open Printf
+let debug = false
+let debug_print s =
+ if debug then prerr_endline ("Helm_registry debugging: " ^ s)
+
exception Malformed_key of string
exception Key_not_found of string
+exception Cyclic_definition of string
exception Type_error of string * string * string (* expected type, value, msg *)
exception Parse_error of string * int * int * string (* file, line, col, msg *)
exception Invalid_value of (string * string) * string (* key, value, descr *)
type validator_id = int
+ (* root XML tag: used by save_to, ignored by load_from *)
+let root_tag = "helm_registry"
+
let get_next_validator_id =
let next_id = ref 0 in
fun () ->
* - no sequences of '_' longer than 1 are permitted
* - no uppercase letter are permitted
*)
-let valid_step_rex_raw = "[a-z0-9]+(_[a-z0-9]+)*"
+let valid_step_rex_raw = "[a-z0-9]+\\(_[a-z0-9]+\\)*"
let valid_key_rex_raw =
- sprintf "%s(\\.%s)*" valid_step_rex_raw valid_step_rex_raw
-let valid_key_rex = Pcre.regexp ("^" ^ valid_key_rex_raw ^ "$")
+ sprintf "%s\(\\.%s\)*" valid_step_rex_raw valid_step_rex_raw
+let valid_key_rex = Str.regexp ("^" ^ valid_key_rex_raw ^ "$")
+let interpolated_key_rex = Str.regexp ("\\$(" ^ valid_key_rex_raw ^ ")")
+let dot_rex = Str.regexp "\\."
+let spaces_rex = Str.regexp "[ \t\n\r]+"
+let heading_spaces_rex = Str.regexp "^[ \t\n\r]+"
+
+let split s =
+ (* trailing blanks are removed per default by split *)
+ Str.split spaces_rex (Str.global_replace heading_spaces_rex "" s)
+let merge l = String.concat " " l
(* escapes for xml configuration file *)
let (escape, unescape) =
Netencoding.Html.decode ~in_enc ~out_enc ~entity_base:`Xml ())
let key_is_valid key =
- if not (Pcre.pmatch ~rex:valid_key_rex key) then
+(* if not (Pcre.pmatch ~rex:valid_key_rex key) then *)
+ if not (Str.string_match valid_key_rex key 0) then
raise (Malformed_key key)
let value_is_valid ~key ~value =
(Hashtbl.find_all validators key)
let set' registry ~key ~value =
+ debug_print (sprintf "Setting %s = %s" key value);
key_is_valid key;
value_is_valid ~key ~value;
Hashtbl.replace registry key value
-let env_var_of_key =
- let dot_RE = Pcre.regexp "\\." in
- fun key ->
- Pcre.replace ~rex:dot_RE ~templ:"__" (String.uppercase key)
+let unset = Hashtbl.remove registry
+
+let env_var_of_key key =
+(* Pcre.replace ~rex:dot_rex ~templ:"__" (String.uppercase key) *)
+ Str.global_replace dot_rex "__" (String.uppercase key)
let get key =
- key_is_valid key;
- let registry_value =
- try
- Some (Hashtbl.find registry key)
- with Not_found -> None
- in
- let env_value =
- try
- Some (Sys.getenv (env_var_of_key key))
- with Not_found -> None
+ let rec aux stack key =
+ key_is_valid key;
+ if List.mem key stack then begin
+ let msg = (String.concat " -> " (List.rev stack)) ^ " -> " ^ key in
+ raise (Cyclic_definition msg)
+ end;
+ let registry_value = (* internal value *)
+ try
+ Some (Hashtbl.find registry key)
+ with Not_found -> None
+ in
+ let env_value = (* environment value *)
+ try
+ Some (Sys.getenv (env_var_of_key key))
+ with Not_found -> None
+ in
+ let value = (* resulting value *)
+ match (registry_value, env_value) with
+ | Some reg, Some env -> env
+ | Some reg, None -> reg
+ | None, Some env -> env
+ | None, None -> raise (Key_not_found key)
+ in
+ interpolate (key :: stack) value
+ and interpolate stack value =
+ Str.global_substitute interpolated_key_rex
+ (fun s ->
+ let matched = Str.matched_string s in
+ (* "$(var)" -> "var" *)
+ let key = String.sub matched 2 (String.length matched - 3) in
+ aux stack key)
+ value
in
- match (registry_value, env_value) with
- | Some reg, Some env -> env
- | Some reg, None -> reg
- | None, Some env -> env
- | None, None -> raise (Key_not_found key)
+ aux [] key
let set = set' registry
-let string_list_of_string s =
- (* trailing blanks are removed per default by Pcre.split *)
- Pcre.split ~pat:"\\s+" (Pcre.replace ~pat:"^\\s+" s)
-let string_of_string_list l = String.concat " " l
-
let mk_get_set type_name (from_string: string -> 'a) (to_string: 'a -> string) =
let getter key =
let value = get key in
let (get_string, set_string) = (get, set)
let (get_int, set_int) = mk_get_set "int" int_of_string string_of_int
let (get_float, set_float) = mk_get_set "float" float_of_string string_of_float
-let (get_string_list, set_string_list) =
- mk_get_set "string list" string_list_of_string string_of_string_list
+let (get_bool, set_bool) = mk_get_set "bool" bool_of_string string_of_bool
+let (get_string_list, set_string_list) = mk_get_set "string list" split merge
-let save_to fname =
- let oc = open_out fname in
- output_string oc "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
- output_string oc "<helm_registry>\n";
+let get_opt getter key =
try
- Hashtbl.iter
- (fun key value ->
- fprintf oc " <value key=\"%s\">%s</value>\n" key (escape value))
- registry;
- output_string oc "</helm_registry>";
- close_out oc
- with e ->
- close_out oc;
- raise e
+ Some (getter key)
+ with Key_not_found _ -> None
+let set_opt setter ~key ~value =
+ match value with
+ | None -> unset key
+ | Some value -> setter ~key ~value
+let get_opt_default getter default key =
+ match get_opt getter key with
+ | None -> default
+ | Some v -> v
let add_validator ~key ~validator ~descr =
let id = get_next_validator_id () in
Hashtbl.add validators key (validator, descr);
id
+open Pxp_dtd
open Pxp_document
open Pxp_types
open Pxp_yacc
-let load_from =
- let config = default_config in
+let save_to =
+ let dtd = new dtd PxpHelmConf.pxp_config.warner `Enc_utf8 in
+ let dot_RE = Str.regexp "\\." in
+ let create_key_node key value = (* create a <key name="foo">value</key> *)
+ let element =
+ create_element_node ~valcheck:false PxpHelmConf.pxp_spec dtd "key" ["name", key]
+ in
+ let data = create_data_node PxpHelmConf.pxp_spec dtd value in
+ element#append_node data;
+ element
+ in
+ let is_section name =
+ fun node ->
+ match node#node_type with
+ | T_element "section" ->
+ (try node#attribute "name" = Value name with Not_found -> false)
+ | _ -> false
+ in
+ let add_key_node root sections key value =
+ let rec aux node = function
+ | [] ->
+ let key_node = create_key_node key value in
+ node#append_node key_node
+ | section :: tl ->
+ let next_node =
+ try
+ find ~deeply:false (is_section section) node
+ with Not_found ->
+ let section_node =
+ create_element_node ~valcheck:false PxpHelmConf.pxp_spec dtd
+ "section" ["name", section]
+ in
+ node#append_node section_node;
+ section_node
+ in
+ aux next_node tl
+ in
+ aux root sections
+ in
+ fun fname ->
+ let xml_root =
+ create_element_node ~valcheck:false PxpHelmConf.pxp_spec dtd "helm_registry" []
+ in
+ Hashtbl.iter
+ (fun key value ->
+ let sections, key =
+ let hd, tl =
+ match List.rev (Str.split dot_RE key) with
+ | hd :: tl -> hd, tl
+ | _ -> assert false
+ in
+ List.rev tl, hd
+ in
+ add_key_node xml_root sections key value)
+ registry;
+ let outchan = (* let's write xml output to fname *)
+ if Unix.system "xmllint --version &> /dev/null" = Unix.WEXITED 0 then
+ (* xmllint available, use it! *)
+ Unix.open_process_out (sprintf
+ "xmllint --format --encode utf8 -o '%s' -" fname)
+ else
+ (* xmllint not available, write pxp ugly output directly to fname *)
+ open_out fname
+ in
+ xml_root#write (`Out_channel outchan) `Enc_utf8;
+ close_out outchan
+
+let load_from_absolute =
+ let config = PxpHelmConf.pxp_config in
let entry = `Entry_document [ `Extend_dtd_fully; `Parse_xml_decl ] in
+ let fold_key key_stack key =
+ match key_stack with
+ | [] -> key
+ | _ -> String.concat "." key_stack ^ "." ^ key
+ in
fun fname ->
+ debug_print ("Loading configuration from " ^ fname);
let document =
- parse_wfdocument_entity config (from_file fname) default_spec
+ parse_wfdocument_entity config (from_file fname) PxpHelmConf.pxp_spec
in
- let fill_registry () =
- document#root#iter_nodes (fun n ->
+ let rec aux key_stack node =
+ node#iter_nodes (fun n ->
try
(match n#node_type with
- | T_element "value" ->
- let key = n#required_string_attribute "key" in
+ | T_element "section" ->
+ let section = n#required_string_attribute "name" in
+ aux (key_stack @ [section]) n
+ | T_element "key" ->
+ let key = n#required_string_attribute "name" in
let value = n#data in
- set ~key ~value
+ set ~key:(fold_key key_stack key) ~value
| _ -> ())
with exn ->
let (fname, line, pos) = n#position in
let backup = backup_registry () in
Hashtbl.clear registry;
try
- fill_registry ()
+ aux [] document#root
with exn ->
restore_registry backup;
raise exn
+let load_from ?path fname =
+ if Filename.is_relative fname then begin
+ let no_file_found = ref true in
+ let path =
+ match path with
+ | Some path -> path (* path given as argument *)
+ | None -> [ Sys.getcwd () ] (* no path given, try with cwd *)
+ in
+ List.iter
+ (fun dir ->
+ let conffile = dir ^ "/" ^ fname in
+ if Sys.file_exists conffile then begin
+ no_file_found := false;
+ load_from_absolute conffile
+ end)
+ path;
+ if !no_file_found then
+ failwith (sprintf
+ "Helm_registry.init: no configuration file named %s in [ %s ]"
+ fname (String.concat "; " path))
+ end else
+ load_from_absolute fname
+
(* DEBUGGING ONLY *)
let dump () = Hashtbl.iter (fun k v -> printf "%s = %s\n" k v) registry
projects / helm.git / blobdiff