[elpa] scratch/hook-helpers 365d8de 19/19: Add 'packages/hook-helpers/' from commit 'ff95f4944f3d6d1a43aca141cb7fa36a9043704d'

[Ian Dunn]

branch: scratch/hook-helpers
commit 365d8de11cd0347b7963cbcb06f5717e693c1813
Merge: 8e045bc ff95f49
Author: Ian Dunn <address@hidden>
Commit: Ian Dunn <address@hidden>

    Add 'packages/hook-helpers/' from commit 
'ff95f4944f3d6d1a43aca141cb7fa36a9043704d'
    
    git-subtree-dir: packages/hook-helpers
    git-subtree-mainline: 8e045bc69e918519d716f272a9f3b8e5e4fadf77
    git-subtree-split: ff95f4944f3d6d1a43aca141cb7fa36a9043704d
---
 packages/hook-helpers/.gitignore            |   2 +
 packages/hook-helpers/.hgignore             |   5 +
 packages/hook-helpers/COPYING               | 674 ++++++++++++++++++++++++++++
 packages/hook-helpers/Makefile              |  58 +++
 packages/hook-helpers/hook-helpers-tests.el |  95 ++++
 packages/hook-helpers/hook-helpers.el       | 250 +++++++++++
 packages/hook-helpers/hook-helpers.org      | 150 +++++++
 7 files changed, 1234 insertions(+)

diff --git a/packages/hook-helpers/.gitignore b/packages/hook-helpers/.gitignore
new file mode 100644
index 0000000..1af0c54
--- /dev/null
+++ b/packages/hook-helpers/.gitignore
@@ -0,0 +1,2 @@
+*.elc
+hook-helpers.html
\ No newline at end of file
diff --git a/packages/hook-helpers/.hgignore b/packages/hook-helpers/.hgignore
new file mode 100644
index 0000000..c7d4bff
--- /dev/null
+++ b/packages/hook-helpers/.hgignore
@@ -0,0 +1,5 @@
+syntax: glob
+
+# Ignore compiled Emacs lisp files
+*.elc
+hook-helpers-autoloads.el
\ No newline at end of file
diff --git a/packages/hook-helpers/COPYING b/packages/hook-helpers/COPYING
new file mode 100644
index 0000000..94a9ed0
--- /dev/null
+++ b/packages/hook-helpers/COPYING
@@ -0,0 +1,674 @@
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+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it 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 program 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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/packages/hook-helpers/Makefile b/packages/hook-helpers/Makefile
new file mode 100644
index 0000000..9a91f34
--- /dev/null
+++ b/packages/hook-helpers/Makefile
@@ -0,0 +1,58 @@
+# This is part of Hook Helpers
+#
+#  Copyright (C) 2016 Ian Dunn
+#  Copyright (C) 2017 Free Software Foundation, Inc.
+#
+#  This program is free software: you can redistribute it 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 program 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.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+EMACS=emacs --batch
+ALLSRC=hook-helpers.el
+SOURCE=$(ALLSRC)
+TARGET=$(patsubst %.el,%.elc,$(SOURCE))
+
+all: $(TARGET)
+
+compile: $(TARGET)
+
+%.elc: %.el
+       @$(EMACS) \
+       -L "." \
+       -f batch-byte-compile $<
+
+autoloads: hook-helpers-autoloads.el
+
+hook-helpers-autoloads.el:
+       @$(EMACS) \
+       --eval "(require 'package)" \
+       --eval "(setq inhibit-message t)" \
+       --eval "(package-generate-autoloads \"hook-helpers\" \"$$(pwd)\")"
+
+clean:
+       -rm -f *.elc
+
+check: compile
+       @$(EMACS) \
+       -L "." \
+       --load "ert" \
+       --load "hook-helpers-tests.el" \
+       -f ert-run-tests-batch-and-exit
+
+help:
+       $(info )
+       $(info make all       - Default)
+       $(info make compile   - Compile Emacs Lisp Files)
+       $(info make autoloads - Generate Autoloads)
+       $(info make clean     - Remove generated .elc files)
+       $(info make check     - Run Tests)
+       @echo ""
diff --git a/packages/hook-helpers/hook-helpers-tests.el 
b/packages/hook-helpers/hook-helpers-tests.el
new file mode 100644
index 0000000..d3b446a
--- /dev/null
+++ b/packages/hook-helpers/hook-helpers-tests.el
@@ -0,0 +1,95 @@
+;;; hook-helpers-tests.el --- Tests for hook helpers
+
+;; Copyright (C) 2016 Ian Dunn
+;; Copyright (C) 2017 Free Software Foundation, Inc.
