work in progress

* ui
** remove garbage
*** startup screen
#+BEGIN_SRC emacs-lisp
(setq inhibit-startup-screen t)
#+END_SRC
*** useless mouse widgets
#+BEGIN_SRC emacs-lisp
(tool-bar-mode -1)
(menu-bar-mode -1)
(scroll-bar-mode -1)
#+END_SRC
*** line wrap
#+BEGIN_SRC emacs-lisp
(set-default 'truncate-lines t)
#+END_SRC
*** autosave/backup files
#+BEGIN_SRC emacs-lisp
  (setq make-backup-files nil)
  (setq auto-save-default nil)
#+END_SRC
*** popup windows
#+BEGIN_SRC emacs-lisp
(setq pop-up-windows nil) ; no popups (eg ediff)
#+END_SRC
** pretty stuff
*** enable line/column numbering
#+BEGIN_SRC emacs-lisp
;; (global-linum-mode t)
(line-number-mode 1)
(column-number-mode 1)
#+END_SRC
*** tab width
#+BEGIN_SRC emacs-lisp
(setq-default tab-width 4)
#+END_SRC
*** smooth scrolling
#+BEGIN_SRC emacs-lisp
(setq scroll-conservatively 100)
#+END_SRC
*** pretty symbols
#+BEGIN_SRC emacs-lisp
  (add-hook 'ess-mode-hook #'prettify-symbols-mode)
  (add-hook 'inferior-ess-mode-hook #'prettify-symbols-mode)
  (add-hook 'prog-mode-hook #'prettify-symbols-mode)
#+END_SRC
*** highlight current line
#+BEGIN_SRC emacs-lisp
(when window-system (global-hl-line-mode t))
#+END_SRC
** yes-no prompt enhancement
#+BEGIN_SRC emacs-lisp
(defalias 'yes-or-no-p 'y-or-n-p) ; eliminate yes or no prompt on killing procs
#+END_SRC
** theme color selection
need this to:
a) apply the gui theme if gui is loaded as client and
b) ensure that the reloaded theme is only applied to the current frame

NOTE: this only works if we start term after gui, and term has light bg. not big deal for now since I hardly ever use term as client
#+BEGIN_SRC emacs-lisp
  (defvar my:theme 'spacemacs-dark)
  (defvar my:theme-window-loaded nil)
  (defvar my:theme-terminal-loaded nil)
  (if (daemonp)
      (add-hook 'after-make-frame-functions(lambda (frame)
                                             (select-frame frame)
                                             (if (window-system frame)
                                                 (unless my:theme-window-loaded
                                                   (if my:theme-terminal-loaded
                                                       (enable-theme my:theme)
                                                     (load-theme my:theme t))
                                                   (setq my:theme-window-loaded t))
                                               (unless my:theme-terminal-loaded
                                                 (if my:theme-window-loaded
                                                     (enable-theme my:theme)
                                                   (load-theme my:theme t))
                                                 (setq my:theme-terminal-loaded t)))))
    (progn
      (load-theme my:theme t)
      (if (display-graphic-p)
          (setq my:theme-window-loaded t)
        (setq my:theme-terminal-loaded t))))
#+END_SRC
* modeline
#+BEGIN_SRC emacs-lisp
  (use-package spaceline
    :ensure t
    :config
      (require 'spaceline-config)
      (setq powerline-default-separator (quote arrow))
      (spaceline-spacemacs-theme)
      (setq spaceline-buffer-size-p nil))
#+END_SRC
** dashboard
#+BEGIN_SRC emacs-lisp
;;  (use-package dashboard
;;    :ensure t
;;    :config
;;    (dashboard-setup-startup-hook)
;;     (setq dashboard-banner-logo-title "Emacs"))
     ;; (setq dashboard-items '((recents . 10))))
#+END_SRC
* keybindings
** overrides
#+BEGIN_SRC emacs-lisp
  (global-set-key (kbd "C-h a") 'apropos)
#+END_SRC
** modeless bindings
These are commands that should work in any mode. Make the assumption that function keys are pretty much free in any major/minor mode
#+BEGIN_SRC emacs-lisp
  (global-set-key (kbd "<f1>") 'org-agenda)
  (global-set-key (kbd "<f2>") 'org-capture)
  (global-set-key (kbd "<f3>") 'org-iswitchb)
#+END_SRC
* printing
** 
* packages
** delight
#+BEGIN_SRC emacs-lisp
  (use-package delight
    :ensure t)
#+END_SRC
** beacon
#+BEGIN_SRC emacs-lisp
  (use-package beacon
    :ensure t
    :delight
    :init
    (beacon-mode 1))
#+END_SRC
** whichkey
#+BEGIN_SRC emacs-lisp
  (use-package which-key
    :ensure t
    :delight
    :init
    (which-key-mode))
#+END_SRC
** ido
#+BEGIN_SRC emacs-lisp
  (use-package ido
    :ensure t
    :bind
    ("C-x C-b" . 'ido-switch-buffer)
    ("C-x b" . 'ibuffer)
    :config
    (ido-mode 1)
    (setq ido-everywhere t)
    (setq ido-enable-flex-matching t)
    (setq ido-max-directory-size 100000)
    (setq ido-default-file-method 'selected-window)
    (setq ido-default-buffer-method 'selected-window)
    (use-package ido-vertical-mode
      :ensure t
      :init
      (ido-vertical-mode 1)
      (setq ido-vertical-define-keys 'C-n-and-C-p-only)))


