Company flow

Flow backend for company-mode. Flow-based autocomplete for Emacs.

Installation

You can install this package from Melpa

M-x package-install RET company-flow RET

Usage

Ensure that flow is in your path.

Add to your company-backends for your preferred javascript modes, for example:

(eval-after-load 'company
  (add-to-list 'company-backends 'company-flow))

Configuration

company-flow-executable

Buffer local variable that should point to the flow executable. Defaults to "flow". Set to nil to disable company-flow.

For best performance, you can set this to the actual flow binary in your project. Here's one way to do that:

(defun flow/set-flow-executable ()
  (interactive)
  (let* ((os (pcase system-type
               ('darwin "osx")
               ('gnu/linux "linux64")
               (_ nil)))
         (root (locate-dominating-file  buffer-file-name  "node_modules/flow-bin"))
         (executable (car (file-expand-wildcards
                           (concat root "node_modules/flow-bin/*" os "*/flow")))))
    (setq-local company-flow-executable executable)
    ;; These are not necessary for this package, but a good idea if you use
    ;; these other packages
    (setq-local flow-minor-default-binary executable)
    (setq-local flycheck-javascript-flow-executable executable)))

;; Set this to the mode you use, I use rjsx-mode
(add-hook 'rjsx-mode-hook #'flow/set-flow-executable t)

company-flow-modes

List of major modes where company-flow should provide completions if it is part of company-backends. Set to nil to enable company-flow for all major modes.

Thanks

• @proofit404 for a nice example backend with company-tern.
• @dgutov for company-mode and lots of feedback.
• @lunaryorn for the process communication code from flycheck.