This is use-package.info, produced by makeinfo version 6.5 from use-package.texi. Copyright (C) 2012-2017 John Wiegley You can redistribute this document and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. INFO-DIR-SECTION Emacs START-INFO-DIR-ENTRY * use-package: (use-package). Declarative package configuration for Emacs. END-INFO-DIR-ENTRY  File: use-package.info, Node: Top, Next: Introduction, Up: (dir) use-package User Manual *********************** use-package is... Copyright (C) 2012-2017 John Wiegley You can redistribute this document and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. * Menu: * Introduction:: * Installation:: * Getting Started:: * Keywords:: * FAQ:: * Debugging Tools:: * Command Index:: * Function Index:: * Variable Index:: — The Detailed Node Listing — Installation * Installing from an Elpa Archive:: * Installing from the Git Repository:: * Post-Installation Tasks:: Keywords * ‘:after’: after. * ‘:bind-keymap’, ‘:bind-keymap*’: bind-keymap bind-keymap*. * ‘:bind’, ‘:bind*’: bind bind*. * ‘:commands’: commands. * ‘:preface’, ‘:init’, ‘:config’: preface init config. * ‘:custom’: custom. * ‘:custom-face’: custom-face. * ‘:defer’, ‘:demand’: defer demand. * ‘:defines’, ‘:functions’: defines functions. * ‘:diminish’, ‘:delight’: diminish delight. * ‘:disabled’: disabled. * ‘:ensure’, ‘:pin’: ensure pin. * ‘:hook’: hook. * ‘:if’, ‘:when’, ‘:unless’: if when unless. * ‘:load-path’: load-path. * ‘:mode’, ‘:interpreter’: mode interpreter. * ‘:magic’, ‘:magic-fallback’: magic magic-fallback. * ‘:no-require’: no-require. * ‘:requires’: requires. ‘:bind’, ‘:bind*’ * Binding to local keymaps:: FAQ * FAQ - How to ...?:: * FAQ - Issues and Errors:: FAQ - How to ...? * This is a question:: FAQ - Issues and Errors * This is an issues::  File: use-package.info, Node: Introduction, Next: Installation, Prev: Top, Up: Top 1 Introduction ************** The ‘use-package’ macro allows you to isolate package configuration in your ‘.emacs’ file in a way that is both performance-oriented and, well, tidy. I created it because I have over 400 packages that I use in Emacs, and things were getting difficult to manage. Yet with this utility my total load time is around 2 seconds, with no loss of functionality!  File: use-package.info, Node: Installation, Next: Getting Started, Prev: Introduction, Up: Top 2 Installation ************** use-package can be installed using Emacs’ package manager or manually from its development repository. * Menu: * Installing from an Elpa Archive:: * Installing from the Git Repository:: * Post-Installation Tasks::  File: use-package.info, Node: Installing from an Elpa Archive, Next: Installing from the Git Repository, Up: Installation 2.1 Installing from an Elpa Archive =================================== use-package is available from Melpa and Melpa-Stable. If you haven’t used Emacs’ package manager before, then it is high time you familiarize yourself with it by reading the documentation in the Emacs manual, see *note (emacs)Packages::. Then add one of the archives to ‘package-archives’: • To use Melpa: (require 'package) (add-to-list 'package-archives '("melpa" . "https://melpa.org/packages/") t) • To use Melpa-Stable: (require 'package) (add-to-list 'package-archives '("melpa-stable" . "https://stable.melpa.org/packages/") t) Once you have added your preferred archive, you need to update the local package list using: M-x package-refresh-contents RET Once you have done that, you can install use-package and its dependencies using: M-x package-install RET use-package RET Now see *note Post-Installation Tasks::.  