fix indexpart usage

fixes #1246

Author: vladak

OpenGrok

@@ -107,9 +107,13 @@ Usage()
     echo ""
     echo "Usage: ${progname} <bootstrap|deploy|derby|update|updateQuietly|usage|help>"
     echo "       ${progname} index [<directory>]"
-    echo "       ${progname} indexpart <src_root> <directory1> [..]"
+    echo "       ${progname} indexpart <directory_1> [<directory_2> ..]"
     echo "       ${progname} clearHistory <src_root> <repository_name>"
     echo ""
+    echo "       The \"indexpart\" assumes that it will be run with configuration"
+    echo "       pointed to via the OPENGROK_READ_XML_CONFIGURATION environment"
+    echo "       variable."
+    echo ""
     echo "  Optional environment variables:"
     echo "    OPENGROK_CONFIGURATION - location of your configuration"
     echo "      e.g. $ OPENGROK_CONFIGURATION=/var/opengrok/myog.conf ${0} ... "
@@ -1053,12 +1057,14 @@ case "${1}" in
         ;;
 
     indexpart)
-        if [ $# -ne 3 ]
+        if [ $# -ne 2 ]
         then
             Usage
         fi
-        SRC_ROOT="${2}"
-        shift 2
+	shift
+	if [ -z "$OPENGROK_READ_XML_CONFIGURATION" ]; then
+	    FatalError "need configuration via OPENGROK_READ_XML_CONFIGURATION"
+	fi
         ValidateConfiguration
         CreateRuntimeRequirements
         UpdateDataPartial $@

README.txt

@@ -350,7 +350,7 @@ It basically works like this:
   2. index the project. It will become searchable after that.
 
      OPENGROK_READ_XML_CONFIGURATION=/var/opengrok/etc/configuration.xml \
-         OpenGrok indexpart /var/opengrok/src /foo
+         OpenGrok indexpart /foo
 
   3. make the project "indexed" status of the project persistent so that if
      webapp is redeployed the project will be still visible: