Merge pull request #1 from maciej-szlosarczyk/add-gg-tags-and-better-erlang-version-management

Add gg tags and better erlang version management

02macros.el

@@ -0,0 +1,6 @@
+(defmacro -> (&rest body)
+  "Clojure ->  macro for BODY."
+  (let ((result (pop body)))
+    (dolist (form body result)
+      (setq result (append (list (car form) result)
+                           (cdr form))))))

08ctags.el

@@ -1,9 +1,14 @@
 ;; Do not mix ctags between folders
+(provide 'my-ctags-config)
+
 (setq tags-add-tables nil)
+(setq ctags/refresh-command
+      (format "ctags -e -R -f %sTAGS %s."
+              default-directory default-directory))
 
 ;; Sentinel function for capturing ctags
-(defun ctags-process-callback (process event)
-  "Show status of asynchronous ctags-process after it finishes."
+(defun ctags/process-callback (process event)
+  "Show status of asynchronous ctags/process after it finishes."
   (cond
    ((string-equal event "finished\n")
     (message "Creating tag files...completed")
@@ -14,17 +19,31 @@
     (pop-to-buffer (get-buffer "*ctags*"))
     )))
 
-(setq ctags-refresh-command
-      (format "ctags -e -R -f %sTAGS %s."
-              default-directory default-directory))
-
-(defun refresh-ctags ()
+(cl-defun ctags/refresh-ctags (&key silent)
   "Refresh ctags according to currently set command."
   (interactive)
 
-  (message "Starting ctags process")
-  (start-process-shell-command "ctags" "*ctags*" ctags-refresh-command)
-  (set-process-sentinel (get-process "ctags") 'ctags-process-callback))
+  ;; Print message if not silent
+  (when (not silent) (message "Starting ctags process..."))
+
+  ;; Return if a version of the process is already running
+  (when (not (get-process "ctags"))
+    (start-process-shell-command "ctags" "*ctags*" ctags/refresh-command)
+    (set-process-sentinel (get-process "ctags") 'ctags/process-callback)))
 
 ;; Ctags bindings
-(define-key prog-mode-map (kbd "C-c E") 'refresh-ctags)
+(define-key prog-mode-map (kbd "C-c E") 'ctags/refresh-ctags)
+
+;; Automatically update tags on save, but be silent about it.
+(setq ctags/major-modes-to-update-on-save '())
+(defun ctags/update-tags-on-save ()
+  "Update tags if current major mode is part of the list."
+  (interactive)
+  (when (member major-mode ctags/major-modes-to-update-on-save)
+    (ctags/refresh-ctags :silent t)))
+
+(defun ctags/update-this-mode-on-save (mode)
+  "Update MODE on save."
+  (add-to-list (make-local-variable 'ctags/major-modes-to-update-on-save) mode))
+
+(add-hook 'after-save-hook 'ctags/update-tags-on-save)

20clang.el

@@ -7,7 +7,7 @@
                '(company-etags company-yasnippet))
 
   (setq-local
-   ctags-refresh-command
+   ctags/refresh-command
    (format
     "ctags -e -R --languages=C -f %sTAGS %s."
     (projectile-project-root) (projectile-project-root)

20erlang.el

@@ -1,15 +1,36 @@
-;; Add erlang installation to load path
-(setq erlang-asdf-root "$HOME/.asdf/installs/erlang/21.3.8/")
+(cl-defun erlang/emacs-path (erlang-version)
+  (car (split-string
+        (shell-command-to-string
+         (format "find $HOME/.asdf/installs/erlang/%s/ -name erlang.el"
+                 erlang-version)) "erlang.el")))
 
-(setq load-path
-      (cons (format "%slib/tools-3.1/emacs" erlang-asdf-root)
-            load-path))
+(cl-defun erlang/erlang-path (erlang-version)
+  (format "$HOME/.asdf/installs/erlang/%s/" erlang-version))
 
-(require 'erlang-start)
+(defun erlang/erlang-plist (erlang-version)
+  "Create property list for ERLANG-VERSION."
+  (list :version erlang-version
+        :erlang-path (erlang/erlang-path erlang-version)
+        :emacs-path (erlang/emacs-path erlang-version)))
 