File: use-package.info, Node: Installing from the Git Repository, Next: Post-Installation Tasks, Prev: Installing from an Elpa Archive, Up: Installation 2.2 Installing from the Git Repository ====================================== First, use Git to clone the use-package repository: $ git clone https://github.com/jwiegley/use-package.git ~/.emacs.d/site-lisp/use-package $ cd ~/.emacs.d/site-lisp/use-package Then compile the libraries and generate the info manuals: $ make You may need to create ‘/path/to/use-package/config.mk’ with the following content before running ‘make’: LOAD_PATH = -L /path/to/use-package Finally add this to your init file: (add-to-list 'load-path "~/.emacs.d/site-lisp/use-package") (require 'use-package) (with-eval-after-load 'info (info-initialize) (add-to-list 'Info-directory-list "~/.emacs.d/site-lisp/use-package/")) Note that elements of ‘load-path’ should not end with a slash, while those of ‘Info-directory-list’ should. Instead of running use-package directly from the repository by adding it to the ‘load-path’, you might want to instead install it in some other directory using ‘sudo make install’ and setting ‘load-path’ accordingly. To update use-package use: $ git pull $ make At times it might be necessary to run ‘make clean all’ instead. To view all available targets use ‘make help’. Now see *note Post-Installation Tasks::.  File: use-package.info, Node: Post-Installation Tasks, Prev: Installing from the Git Repository, Up: Installation 2.3 Post-Installation Tasks =========================== After installing use-package you should verify that you are indeed using the use-package release you think you are using. It’s best to restart Emacs before doing so, to make sure you are not using an outdated value for ‘load-path’. C-h v use-package-version RET should display something like use-package-version’s value is "2.4" If you are completely new to use-package then see *note Getting Started::. If you run into problems, then please see the *note FAQ::. Also see the *note Debugging Tools::.  File: use-package.info, Node: Getting Started, Next: Keywords, Prev: Installation, Up: Top 3 Getting Started ***************** TODO. For now, see ‘README.md’.  File: use-package.info, Node: Keywords, Next: FAQ, Prev: Getting Started, Up: Top 4 Keywords ********** * Menu: * ‘:after’: after. * ‘:bind-keymap’, ‘:bind-keymap*’: bind-keymap bind-keymap*. * ‘:bind’, ‘:bind*’: bind bind*. * ‘:commands’: commands. * ‘:preface’, ‘:init’, ‘:config’: preface init config. * ‘:custom’: custom. * ‘:custom-face’: custom-face. * ‘:defer’, ‘:demand’: defer demand. * ‘:defines’, ‘:functions’: defines functions. * ‘:diminish’, ‘:delight’: diminish delight. * ‘:disabled’: disabled. * ‘:ensure’, ‘:pin’: ensure pin. * ‘:hook’: hook. * ‘:if’, ‘:when’, ‘:unless’: if when unless. * ‘:load-path’: load-path. * ‘:mode’, ‘:interpreter’: mode interpreter. * ‘:magic’, ‘:magic-fallback’: magic magic-fallback. * ‘:no-require’: no-require. * ‘:requires’: requires.  File: use-package.info, Node: after, Next: bind-keymap bind-keymap*, Up: Keywords 4.1 ‘:after’ ============ Sometimes it only makes sense to configure a package after another has been loaded, because certain variables or functions are not in scope until that time. This can achieved using an ‘:after’ keyword that allows a fairly rich description of the exact conditions when loading should occur. Here is an example: (use-package hydra :load-path "site-lisp/hydra") (use-package ivy :load-path "site-lisp/swiper") (use-package ivy-hydra :after (ivy hydra)) In this case, because all of these packages are demand-loaded in the order they occur, the use of ‘:after’ is not strictly necessary. By using it, however, the above code becomes order-independent, without an implicit depedence on the nature of your init file. By default, ‘:after (foo bar)’ is the same as ‘:after (:all foo bar)’, meaning that loading of the given package will not happen until both ‘foo’ and ‘bar’ have been loaded. Here are some of the other possibilities: :after (foo bar) :after (:all foo bar) :after (:any foo bar) :after (:all (:any foo bar) (:any baz quux)) :after (:any (:all foo bar) (:all baz quux)) When you nest selectors, such as ‘(:any (:all foo bar) (:all baz quux))’, it means that the package will be loaded when either both ‘foo’ and ‘bar’ have been loaded, or both ‘baz’ and ‘quux’ have been loaded.  