Remove the fmt job when .ocamlformat analysis fails

lib/analyse.ml

@@ -292,16 +292,9 @@ module Analysis = struct
       find_opam_repo_commit_for_ocamlformat ~solve
         ~platforms:(filter_linux_x86_64_platforms platforms)
     in
-    let analysed_ocamlformat =
-      Analyse_ocamlformat.get_ocamlformat_source job ~opam_files ~root
-        ~find_opam_repo_commit
-      >>= function
-      | Error (`Msg msg) ->
-          Current.Job.log job "%s@." msg;
-          Lwt_result.return (None, None)
-      | Ok x -> Lwt_result.return x
-    in
-    analysed_ocamlformat >>!= fun (ocamlformat_source, ocamlformat_selection) ->
+    Analyse_ocamlformat.get_ocamlformat_source job ~opam_files ~root
+      ~find_opam_repo_commit
+    >>!= fun (ocamlformat_source, ocamlformat_selection) ->
     if opam_files = [] then Lwt_result.fail (`Msg "No opam files found!")
     else if List.filter Fpath.is_seg opam_files = [] then
       Lwt_result.fail (`Msg "No top-level opam files found!")

lib/analyse_ocamlformat.ml

@@ -1,7 +1,7 @@
 let ( >>!= ) = Lwt_result.Infix.( >>= )
 
 type source =
-  | Opam of { version : string; opam_repo_commit : string }
+  | Opam of { version : string; opam_repo_commit : string option }
   | Vendored of { path : string }
 [@@deriving yojson, eq, ord]
 
@@ -74,6 +74,7 @@ let ocamlformat_version_from_file ~root job path =
         Lwt.return (Error (`Msg "Multiple 'version=' lines in .ocamlformat"))
 
 let get_ocamlformat_source job ~opam_files ~root ~find_opam_repo_commit =
+  let open Lwt.Infix in
   let ( let* ) = Lwt_result.Infix.( >>= ) in
   let proj_is_ocamlformat p =
     String.equal (Filename.basename p) "ocamlformat.opam"
@@ -88,14 +89,14 @@ let get_ocamlformat_source job ~opam_files ~root ~find_opam_repo_commit =
           Fpath.(to_string (root / ".ocamlformat"))
       in
       match version_in_dot_ocamlformat with
-      | None ->
-          Lwt_result.return (None, None)
-          (* This case happens when the ocamlformat file doesn't specify a version.
-             It will try to get the latest version for the last platform. *)
-      | Some version ->
-          let* opam_repo_commit, ocamlformat_selection =
-            find_opam_repo_commit version
-          in
-          Lwt_result.return
-            ( Some (Opam { version; opam_repo_commit }),
-              Some ocamlformat_selection ))
+      | None -> Lwt_result.return (None, None)
+      | Some version -> (
+          find_opam_repo_commit version >>= function
+          | Error (`Msg msg) ->
+              Current.Job.log job "%s@." msg;
+              Lwt_result.return
+                (Some (Opam { version; opam_repo_commit = None }), None)
+          | Ok (x, ocamlformat_selection) ->
+              Lwt_result.return
+                ( Some (Opam { version; opam_repo_commit = Some x }),
+                  Some ocamlformat_selection )))

lib/analyse_ocamlformat.mli

@@ -1,7 +1,7 @@
 (** Detect the required version of OCamlFormat used in a source repository. *)
 
 type source =
-  | Opam of { version : string; opam_repo_commit : string }
+  | Opam of { version : string; opam_repo_commit : string option }
       (** Should install OCamlFormat from opam. *)
   | Vendored of { path : string }
       (** OCamlFormat is vendored. [path] is relative to the project's root. *)

lib/lint.ml

@@ -27,7 +27,7 @@ let commit_from_ocamlformat_source ocamlformat_source =
   let open Analyse_ocamlformat in
   match ocamlformat_source with
   | None | Some (Vendored _) -> None
-  | Some (Opam { opam_repo_commit; _ }) -> Some opam_repo_commit
+  | Some (Opam { opam_repo_commit; _ }) -> opam_repo_commit
 
 let fmt_spec ~base ~ocamlformat_source ~selection =
   let open Obuilder_spec in

lib/spec.ml

@@ -42,9 +42,21 @@ let lint_specs ~analysis selections =
   let lint_fmt =
     (* Allow fallback if an ocamlformat selection doesn't exist,
        as [dune build @fmt] can also format dune files *)
-    match Analyse.Analysis.ocamlformat_selection analysis with
-    | None -> lint_doc
-    | Some spec -> spec
+    (* match Analyse.Analysis.ocamlformat_selection analysis with *)
+    let selection =
+      let ocamlformat_selection =
+        Analyse.Analysis.ocamlformat_selection analysis
+      in
+      let ocamlformat_source = Analyse.Analysis.ocamlformat_source analysis in
+      match (ocamlformat_selection, ocamlformat_source) with
+      | _, None -> Some lint_doc
+      | Some _, Some _ -> ocamlformat_selection
+      | None, Some _ -> None
+    in
+    match selection with
+    | None -> []
+    | Some selection ->
+        [ opam ~label:Variant.fmt_label ~selection ~analysis (`Lint `Fmt) ]
   in
   let lint_opam =
     (* Take the first selection with an OCaml version >= 4.14.0,
@@ -62,10 +74,8 @@ let lint_specs ~analysis selections =
       selection
     |> Option.value ~default:[]
   in
-  [
-    opam ~label:Variant.fmt_label ~selection:lint_fmt ~analysis (`Lint `Fmt);
-    opam ~label:Variant.doc_label ~selection:lint_doc ~analysis (`Lint `Doc);
-  ]
+  lint_fmt
+  @ [ opam ~label:Variant.doc_label ~selection:lint_doc ~analysis (`Lint `Doc) ]
   @ optional_spec ~label:Variant.opam_label ~selection:lint_opam ~lint_ty:`Opam
 
 let opam_monorepo builds =