[PATCH] git-instaweb: Add option to reuse previous config file

[Pavan Kumar Sunkara <pavan.sss1991@gmail.com>]

Add an option to git-instaweb which allows the usage of the old
gitweb_config.perl situated in '.git/gitweb' dir. When the option
is in use, gitweb_conf() won't be used and thus the gitweb_config.perl
won't be overwritten.

Usage:
	git instaweb --reuse-config

Example:
	When I use git-instaweb, it is hard to add the line (Use of
highlighting support) $feature{'highlight'}{'default'] = [1]; to the
gitweb_config.perl file everytime I initiate the server. With this,
it's enough to use this option.

Also update Documentation of git-instaweb

Signed-off-by: Pavan Kumar Sunkara <pavan.sss1991@gmail.com>
---
 Documentation/git-instaweb.txt |    5 ++++-
 git-instaweb.sh                |    8 +++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-instaweb.txt b/Documentation/git-instaweb.txt
index 2c3c4d2..0e7e20b 100644
--- a/Documentation/git-instaweb.txt
+++ b/Documentation/git-instaweb.txt
@@ -9,7 +9,7 @@ SYNOPSIS
 --------
 [verse]
 'git instaweb' [--local] [--httpd=<httpd>] [--port=<port>]
-               [--browser=<browser>]
+               [--browser=<browser>] [--reuse-config]
 'git instaweb' [--start] [--stop] [--restart]
 
 DESCRIPTION
@@ -49,6 +49,9 @@ OPTIONS
 	linkgit:git-web--browse[1] for more information about this. If
 	the script fails, the URL will be printed to stdout.
 
+--reuse-config::
+	The previous gitweb_config.perl will not be overwritten.
+
 --start::
 	Start the httpd instance and exit.  This does not generate
 	any of the configuration files for spawning a new instance.
diff --git a/git-instaweb.sh b/git-instaweb.sh
index 1af4d5a..7b8b8d1 100755
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -13,6 +13,7 @@ p,port=        the port to bind to
 d,httpd=       the command to launch
 b,browser=     the browser to launch
 m,module-path= the module path (only needed for apache2)
+reuse-config	To use the previous gitweb_config.perl file from GIT_DIR. It will not be overwritten.
  Action
 stop           stop the web server
 start          start the web server
@@ -27,6 +28,7 @@ httpd="$(git config --get instaweb.httpd)"
 root="$(git config --get instaweb.gitwebdir)"
 port=$(git config --get instaweb.port)
 module_path="$(git config --get instaweb.modulepath)"
+no_reuse=true
 
 conf="$GIT_DIR/gitweb/httpd.conf"
 
@@ -171,6 +173,10 @@ do
 		shift
 		module_path="$1"
 		;;
+	--reuse-config)
+		shift
+		no_reuse=false
+		;;
 	--)
 		;;
 	*)
@@ -551,7 +557,7 @@ our \$projects_list = \$projectroot;
 EOF
 }
 
-gitweb_conf
+test "$no_reuse" = true && gitweb_conf
 
 resolve_full_httpd
 mkdir -p "$fqgitdir/gitweb/$httpd_only"
-- 
1.7.1.390.gb0a41.dirty