS's update facility to keep your tree otherwise up-to-date,
and you can generate patches using <tt>cvs diff</tt> in order to send
to us for inclusion.
<p>
To set up default flags for some of the CVS commands, you can create
a <tt>.cvsrc</tt> file. For instance, the -P flag to 'update' says
prune empty directories, which is normally what you want, and the -d
flag ensures that you collect new directories that have been added.
Here is an example <tt>.cvsrc</tt> file:
<pre>
checkout -P
release -d
update -d -P
diff -c
</pre>
<h3>Using the checked-out CVS tree</h3>
<p>
The first thing to do after checking out a fresh tree is
<tt>./configure</tt>, setting whatever options you wish to use.
It is always safe to re-run the <tt>./configure</tt> script at any
time - it will never leave your configuration in an inconsistent state.
The machine/OS combination is always detected first so you can't re-use
the wrong machine configuration by mistake, and although previous
options for a particular machine are cached, they are always reported,
and can be always overridden on the command line.
<p>
Then, do a <tt>make</tt> with whatever targets you are interested
in: <tt>make help</tt> will give you a list of the common ones.
For instance, <tt>make hat</tt> gives you everything, but <tt>make
hat-tools</tt> gives you just the browsing tools.
<h3>Tracking changes in the CVS repository</h3>
<p>
The log messages of all CVS commit actions are currently sent to the
mailing list <tt>cvs-nhc98@haskell.org</tt>. If you wish to see who
is making changes, why, and and what they say about them, please do
join this list - see <a href="http://haskell.org/mailman/listinfo">
<tt>http://haskell.org/mailman/listinfo</tt></a> for further details.
<h3>Core developers - write-access to CVS</h3>
<p>
Core developers of <em>hat</em> have write-access to the CVS
repository. They need to use a slightly different procedure for
accessing the source tree:
<ul>
<li> You need to have <em>ssh</em> (secure shell) installed.
<li> Set your CVS_RSH environment variable to <tt>ssh</tt>.
<li> The first time you access the repository, you'll need to do
the following:
<pre>
$ cvs -d :ext:<em>username</em>@cvs.haskell.org:/home/cvs/root checkout hat
</pre>
</ul>
<p>
All the other instructions are the same, except that developers also
have permission to commit changes to the repository.
<h3>Gaining write-access</h3>
<p>
To obtain write-access to cvs.haskell.org, you need to ask the
Haskell CVS maintainer - Jeff Lewis <jlewis@galconn.com> - for
an account. The details are on the
<a href="http://www.haskell.org/ghc/docs/latest/html/building/sec-cvs.html">
GHC CVS cheat-sheet</a> (Section 2.1.2).
<p>
<hr>
<p>
The latest updates to these pages are available on the WWW from
<a href="http://www.haskell.org/nhc98/">
<tt>http://www.haskell.org/nhc98/</tt></a><br>
<a href="http://www.cs.york.ac.uk/fp/nhc98/">
<tt>http://www.cs.york.ac.uk/fp/nhc98/</tt></a>
<p>
This page last modified: 13th March 2003<br>
<a href="http://www.cs.york.ac.uk/fp/">
York Functional Programming Group</a><br>
</td></tr></table>
</body></html>
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