Symbol's function definition is void: ac-html-define-ac-source

[cdwfs]

I use the ac-html package out of MELPA. Sometime last week I started getting an error message at startup that ac-html-define-ac-source is undefined. Curiously, it's only happening on my Linux system (Emacs 24.3.1); the same suite of packages works fine on Windows (Emacs 24.5.1). Do you have any idea what might be causing this error? I'm afraid I don't have much more to offer than that; my elisp-fu is pretty weak. I'm happy to provide further information about my setup if necessary.

[victorteokw]

Here is a example of setup ac-html for completion with web mode:

(eval-after-load "web-mode"
  '(progn
     (setq web-mode-ac-sources-alist
           '(("css" . (ac-source-words-in-buffer ac-source-css-property))
             ("html" . (ac-source-html-tag
                        ac-source-html-attr
                        ac-source-html-attrv))
             ("php" . (ac-source-words-in-buffer
                       ac-source-words-in-same-mode-buffers
                       ac-source-dictionary))))

(add-hook 'web-mode-hook
          (lambda ()
            (require 'ac-html)
            (require 'ac-html-default-data-provider)
            (ac-html-enable-data-provider 'ac-html-default-data-provider)
            (ac-html-setup)
            (auto-complete-mode)))

For slim, haml or jade, just remove the eval-after-load and require corresponding ac-slim, ac-haml or ac-jade. And add some code like this:

  (require 'ac-haml)
  (require 'ac-html-default-data-provider)
  (ac-html-enable-data-provider 'ac-html-default-data-provider)
  (ac-haml-setup)
  (setq ac-sources '(ac-source-haml-tag
                     ac-source-haml-attr
                     ac-source-haml-attrv))
  (auto-complete-mode)

If this doesn't fix for you, can you paste your emacs setup for ac-html?

[cdwfs]

Thanks; there's definitely a few things in the setup code you posted that I'm not doing, so I'll be adding those for sure. However, this error seems to occur at package load time, before I hit any of my setup/custimization code for web-mode or ac. If I force it to break at init time by loading packages at the beginning of my init.el:

(setq package-enable-at-startup nil)
(package-initialize)

and running emacs --debug-init, here's the backtrace I get:

Debugger entered--Lisp error: (void-function ac-html-define-ac-source)
  (ac-html-define-ac-source "haml" :tag-prefix "%\\(.*\\)" :attr-prefix ":\\(.*\\)" :attrv-prefix ac-haml-attrv-prefix :current-tag-func ac-haml-current-tag :current-attr-func ac-haml-current-attr)
  eval-buffer(#<buffer  *load*-825801> nil "/home/cort/.emacs.d/elpa/ac-html-20150904.2032/ac-html-autoloads.el" nil t)  ; Reading at buffer position 388
  load-with-code-conversion("/home/cort/.emacs.d/elpa/ac-html-20150904.2032/ac-html-autoloads.el" "/home/cort/.emacs.d/elpa/ac-html-20150904.2032/ac-html-autoloads.el" nil t)
  load("/home/cort/.emacs.d/elpa/ac-html-20150904.2032/ac-html-autoloads" nil t)
  package-activate-1(ac-html [(20150904 2032) ((auto-complete (1 4)) (s (1 9)) (f (0 17)) (dash (2 10))) "auto complete source for html tags and attributes"])
  package-activate(ac-html (20150904 2032))
  package-initialize()
  eval-buffer(#<buffer  *load*> nil "/home/cort/.emacs.d/init.el" nil t)  ; Reading at buffer position 480
  load-with-code-conversion("/home/cort/.emacs.d/init.el" "/home/cort/.emacs.d/init.el" t t)
  load("/home/cort/.emacs.d/init" t t)
  #[0 "\205\262   \306=\203\307\310Q\202; \311=\204\307\312Q\202;\313\307\314\315#\203*\316\202;\313\307\314\317#\203:\320\nB\321\202;\316\322\323
\322\211#\210\322=\203a\324\325\326\307\327Q!\"\323
\322\211#\210\322=\203`
\210\203\243\330!\331\232\203\243\332!\211\333P\334
!\203}\211\202\210\334!\203\207
\202\210\314\262
\203\241\335\"\203\237\336\337#\210\340\341!\210
\266\f?\205\260\314\323\342\322\211#)\262
\207" [init-file-user system-type delayed-warnings-list user-init-file inhibit-default-init inhibit-startup-screen ms-dos "~" "/_emacs" windows-nt "/.emacs" directory-files nil "^\\.emacs\\(\\.elc?\\)?$" "~/.emacs" "^_emacs\\(\\.elc?\\)?$" (initialization "`_emacs' init file is deprecated, please use `.emacs'") "~/_emacs" t load expand-file-name "init" file-name-as-directory "/.emacs.d" file-name-extension "elc" file-name-sans-extension ".el" file-exists-p file-newer-than-file-p message "Warning: %s is newer than %s" sit-for 1 "default"] 7 "\n\n(fn)"]()
  command-line()
  normal-top-level()

[ghost]

The melpa package is broken. The autoloads are not set up correct. Delete the whole file and load it manually (like the snippet from cheunghy does). Also the completion-data folder is not inside the melpa package. You'll have to get it from the git archive.

[victorteokw]

Thanks!

I've opened pull request on melpa for including back the completion data. The other issues is fixed in the newest ac-html.

Currently, you may directly checkout this repo and put completion data into the package directory. After the pull request is approved by melpa, the completion data is automatically installed with ac-html.

If it still not working, notify me, I will investigate and fix.

[cdwfs]

Thanks; the error is gone in the new melpa build.