Clean up command line argument filtering.

infer/src/backend/utils.ml

@@ -787,6 +787,12 @@ let filename_to_relative root fname =
   remainder
 
 
+(* Type of command-line arguments before processing *)
+type arg_list = (string * Arg.spec * string option * string) list
+
+let arg_desc_filter options_to_keep =
+  list_filter (function (option_name, _, _, _) -> list_mem string_equal option_name options_to_keep)
+
 let base_arg_desc =
   [
     "-results_dir",

infer/src/backend/utils.mli

@@ -388,11 +388,17 @@ val do_outf : outfile option ref -> (outfile -> unit) -> unit
 (** close an outfile *)
 val close_outf : outfile -> unit
 
+(* Type of command-line arguments before processing *)
+type arg_list = (string * Arg.spec * string option * string) list
+
+(* Filter arguments by name, i.e. keep those whose name appears in the name list *)
+val arg_desc_filter : string list -> arg_list -> arg_list
+
 (** Basic command-line arguments *)
-val base_arg_desc : (string * Arg.spec * string option * string) list
+val base_arg_desc : arg_list
 
 (** Reserved command-line arguments *)
-val reserved_arg_desc : (string * Arg.spec * string option * string) list
+val reserved_arg_desc : arg_list
 
 (** Escape a string for use in a CSV or XML file: replace reserved characters with escape sequences *)
 module Escape : sig

infer/src/clang/cMain.ml

@@ -16,13 +16,9 @@ module L = Logging
 open CFrontend_utils
 
 let arg_desc =
-  let base_arg =
-    let options_to_keep = ["-results_dir"] in
   Config.dotty_cfg_libs := false; (* default behavior for this frontend *)
-    let filter arg_desc =
-      List.filter (fun desc -> let (option_name, _, _, _) = desc in List.mem option_name options_to_keep) arg_desc in
   let desc =
-      (filter Utils.base_arg_desc) @
+    (Utils.arg_desc_filter ["-results_dir"] Utils.base_arg_desc) @
     [
       "-c",
       Arg.String (fun cfile -> CFrontend_config.source_file := Some cfile),
@@ -74,8 +70,7 @@ let arg_desc =
       None,
       "Mode for computing the models";
     ] in
-    Utils.Arg2.create_options_desc false "Parsing Options" desc in
+  Utils.Arg2.create_options_desc false "Parsing Options" desc
-  base_arg
 
 let usage =
   "\nUsage: InferClang -c C Files -ast AST Files -results_dir <output-dir> [options] \n"

infer/src/java/jMain.ml

@@ -14,12 +14,9 @@ module L = Logging
 open Utils
 
 let arg_desc =
-  let base_arg =
   let options_to_keep = ["-results_dir"; "-project_root"] in
-    let filter arg_desc =
-      list_filter (fun desc -> let (option_name, _, _, _) = desc in list_mem string_equal option_name options_to_keep) arg_desc in
   let desc =
-      (filter base_arg_desc) @
+    (arg_desc_filter options_to_keep base_arg_desc) @
     [
       "-models", Arg.String (fun filename -> JClasspath.add_models filename), Some "paths", "set the path to the jar containing the models";
       "-debug", Arg.Unit (fun () -> JConfig.debug_mode := true), None, "write extra translation information";
@@ -30,8 +27,7 @@ let arg_desc =
       "-verbose_out", Arg.String (fun path -> JClasspath.set_verbose_out path), None,
       "Set the path to the javac verbose output"
     ] in
-    Arg2.create_options_desc false "Parsing Options" desc in
+  Arg2.create_options_desc false "Parsing Options" desc
-  base_arg
 
 let usage =
   "Usage: InferJava -d compilation_dir -sources filename\n"

infer/src/llvm/lMain.ml

@@ -10,11 +10,8 @@ open Utils
 
 let arg_desc =
   let options_to_keep = ["-results_dir"; "-project_root"] in
-  let filter arg_desc = list_filter
-      (fun desc -> let (option_name, _, _, _) = desc in list_mem string_equal option_name options_to_keep)
-      arg_desc in
   let desc =
-    filter base_arg_desc @
+    arg_desc_filter options_to_keep base_arg_desc @
     [
       "-c",
       Arg.String (fun cfile -> LConfig.source_filename := Some cfile),