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[ps-cgit] / README

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                        cgit - cgi for git
 
 
                        cgit - cgi for git
 
 

-This is an attempt to create a fast web interface for the git scm, using a 
-frontside cache to decrease server io-pressure.
+This is an attempt to create a fast web interface for the git scm, using a
+builtin cache to decrease server io-pressure.

 
 

-When cgit is invoked, it looks for a cached page matching the request. If no
-such cachefile exist (or it has expired), it is (re)generated. Finally, the
-cachefile is returned to the client.

 
 

-If the cachefile has expired, but cgit is unable to lock the cachefile, the 
-client will get the stale cachefile after all. This is done to favour page
+Installation
+
+Building cgit involves building a proper version of git. How to do this
+depends on how you obtained the cgit sources:
+
+a) If you're working in a cloned cgit repository, you first need to
+initialize and update the git submodule:
+
+  $ git submodule init     # register the git submodule in .git/config
+  $ $EDITOR .git/config    # if you want to specify a different url for git
+  $ git submodule update   # clone/fetch and checkout correct git version
+
+b) If you're building from a cgit tarball, you can download a proper git
+version like this:
+
+  $ make get-git
+
+
+When either a) or b) has been performed, you can build and install cgit like
+this:
+
+  $ make
+  $ sudo make install
+
+This will install cgit.cgi and cgit.css into "/var/www/htdocs/cgit". You can
+configure this location (and a few other things) by providing a "cgit.conf"
+file (see the Makefile for details).
+
+
+Dependencies:
+  -git 1.7.4
+  -zip lib
+  -crypto lib
+  -openssl lib
+
+
+Apache configuration
+
+A new Directory-section must probably be added for cgit, possibly something
+like this:
+
+  <Directory "/var/www/htdocs/cgit/">
+      AllowOverride None
+      Options +ExecCGI
+      Order allow,deny
+      Allow from all
+  </Directory>
+
+
+Runtime configuration
+
+The file /etc/cgitrc is read by cgit before handling a request. In addition
+to runtime parameters, this file may also contain a list of repositories
+displayed by cgit (see cgitrc.5.txt for further details).
+
+
+The cache
+
+When cgit is invoked it looks for a cachefile matching the request and
+returns it to the client. If no such cachefile exist (or if it has expired),
+the content for the request is written into the proper cachefile before the
+file is returned.
+
+If the cachefile has expired but cgit is unable to obtain a lock for it, the
+stale cachefile is returned to the client. This is done to favour page

 throughput over page freshness.
 
 throughput over page freshness.
 

-Also, when a cachefile is generated, a few cache-related http-headers are
-created: "Modified" is set to current time(2), while "Expires" is set to 
-time(2) + <cachefile TTL> * 60 (unless the TTL is negative, in which case it
-is read as "60 * 60 * 24 * 365"). This is done to avoid repeated requests for
-already visited pages.
+The generated content contains the complete response to the client, including
+the http-headers "Modified" and "Expires".

 
 

-The following cache-related options can be set in /etc/cgitrc:

 
 

-  cache-root=<path>           root directory for cache files
-  cache-root-ttl=<min>        TTL for the repo listing page
-  cache-repo-ttl=<min>        TTL for repo summary pages
-  cache-dynamic-ttl=<min>     TTL for pages with symbolic references
-  cache-static-ttl=<min>      TTL for pages with sha1 references
+Online presence

 
 

-The cachefiles are split into different directories, based on the requested
-repository and page:
+* The cgit homepage is hosted by cgit at http://git.zx2c4.com/cgit/about

 
 

-  Repo listing:  <cachedir>/index.html
-  Repo summary:  <cachedir>/<repo>/index.html
-  Repo subpage:  <cachedir>/<repo>/<page>/<querystring>.html
+* Patches, bugreports, discussions and support should go to the cgit
+  mailing list: cgit@hjemli.net