File: use-package.info, Node: bind-keymap bind-keymap*, Next: bind bind*, Prev: after, Up: Keywords 4.2 ‘:bind-keymap’, ‘:bind-keymap*’ =================================== Normally ‘:bind’ expects that commands are functions that will be autoloaded from the given package. However, this does not work if one of those commands is actually a keymap, since keymaps are not functions, and cannot be autoloaded using Emacs’ ‘autoload’ mechanism. To handle this case, ‘use-package’ offers a special, limited variant of ‘:bind’ called ‘:bind-keymap’. The only difference is that the "commands" bound to by ‘:bind-keymap’ must be keymaps defined in the package, rather than command functions. This is handled behind the scenes by generating custom code that loads the package containing the keymap, and then re-executes your keypress after the first load, to reinterpret that keypress as a prefix key. For example: (use-package projectile :bind-keymap ("C-c p" . projectile-command-map)  File: use-package.info, Node: bind bind*, Next: commands, Prev: bind-keymap bind-keymap*, Up: Keywords 4.3 ‘:bind’, ‘:bind*’ ===================== Another common thing to do when loading a module is to bind a key to primary commands within that module: (use-package ace-jump-mode :bind ("C-." . ace-jump-mode)) This does two things: first, it creates an autoload for the ‘ace-jump-mode’ command and defers loading of ‘ace-jump-mode’ until you actually use it. Second, it binds the key ‘C-.’ to that command. After loading, you can use ‘M-x describe-personal-keybindings’ to see all such keybindings you’ve set throughout your ‘.emacs’ file. A more literal way to do the exact same thing is: (use-package ace-jump-mode :commands ace-jump-mode :init (bind-key "C-." 'ace-jump-mode)) When you use the ‘:commands’ keyword, it creates autoloads for those commands and defers loading of the module until they are used. Since the ‘:init’ form is always run—even if ‘ace-jump-mode’ might not be on your system—remember to restrict ‘:init’ code to only what would succeed either way. The ‘:bind’ keyword takes either a cons or a list of conses: (use-package hi-lock :bind (("M-o l" . highlight-lines-matching-regexp) ("M-o r" . highlight-regexp) ("M-o w" . highlight-phrase))) The ‘:commands’ keyword likewise takes either a symbol or a list of symbols. NOTE: Special keys like ‘tab’ or ‘F1’-‘Fn’ can be written in square brackets, i.e. ‘[tab]’ instead of ‘"tab"’. The syntax for the keybindings is similar to the "kbd" syntax: see the Emacs Manual (https://www.gnu.org/software/emacs/manual/html_node/emacs/Init-Rebinding.html) for more information. Examples: (use-package helm :bind (("M-x" . helm-M-x) ("M-" . helm-find-files) ([f10] . helm-buffers-list) ([S-f10] . helm-recentf))) * Menu: * Binding to local keymaps::  File: use-package.info, Node: Binding to local keymaps, Up: bind bind* 4.3.1 Binding to local keymaps ------------------------------ Slightly different from binding a key to a keymap, is binding a key *within* a local keymap that only exists after the package is loaded. ‘use-package’ supports this with a ‘:map’ modifier, taking the local keymap to bind to: (use-package helm :bind (:map helm-command-map ("C-c h" . helm-execute-persistent-action))) The effect of this statement is to wait until ‘helm’ has loaded, and then to bind the key ‘C-c h’ to ‘helm-execute-persistent-action’ within Helm’s local keymap, ‘helm-mode-map’. Multiple uses of ‘:map’ may be specified. Any binding occurring before the first use of ‘:map’ are applied to the global keymap: (use-package term :bind (("C-c t" . term) :map term-mode-map ("M-p" . term-send-up) ("M-n" . term-send-down) :map term-raw-map ("M-o" . other-window) ("M-p" . term-send-up) ("M-n" . term-send-down)))  File: use-package.info, Node: commands, Next: preface init config, Prev: bind bind*, Up: Keywords 4.4 ‘:commands’ ===============  File: use-package.info, Node: preface init config, Next: custom, Prev: commands, Up: Keywords 4.5 ‘:preface’, ‘:init’, ‘:config’ ================================== Here is the simplest ‘use-package’ declaration: ;; This is only needed once, near the top of the file (eval-when-compile ;; Following line is not needed if use-package.el is in ~/.emacs.d (add-to-list 'load-path "") (require 'use-package)) (use-package foo) This loads in the package ‘foo’, but only if ‘foo’ is available on your system. If not, a warning is logged to the ‘*Messages*’ buffer. If it succeeds, a message about ‘"Loading foo"’ is logged, along with the time it took to load, if it took over 0.1 seconds. Use the ‘:init’ keyword to execute code before a package is loaded. It accepts one or more forms, up until the next keyword: (use-package foo :init (setq foo-variable