Add global jsx pragma

src/commands/commandUtils.ml

@@ -1100,6 +1100,7 @@ let make_options ~flowconfig_name ~flowconfig ~lazy_mode ~root (options_flags: O
     opt_recursion_limit = FlowConfig.recursion_limit flowconfig;
     opt_max_files_checked_per_worker = FlowConfig.max_files_checked_per_worker flowconfig;
     opt_type_asserts = FlowConfig.type_asserts flowconfig;
+    opt_jsx_pragma = FlowConfig.jsx_pragma flowconfig;
   }
 
 let make_env flowconfig_name connect_flags root =

src/commands/config/flowConfig.ml

@@ -101,6 +101,7 @@ module Opts = struct
     types_first: bool;
     wait_for_recheck: bool;
     weak: bool;
+    jsx_pragma: string option;
   }
 
   let warn_on_unknown_opts (raw_opts, config) : (t * warning list, error) result =
@@ -192,6 +193,7 @@ module Opts = struct
     types_first = false;
     wait_for_recheck = false;
     weak = false;
+    jsx_pragma = None;
   }
 
   let parse_lines : line list -> (raw_options, error) result =
@@ -634,6 +636,9 @@ module Opts = struct
 
     "experimental.types_first.max_files_checked_per_worker",
       uint (fun opts v -> Ok { opts with max_files_checked_per_worker = v });
+
+    "jsx.pragma",
+      string (fun opts v -> Ok { opts with jsx_pragma = Some v });
   ]
 
   let parse =
@@ -1070,6 +1075,7 @@ let traces c = c.options.Opts.traces
 let trust_mode c = c.options.Opts.trust_mode
 let type_asserts c = c.options.Opts.type_asserts
 let types_first c = c.options.Opts.types_first
+let jsx_pragma c = c.options.Opts.jsx_pragma
 let required_version c = c.version
 let wait_for_recheck c = c.options.Opts.wait_for_recheck
 let weak c = c.options.Opts.weak

src/commands/config/flowConfig.mli

@@ -95,6 +95,7 @@ val traces: config -> int
 val trust_mode: config -> Options.trust_mode
 val type_asserts: config -> bool
 val types_first: config -> bool
+val jsx_pragma: config -> string option
 val wait_for_recheck: config -> bool
 val weak: config -> bool
 

src/common/options.ml

@@ -117,6 +117,7 @@ type t = {
   opt_include_suppressions : bool;
   opt_trust_mode: trust_mode;
   opt_type_asserts: bool;
+  opt_jsx_pragma: string option;
 }
 
 let all opts = opts.opt_all
@@ -182,6 +183,7 @@ let strict_mode opts = opts.opt_strict_mode
 
 let trust_mode opts = opts.opt_trust_mode
 let type_asserts opts = opts.opt_type_asserts
+let jsx_pragma opts = opts.opt_jsx_pragma
 
 
 let lazy_mode_to_string lazy_mode =

src/parsing/parsing_service_js.ml

@@ -472,7 +472,7 @@ let does_content_match_file_hash ~reader file content =
  * Add success/error info to passed accumulator. *)
 let reducer
   ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch
-  ~max_header_tokens ~noflow ~parse_unchanged
+  ~max_header_tokens ~noflow ~jsx_pragma ~parse_unchanged
   parse_results file
 : results =
   (* It turns out that sometimes files appear and disappear very quickly. Just
@@ -525,6 +525,13 @@ let reducer
             if noflow file then { info with Docblock.flow = Some Docblock.OptOut }
             else info
           in
+          let info = match jsx_pragma with
+          | Some jsx_pragma ->
+            let padding = (String.make 1 '\n') ^ (String.make 1 ' ') in
+            let (jsx_expr, _) = Parser_flow.jsx_pragma_expression (padding ^ jsx_pragma) (Some file) in
+            { info with Docblock.jsx = Some (Docblock.Jsx_pragma (jsx_pragma, jsx_expr)) }
+          | None -> info
+          in
           begin match (do_parse ~parse_options ~info content file) with
           | Parse_ok parse_ok ->
               let ast, file_sig = basic parse_ok in
@@ -602,13 +609,13 @@ let next_of_filename_set ?(with_progress=false) workers filenames =
   else MultiWorkerLwt.next workers (FilenameSet.elements filenames)
 
 let parse ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch ~profile
-  ~max_header_tokens ~noflow ~parse_unchanged workers next
+  ~max_header_tokens ~noflow ~jsx_pragma ~parse_unchanged workers next
 : results Lwt.t =
   let t = Unix.gettimeofday () in
   let reducer =
     reducer
       ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch
-      ~max_header_tokens ~noflow ~parse_unchanged
+      ~max_header_tokens ~noflow ~jsx_pragma ~parse_unchanged
   in
   let%lwt results = MultiWorkerLwt.call
     workers
@@ -632,15 +639,15 @@ let parse ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch ~profile
   Lwt.return results
 