+
+;; Author: Ian Dunn <address@hidden>
+;; Keywords: development, hooks
+;; URL: https://savannah.nongnu.org/projects/hook-helpers-el/
+;; Version: 1.1
+
+;; This program is free software: you can redistribute it 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 program 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.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'hook-helpers)
+(require 'ert)
+
+(ert-deftest hkhlp-normalize-hook-spec-test ()
+  (should (equal (hkhlp-normalize-hook-spec 'c++-mode-hook)
+                 '((c++-mode-hook))))
+  (should (equal (hkhlp-normalize-hook-spec '(c++-mode-hook . t))
+                 '((c++-mode-hook . t))))
+  (should (equal (hkhlp-normalize-hook-spec '(c++-mode-hook org-mode-hook))
+                 '((c++-mode-hook) (org-mode-hook))))
+  (should (equal (hkhlp-normalize-hook-spec '((c++-mode-hook . t) 
org-mode-hook))
+                 '((c++-mode-hook . t) (org-mode-hook))))
+  (should (equal (hkhlp-normalize-hook-spec '(c++-mode-hook (org-mode-hook . 
t)))
+                 '((c++-mode-hook) (org-mode-hook . t))))
+  (should (equal (hkhlp-normalize-hook-spec '((c++-mode-hook . t)
+                                              (org-mode-hook . t)))
+                 '((c++-mode-hook . t) (org-mode-hook . t))))
+  (should (equal (hkhlp-normalize-hook-spec '((c++-mode-hook . t)))
+                 '((c++-mode-hook . t)))))
+
+(ert-deftest hkhlp-create-hook-helper-test ()
+  (let ((test-hook nil))
+    (create-hook-helper test-helper ()
+      "Test Hook Helper"
+      :hooks (test-hook)
+      (message "This is a test"))
+    (should (equal test-hook (list
+                              (lambda () "Test Hook Helper" (message "This is 
a test")))))))
+
+(ert-deftest hkhlp-add-hook-helper ()
+  (let ((test-hook nil)
+        (test-2-hook nil))
+    (create-hook-helper test-helper ()
+      "Test Hook Helper"
+      :hooks (test-hook)
+      (message "This is a test"))
+    (should (equal test-hook (list
+                              (lambda () "Test Hook Helper" (message "This is 
a test")))))
+    (add-hook-helper 'test-helper '(test-2-hook))
+    (should (equal test-2-hook test-hook))))
+
+(ert-deftest hkhlp-remove-hook-helper ()
+  (let ((test-hook nil))
+    (create-hook-helper test-helper ()
+      "Test Hook Helper"
+      :hooks (test-hook)
+      (message "This is a test"))
+    (should (equal test-hook (list
+                              (lambda () "Test Hook Helper" (message "This is 
a test")))))
+    (remove-hook-helper 'test-helper 'test-hook)
+    (should (equal test-hook nil))))
+
+(ert-deftest hkhlp-update-hook-helper ()
+  (let ((test-hook nil)
+        (old-func (lambda () "Test Hook Helper" (message "This is a test")))
+        (new-func (lambda () "Test Hook Helper" (message "This is another 
test"))))
+    (create-hook-helper test-helper ()
+      "Test Hook Helper"
+      :hooks (test-hook)
+      (message "This is a test"))
+    (should (equal test-hook (list old-func)))
+    (create-hook-helper test-helper ()
+      "Test Hook Helper"
+      :hooks (test-hook)
+      (message "This is another test"))
+    (should (equal test-hook (list new-func)))))
+
+;;; hook-helpers-tests.el ends here
diff --git a/packages/hook-helpers/hook-helpers.el 
b/packages/hook-helpers/hook-helpers.el
new file mode 100644
index 0000000..9772049
--- /dev/null
+++ b/packages/hook-helpers/hook-helpers.el
@@ -0,0 +1,250 @@
+;;; hook-helpers.el --- Anonymous, modifiable hook functions -*- 
lexical-binding: t; -*-
+
+;; Copyright (C) 2016 Ian Dunn
+;; Copyright (C) 2017 Free Software Foundation, Inc.
