mirror of
https://github.com/joaotavora/yasnippet.git
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273 lines
8.5 KiB
Org Mode
273 lines
8.5 KiB
Org Mode
#+TITLE: Yet another snippet extension
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#+OPTIONS: toc:1
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#+STARTUP: showall
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#+STYLE: <link rel="stylesheet" type="text/css" href="stylesheets/styles.css" />
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# External links
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#
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#+LINK: smart-snippet http://code.google.com/p/smart-snippet
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#+LINK: pluskid http://pluskid.lifegoo.org
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#+LINK: screencast http://www.youtube.com/watch?v=ZCGmZK4V7Sg
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#+LINK: docs http://capitaomorte.github.com/yasnippet
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#+LINK: issues https://github.com/capitaomorte/yasnippet/issues
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#+LINK: googlecode-tracker http://code.google.com/p/yasnippet/issues/list
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#+LINK: forum http://groups.google.com/group/smart-snippet
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* Quick start
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*YASnippet* is a template system for Emacs. It allows you to type an
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abbreviation and automatically expand it into function templates. Bundled
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language templates includes: C, C++, C#, Perl, Python, Ruby, SQL, LaTeX, HTML,
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CSS and more. The snippet syntax is inspired from TextMate's syntax, you can
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even [[#import-textmate][import most TextMate snippets]]
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YASnippet is an original creation of [[pluskid]] who also wrote its predecessor
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[[smart-snippet]].
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** Watch a demo
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On [[screencast][youtube]].
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** Installation
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Clone this repository somewhere
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#+begin_example
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$ cd ~/.emacs.d/plugins
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$ git clone https://github.com/capitaomorte/yasnippet
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#+end_example
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Add the following in your =.emacs= file:
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#+begin_src emacs-lisp :exports code
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(add-to-list 'load-path
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"~/.emacs.d/plugins/yasnippet")
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(require 'yasnippet)
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(yas-global-mode 1)
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#+end_src
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Add your own snippets to =~/.emacs.d/snippets= by placing files there or
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invoking [[#yas-new-snippet][=yas-new-snippet=]].
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** Import textmate snippets (rails example)
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:PROPERTIES:
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:CUSTOM_ID: import-textmate
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:END:
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YASnippet lets you use TextMate bundles directly:
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#+begin_example
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$ cd ~/.emacs.d/plugins
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$ git clone https://github.com/capitaomorte/yasnippet
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$ cd yasnippet
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$ git submodule init
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$ git submodule update
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$ gem install plist trollop
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$ rake convert_bundles # will convert ruby, rails and html bundles from drnic
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#+end_example
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Then, in your =.emacs= file
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#+begin_example
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(add-to-list 'load-path
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"~/.emacs.d/plugins/yasnippet")
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(require 'yasnippet)
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(setq yas-snippet-dirs '("~/.emacs.d/snippets" "~/.emacs.d/extras/imported"))
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(yas-global-mode 1)
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#+end_example
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Open some rails file (model, app, etc) and start using the textmate
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snippets. Consider that this is a work-in-progress and many snippets/commands
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might not work. Patches welcome!
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** Contributing snippets
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Please *do not ask me* to add snippets to the default collection under
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=/snippets=. This collection is considered frozen. By customizing
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[[#yas-snippet-dirs][=yas-snippet-dirs=]] you can point yasnippet to good
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snippet collections out there.
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The =extras/textmate-import.rb= tool can import many actual Textmate
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snippets. I'm focusing on developing it and the accompanying =yas-setup.el=
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files that guide it with more difficult importations. The idea is to deprecate
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=/snippets= and replace it with =extras/imported=.
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** Documentation, issues, etc
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Please refer to the comprehensive [[docs][documentation]] for full
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customization and support. If you think you've found a bug, please report it
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on [[issues][the GitHub issue tracker]]. (please **do not** submit new
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issues to the old [[googlecode-tracker][googlecode tracker]])
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If you run into problems using YASnippet, or have snippets to contribute,
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post to the [[forum][yasnippet forum]]. Thank you very much for using
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YASnippet!
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* Organizing snippets
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** Basic structure
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Snippet collections can be stored in plain text files. They are arranged by
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sub-directories naming *snippet tables*. These mostly name Emacs major names.
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#+begin_example
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.
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|-- c-mode
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| `-- printf
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|-- java-mode
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| `-- println
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`-- text-mode
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|-- email
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`-- time
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#+end_example
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The collections are loaded into *snippet tables* which the triggering
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mechanism (see [[#expand-snippets][Expanding snippets]]) looks up and
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(hopefully) cause the right snippet to be expanded for you.
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** Setting up =yas-snippet-dirs=
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The emacs variable [[#yas-snippet-dirs][=yas-snippet-dirs=]] tells YASnippet
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which collections to consider. It's used when you activate
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[[#yas-global-mode][=yas-global-mode=]] or call
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[[#yas-reload-all][=yas-reload-all=]] interactively.
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The default considers:
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- a personal collection that lives in =~/.emacs.d/snippets=
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- the bundled collection, taken as a relative path to =yasnippet.el= localtion
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When you come across other snippet collections, do the following to try them
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out:
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#+begin_src emacs-lisp :exports code
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;; Develop in ~/emacs.d/mysnippets, but also
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;; try out snippets in ~/Downloads/interesting-snippets
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(setq yas-snippet-dirs '("~/emacs.d/mysnippets"
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"~/Downloads/interesting-snippets"))
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;; OR, keeping yasnippet's defaults try out ~/Downloads/interesting-snippets
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(setq yas-snippet-dirs (append yas-snippet-dirs
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'("~/Downloads/interesting-snippets")))
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#+end_src
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Collections appearing earlier in the list shadow snippets with same names
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appearing in collections later in the list. [[#yas-new-snippet][=yas-new-snippet=]] always stores
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snippets in the first collection.
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** The =.yas-parents= file
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It's very useful to have certain modes share snippets between themselves. To do
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this, choose a mode subdirectory and place a =.yas-parents= containing a
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whitespace-separated list of other mode names. When you reload those modes
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become parents of the original mode.
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#+begin_example
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.
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|-- c-mode
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| |-- .yas-parents # contains "cc-mode text-mode"
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| `-- printf
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|-- cc-mode
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| |-- for
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| `-- while
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|-- java-mode
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| |-- .yas-parents # contains "cc-mode text-mode"
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| `-- println
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`-- text-mode
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|-- email
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`-- time
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#+end_example
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** TODO The =.yas-make-groups= file
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If you place an empty plain text file =.yas-make-groups= inside one of the
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mode directories, the names of these sub-directories are considered groups of
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snippets and [[snippet-menu][the menu]] is organized much more cleanly:
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(TODO image)
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Another alternative way to achieve this is to place a =# group:= directive
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inside the snippet definition. See [[#writing-snippets][Writing Snippets]]
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#+begin_example
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$ tree ruby-mode/
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ruby-mode/
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|-- .yas-make-groups
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|-- collections
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| |-- each
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| `-- ...
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|-- control structure
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| |-- forin
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| `-- ...
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|-- definitions
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| `-- ...
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`-- general
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`-- ...
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#+end_example
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Yet another way to create a nice snippet menu is to write into
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=.yas-make-groups= a menu definition. TODO
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** TODO The =.yas-setup.el= file
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*** TODO
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** TODO The =.yas-compiled-snippet.el= file
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*** TODO
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** The =.yas-skip= file
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* Expanding Snippets
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:PROPERTIES:
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:CUSTOM_ID: expand-snippets
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:END:
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This section describes how YASnippet chooses snippets for expansion at point.
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Maybe, you'll want some snippets to be expanded in a particular
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mode, or only under certain conditions, or be prompted using
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** Triggering expansion
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To make a snippet expand after the cursor:
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* Type the snippet's *trigger key* then calling [[#yas-expand][=yas-expand=]]. It's bound to
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=TAB= and =<tab>= by default, to change it use
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#+begin_src emacs-lisp :exports code
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(define-key yas-minor-mode-map (kbd "<tab>") nil)
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(define-key yas-minor-mode-map (kbd "TAB") nil)
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(define-key yas-minor-mode-map (kbd "<the new key>") 'yas-expand)
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#+end_src
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* Use the snippet's *keybinding*.
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* Call [[#yas-insert-snippet][=yas-insert-snippet=]] (use =M-x
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yas-insert-snippet== or its keybinding =C-c & C-s=).
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* By expanding directly from the "YASnippet" menu in the menu-bar
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* Using hippie-expand
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* Use m2m's excellent auto-complete
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* Reference
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#+BEGIN_SRC emacs-lisp :exports results :results value raw
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(yas--document-symbols 2 `("Interactive functions" . ,#'interactive-form)
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`("Customization variables" . ,#'(lambda (sym)
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(and (boundp sym)
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(get sym 'standard-value))))
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`("Useful functions" . ,#'fboundp)
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`("Useful variables" . ,#'boundp))
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#+END_SRC
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# Local Variables:
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# mode: org
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# fill-column: 80
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# coding: utf-8
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# End:
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