Initial revision

[helm.git] / helm / interface / configuration.ml.in

diff --git a/helm/interface/configuration.ml.in b/helm/interface/configuration.ml.in
index d78e0b36101a9f0e19bd624e5236576714c05aaf..d20a3c0c0e0cf872dcb42de6cd4ccdbacad15803 100644 (file)
--- a/helm/interface/configuration.ml.in
+++ b/helm/interface/configuration.ml.in
@@ -9,6 +9,8 @@
 (*                                                                            *)
 (******************************************************************************)
 
+exception MalformedDir of string
+
 (* this should be the only hard coded constant *)
 let filename =
  let prefix =
@@ -17,6 +19,8 @@ let filename =
   with
    Not_found -> "@HELM_CONFIGURATION_DIR@"
  in
+  if prefix.[(String.length prefix) - 1] = '/' then
+   raise (MalformedDir prefix) ;
   prefix ^ "/configuration.xml";;
 
 exception Warnings;;
@@ -72,14 +76,42 @@ let _ =
   ((xml_document ())#root#sub_nodes)
 ;;
 
-let helm_dir      = Hashtbl.find vars "helm_dir";;
-let dtd_dir       = Hashtbl.find vars "dtd_dir";;
-let servers_file  = Hashtbl.find vars "servers_file";;
-let uris_dbm      = Hashtbl.find vars "uris_dbm";;
-let dest          = Hashtbl.find vars "dest";;
-let indexname     = Hashtbl.find vars "indexname";;
-let tmpdir        = Hashtbl.find vars "tmpdir";;
-let helm_dir      = Hashtbl.find vars "helm_dir";;
-let getter_url    = Hashtbl.find vars "getter_url";;
+(* try to read a configuration variable, given its name into the
+ * configuration.xml file and its name into the shell environment.
+ * The shell variable, if present, has precedence over configuration.xml
+ *)
+let read_configuration_var_env xml_name env_name =
+ try
+  try
+   Sys.getenv env_name
+  with
+   Not_found -> Hashtbl.find vars xml_name
+ with
+  Not_found ->
+   Printf.printf "Sorry, cannot find variable `%s', please check your configuration\n" xml_name ;
+   flush stdout ;
+   raise Not_found
+
+let read_configuration_var xml_name =
+ try
+  Hashtbl.find vars xml_name
+ with
+  Not_found ->
+   Printf.printf "Sorry, cannot find variable `%s', please check your configuration\n" xml_name ;
+   flush stdout ;
+   raise Not_found
+
+let helm_dir      = read_configuration_var     "helm_dir";;
+let dtd_dir       = read_configuration_var     "dtd_dir";;
+let style_dir     = read_configuration_var_env "style_dir" "HELM_STYLE_DIR";;
+let servers_file  = read_configuration_var     "servers_file";;
+let uris_dbm      = read_configuration_var     "uris_dbm";;
+let dest          = read_configuration_var     "dest";;
+let indexname     = read_configuration_var     "indexname";;
+let tmp_dir       = read_configuration_var     "tmp_dir"
+let helm_dir      = read_configuration_var     "helm_dir";;
+let getter_url    = read_configuration_var_env "getter_url" "HELM_GETTER_URL";;
+let processor_url = read_configuration_var_env "processor_url" "HELM_PROCESSOR_URL";;
 
 let _ = Hashtbl.clear vars;;
+