+
+;; Author: Ian Dunn <address@hidden>
+;; Maintainer: Ian Dunn <address@hidden>
+;; Keywords: development, hooks
+;; Package-Requires: ((emacs "25.1"))
+;; URL: https://savannah.nongnu.org/projects/hook-helpers-el/
+;; Version: 1.1beta1
+;; Created: 06 May 2016
+;; Modified: 23 Apr 2017
+
+;; This program is free software: you can redistribute it 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 program 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.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; Often times, I see people define a function to be used once in a hook.  If
+;; they don’t do this, then it will be an anonymous function.  If the anonymous
+;; function is modified, then the function can’t be removed.  With a function
+;; outside of the `add-hook' call, it looks messy.
+
+;; Hook Helpers are a solution to this.  A "hook helper" is an anonymous,
+;; modifiable function created for the sole purpose of being attached to a 
hook.
+;; This combines the two commonly used methods mentioned above.  The functions
+;; don't exist, so they don't get in the way of `describe-function', but they
+;; can be removed or modified as needed.
+
+;;; Code:
+
+(require 'subr-x)
+
+(defvar hkhlp--helpers-map nil
+  "Map of IDs to helpers.")
+
+(cl-defstruct hook-helper
+  id function hooks source-file)
+
+(defun hkhlp-normalize-hook-spec (hook-spec &optional recursed)
+  "Turns HOOK-SPEC into a list of cons-cells, each one (HOOK . APPEND)
+
+HOOK is the name of the full variable to use
+APPEND is a Boolean"
+  (cond
+   ((symbolp hook-spec)
+    ;; HOOK
+    (list (cons hook-spec nil)))
+   ((and (consp hook-spec)
+         (symbolp (car hook-spec))
+         (booleanp (cdr hook-spec)))
+    ;; (HOOK . APPEND)
+    (list hook-spec))
+   ((and (listp hook-spec) (not recursed))
+    ;; List of specs
+    (mapcar (lambda (spec) (car (hkhlp-normalize-hook-spec spec t))) 
hook-spec))
+   (t
+    (warn "Unrecognized hook-spec %s" hook-spec))))
+
+(defun add-hook-helper (id hook-spec)
+  "Adds an existing helper ID to HOOK-SPEC."
+  (let ((normalized-spec (hkhlp-normalize-hook-spec hook-spec))
+        (helper (alist-get id hkhlp--helpers-map)))
+    (pcase-dolist (`(,hook . ,append) normalized-spec)
+      (add-hook hook (hook-helper-function helper) append)
+      (cl-pushnew hook (hook-helper-hooks helper) :test 'equal))))
+
+(defun remove-hook-helper (id hook-spec)
+  "Removes the helper ID from each element of HOOK-SPEC."
+  (let ((normalized-spec (hkhlp-normalize-hook-spec hook-spec))
+        (helper (alist-get id hkhlp--helpers-map)))
+    (pcase-dolist (`(,hook . _) normalized-spec)
+      (remove-hook hook (hook-helper-function helper))
+      (cl-delete hook (hook-helper-hooks helper) :test 'equal))))
+
+(cl-defmethod hkhlp-update-helper ((old hook-helper) (new hook-helper))
+  "Updates instances of OLD to NEW.