t)) Similarly, ‘:config’ can be used to execute code after a package is loaded. In cases where loading is done lazily (see more about autoloading below), this execution is deferred until after the autoload occurs: (use-package foo :init (setq foo-variable t) :config (foo-mode 1)) As you might expect, you can use ‘:init’ and ‘:config’ together: (use-package color-moccur :commands (isearch-moccur isearch-all) :bind (("M-s O" . moccur) :map isearch-mode-map ("M-o" . isearch-moccur) ("M-O" . isearch-moccur-all)) :init (setq isearch-lazy-highlight t) :config (use-package moccur-edit)) In this case, I want to autoload the commands ‘isearch-moccur’ and ‘isearch-all’ from ‘color-moccur.el’, and bind keys both at the global level and within the ‘isearch-mode-map’ (see next section). When the package is actually loaded (by using one of these commands), ‘moccur-edit’ is also loaded, to allow editing of the ‘moccur’ buffer.  File: use-package.info, Node: custom, Next: custom-face, Prev: preface init config, Up: Keywords 4.6 ‘:custom’ ============= The ‘:custom’ keyword allows customization of package custom variables. (use-package comint :custom (comint-buffer-maximum-size 20000 "Increase comint buffer size.") (comint-prompt-read-only t "Make the prompt read only.")) The documentation string is not mandatory.  File: use-package.info, Node: custom-face, Next: defer demand, Prev: custom, Up: Keywords 4.7 ‘:custom-face’ ================== The ‘:custom-face’ keyword allows customization of package custom faces. (use-package eruby-mode :custom-face (eruby-standard-face ((t (:slant italic)))))  File: use-package.info, Node: defer demand, Next: defines functions, Prev: custom-face, Up: Keywords 4.8 ‘:defer’, ‘:demand’ ======================= In almost all cases you don’t need to manually specify ‘:defer t’. This is implied whenever ‘:bind’ or ‘:mode’ or ‘:interpreter’ is used. Typically, you only need to specify ‘:defer’ if you know for a fact that some other package will do something to cause your package to load at the appropriate time, and thus you would like to defer loading even though use-package isn’t creating any autoloads for you. You can override package deferral with the ‘:demand’ keyword. Thus, even if you use ‘:bind’, using ‘:demand’ will force loading to occur immediately and not establish an autoload for the bound key.  File: use-package.info, Node: defines functions, Next: diminish delight, Prev: defer demand, Up: Keywords 4.9 ‘:defines’, ‘:functions’ ============================ Another feature of ‘use-package’ is that it always loads every file that it can when ‘.emacs’ is being byte-compiled. This helps to silence spurious warnings about unknown variables and functions. However, there are times when this is just not enough. For those times, use the ‘:defines’ and ‘:functions’ keywords to introduce dummy variable and function declarations solely for the sake of the byte-compiler: (use-package texinfo :defines texinfo-section-list :commands texinfo-mode :init (add-to-list 'auto-mode-alist '("\\.texi$" . texinfo-mode))) If you need to silence a missing function warning, you can use ‘:functions’: (use-package ruby-mode :mode "\\.rb\\'" :interpreter "ruby" :functions inf-ruby-keys :config (defun my-ruby-mode-hook () (require 'inf-ruby) (inf-ruby-keys)) (add-hook 'ruby-mode-hook 'my-ruby-mode-hook))  File: use-package.info, Node: diminish delight, Next: disabled, Prev: defines functions, Up: Keywords 4.10 ‘:diminish’, ‘:delight’ ============================ ‘use-package’ also provides built-in support for the diminish and delight utilities—if you have them installed. Their purpose is to remove or change minor mode strings in your mode-line. diminish (https://github.com/myrjola/diminish.el) is invoked with the ‘:diminish’ keyword, which is passed either a minor mode symbol, a cons of the symbol and its replacement string, or just a replacement string, in which case the minor mode symbol is guessed to be the package name with "-mode" appended at the end: (use-package abbrev :diminish abbrev-mode :config (if (file-exists-p abbrev-file-name) (quietly-read-abbrev-file))) delight (https://elpa.gnu.org/packages/delight.html) is invoked with the ‘:delight’ keyword, which is