 let reparse
-  ~transaction ~reader ~parse_options ~profile ~max_header_tokens ~noflow
+  ~transaction ~reader ~parse_options ~profile ~max_header_tokens ~noflow ~jsx_pragma
   ~parse_unchanged ~with_progress ~workers ~modified:files ~deleted =
   (* save old parsing info for files *)
   let all_files = FilenameSet.union files deleted in
   let master_mutator, worker_mutator = Parsing_heaps.Reparse_mutator.create transaction all_files in
   let next = next_of_filename_set ?with_progress workers files in
   let%lwt results =
     parse ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch:false ~profile
-      ~max_header_tokens ~noflow ~parse_unchanged workers next
+      ~max_header_tokens ~noflow ~jsx_pragma ~parse_unchanged workers next
   in
   let modified = results.parse_ok |> FilenameMap.keys |> FilenameSet.of_list in
   let modified = List.fold_left (fun acc (fail, _, _) ->
@@ -664,6 +671,7 @@ let parse_with_defaults ?types_mode ?use_strict ~reader options workers next =
   let facebook_fbt = Options.facebook_fbt options in
   let arch = Options.arch options in
   let abstract_locations = options.Options.opt_abstract_locations in
+  let jsx_pragma = Options.jsx_pragma options in
   let parse_options  =
     make_parse_options ~arch ~abstract_locations ~types_mode ~use_strict ~module_ref_prefix
         ~facebook_fbt ()
@@ -673,7 +681,7 @@ let parse_with_defaults ?types_mode ?use_strict ~reader options workers next =
   let worker_mutator = Parsing_heaps.Parse_mutator.create () in
   parse
     ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch:false
-    ~profile ~max_header_tokens ~noflow ~parse_unchanged workers next
+    ~profile ~max_header_tokens ~noflow ~jsx_pragma ~parse_unchanged workers next
 
 let reparse_with_defaults
   ~transaction ~reader ?types_mode ?use_strict ?with_progress
@@ -686,12 +694,13 @@ let reparse_with_defaults
   let facebook_fbt = Options.facebook_fbt options in
   let arch = Options.arch options in
   let abstract_locations = options.Options.opt_abstract_locations in
+  let jsx_pragma = Options.jsx_pragma options in
   let parse_options  =
     make_parse_options ~arch ~abstract_locations ~types_mode ~use_strict ~module_ref_prefix
         ~facebook_fbt ()
   in
   reparse
-    ~transaction ~reader ~parse_options ~profile ~max_header_tokens ~noflow
+    ~transaction ~reader ~parse_options ~profile ~max_header_tokens ~noflow ~jsx_pragma
     ~parse_unchanged ~with_progress ~workers ~modified ~deleted
 
 (* ensure_parsed takes a set of files, finds the files which haven't been parsed, and parses them.
@@ -730,6 +739,7 @@ let ensure_parsed ~reader options workers files =
   let facebook_fbt = Options.facebook_fbt options in
   let arch = Options.arch options in
   let abstract_locations = options.Options.opt_abstract_locations in
+  let jsx_pragma = Options.jsx_pragma options in
 
   let parse_options =
     make_parse_options ~types_mode ~use_strict ~module_ref_prefix ~facebook_fbt ~arch
@@ -738,7 +748,7 @@ let ensure_parsed ~reader options workers files =
 
   let%lwt results = parse
     ~worker_mutator ~reader ~parse_options ~skip_hash_mismatch:true
-    ~profile ~max_header_tokens ~noflow ~parse_unchanged workers next
+    ~profile ~max_header_tokens ~noflow ~jsx_pragma ~parse_unchanged workers next
   in
 
   Lwt.return results.parse_hash_mismatch_skips

tests/jsx_pragma_option/.flowconfig

@@ -0,0 +1,2 @@
+[options]
+jsx.pragma=bar

tests/jsx_pragma_option/index.js

@@ -0,0 +1,10 @@
+//@flow
+
+import { bar } from './jsx'
+
+
+// ok
+const Hello = <hello a="nice" />;
+
+// error
+const Bye = <a />;

tests/jsx_pragma_option/jsx.js

@@ -0,0 +1,5 @@
+//@flow
+
+declare export var bar: {
+  (type: 'hello', props: {|a: string|}, children: any): {| hello: 'div' |}
+}

tests/jsx_pragma_option/jsx_pragma_option.exp

@@ -0,0 +1,24 @@
+Error --------------------------------------------------------------------------------------------------- index.js:10:13
+
+Cannot create `a` element because:
+ - `a` [1] is incompatible with string literal `hello` [2].
+ - inexact null [3] is incompatible with exact object type [4].
+
+   index.js:10:13
+   10| const Bye = <a />;
+                   ^^^^^ [3]
+
+References:
+   index.js:10:14
+   10| const Bye = <a />;
+                    ^ [1]
+   jsx.js:4:10
+    4|   (type: 'hello', props: {|a: string|}, children: any): {| hello: 'div' |}
+                ^^^^^^^ [2]
+   jsx.js:4:26
+    4|   (type: 'hello', props: {|a: string|}, children: any): {| hello: 'div' |}
+                                ^^^^^^^^^^^^^ [4]
+
+
+
+Found 2 errors