+
+For each hook HOOK in the original:
+
+  - If HOOK is not in NEW, remove OLD from it
+  - Else, update OLD to NEW
+"
+  (let* ((old-func (hook-helper-function old))
+         (new-func (hook-helper-function new))
+         (old-hooks (hook-helper-hooks old))
+         (new-hooks (hook-helper-hooks new)))
+    (dolist (hook old-hooks)
+      (let ((hook-val (and (boundp hook) (symbol-value hook))))
+        (cond
+         ((not hook-val) nil)
+         ((member hook new-hooks)
+          ;; Update the helper in hooks
+          (when-let ((elt (cl-position old-func hook-val :test 'equal)))
+            (setf (nth elt hook-val) new-func)))
+         (t
+          ;; Delete the helper from the hooks
+          (cl-delete old-func (symbol-value hook) :test 'equal)))))))
+
+;;;###autoload
+(defmacro create-hook-helper (id args &optional docstring &rest body)
+  "Creates a new hook helper ID for the hooks in HOOKS.
+
+If a hook helper with id ID already exists, it's overridden.  All instances of
+the helper in its associated hooks are replaced.
+
+See `hkhlp-normalize-hook-spec' for an explanation of HOOKS.
+
+\(fn ID ARGS &optional DOCSTRING &keys HOOKS &rest BODY)"
+  (declare (indent defun) (doc-string 3))
+  (when (and docstring (not (stringp docstring)))
+    ;; Some trickiness, since what appears to be the docstring may really be
+    ;; the first element of the body.
+    (push docstring body)
+    (setq docstring nil))
+  ;; Process the key words
+  (let ((hook-spec nil))
+    (while (keywordp (car body))
+      (pcase (pop body)
+       (`:hooks (setq hook-spec (pop body)))
+       (_ (pop body))))
+    `(let* ((id-sym (quote ,id))
+            (func (lambda ,args ,docstring ,@body))
+            (normalized-hooks (hkhlp-normalize-hook-spec (quote ,hook-spec)))
+            (source-file ,(or load-file-name buffer-file-name))
+            (helper (make-hook-helper :id id-sym
+                                      :function func
+                                      :source-file source-file
+                                      :hooks (mapcar 'car normalized-hooks))))
+       ;; Update an old helper
+       (when-let ((old-helper (alist-get id-sym hkhlp--helpers-map)))
+         (hkhlp-update-helper old-helper helper))
+       (setf (alist-get id-sym hkhlp--helpers-map) helper)
+       ;; Add to the new hook-spec
+       (add-hook-helper id-sym (quote ,hook-spec)))))
+
+;;;###autoload
+(defmacro define-hook-helper (hook args &optional docstring &rest body)
+  "Define a hook helper for the variable HOOK-hook with ARGS as the argument 
list.
+
+This helper consists of all the code in BODY.  HOOK should not be
+quoted.  The keywords are:
+
+:name    Specifies a name to use for the generated function.  As part
+         of this macro, a function called hook-helper--HOOK will be
+         created.  If NAME is given, then the function becomes
+         ‘hook-helper--HOOK/NAME’.
+
+:append  If non-nil, append the hook helper to the hook variable.
+
+:suffix  Allows a user to specify that the hook variable doesn't
+         end with ‘-hook’, but instead with another suffix, such as
+         ‘-function’.  SUFFIX should be a string, and defaults to ‘hook’
+         if not specified.  Note that SUFFIX is not assumed to start with
+         a hyphen."
+  (declare (indent defun) (doc-string 3))
+  ;; From `define-derived-mode'
+  (when (and docstring (not (stringp docstring)))
+    ;; Some trickiness, since what appears to be the docstring may really be
+    ;; the first element of the body.
+    (push docstring body)
+    (setq docstring nil))
+  ;; Process the key words
+  (let ((name nil)
+        (append nil)
+        (suffix "hook"))
+    (while (keywordp (car body))
+      (pcase (pop body)
+       (`:name (setq name (pop body)))
+       (`:append (setq append (pop body)))
+       (`:suffix (setq suffix (pop body)))
+       (_ (pop body))))
+    (let* ((suffix-string (if (stringp suffix) suffix (symbol-name suffix)))
+           (hook-name (concat (symbol-name hook) "-" suffix-string))
+           (func-sym (intern (format "%s%s" hook-name
+                                     (if name (concat "/" (symbol-name name)) 
""))))
+           (hook (intern hook-name)))
+      `(create-hook-helper ,func-sym ,args
+         ,docstring
+         :hooks (,hook . ,append)
+         ,@body))))
+
+;;;###autoload
+(defmacro define-hook-function (function args &optional docstring &rest body)
+  "Define FUNCTION to be a function, then add it to hooks.