passed a minor mode symbol, a replacement string or quoted mode-line data (https://www.gnu.org/software/emacs/manual/html_node/elisp/Mode-Line-Data.html) (in which case the minor mode symbol is guessed to be the package name with "-mode" appended at the end), both of these, or several lists of both. If no arguments are provided, the default mode name is hidden completely. ;; Don't show anything for rainbow-mode. (use-package rainbow-mode :delight) ;; Don't show anything for auto-revert-mode, which doesn't match ;; its package name. (use-package autorevert :delight auto-revert-mode) ;; Remove the mode name for projectile-mode, but show the project name. (use-package projectile :delight '(:eval (concat " " (projectile-project-name)))) ;; Completely hide visual-line-mode and change auto-fill-mode to " AF". (use-package emacs :delight (auto-fill-function " AF") (visual-line-mode))  File: use-package.info, Node: disabled, Next: ensure pin, Prev: diminish delight, Up: Keywords 4.11 ‘:disabled’ ================ The ‘:disabled’ keyword can turn off a module you’re having difficulties with, or stop loading something you’re not using at the present time: (use-package ess-site :disabled :commands R) When byte-compiling your ‘.emacs’ file, disabled declarations are omitted from the output entirely, to accelerate startup times.  File: use-package.info, Node: ensure pin, Next: hook, Prev: disabled, Up: Keywords 4.12 ‘:ensure’, ‘:pin’ ====================== You can use ‘use-package’ to load packages from ELPA with ‘package.el’. This is particularly useful if you share your ‘.emacs’ among several machines; the relevant packages are downloaded automatically once declared in your ‘.emacs’. The ‘:ensure’ keyword causes the package(s) to be installed automatically if not already present on your system (set ‘(setq use-package-always-ensure t)’ if you wish this behavior to be global for all packages): (use-package magit :ensure t) If you need to install a different package from the one named by ‘use-package’, you can specify it like this: (use-package tex :ensure auctex) Lastly, when running on Emacs 24.4 or later, use-package can pin a package to a specific archive, allowing you to mix and match packages from different archives. The primary use-case for this is preferring packages from the ‘melpa-stable’ and ‘gnu’ archives, but using specific packages from ‘melpa’ when you need to track newer versions than what is available in the ‘stable’ archives is also a valid use-case. By default ‘package.el’ prefers ‘melpa’ over ‘melpa-stable’ due to the versioning ‘(> evil-20141208.623 evil-1.0.9)’, so even if you are tracking only a single package from ‘melpa’, you will need to tag all the non-‘melpa’ packages with the appropriate archive. If this really annoys you, then you can set ‘use-package-always-pin’ to set a default. If you want to manually keep a package updated and ignore upstream updates, you can pin it to ‘manual’, which as long as there is no repository by that name, will Just Work(tm). ‘use-package’ throws an error if you try to pin a package to an archive that has not been configured using ‘package-archives’ (apart from the magic ‘manual’ archive mentioned above): Archive 'foo' requested for package 'bar' is not available. Example: (use-package company :ensure t :pin melpa-stable) (use-package evil :ensure t) ;; no :pin needed, as package.el will choose the version in melpa (use-package adaptive-wrap :ensure t ;; as this package is available only in the gnu archive, this is ;; technically not needed, but it helps to highlight where it ;; comes from :pin gnu) (use-package org :ensure t ;; ignore org-mode from upstream and use a manually installed version :pin manual) *NOTE*: the ‘:pin’ argument has no effect on emacs versions < 24.4.  