Flycheck verify (WIP)

flycheck-fsharp.el

@@ -37,6 +37,34 @@
 (defun flycheck-fsharp--can-make-request-p ()
   (fsharp-ac-can-make-request t))
 
+(defun flycheck-verify-fsautocomlete (_checker)
+  "Verify the F# syntax checker."
+  (let* ((host (fsharp-ac--hostname (buffer-file-name)))
+	 (process (fsharp-ac-completion-process host))
+	 (status (when process (process-status process)))
+	 (project-file (when (eq status 'run) (fsharp-ac--in-project-p (buffer-file-name))))
+	 (projects (when (eq status 'run) (hash-table-keys  fsharp-ac--project-data)))
+	 (command (when process (combine-and-quote-strings (process-command process)))))
+    (cons
+     (flycheck-verification-result-new
+      :label "FSharp.AutoComplete process"
+      :message (cond
+		((eq status 'run) command)
+		(status (format "Invalid process status: %s (%s)" command status))
+		("not running"))
+      :face (if (eq status 'run) 'success '(bold error)))
+     (when (eq status 'run)
+       (list (flycheck-verification-result-new
+	      :label "F# Project"
+	      :message (or  project-file "None")
+	      :face (if project-file 'success '(bold warning)))
+	     (flycheck-verification-result-new
+	      :label "Loaded Projects"
+	      :message (if projects
+			   (mapconcat #'identity projects ", ")
+			 "No projects loaded")
+	      :face (if projects 'success '(bold warning))))))))
+
 (defun flycheck-fsharp-fsautocomplete-lint-start (checker callback)
   "Start a F# syntax check with CHECKER.
 CALLBACK is the status callback passed by Flycheck."
@@ -52,6 +80,7 @@ CALLBACK is the status callback passed by Flycheck."
 See URL `https://github.com/fsharp/FsAutoComplete'."
   :start #'flycheck-fsharp-fsautocomplete-lint-start
   :predicate #'flycheck-fsharp--can-make-request-p
+  :verify #'flycheck-verify-fsautocomlete
   :modes '(fsharp-mode))
 
 (defvar flycheck-fsharp--error-callback-info nil)
@@ -68,6 +97,7 @@ See URL `https://github.com/fsharp/FsAutoComplete'."
   :start #'flycheck-fsharp-fsautocomplete-start
   :modes '(fsharp-mode)
   :predicate #'flycheck-fsharp--can-make-request-p
+  :verify #'flycheck-verify-fsautocomlete
   :next-checkers '((info . fsharp-fsautocomplete-lint)))
 
 (defun flycheck-fsharp-handle-lint (data)

fsharp-mode-completion.el

@@ -84,7 +84,8 @@ If set to nil, display in a help buffer instead.")
   (push (cons host process) fsharp-ac-completion-process-alist))
 
 (defun fsharp-ac-completion-process-del (host)
-  (delq (assoc host fsharp-ac-completion-process-alist) fsharp-ac-completion-process-alist))
+  (setq fsharp-ac-completion-process-alist
+	(delq (assoc host fsharp-ac-completion-process-alist) fsharp-ac-completion-process-alist)))
 
 (defvar fsharp-ac--project-data (make-hash-table :test 'equal)
   "Data returned by fsautocomplete for loaded projects.")
@@ -246,9 +247,8 @@ For indirect buffers return the truename of the base buffer."
 
 (defun fsharp-ac/load-file (file)
   "Start the compiler binding for an individual F# script FILE."
-  (when (and (fsharp-ac--script-file-p file) (file-exists-p file))
-    (unless (fsharp-ac--process-live-p (fsharp-ac--hostname file))
-      (fsharp-ac/start-process))
+  (when (and (fsharp-ac--script-file-p file) (not (fsharp-ac--process-live-p (fsharp-ac--hostname file))))
+    (fsharp-ac/start-process)
     (add-hook 'after-save-hook 'fsharp-ac--load-after-save nil 'local)))
 
 (defun fsharp-ac--load-after-save ()
@@ -270,6 +270,9 @@ For indirect buffers return the truename of the base buffer."
                        (downcase (file-name-extension file)))))
 
 (defun fsharp-ac--in-project-p (file)
+  "Return F# project file for source FILE.
+
+Return nil if FILE is not part of a F# project."
   (gethash file fsharp-ac--project-files))
 
 (defun fsharp-ac--reset ()