+
+The hooks to add are specified by the :hooks keyword.  This is a
+simple list of hooks, unquoted, and the new function is added to
+each one."
+  (declare (indent defun)
+           (doc-string 3)
+           (obsolete create-hook-helper "1.1"))
+  `(create-hook-helper ,function ,args ,docstring ,@body))
+
+;; TODO Link to source file
+(cl-defmethod hkhlp--pp ((helper hook-helper) indent)
+  (let* ((func (hook-helper-function helper))
+         (pp-string (pp-to-string func))
+         (id (hook-helper-id helper))
+         (id-name (symbol-name id))
+         (indent (max (+ (length id-name) 1) indent))
+         (indent-first (- indent (length id-name)))
+         (pp-lines (split-string pp-string "\n" t)))
+    (concat (symbol-name id) (make-string indent-first ?\ ) (car pp-lines) "\n"
+            (mapconcat
+             (lambda (str)
+               (concat (make-string indent ?\ )
+                       str))
+             (cdr pp-lines)
+             "\n")
+            "\n\n")))
+
+(defun describe-hook-helpers ()
+  "Describe the currently defined hook helpers."
+  (interactive)
+  (let ((hook-alist nil))
+    (pcase-dolist (`(_ . ,helper) hkhlp--helpers-map)
+      (dolist (hook (hook-helper-hooks helper))
+        (push helper (alist-get hook hook-alist))))
+    (with-output-to-temp-buffer "*Hook Helpers*"
+      (pcase-dolist (`(,hook . ,helpers) hook-alist)
+        (princ (format "%s\n%s\n" hook (make-string 40 ?-)))
+        (dolist (helper helpers)
+          (princ (hkhlp--pp helper 16)))
+        (princ "\n")))))
+
+;; Add font lock for both macros.
+(font-lock-add-keywords
+ 'emacs-lisp-mode
+ '(("(\\(define-hook-helper\\)\\_>[ \t]*\\(\\(?:\\sw\\|\\s_\\)+\\)?"
+    (1 font-lock-keyword-face)
+    (2 font-lock-function-name-face nil t))
+   ("(\\(create-hook-helper\\)\\_>[ \t]*\\(\\(?:\\sw\\|\\s_\\)+\\)?"
+    (1 font-lock-keyword-face)
+    (2 font-lock-function-name-face nil t))))
+
+(provide 'hook-helpers)
+
+;;; hook-helpers.el ends here
diff --git a/packages/hook-helpers/hook-helpers.org 
b/packages/hook-helpers/hook-helpers.org
new file mode 100644
index 0000000..4a72ce1
--- /dev/null
+++ b/packages/hook-helpers/hook-helpers.org
@@ -0,0 +1,150 @@
+#+TITLE: Hook Helpers
+#+AUTHOR: Ian Dunn
+#+EMAIL: address@hidden
+
+* Copying
+Copyright (C) 2016 Ian Dunn
+Copyright (C) 2017 Free Software Foundation, Inc.
+
+#+BEGIN_QUOTE
+This program is free software: you can redistribute it 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 program 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.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#+END_QUOTE
+* Introduction
+
+[[https://savannah.nongnu.org/projects/hook-helpers-el/][Savannah Project]]
+
+Often times, I see people define a function to be used once in a hook.  If
+they don’t do this, then it will be an anonymous function.  If the anonymous
+function is modified, then the function can’t be removed.  With a function
+outside of the ~add-hook~ call, it looks messy.
+
+Hook Helpers are a solution to this.  A "hook helper" is an anonymous,
+modifiable function created for the sole purpose of being attached to a hook.
+This combines the two commonly used methods mentioned above.  The functions
+don't exist, so they don't get in the way of ~C-h f~, but they can be removed 
or
+modified as needed.