-(setq erlang-root-dir erlang-asdf-root)
-(setq exec-path (cons (format "%sbin" erlang-asdf-root) exec-path))
-(setq erlang-man-root-dir (format "%sman" erlang-asdf-root))
+(cl-defun erlang/installed-erlangs ()
+  (split-string
+   (shell-command-to-string
+    (format "asdf list erlang"))))
+
+(cl-defun erlang/available-versions--plist ()
+  (mapcar 'erlang/erlang-plist (erlang/installed-erlangs)))
+
+(setq erlang/available-versions (erlang/available-versions--plist))
+
+(cl-defun erlang/currently-in-use ()
+  (car (split-string (shell-command-to-string "asdf current erlang"))))
+
+(cl-defun erlang/current-version--plistp (erlang-plist)
+  (equal (plist-get erlang-plist :version) (erlang/currently-in-use)))
+
+(cl-defun erlang/current-plist ()
+  (seq-find 'erlang/current-version--plistp erlang/available-versions))
 
 ;; Flycheck checker for Erlang
 (flycheck-define-checker erlang-otp
@@ -22,26 +43,46 @@
    (error line-start (file-name) ":" line ": " (message) line-end))
   :modes (my-erlang-mode))
 
-(defun activate-erlang-mode ()
+(defun erlang/activate-erlang-mode ()
   "All things for all Erlang, including header files."
+  (when (featurep 'erlang-start) (unload-feature 'erlang-start))
+
+  (setq erlang/current-erlang (erlang/current-plist))
+
+  (add-to-list (make-local-variable 'load-path)
+               (plist-get erlang/current-erlang :emacs-path))
+
+  (add-to-list (make-local-variable 'exec-path)
+               (format "%slib/tools-3.1/emacs"
+                       (plist-get erlang/current-erlang :erlang-path)))
+
+  (setq-local erlang-man-root-dir
+              (format "%sman"
+                      (plist-get erlang/current-erlang :erlang-path)))
+
+  (require 'erlang-start)
 
   ;; Set specific ctags command
   (setq-local
-   ctags-refresh-command
+   ctags/refresh-command
    (format
     "ctags -e -R --languages=erlang -f %sTAGS %s. %slib/stdlib-* %slib/kernel-*"
     (projectile-project-root) (projectile-project-root)
-    erlang-asdf-root erlang-asdf-root))
+    (plist-get erlang/current-erlang :erlang-path)
+    (plist-get erlang/current-erlang :erlang-path)))
 
   ;; Company list override
   (add-to-list (make-local-variable 'company-backends)
                '(company-etags company-yasnippet)))
 
-(add-hook 'erlang-mode-hook 'activate-erlang-mode)
+(add-hook 'erlang-mode-hook 'erlang/activate-erlang-mode)
 
 (define-derived-mode my-erlang-mode erlang-mode "My Erlang mode"
   "A mode for Erlang things"
 
   (activate-erlang-mode)
   ;; Enable flycheck
-  (flycheck-select-checker 'erlang-otp))
+  (flycheck-select-checker 'erlang-otp)
+
+  ;; Automatically update tags on save
+  (ctags/update-this-mode-on-save 'erlang-mode))

20ruby.el

@@ -26,10 +26,11 @@
   (setq ruby-insert-encoding-magic-comment nil)
 
   ;; Company list override
-  (add-to-list (make-local-variable 'company-backends) '(company-etags company-yasnippet))
+  (add-to-list (make-local-variable 'company-backends)
+               '(company-etags company-yasnippet))
 
   ;; Set specific ctags command
-  (setq-local ctags-refresh-command
+  (setq-local ctags/refresh-command
               (format "ctags -e -R --languages=ruby -f %sTAGS %s. $(bundle list --paths)"
                       (projectile-project-root) (projectile-project-root))))
 

init.el

@@ -104,6 +104,7 @@
 
 ;; Additional files
 (load "~/.emacs.d/01mac.el")
+(load "~/.emacs.d/02macros.el")
 (load "~/.emacs.d/02ivy.el")
 (load "~/.emacs.d/03hydra.el")
 (load "~/.emacs.d/04magit.el")