File: use-package.info, Node: hook, Next: if when unless, Prev: ensure pin, Up: Keywords 4.13 ‘:hook’ ============ The ‘:hook’ keyword allows adding functions onto hooks, here only the basename of the hook is required. Thus, all of the following are equivalent: (use-package ace-jump-mode :hook prog-mode) (use-package ace-jump-mode :hook (prog-mode . ace-jump-mode)) (use-package ace-jump-mode :commands ace-jump-mode :init (add-hook 'prog-mode-hook #'ace-jump-mode)) And likewise, when multiple hooks should be applied, the following are also equivalent: (use-package ace-jump-mode :hook (prog-mode text-mode)) (use-package ace-jump-mode :hook ((prog-mode text-mode) . ace-jump-mode)) (use-package ace-jump-mode :hook ((prog-mode . ace-jump-mode) (text-mode . ace-jump-mode))) (use-package ace-jump-mode :commands ace-jump-mode :init (add-hook 'prog-mode-hook #'ace-jump-mode) (add-hook 'text-mode-hook #'ace-jump-mode)) The use of ‘:hook’, as with ‘:bind’, ‘:mode’, ‘:interpreter’, etc., causes the functions being hooked to implicitly be read as ‘:commands’ (meaning they will establish interactive ‘autoload’ definitions for that module, if not already defined as functions), and so ‘:defer t’ is also implied by ‘:hook’.  File: use-package.info, Node: if when unless, Next: load-path, Prev: hook, Up: Keywords 4.14 ‘:if’, ‘:when’, ‘:unless’ ============================== You can use the ‘:if’ keyword to predicate the loading and initialization of modules. For example, I only want ‘edit-server’ running for my main, graphical Emacs, not for other Emacsen I may start at the command line: (use-package edit-server :if window-system :init (add-hook 'after-init-hook 'server-start t) (add-hook 'after-init-hook 'edit-server-start t)) In another example, we can load things conditional on the operating system: (use-package exec-path-from-shell :if (memq window-system '(mac ns)) :ensure t :config (exec-path-from-shell-initialize)) Note that ‘:when’ is provided as an alias for ‘:if’, and ‘:unless foo’ means the same thing as ‘:if (not foo)’.  File: use-package.info, Node: load-path, Next: mode interpreter, Prev: if when unless, Up: Keywords 4.15 ‘:load-path’ ================= If your package needs a directory added to the ‘load-path’ in order to load, use ‘:load-path’. This takes a symbol, a function, a string or a list of strings. If the path is relative, it is expanded within ‘user-emacs-directory’: (use-package ess-site :load-path "site-lisp/ess/lisp/" :commands R) Note that when using a symbol or a function to provide a dynamically generated list of paths, you must inform the byte-compiler of this definition so the value is available at byte-compilation time. This is done by using the special form ‘eval-and-compile’ (as opposed to ‘eval-when-compile’). Further, this value is fixed at whatever was determined during compilation, to avoid looking up the same information again on each startup: (eval-and-compile (defun ess-site-load-path () (shell-command "find ~ -path ess/lisp"))) (use-package ess-site :load-path (lambda () (list (ess-site-load-path))) :commands R)  File: use-package.info, Node: mode interpreter, Next: magic magic-fallback, Prev: load-path, Up: Keywords 4.16 ‘:mode’, ‘:interpreter’ ============================ Similar to ‘:bind’, you can use ‘:mode’ and ‘:interpreter’ to establish a deferred binding within the ‘auto-mode-alist’ and ‘interpreter-mode-alist’ variables. The specifier to either keyword can be a cons cell, a list of cons cells, or a string or regexp: (use-package ruby-mode :mode "\\.rb\\'" :interpreter "ruby") ;; The package is "python" but the mode is "python-mode": (use-package python :mode ("\\.py\\'" . python-mode) :interpreter ("python" . python-mode)) If you aren’t using ‘:commands’, ‘:bind’, ‘:bind*’, ‘:bind-keymap’, ‘:bind-keymap*’, ‘:mode’, or ‘:interpreter’ (all of which imply ‘:defer’; see the docstring for ‘use-package’ for a brief description of each), you can still defer loading with the ‘:defer’ keyword: (use-package ace-jump-mode :defer t :init (autoload 'ace-jump-mode "ace-jump-mode" nil t) (bind-key "C-." 'ace-jump-mode)) This does exactly the same thing as the following: (use-package ace-jump-mode :bind ("C-." . ace-jump-mode))  File: use-package.info, Node: magic magic-fallback, Next: no-require, Prev: mode interpreter, Up: Keywords 4.17 ‘:magic’, ‘:magic-fallback’ ================================ Similar to ‘:mode‘ and ‘:interpreter‘, you can also use ‘:magic‘ and ‘:magic-fallback‘ to cause certain function to be run if the beginning of a file matches a given regular expression. The difference between the two is that ‘:magic-fallback‘ has a lower priority than ‘:mode‘. For example: “‘ elisp (use-package pdf-tools :load-path "site-lisp/pdf-tools/lisp" :magic ("%PDF" . pdf-view-mode) :config (pdf-tools-install)) “‘ This registers an autoloaded command for ‘pdf-view-mode‘, defers loading of ‘pdf-tools‘, and runs ‘pdf-view-mode‘ if the beginning of a buffer matches the string ‘"%PDF"‘.  