+
+* Installation
+
+Hook Helpers requires Emacs 25.1 or later.
+
+To install hook helpers, you can clone from the git repo:
+
+#+BEGIN_SRC shell
+git clone https://git.savannah.gnu.org/git/hook-helpers-el hook-helpers
+make -C hook-helpers compile autoloads
+#+END_SRC
+
+After that, setup is easy.  Just add the following to your .emacs file (or
+equivalent):
+
+#+BEGIN_SRC emacs-lisp
+(add-to-list 'load-path "/path/to/hook-helpers")
+(load "/path/to/hook-helpers/hook-helpers-autoloads.el")
+#+END_SRC
+
+* Examples
+Let's look at some examples.
+
+Without using a hook helper, one must do the following:
+
+#+BEGIN_SRC emacs-lisp
+(defun my/after-init-hook ()
+  (set-scroll-bar-mode nil))
+(add-hook 'after-init-hook 'my/after-init-hook)
+#+END_SRC
+
+If you forget the ~add-hook~ call, then this doesn't do any good.  
Alternatively,
+you can use a lambda function:
+
+#+BEGIN_SRC emacs-lisp
+(add-hook 'after-init-hook (lambda () (set-scroll-bar-mode nil)))
+#+END_SRC
+
+But then if you want to modify the function, it's permanently stuck on the
+after-init-hook variable, and you have to deal with it.  It's not a problem for
+after-init-hook, which is used once, but would be a problem for a mode hook,
+like text-mode-hook.
+
+With a hook helper, this is reduced to the following:
+
+#+BEGIN_SRC emacs-lisp
+(define-hook-helper after-init ()
+  (set-scroll-bar-mode nil))
+#+END_SRC
+
+Which handles everything for you.
+
+* In-Depth Usage
+There are two macros in hook helpers: ~define-hook-helper~ and 
~create-hook-helper~.
+
+The former is a basic case; it creates and adds a helper for a single hook.
+Most hooks have the -hook suffix, so we take advantage of that here for a 
little
+less typing.  In order to add a helper to a non-standard hook, use the 
~:suffix~
+argument:
+
+#+BEGIN_SRC emacs-lisp
+(define-hook-helper my ()
+  :suffix function
+  :append t
+  (message "Hello!"))
+#+END_SRC
+
+We also introduce the ~:append~ keyword above, which does exactly what it 
sounds
+like.
+
+There's one more keyword for ~define-hook-helper~: ~:name~.  This specifies an
+additional name for the new helper.  Without this, its helper ID is just the
+name of the hook; with a ~:name~, its ID is HOOK-NAME/NAME.
+
+The work horse of hook helpers is ~create-hook-helper~.  This is the generic 
case,
+capable of adding itself to any number of hooks:
+
+#+BEGIN_SRC emacs-lisp
+(create-hook-helper new-helper ()
+  :hooks (hook-1-hook
+          (hook-2-hook . t)
+          hook-3-function)
+  (message "Look at all that we can do!"))
+#+END_SRC
+
+This creates a new hook helper called "new-helper", and adds it to 
~hook-1-hook~,
+~hook-2-hook~, and ~hook-3-function~, appending to the latter.
+
+The ~:hooks~ keyword can have the following form:
+
+- A single hook
+- A cons cell (HOOK . APPEND)
+- A list containing a mixture of the above two forms
+
+This is called a "hook spec".
+
+** Adding and Removing Helpers
+To add or remove helpers, the functions add-hook-helper and remove-hook-helper
+are provided.
+
+#+BEGIN_SRC emacs-lisp
+(add-hook-helper 'test-helper '(hook-the-first hook-the-second))
+(remove-hook-helper 'test-helper 'hook-the-second)
+#+END_SRC
+
+As you can see, each of them takes the same arguments: a symbol denoting the
+helper to add or remove, and a quoted hook spec.
+
+** Seeing all the Available Helpers
+
+Seeing lambda functions in your hooks can be confusing.  While we don't have a
+solution for that, we do have ~describe-hook-helpers~, an interactive function
+that creates a pretty buffer containing all the defined hook helpers, grouped 
by
+the hooks to which they are attached.