[manual] list all supported options in `infer --help` and `infer --help-full`

Summary: It's useful to have all the options in a single man page for discoverability.

Reviewed By: mbouaziz

Differential Revision: D5028007

fbshipit-source-id: 37f8d2e

infer/src/base/CommandDoc.ml

@@ -38,7 +38,7 @@ let mk_command_doc ~see_also:see_also_commands ?and_also ?environment:environmen
     let exe_names = List.map see_also_commands ~f:(fun cmd ->
         let exe = exe_name_of_command cmd in
         Printf.sprintf "$(b,%s)(%d)" (Cmdliner.Manpage.escape exe) section) in
-    let suffix = match and_also with None -> "" | Some msg -> " " ^ msg in
+    let suffix = Option.value ~default:"" and_also in
     [`P (String.concat ~sep:", " exe_names ^ suffix)] in
   let environment = Option.value environment_opt
       ~default:[`I (Printf.sprintf "$(b,%s), $(b,%s), $(b,%s)"
@@ -94,8 +94,9 @@ let clang =
     ~synopsis:"$(b,InferClang) $(i,[clang options])"
     ~description:[`P "This is used internally by other infer commands. You shouldn't need to call \
                       this directly."]
-    ~options:[`P "Accepts the same command line options as $(b,clang)(1) (but still reads infer \
-                  options from the environment)."]
+    ~options:(`Replace
+                [`P "Accepts the same command line options as $(b,clang)(1) (but still reads infer \
+                     options from the environment)."])
     ~see_also:CLOpt.[Capture]
 
 let compile =
@@ -148,11 +149,10 @@ let infer = mk_command_doc ~title:"Infer Static Analyzer"
       `P "Infer consists of a collection of tools referenced in the $(i,SEE ALSO) section of this \
           manual. See their respective manuals for more information about each.";
     ]
-    ~options:[
+    ~options:(`Prepend [
         `P "If a compilation command is specified via the $(b,--) option or one of the \
             $(b,--clang-compilation-database[-escaped]) options, $(b,infer) behaves as \
             $(b,infer-run)(1). Otherwise, $(b,infer) behaves as $(b,infer-analyze)(1).";
-      `P "See the manuals of individual infer commands for details about their supported options.";
         `P "Every infer command accepts the arguments from all the other infer commands. The same \
             option may affect and thus be list in the manual of several commands.";
         `P (Printf.sprintf
@@ -165,7 +165,10 @@ let infer = mk_command_doc ~title:"Infer Static Analyzer"
               inferconfig_file
               CLOpt.args_env_var Cmdliner.Manpage.s_environment Cmdliner.Manpage.s_files
            );
-    ]
+        `P "See the manuals of individual infer commands for details about their supported \
+            options. The following is a list of all the supported options (see also \
+            $(b,--help-full) for options reserved for internal use).";
+      ])
     ~environment:[
       `P (Printf.sprintf
             "Extra arguments may be passed to all infer commands using the $(b,%s) \

infer/src/base/CommandLineOption.ml

@@ -82,9 +82,12 @@ let all_commands = [
 
 type command_doc = {
   title : Cmdliner.Manpage.title;
-  manual_pre_options : Cmdliner.Manpage.block list;
-  manual_options : Cmdliner.Manpage.block list option;
-  manual_post_options : Cmdliner.Manpage.block list;
+  manual_before_options : Cmdliner.Manpage.block list;
+  manual_options : [
+    | `Prepend of Cmdliner.Manpage.block list
+    | `Replace of Cmdliner.Manpage.block list
+  ];
+  manual_after_options : Cmdliner.Manpage.block list;
 }
 
 type desc = {
@@ -158,6 +161,7 @@ module SectionMap = Caml.Map.Make (struct
 
 let help_sections_desc_lists =
   List.map all_commands ~f:(fun command -> (command, ref SectionMap.empty))
+let visible_descs_list = ref []
 let hidden_descs_list = ref []
 
 (** add [desc] to the one relevant parse_tag_desc_lists for the purposes of parsing, and, in the
@@ -173,7 +177,9 @@ let add parse_mode sections desc =
     sections := SectionMap.add section (desc::prev_contents) !sections in
   List.iter sections ~f:add_to_section;
   if List.is_empty sections then
-    hidden_descs_list := desc :: !hidden_descs_list;
+    hidden_descs_list := desc :: !hidden_descs_list
+  else
+    visible_descs_list := desc :: !visible_descs_list;
   ()
 