File: use-package.info, Node: no-require, Next: requires, Prev: magic magic-fallback, Up: Keywords 4.18 ‘:no-require’ ================== Normally, ‘use-package’ will load each package at compile time before compiling the configuration, to ensure that any necessary symbols are in scope to satisfy the byte-compiler. At times this can cause problems, since a package may have special loading requirements, and all that you want to use ‘use-package’ for is to add a configuration to the ‘eval-after-load’ hook. In such cases, use the ‘:no-require’ keyword: (use-package foo :no-require t :config (message "This is evaluated when `foo' is loaded"))  File: use-package.info, Node: requires, Prev: no-require, Up: Keywords 4.19 ‘:requires’ ================ While the ‘:after’ keyword delays loading until the dependencies are loaded, the somewhat simpler ‘:requires’ keyword simply never loads the package if the dependencies are not available at the time the ‘use-package’ declaration is encountered. By "available" in this context it means that ‘foo’ is available of ‘(featurep 'foo)’ evaulates to a non-nil value. For example: (use-package abbrev :requires foo) This is the same as: (use-package abbrev :if (featurep 'foo)) As a convenience, a list of such packages may be specified: (use-package abbrev :requires (foo bar baz)) For more complex logic, such as that supported by ‘:after’, simply use ‘:if’ and the appropriate Lisp expression.  File: use-package.info, Node: FAQ, Next: Debugging Tools, Prev: Keywords, Up: Top Appendix A FAQ ************** The next two nodes lists frequently asked questions. Please also use the *note Debugging Tools::. * Menu: * FAQ - How to ...?:: * FAQ - Issues and Errors::  File: use-package.info, Node: FAQ - How to ...?, Next: FAQ - Issues and Errors, Up: FAQ A.1 FAQ - How to ...? ===================== * Menu: * This is a question::  File: use-package.info, Node: This is a question, Up: FAQ - How to ...? A.1.1 This is a question ------------------------ This is an answer.  File: use-package.info, Node: FAQ - Issues and Errors, Prev: FAQ - How to ...?, Up: FAQ A.2 FAQ - Issues and Errors =========================== * Menu: * This is an issues::  File: use-package.info, Node: This is an issues, Up: FAQ - Issues and Errors A.2.1 This is an issues ----------------------- This is a description.  File: use-package.info, Node: Debugging Tools, Next: Command Index, Prev: FAQ, Up: Top B Debugging Tools ***************** TODO Please also see the *note FAQ::.  File: use-package.info, Node: Command Index, Next: Function Index, Prev: Debugging Tools, Up: Top Appendix C Command Index ************************  File: use-package.info, Node: Function Index, Next: Variable Index, Prev: Command Index, Up: Top Appendix D Function Index *************************  File: use-package.info, Node: Variable Index, Prev: Function Index, Up: Top Appendix E Variable Index *************************  Tag Table: Node: Top784 Node: Introduction2819 Node: Installation3306 Node: Installing from an Elpa Archive3658 Node: Installing from the Git Repository4773 Node: Post-Installation Tasks6309 Node: Getting Started7022 Node: Keywords7194 Node: after8113 Node: bind-keymap bind-keymap*9645 Node: bind bind*10698 Node: Binding to local keymaps12738 Node: commands13829 Node: preface init config13971 Node: custom16049 Node: custom-face16489 Node: defer demand16809 Node: defines functions17621 Node: diminish delight18766 Node: disabled20709 Node: ensure pin21204 Node: hook23934 Node: if when unless25352 Node: load-path26298 Node: mode interpreter27444 Node: magic magic-fallback28755 Node: no-require29600 Node: requires30304 Node: FAQ31191 Node: FAQ - How to ...?31474 Node: This is a question31646 Node: FAQ - Issues and Errors31794 Node: This is an issues31977 Node: Debugging Tools32132 Node: Command Index32306 Node: Function Index32462 Node: Variable Index32619  End Tag Table  Local Variables: coding: utf-8 End: