git-merge: show usage if run without arguments

diff --git a/git-instaweb.sh b/git-instaweb.sh
index 69aef3c20b099edd32aaa76ad8cfceb7e3f8a53a..16cd351f7f0d992be37be83017961c70731d4cc5 100755 (executable)
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -25,7 +25,7 @@ conf=$GIT_DIR/gitweb/httpd.conf
 
 # Defaults:
 
-# if installed, it doens't need further configuration (module_path)
+# if installed, it doesn't need further configuration (module_path)
 test -z "$httpd" && httpd='lighttpd -f'
 
 # probably the most popular browser among gitweb users
@@ -54,6 +54,10 @@ start_httpd () {
                        fi
                done
        fi
+       if test $? != 0; then
+               echo "Could not execute http daemon $httpd."
+               exit 1
+       fi
 }
 
 stop_httpd () {
@@ -183,8 +187,10 @@ PerlPassEnv GIT_EXEC_DIR
 EOF
        else
                # plain-old CGI
+               list_mods=`echo "$httpd" | sed "s/-f$/-l/"`
+               $list_mods | grep 'mod_cgi\.c' >/dev/null 2>&1 || \
+               echo "LoadModule cgi_module $module_path/mod_cgi.so" >> "$conf"
                cat >> "$conf" <<EOF
-LoadModule cgi_module $module_path/mod_cgi.so
 AddHandler cgi-script .cgi
 <Location /gitweb.cgi>
        Options +ExecCGI
@@ -232,4 +238,5 @@ esac
 
 start_httpd
 test -z "$browser" && browser=echo
-$browser http://127.0.0.1:$port
+url=http://127.0.0.1:$port
+$browser $url || echo $url