 let deprecate_desc parse_mode ~long ~short ~deprecated desc =
@@ -516,7 +522,7 @@ let mk_command_doc ~title ~section ~version ~date ~short_description ~synopsis ~
   let add_if section blocks = match blocks with
     | None -> `Blocks []
     | Some bs -> `Blocks (`S section :: bs) in
-  let manual_pre_options = [
+  let manual_before_options = [
     `S Cmdliner.Manpage.s_name;
     (* the format of the following line is mandated by man(7) *)
     `Pre (Printf.sprintf "%s - %s" command_str short_description);
@@ -525,7 +531,8 @@ let mk_command_doc ~title ~section ~version ~date ~short_description ~synopsis ~
     `S Cmdliner.Manpage.s_description;
     `Blocks description;
   ] in
-  let manual_post_options = [
+  let manual_options = Option.value ~default:(`Prepend []) options in
+  let manual_after_options = [
     add_if Cmdliner.Manpage.s_exit_status exit_status;
     add_if Cmdliner.Manpage.s_environment environment;
     add_if Cmdliner.Manpage.s_files files;
@@ -537,7 +544,7 @@ let mk_command_doc ~title ~section ~version ~date ~short_description ~synopsis ~
   ] in
   let command_doc = {
     title = command_str, section, date, version, title;
-    manual_pre_options; manual_options = options; manual_post_options;
+    manual_before_options; manual_options; manual_after_options;
   } in
   command_doc
 
@@ -845,13 +852,10 @@ let show_manual ?internal_section format default_doc command_opt =
           doc_first_line)
       :: List.concat_map (List.concat_map ~f:(wrap_line indent_string width) doc_other_lines)
         ~f:(fun s -> [`Noblank; `Pre s]) in
-  let option_blocks = match command_doc.manual_options, command_opt with
-    | None, None ->
-        failwithf "Cannot create %s section" Cmdliner.Manpage.s_options
-    | Some blocks, _ ->
+  let option_blocks = match command_doc.manual_options with
+    | `Replace blocks ->
         `S Cmdliner.Manpage.s_options :: blocks
-    | None, Some command ->
-        let sections = List.Assoc.find_exn help_sections_desc_lists command in
+    | `Prepend blocks ->
         let hidden =
           match internal_section with
           | Some section ->
@@ -859,11 +863,19 @@ let show_manual ?internal_section format default_doc command_opt =
               :: List.concat_map ~f:block_of_desc (normalize_desc_list !hidden_descs_list)
           | None ->
               [] in
+        match command_opt with
+        | Some command ->
+            let sections = List.Assoc.find_exn help_sections_desc_lists command in
             SectionMap.fold (fun section descs result ->
                 `S section ::
+                (if String.equal section Cmdliner.Manpage.s_options then blocks else []) @
                 List.concat_map ~f:block_of_desc (normalize_desc_list descs) @ result)
-          !sections hidden in
-  let blocks = [`Blocks command_doc.manual_pre_options; `Blocks option_blocks;
-                `Blocks command_doc.manual_post_options] in
+              !sections hidden
+        | None ->
+            `S Cmdliner.Manpage.s_options :: blocks @
+            List.concat_map ~f:block_of_desc (normalize_desc_list !visible_descs_list) @
+            hidden in
+  let blocks = [`Blocks command_doc.manual_before_options; `Blocks option_blocks;
+                `Blocks command_doc.manual_after_options] in
   Cmdliner.Manpage.print format Format.std_formatter (command_doc.title, blocks);
   ()

infer/src/base/CommandLineOption.mli

@@ -167,15 +167,16 @@ type command_doc
     - [version] is the version string of the command
     - [date] is the date of the last modification of the manual
     - [short_description] is a one-line description of the command
-    - [options] if specified, will populate the OPTIONS section; otherwise, the options are taken
-    from the command's
+    - [options] can be either [`Replace blocks], which populates the OPTIONS section with [blocks],
+    or [`Prepend blocks], in which case the options from the command are used, prepended by
+    [blocks]. If unspecified it defaults to [`Prepend []].
     - All the other [section_name] options correspond to the contents of the section [section_name].
     Some are mandatory and some are not.
 *)
 val mk_command_doc : title:string -> section:int -> version:string -> date:string ->
   short_description:string -> synopsis:Cmdliner.Manpage.block list ->
   description:Cmdliner.Manpage.block list ->
-  ?options:Cmdliner.Manpage.block list ->
+  ?options:[`Prepend of Cmdliner.Manpage.block list | `Replace of Cmdliner.Manpage.block list] ->
   ?exit_status:Cmdliner.Manpage.block list ->
   ?environment:Cmdliner.Manpage.block list ->
   ?files:Cmdliner.Manpage.block list ->

infer/src/base/Config.ml

@@ -480,8 +480,7 @@ and (
       ~suffix:"blacklist-path-regex"
       ~deprecated_suffix:["blacklist"]
       ~help:"blacklist the analysis of files whose relative path matches the specified OCaml-style \
-             regex\n\
-             (to whitelist: $(b,--<analyzer>-whitelist-path-regex))"
+             regex (to whitelist: $(b,--<analyzer>-whitelist-path-regex))"
       ~meta:"path regex",
     mk_filtering_options
       ~suffix:"whitelist-path-regex"