    ;; (setq ido-file-extensions-order '(".org" ".txt" ".py" ".emacs" ".xml" ".el" ".ini" ".cfg" ".cnf"))
#+END_SRC
** smex
#+BEGIN_SRC emacs-lisp
  (use-package smex
    :ensure t
    :init
    (smex-initialize)
    :bind
    ("M-x" . 'smex)
    ("M-X" . 'smex-major-mode-commands))
#+END_SRC
** rainbow-delimiters
#+BEGIN_SRC emacs-lisp
  (use-package rainbow-delimiters
    :ensure t
    :delight
    :init
      (add-hook 'prog-mode-hook #'rainbow-delimiters-mode)
      (add-hook 'inferior-ess-mode-hook #'rainbow-delimiters-mode)
      (add-hook 'ess-mode-hook #'rainbow-delimiters-mode))
#+END_SRC
** ace-window
#+BEGIN_SRC emacs-lisp
  (use-package ace-window
    :ensure t
    :bind ("M-o" . ace-window)
    :config (setq aw-background nil))
#+END_SRC
** avy
#+BEGIN_SRC emacs-lisp
  (use-package avy
    :ensure t
    :bind ("M-s" . avy-goto-char)
    :config (setq avy-background t))
#+END_SRC
** sudo edit
#+BEGIN_SRC emacs-lisp
  (use-package sudo-edit
    :ensure t
    :bind ("C-c s" . sudo-edit))
#+END_SRC
** typit
#+BEGIN_SRC emacs-lisp
  (use-package typit
    :init
    :ensure t)
#+END_SRC
** calfw
#+BEGIN_SRC emacs-lisp
  (use-package calfw
    :init
    :ensure t)
#+END_SRC
** evil
*** packages
#+BEGIN_SRC emacs-lisp
  (use-package evil
    :ensure t
    :config
    (evil-mode 1)
    (use-package evil-org
      :ensure t
      :after org
      :delight
      :config
      (add-hook 'org-mode-hook 'evil-org-mode)
      (add-hook 'evil-org-mode-hook
                (lambda ()
                  (evil-org-set-key-theme)))
      (require 'evil-org-agenda)
      (evil-org-agenda-set-keys)))
#+END_SRC
*** keybindings
vim is all about escape, not...ctrl+g???
+BEGIN_SRC emacs-lisp
  (define-key evil-normal-state-map [escape] 'keyboard-quit)
  (define-key evil-visual-state-map [escape] 'keyboard-quit)

  ;; since ctrl+g and evil make no sense
  (defun nd/minibuffer-keyboard-quit ()
    "Abort recursive edit.
  In Delete Selection mode, if the mark is active, just deactivate it;
  then it takes a second \\[keyboard-quit] to abort the minibuffer."
    (interactive)
    (if (and delete-selection-mode transient-mark-mode mark-active)
        (setq deactivate-mark  t)
      (when (get-buffer "*Completions*") (delete-windows-on "*Completions*"))
      (abort-recursive-edit)))

  (define-key minibuffer-local-ns-map [escape] 'minibuffer-keyboard-quit)
  (define-key minibuffer-local-completion-map [escape] 'minibuffer-keyboard-quit)
  (define-key minibuffer-local-must-match-map [escape] 'minibuffer-keyboard-quit)
  (define-key minibuffer-local-isearch-map [escape] 'minibuffer-keyboard-quit)
#+END_SRC
** undo tree
#+BEGIN_SRC emacs-lisp
  (use-package undo-tree
    :ensure t
    :delight
    :config
    (global-undo-tree-mode)
    (setq undo-tree-visualizer-diff t))
#+END_SRC
* library
A place for duct tape code that I developed (or lovingly stole from others)
** macros
#+BEGIN_SRC emacs-lisp
;; lovingly stolen from aaron harris
(defmacro nd/with-advice (adlist &rest body)
  "Execute BODY with temporary advice in ADLIST.

Each element of ADLIST should be a list of the form
  (SYMBOL WHERE FUNCTION [PROPS])
suitable for passing to `advice-add'.  The BODY is wrapped in an
`unwind-protect' form, so the advice will be removed even in the
event of an error or nonlocal exit."
  (declare (debug ((&rest (&rest form)) body))
           (indent 1))
  `(progn
     ,@(mapcar (lambda (adform)
                 (cons 'advice-add adform))
               adlist)
     (unwind-protect (progn ,@body)
       ,@(mapcar (lambda (adform)
                   `(advice-remove ,(car adform) ,(nth 2 adform)))
                 adlist))))
#+END_SRC
* custom functions
** follow window splitting
#+BEGIN_SRC emacs-lisp
(defun split-and-follow-horizontally ()
    (interactive)
    (split-window-below)
    (balance-windows)
    (other-window 1))
(global-set-key (kbd "C-x 2") 'split-and-follow-horizontally)

(defun split-and-follow-vertically ()
    (interactive)
    (split-window-right)
    (balance-windows)
    (other-window 1))
(global-set-key (kbd "C-x 3") 'split-and-follow-vertically)
#+END_SRC
** config edit and reload
*** edit
#+BEGIN_SRC emacs-lisp
(defun config-visit ()
(interactive)
(find-file "~/.emacs.d/conf.org"))
(global-set-key (kbd "C-c e") 'config-visit)
#+END_SRC
*** reload
#+BEGIN_SRC emacs-lisp
(defun config-reload ()
"Reloads ~/.emacs.d/conf.org at runtime"
(interactive)
(org-babel-load-file (expand-file-name "~/.emacs.d/conf.org")))
(global-set-key (kbd "C-c r") 'config-reload)
#+END_SRC
** custom keybindings
*** delete whole line
#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "C-S-w") 'fc/delete-whole-line)
(defun fc/delete-whole-line ()
"Delete the whole line without flooding the kill ring"
(interactive)
(delete-region (progn (forward-line 0) (point))
                (progn (forward-line 1) (point))))
#+END_SRC
*** delete word forward
#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "M-d") 'fc/delete-word-forward)
(defun fc/delete-word-forward (arg)
"Delete word forward without flooding the kill ring"
(interactive "p")
(delete-region (point) (progn (forward-word arg) (point))))
#+END_SRC
*** delete word backward
#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "<M-backspace>") 'fc/delete-word-backward)
(defun fc/delete-word-backward (arg)
"Delete word backward without flooding the kill ring"
(interactive "p")
(delete-region (point) (progn (backward-word arg) (point))))
#+END_SRC
*** duplicate line
#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "C-c C-d") 'fc/duplicate-current-line-or-region)
(defun fc/duplicate-current-line-or-region (arg)
    "Duplicates the current line or region ARG times."
    (interactive "p")
    (let (beg end (origin (point)))
    (if (and mark-active (> (point) (mark)))
        (exchange-point-and-mark))
    (setq beg (line-beginning-position))
    (if mark-active
        (exchange-point-and-mark))
    (setq end (line-end-position))
    (let ((region (buffer-substring-no-properties beg end)))
        (dotimes (i arg)
        (goto-char end)
        (newline)
        (insert region)
        (setq end (point))))))
#+END_SRC
    (goto-char (+ origin (* (length region) arg) arg)))))
* ess
#+begin_src emacs-lisp
(setq inferior-R-args "--quiet --no-save")
(load "ess-site")
(setq ess-history-file "session.Rhistory")
(setq ess-history-directory
	  (substitute-in-file-name "${XDG_CONFIG_HOME}/r/"))
#+END_SRC
* languages
** python
#+BEGIN_SRC 
(elpy-enable)

;; make python tabs 4 chars
(add-hook 'python-mode-hook
      (lambda ()
        (setq indent-tabs-mode t)
        (setq tab-width 4)
        (setq python-indent 4)))

#+END_SRC
* org-mode
** basic
#+BEGIN_SRC emacs-lisp
  (setq org-log-done t)
  (setq org-startup-indented t)
  (delight 'org-indent-mode)
  (setq org-directory "~/Org")
#+END_SRC
** ui
*** bullets
#+BEGIN_SRC emacs-lisp
(use-package org-bullets
  :ensure t
  :config
    (add-hook 'org-mode-hook (lambda () (org-bullets-mode))))
#+END_SRC
*** font height
The fonts in org headings bug me, make them smaller and less invasive
#+BEGIN_SRC emacs-lisp
  (defun nd/org-ui-heading-same-font-height ()
    (let ((heading-height 1.15))
      (set-face-attribute 'org-level-1 nil :weight 'bold :height heading-height)
      (set-face-attribute 'org-level-2 nil :weight 'semi-bold :height heading-height)
      (set-face-attribute 'org-level-3 nil :weight 'normal :height heading-height)
      (set-face-attribute 'org-level-4 nil :weight 'normal :height heading-height)
      (set-face-attribute 'org-level-5 nil :weight 'normal :height heading-height)))

  (add-hook 'org-mode-hook 'nd/org-ui-heading-same-font-height)
#+END_SRC
*** window splitting
Org mode is great and all, but the windows never show up in the right place
**** todo selection
I only need a teeny tiny window below my current window for todo selection
#+BEGIN_SRC emacs-lisp
  (defun nd/org-todo-position (buffer alist)
    (let ((win (car (cl-delete-if-not
                     (lambda (window)
                       (with-current-buffer (window-buffer window)
                         (memq major-mode
                               '(org-mode org-agenda-mode))))
                     (window-list)))))
      (when win
        (let ((new (split-window win -4 'below)))
          (set-window-buffer new buffer)
          new))))

  (defun nd/org-todo-window-advice (orig-fn)
    "Advice to fix window placement in `org-fast-todo-selection'."
    (let  ((override '("\\*Org todo\\*" nd/org-todo-position)))
      (add-to-list 'display-buffer-alist override)
      (nd/with-advice
          ((#'org-switch-to-buffer-other-window :override #'pop-to-buffer))
        (unwind-protect (funcall orig-fn)
          (setq display-buffer-alist
                (delete override display-buffer-alist))))))

  (advice-add #'org-fast-todo-selection :around #'nd/org-todo-window-advice)
#+END_SRC
**** tag selection
By default, the tag selection window obliterates all but the current window...how disorienting :/
#+BEGIN_SRC emacs-lisp
  (defun nd/org-tag-window-advice (orig-fn current inherited table &optional todo-table)
    "Advice to fix window placement in `org-fast-tags-selection'."
    (nd/with-advice
        ((#'delete-other-windows :override #'ignore)
         ;; pretty sure I just got lucky here...
         (#'split-window-vertically :override #'(lambda (&optional size)
                                                  (split-window-below (or size -9)))))
      (unwind-protect (funcall orig-fn current inherited table todo-table))))

  (advice-add #'org-fast-tag-selection :around #'nd/org-tag-window-advice)
#+END_SRC
** evil modes
#+BEGIN_SRC emacs-lisp
  ;;(add-hook 'org-capture-mode-hook 'evil-append)
#+END_SRC
** src
*** basic
#+BEGIN_SRC emacs-lisp
(setq org-src-window-setup 'current-window)
(setq org-src-fontify-natively t)
(setq org-edit-src-content-indentation 0)
#+END_SRC
*** snippets
#+BEGIN_SRC emacs-lisp
(add-to-list 'org-structure-template-alist
             '("el" "#+BEGIN_SRC emacs-lisp\n?\n#+END_SRC"))
#+END_SRC
** keyboard shortcuts
*** navigation
#+BEGIN_SRC emacs-lisp
(setq org-special-ctrl-a/e t)
(setq org-special-ctrl-k t)
(setq org-yank-adjusted-subtrees t)
#+END_SRC
*** custom
#+BEGIN_SRC emacs-lisp
  (add-hook 'org-mode-hook
            (lambda ()
              (local-set-key (kbd "C-c C-x x") 'nd/mark-subtree-done)
              (local-set-key (kbd "C-c C-x c") 'nd/org-clone-subtree-with-time-shift-reset)))
#+END_SRC
*** agenda
#+BEGIN_SRC emacs-lisp
  (evil-define-key 'motion org-agenda-mode-map
    "t" 'nd/toggle-project-toplevel-display
    "D" 'org-agenda-day-view
    "W" 'org-agenda-week-view
    "M" 'org-agenda-month-view
    "Y" 'org-agenda-year-view
    "ct" nil
    "sC" 'nd/org-agenda-filter-non-context
    "e" 'org-agenda-set-effort
    "ce" nil)

  (add-hook 'org-agenda-mode-hook
            (lambda ()
              (local-set-key (kbd "C-c C-c") 'org-agenda-set-tags)))
#+END_SRC
** todo states
*** sequences
#+BEGIN_SRC emacs-lisp
  (setq org-todo-keywords
        '((sequence "TODO(t)" "NEXT(n)" "|" "DONE(d)")
          (sequence "WAIT(w@/!)" "HOLD(h@/!)" "|" "CANC(c@/!)")))
#+END_SRC
*** colors
#+BEGIN_SRC emacs-lisp
(setq org-todo-keyword-faces
      (quote (("TODO" :foreground "light coral" :weight bold)
              ("NEXT" :foreground "khaki" :weight bold)
              ("DONE" :foreground "light green" :weight bold)
              ("WAIT" :foreground "orange" :weight bold)
              ("HOLD" :foreground "violet" :weight bold)
              ("CANC" :foreground "deep sky blue" :weight bold))))
#+END_SRC
** tags
I use tags for agenda filtering. Very fast and simple.
Each tag here starts with a symbol to define its group. Some groups are mutually exclusive, and each group has a different color.
Any tag that is not part of these groups (eg some filetags in the few cases I use those) is easy to distinguish as it has the default tag color and is all caps.

There are several types of tags I use:
- location: a GTD contexts; these start with "@"
- tools: also a GTD contexts; these start with "#"
- attribute: useful flags for filtering; these start with "%"
- life areas: key areas of life which define priorities and goals; these start with "_"
#+BEGIN_SRC emacs-lisp
  (defun nd/filter-list-prefix (prefix str-list)
    "Return a subset of tags-list whose first character matches prefix.'
    tags-list defaults to org-tag-alist if not given"
    (seq-filter (lambda (i)
                  (and (stringp i)
                       (string-prefix-p prefix i)))
                str-list))

  (defun nd/add-tag-face (fg-name prefix)
    "Adds list of cons cells to org-tag-faces with foreground set to fg-name.
    Start and end specify the positions in org-tag-alist which define the tags
    to which the faces are applied"
    (dolist (tag (nd/filter-list-prefix prefix (mapcar #'car org-tag-alist)))
      (push `(,tag . (:foreground ,fg-name)) org-tag-faces)))

  ;; for some reason, most special chars don't really
  ;; work in org-tag-alist, only #, @, %, and _
  (setq org-tag-alist
        '((:startgroup)
          ("@errand" . ?e)
          ("@home" . ?h)
          ("@work" . ?w)
          ("@travel" . ?t)
          (:endgroup)
          
          ("#laptop" . ?L)
          ("#tcult" . ?T)
          ("#phone" . ?O)
          
          ("%note" . ?n)
          ("%inc" . ?i)
          ("%subdiv" . ?s)
          
          (:startgroup)
          ("_env" . ?E)
          ("_fin" . ?F)
          ("_int" . ?I)
          ("_met" . ?M)
          ("_phy" . ?H)
          ("_pro" . ?P)
          ("_rec" . ?R)
          ("_soc" . ?S)
          (:endgroup)))

  (setq org-tag-faces '())

  (nd/add-tag-face "PaleGreen" "@")
  (nd/add-tag-face "SkyBlue" "#")
  (nd/add-tag-face "PaleGoldenrod" "%")
  (nd/add-tag-face "violet" "_")

#+END_SRC
** properties
#+BEGIN_SRC emacs-lisp
  (add-to-list 'org-default-properties "PARENT_TYPE")
  (add-to-list 'org-default-properties "OWNER")
  (add-to-list 'org-default-properties "GOAL")
  (setq org-global-properties
        '(("PARENT_TYPE_ALL" . "periodical iterator")
          ("Effort_ALL" . "0:05 0:15 0:30 1:00 1:30 2:00 3:00 4:00 5:00 6:00")))

  ;; TODO this may not be needed
  (setq org-use-property-inheritance '("PARENT_TYPE"))
#+END_SRC
** capture
#+BEGIN_SRC emacs-lisp
(setq org-capture-templates
      '(("t" "todo" entry (file "~/Org/capture.org") "* TODO %?\ndeliverable: \n%U\n")
        ("n" "note" entry (file "~/Org/capture.org") "* %? :\\%note:\n%U\n" )
        ("a" "appointment" entry (file "~/Org/capture.org") "* %?\n%U\n%^t\n" )
        ("m" "multi-day" entry (file "~/Org/capture.org") "* TODO %?\n%U\n%^t--%^t\n" )
        ("d" "deadline" entry (file "~/Org/capture.org") "* TODO %?\nDEADLINE: %^t\ndeliverable:\n%U\n" )
        
        ("j" "journal" entry (file+datetree "~/Org/diary.org") "* %?\n%U\n")
        ("p" "org-protocol" entry (file+headline ,(concat org-directory "~/Org/capture.org") "Inbox")
         "* %^{Title}\nSource: %u, %c\n #+BEGIN_QUOTE\n%i\n#+END_QUOTE\n\n\n%?")
        ("L" "org-protocol" entry (file+headline ,(concat org-directory "~/Org/capture.org") "Inbox")
         "* %? [[%:link][%:description]] \nCaptured On: %U")            
        ("h" "habit" entry (file "~/Org/capture.org")
         "* NEXT %?\n%U\n%a\nSCHEDULED: %(format-time-string \"%<<%Y-%m-%d %a .+1d/3d>>\")\n:PROPERTIES:\n:STYLE: habit\n:REPEAT_TO_STATE: NEXT\n:END:\n")))
#+END_SRC
** refile
*** targets
#+BEGIN_SRC emacs-lisp
  (setq org-refile-targets (quote ((nil :maxlevel . 9)
                                   ("~/Org/reference/idea.org" :maxlevel . 9)
                                   (org-agenda-files :maxlevel . 9))))
#+END_SRC
*** completion
#+BEGIN_SRC emacs-lisp
  (setq org-refile-use-outline-path t)
  (setq org-outline-path-complete-in-steps nil)
  (setq org-completion-use-ido t)
#+END_SRC
*** node creation
#+BEGIN_SRC emacs-lisp
  (setq org-refile-allow-creating-parent-nodes 'confirm)
#+END_SRC
*** use current window
#+BEGIN_SRC emacs-lisp
  (setq org-indirect-buffer-display 'current-window)
#+END_SRC
*** exclude done states
#+BEGIN_SRC emacs-lisp
  (defun nd/verify-refile-target ()
    "Exclude todo keywords with a done state from refile targets"
    (not (member (nth 2 (org-heading-components)) org-done-keywords)))
  (setq org-refile-target-verify-function 'nd/verify-refile-target)
#+END_SRC
** agenda
*** basic config
#+BEGIN_SRC emacs-lisp
  (setq org-agenda-files '("~/Org"
                        "~/Org/projects"
                        "~/Org/reference"))
  ;; (setq org-agenda-files '("~/Org/reference/agendatest.org"))
  (setq org-agenda-dim-blocked-tasks nil)
  (setq org-agenda-compact-blocks t)
  (setq org-agenda-window-setup 'only-window)
#+END_SRC
*** task helper functions
These are the building blocks for skip functions.
**** timestamps
Each of these returns the timestamp if found.
#+BEGIN_SRC emacs-lisp
  (defun nd/get-date-property (date-property)
    "Helper function to get the date property and convert to a number.
  If it does not have a date, it will return nil."
    (let ((timestamp (org-entry-get nil date-property)))
      (if timestamp (float-time (date-to-time timestamp)))))

  (defun nd/heading-compare-timestamp (timestamp-fun &optional ref-time future)
    "helper function that returns the timestamp (returned by timestamp-fun on the
  current header) if timestamp is futher back in time compared to a ref-time
   (default to 0 which is now, where negative is past an positive is future). 
  If the future flag is set, returns timestamp if it is in the future
   compared to ref-time. Returns nil if no timestamp is found."
    (let* ((timestamp (funcall timestamp-fun))
          (ref-time (or ref-time 0)))
      (if (and timestamp
               (if future
                   (> (- timestamp (float-time)) ref-time)
                 (<= (- timestamp (float-time)) ref-time)))
          timestamp)))

  (defun nd/is-timestamped-heading-p ()
    (nd/get-date-property "TIMESTAMP"))

  (defun nd/is-scheduled-heading-p ()
    (nd/get-date-property "SCHEDULED"))

  (defun nd/is-deadlined-heading-p ()
    (nd/get-date-property "DEADLINE"))

  (defun nd/is-closed-heading-p ()
    (nd/get-date-property "CLOSED"))

  (defun nd/is-stale-heading-p ()
    (nd/heading-compare-timestamp 'nd/is-timestamped-heading-p))

  (defun nd/is-fresh-heading-p ()
    (nd/heading-compare-timestamp 'nd/is-timestamped-heading-p nil t))

  (defvar nd/archive-delay-days 30
    "the number of days to wait before tasks show up in the archive view")

  (defun nd/is-archivable-heading-p ()
    (nd/heading-compare-timestamp
     'nd/is-closed-heading-p
      (- (* 60 60 24 nd/archive-delay-days))))
#+END_SRC
**** task level testing
Each of these returns the keyword if true
Doubles as a way to further test the todostate in downstream functions
#+BEGIN_SRC emacs-lisp
  (defun nd/is-todoitem-p ()
    (let ((keyword (nth 2 (org-heading-components))))
      (if (member keyword org-todo-keywords-1)
          keyword)))

  (defun nd/is-project-p ()
    (and (nd/heading-has-children 'nd/is-todoitem-p) (nd/is-todoitem-p)))

  (defun nd/is-task-p ()
    (and (not (nd/heading-has-children 'nd/is-todoitem-p)) (nd/is-todoitem-p)))

  (defun nd/is-project-task-p ()
    (and (nd/heading-has-parent 'nd/is-todoitem-p) (nd/is-task-p)))

  (defun nd/is-atomic-task-p ()
    (and (not (nd/heading-has-parent 'nd/is-todoitem-p)) (nd/is-task-p)))
#+END_SRC
**** property testing
Returns t is heading matches a certian set of properties
#+BEGIN_SRC emacs-lisp
  (defun nd/is-periodical-heading-p ()
    (equal "periodical" (org-entry-get nil "PARENT_TYPE" t)))

  (defun nd/is-iterator-heading-p ()
    (equal "iterator" (org-entry-get nil "PARENT_TYPE" t)))

  (defun nd/heading-has-effort-p ()
    (org-entry-get nil "Effort"))

  (defun nd/heading-has-context-p ()
    (let ((tags (org-get-tags-at)))
      (or (> (length (nd/filter-list-prefix "#" tags)) 0)
          (> (length (nd/filter-list-prefix "@" tags)) 0))))

  (defun nd/heading-has-tag-p (tag)
    (member tag (org-get-tags-at)))
#+END_SRC
**** relational testing
Returns t if heading has certain relationship to other headings
#+BEGIN_SRC emacs-lisp
  (defun nd/heading-has-children (heading-test)
    "returns t if heading has subheadings that return t when assessed with 
  heading-test function"
    (let ((subtree-end (save-excursion (org-end-of-subtree t)))
          has-children previous-point)
      (save-excursion
        (setq previous-point (point))
        (outline-next-heading)
        (while (and (not has-children)
                    (< previous-point (point) subtree-end))
          (when (funcall heading-test)
            (setq has-children t))
          (setq previous-point (point))
          (org-forward-heading-same-level 1 t)))
      has-children))

  (defun nd/heading-has-parent (heading-test)
    "returns parent keyword if heading is in the immediate subtree of a heading 
  that evaluated to t with heading-test function"
    (save-excursion (and (org-up-heading-safe) (funcall heading-test))))

  (defun nd/has-discontinuous-parent ()
    "returns t if heading has a parent which is not a
  todoitem which in turn has a parent which is a todoitem"
    (let ((has-todoitem-parent)
          (has-non-todoitem-parent))
      (save-excursion
        (while (and (org-up-heading-safe)
                    (not has-todoitem-parent))
          (if (nd/is-todoitem-p)
              (setq has-todoitem-parent t)
            (setq has-non-todoitem-parent t))))
      (and has-todoitem-parent has-non-todoitem-parent)))
#+END_SRC
**** project level testing
#+BEGIN_SRC emacs-lisp
  (defconst nd/project-invalid-todostates
    '("WAIT" "NEXT")
    "projects cannot have these todostates") 

  (defconst nd/project-statuscodes
    '(:archivable
      :complete
      :stuck
      :held
      :waiting
      :active
      :done-incomplete
      :undone-complete
      :invalid-todostate
      :scheduled-project)
    "list of statuscodes to be used in assessing projects
  Note they are listed in order of priority (eg items further
  down the list override higher items")

  (defmacro nd/compare-statuscodes (operator statuscode-1 statuscode-2)
    "syntactic suger to compare statuscodes by position"
    `(,operator (position ,statuscode-1 nd/project-statuscodes)
       (position ,statuscode-2 nd/project-statuscodes)))
    
  (defun nd/status< (statuscode-1 statuscode-2)
    "returns t is statuscode-1 is lesser priority than statuscode-2"
    (nd/compare-statuscodes < statuscode-1 statuscode-2))

  (defun nd/status> (statuscode-1 statuscode-2)
    "returns t is statuscode-1 is greater priority than statuscode-2"
    (nd/compare-statuscodes > statuscode-1 statuscode-2))

  (defun nd/status= (statuscode-1 statuscode-2)
    "returns t is statuscode-1 is equal priority than statuscode-2"
    (nd/compare-statuscodes = statuscode-1 statuscode-2))

  (defun nd/descend-into-project ()
    "returns statuscode of project and recursively descends into subprojects"
    (let ((project-state :archivable)
          (previous-point))
      (save-excursion
        (setq previous-point (point))
        (outline-next-heading)
        ;; loop breaks if active or higher priority
        ;; note that all invalid statuscodes are higher
        ;; thus this function will only return the first
        ;; encountered error
        (while (and (nd/status< project-state :active)
                    (> (point) previous-point))
          (let ((keyword (nd/is-todoitem-p)))
            (if keyword
                (let ((cur-state
                       (if (nd/heading-has-children 'nd/is-todoitem-p)
                           (cond ((member keyword nd/project-invalid-todostates) :invalid-todostate)
                                 ((nd/is-scheduled-heading-p) :scheduled-project)
                                 ((equal keyword "CANC") (if (nd/is-archivable-heading-p)
                                                                  :archivable
                                                                :complete))
                                 ((equal keyword "HOLD") :held)
                                 (t (let ((child-statuscode (nd/descend-into-project)))
                                      (cond ((equal keyword "TODO")
                                             (if (nd/status> child-statuscode :complete)
                                                 child-statuscode
                                               :undone-complete))
                                            (t (case child-statuscode
                                                 (:complete :complete)
                                                 (:archivable (if (nd/is-archivable-heading-p)
                                                                  :archivable
                                                                :complete))
                                                 (t (if (nd/status= child-statuscode :complete)
                                                        :complete
                                                      :done-incomplete))))))))
                         (cond ((equal keyword "HOLD") :held)
                               ((equal keyword "WAIT") :waiting)
                               ((equal keyword "NEXT") :active)
                               ((and (equal keyword "TODO") (nd/is-scheduled-heading-p)) :active)
                               ((equal keyword "TODO") :stuck)
                               ((nd/is-archivable-heading-p) :archivable)
                               (t :complete)))))
                  (if (nd/status> cur-state project-state)
                      (setq project-state cur-state)))))
          (setq previous-point (point))
          (org-forward-heading-same-level 1 t)))
      project-state))

  (defmacro nd/is-project-keyword-status-p (test-keyword operator statuscode)
    "tests if a project has toplevel heading of top-keyword and
  child status equal to status code and returns keyword if
  both are true"
    `(and
      (equal ,keyword ,test-keyword)
      (nd/compare-statuscodes ,operator (nd/descend-into-project) ,statuscode)))

  (defun nd/is-project-status-p (statuscode)
    "Returns t if project matches statuscode given. 
  Note that this assumes the headline being tested is a valid project"
    (case statuscode
      ;; projects closed more than 30 days ago
      ;; note CANC overrides all subtasks/projects
      (:archivable
       (if (nd/is-archivable-heading-p)
           (or (equal keyword "CANC") 
               (nd/is-project-keyword-status-p "DONE" = :archivable))))
      
      ;; projects closed less than 30 days ago
      ;; note CANC overrides all subtasks/projects
      (:complete
       (if (not (nd/is-archivable-heading-p))
           (or (equal keyword "CANC")
               (nd/is-project-keyword-status-p "DONE" = :complete))))
      
      ;; projects with no waiting, held, or active components
      (:stuck
       (nd/is-project-keyword-status-p "TODO" = :stuck))
      
      ;; held projects
      ;; note toplevel HOLD overrides all subtasks/projects
      (:held
       (or (equal keyword "HOLD")
           (nd/is-project-keyword-status-p "TODO" = :held)))
      
      ;; projects with at least one waiting component
      (:waiting
       (nd/is-project-keyword-status-p "TODO" = :waiting))
      
      ;; projects with at least one active component
      (:active
       (nd/is-project-keyword-status-p "TODO" = :active))
      
      ;; projects marked DONE but still have undone subtasks
      (:done-incomplete
       (nd/is-project-keyword-status-p "DONE" > :complete))
      
      ;; projects marked TODO but all subtasks are done
      (:undone-complete
       (nd/is-project-keyword-status-p "TODO" < :stuck))
      
      ;; projects with invalid todo keywords
      (:invalid-todostate
       (member keyword nd/project-invalid-todostates))
      
      ;; projects with scheduled heading (only subtasks should be scheduled)
      (:scheduled-project
       (nd/is-scheduled-heading-p))

      ;; error if not known
      (t (if (not (member statuscode nd/project-statuscodes))
             (error "unknown statuscode")))))
#+END_SRC
*** skip functions
These are the primary means we use to sort through tasks. Note that we could do this with
tags in the custom commands section but I find this easier to maintain and possibly faster.
**** helper skip functions and macros
Subunits for skip functions. Not meant to be used or called from the custom commands api
#+BEGIN_SRC emacs-lisp
  (defun nd/skip-heading ()
    (save-excursion (or (outline-next-heading) (point-max))))

  (defun nd/skip-subtree ()
    (save-excursion (or (org-end-of-subtree t) (point-max))))

  (defconst nd/project-skip-todostates
    '("HOLD" "CANC")
    "These keywords override all contents within their subtrees.
  Currently used to tell skip functions when they can hop over
  entire subtrees to save time and ignore tasks")

  (defmacro nd/skip-heading-with (heading-fun test-fun)
    "Skips headings accoring to certain characteristics. heading-fun
  is a function that tests the heading and returns the todoitem keyword
  on success. Test-fun is a function that further tests the identity of
  the heading and may or may not use the keyword output supplied by
  the heading-fun. This function will not skip if heading-fun and 
  test-fun return true"
    `(save-restriction
       (widen)
       (let ((keyword (,heading-fun)))
         (message keyword)
         (if (not (and keyword ,test-fun))
             (nd/skip-heading)))))
#+END_SRC
**** headings
Skip functions for headings which may or may
not be todo-items

Note in the case of stale headings that 
I only care about those that are not part
of projects (projects will get taken care
of when the entire project is finished)
and those that are not DONE/CANC (as
those appear in the regular archive
section)
#+BEGIN_SRC emacs-lisp
  (defun nd/skip-headings-with-tags (pos-tags-list &optional neg-tags-list)
    "Skips headings that have tags in pos-tags-list and also skips
  tags that do not have tags in neg-tags-list"
    (save-restriction
      (widen)
      (let ((header-tags (org-get-tags-at)))
        (if (and (or (not pos-tags-list)
                     (intersection pos-tags-list header-tags :test 'equal))
                 (not (intersection neg-tags-list header-tags :test 'equal)))
            (nd/skip-heading)))))

  (defun nd/skip-non-stale-headings ()
    (save-restriction
      (widen)
      (let ((keyword (nd/is-todoitem-p)))
        (if (not
             (and (nd/is-stale-heading-p)
                  (not (member keyword org-done-keywords))
                  (not (nd/heading-has-children 'nd/is-todoitem-p))
                  (not (nd/heading-has-parent 'nd/is-todoitem-p))))
            (nd/skip-heading)))))
    
#+END_SRC
**** atomic tasks
By definition these have no parents, so
I don't need to worry about skipping over projects
any todo state is valid and we only sort by done/canc
#+BEGIN_SRC emacs-lisp
  ;; NOTE: this assumes that tags-todo will
  ;; filter out all done state tasks
  (defun nd/skip-non-atomic-tasks ()
    (save-excursion
      (widen)
      (if (not (nd/is-atomic-task-p))
          (nd/skip-heading))))

  (defun nd/skip-non-closed-atomic-tasks ()
    (nd/skip-heading-with
     nd/is-atomic-task-p
     (and (member keyword org-done-keywords)
          (not (nd/is-archivable-heading-p)))))

  (defun nd/skip-non-archivable-atomic-tasks ()
    (nd/skip-heading-with
     nd/is-atomic-task-p
     (and (member keyword org-done-keywords)
          (nd/is-archivable-heading-p))))
#+END_SRC
**** periodicals
These are headers marked with PARENT_TYPE=periodical
property that have timestamped headers as children
which in turn may or may not have todo keywords.
They are to be refilled when all children are stale
Note that I only care about the parent headers
as the children should always show up in the agenda
simply because they have timestamps. Parents can be
either fresh (at least one child in the future) or
stale (all children in the past).
#+BEGIN_SRC emacs-lisp
  (defun nd/skip-non-fresh-periodical-parent-headers ()
    (save-restriction
      (widen)
      (if (not (and (nd/is-periodical-heading-p)
                    (not (nd/heading-has-parent 'nd/is-periodical-heading-p))
                    (nd/heading-has-children 'nd/is-fresh-heading-p)))
          (nd/skip-heading))))

  (defun nd/skip-non-stale-periodical-parent-headers ()
    (save-restriction
      (widen)
      (if (not (and (nd/is-periodical-heading-p)
                    (not (nd/heading-has-parent 'nd/is-periodical-heading-p))
                    (nd/heading-has-children 'nd/is-stale-heading-p)
                    (not (nd/heading-has-children 'nd/is-fresh-heading-p))))
          (nd/skip-heading))))

  (defun nd/skip-non-empty-periodical-parent-headers ()
    (save-restriction
      (widen)
      (if (not (and (nd/is-periodical-heading-p)
                    (not (nd/heading-has-parent 'nd/is-periodical-heading-p))
                    (not (nd/heading-has-children 'nd/is-timestamped-heading-p))))
          (nd/skip-heading))))
#+END_SRC
**** project tasks
Since these are part of projects I need to assess
if the parent project is skippable, in which case
I jump to the next subtree
Note that I only care about the keyword in these
cases because I don't archive these, I archive
their parent projects. The keywords I care about
are NEXT, WAIT, and HOLD because these are
definitive project tasks that require/inhibit
futher action. (TODO = stuck which I take care
of at the project level, and DONE/CANC = archivable
which is dealt with similarly)
#+BEGIN_SRC emacs-lisp
  (defun nd/skip-non-project-tasks ()
    (save-restriction
      (widen)
      (let ((keyword (nd/is-todoitem-p)))
        (if keyword
            (if (nd/heading-has-children 'nd/is-todoitem-p)
                (if (member keyword nd/project-skip-todostates)
                    (nd/skip-subtree)
                  (nd/skip-heading))
              (if (not (and (nd/heading-has-parent 'nd/is-todoitem-p)
                            (not (nd/is-timestamped-heading-p))
                            (not (nd/is-scheduled-heading-p))
                            (not (nd/is-deadlined-heading-p))
                            ;; (equal keyword skip-keyword)
                            ))
                  (nd/skip-heading)))
          (nd/skip-heading)))))

#+END_SRC
**** header-level errors
Some headers are invalid under certain conditions
which I test here
#+BEGIN_SRC emacs-lisp
  (defun nd/skip-non-discontinuous-project-tasks ()
    (nd/skip-heading-with
     nd/is-todoitem-p
     (nd/has-discontinuous-parent)))

  (defun nd/skip-non-done-unclosed-todoitems ()
    (nd/skip-heading-with
     nd/is-todoitem-p
     (and (member keyword org-done-keywords)
          (not (nd/is-closed-heading-p)))))

  (defun nd/skip-non-undone-closed-todoitems ()
    (nd/skip-heading-with
     nd/is-todoitem-p
     (and (not (member keyword org-done-keywords))
          (nd/is-closed-heading-p))))

  (defun nd/skip-non-iterator-atomic-tasks ()
    (nd/skip-heading-with
     nd/is-atomic-task-p
     (nd/is-iterator-heading-p)))

  (defun nd/skip-atomic-tasks-with-context ()
    (nd/skip-heading-with
     nd/is-atomic-task-p
     (not (nd/heading-has-context-p))))

  (defun nd/skip-project-tasks-with-context ()
    (nd/skip-heading-with
     nd/is-project-task-p
     (not (nd/heading-has-context-p))))

  (defun nd/skip-projects-with-context ()
    (nd/skip-heading-with
     nd/is-project-p
     (not (nd/heading-has-context-p))))

  (defun nd/skip-tasks-with-effort ()
    (nd/skip-heading-with
     nd/is-task-p
     (not (nd/heading-has-effort-p))))
#+END_SRC
**** projects
Projects are handled quite simply. They have statuscodes
for which I test, and this can all be handled by one function.
Note that this is used for "normal" projects as well as iterators
#+BEGIN_SRC emacs-lisp
  (defun nd/skip-projects-without-statuscode (statuscode)
    (save-restriction
      (widen)
      (let ((keyword (nd/is-project-p)))
        (if keyword
            (if (and nd/agenda-limit-project-toplevel
                     (nd/heading-has-parent 'nd/is-todoitem-p))
                (nd/skip-subtree)
              (if (not (nd/is-project-status-p statuscode))
                  (nd/skip-heading)))
          (nd/skip-heading)))))
#+END_SRC
*** interactive view functions
#+BEGIN_SRC emacs-lisp
  (defvar nd/agenda-limit-project-toplevel t
    "used to filter projects by all levels or top-level only")

  (defvar nd/agenda-hide-incubator-tags t
    "used to filter incubator headings")

  (defun nd/toggle-project-toplevel-display ()
    (interactive)
    (setq nd/agenda-limit-project-toplevel (not nd/agenda-limit-project-toplevel))
    (when (equal major-mode 'org-agenda-mode)
      (org-agenda-redo))
    (message "Showing %s project view in agenda"
             (if nd/agenda-limit-project-toplevel "toplevel" "complete")))

  (defun nd/toggle-agenda-var (var msg)
    (interactive)
    (set var (not (eval var)))
    (when (equal major-mode 'org-agenda-mode)
      (org-agenda-redo))
    (message msg))

  (defun nd/org-agenda-filter-non-context ()
  "A quick and dirty agenda filter that removes all
  tasks with context tags"
    (interactive)
    (let* ((tags-list (mapcar #'car org-tag-alist))
           (context-tags (append
                          (nd/filter-list-prefix "@" tags-list)
                          (nd/filter-list-prefix "#" tags-list))))
      (setq org-agenda-tag-filter
            (mapcar (lambda(tag) (concat "-" tag)) context-tags))
      (org-agenda-filter-apply org-agenda-tag-filter 'tag)))
#+END_SRC
*** custom commands
#+BEGIN_SRC emacs-lisp
  (setq org-agenda-tags-todo-honor-ignore-options t)

  (setq org-agenda-prefix-format
        '((agenda . "  %-12:c%-7:e%?-12t% s")
          (timeline . "  % s")
          (todo . "  %-12:c")
          (tags . "  %-12:c%-7:e")
          (search . "  %-12:c")))

  (defconst nd/org-agenda-todo-sort-order '("NEXT" "WAIT" "HOLD" "TODO"))

  (setq org-agenda-cmp-user-defined
        '(lambda (a b)
           (let ((pa (- (length (member
                                 (get-text-property 1 'todo-state a)
                                 nd/org-agenda-todo-sort-order))))
                 (pb (- (length (member
                                 (get-text-property 1 'todo-state b)
                                 nd/org-agenda-todo-sort-order)))))
             (cond ((or (null pa) (null pb)) nil)
                   ((> pa pb) +1)
                   ((< pa pb) -1)))))

  (defun nd/agenda-base-header-command (match header skip-fun)
    `(tags
      ,match
      ((org-agenda-overriding-header ,header)
       (org-agenda-skip-function ,skip-fun)
       (org-agenda-sorting-strategy '(category-keep)))))

  (defun nd/agenda-base-task-command (match header skip-fun &optional sort)
    (or sort (setq sort ''(category-keep)))
    `(tags-todo
      ,match
      ((org-agenda-overriding-header ,header)
       (org-agenda-skip-function ,skip-fun)
       (org-agenda-todo-ignore-with-date t)
       (org-agenda-sorting-strategy ,sort))))

  (defun nd/agenda-base-project-command (match header statuscode)
    `(tags
      ,match
      ((org-agenda-overriding-header
        (concat (and nd/agenda-limit-project-toplevel "Toplevel ") ,header))
       (org-agenda-skip-function '(nd/skip-projects-without-statuscode ,statuscode))
       (org-agenda-sorting-strategy '(category-keep)))))

  (let ((task-match "-NA-REFILE-%inc-PARENT_TYPE=\"periodical\"/")
        (project-match "-NA-REFILE-%inc-PARENT_TYPE=\"periodical\"-PARENT_TYPE=\"iterator\"/")
        (periodical-match "-NA-REFILE+PARENT_TYPE=\"periodical\"-PARENT_TYPE=\"iterator\"/")
        (iterator-match "-NA-REFILE-PARENT_TYPE=\"periodical\"+PARENT_TYPE=\"iterator\"/"))
    (setq org-agenda-custom-commands
          `(("t"
             "Task View"
             ((agenda "" (org-agenda-skip-function '(nd/skip-headings-with-tags '("%inc"))))
              ,(nd/agenda-base-task-command project-match
                                            "Project Tasks"
                                            ''nd/skip-non-project-tasks
                                            ''(user-defined-up category-keep))
              ,(nd/agenda-base-task-command project-match
                                            "Atomic Tasks"
                                            ''nd/skip-non-atomic-tasks)))
            ("p"
             "Project View"
             (,(nd/agenda-base-project-command project-match "Stuck Projects" :stuck)
              ,(nd/agenda-base-project-command project-match "Waiting Projects" :waiting)
              ,(nd/agenda-base-project-command project-match "Active Projects" :active)
              ,(nd/agenda-base-project-command project-match "Held Projects" :held)))
            ("P"
             "Periodical View"
             (,(nd/agenda-base-header-command periodical-match "Empty Periodicals" ''nd/skip-non-empty-periodical-parent-headers)
              ,(nd/agenda-base-header-command periodical-match "Stale Periodicals" ''nd/skip-non-stale-periodical-parent-headers)
              ,(nd/agenda-base-header-command periodical-match "Fresh Periodicals" ''nd/skip-non-fresh-periodical-parent-headers)))
            ("i"
             "Iterator View"
             (,(nd/agenda-base-project-command iterator-match "Stuck Iterators (require NEXT or schedule)" :stuck)
              ,(nd/agenda-base-project-command iterator-match "Empty Iterators (require new tasks)" :undone-complete)
              ,(nd/agenda-base-task-command iterator-match "Uninitialized Iterators (no tasks added)" ''nd/skip-non-iterator-atomic-tasks)
              ,(nd/agenda-base-project-command iterator-match "Active Iterators" :active)
              ,(nd/agenda-base-project-command iterator-match "Waiting Iterators" :waiting)
              ,(nd/agenda-base-project-command iterator-match "Held Iterators" :held)))
            ("I"
             "Incubator View"
             ((agenda "" ((org-agenda-span 7)
                          (org-agenda-time-grid nil)
                          (org-agenda-entry-types '(:deadline :timestamp))))
              ,(nd/agenda-base-task-command "-NA-REFILE+%inc/" "Incubated Tasks" ''nd/skip-non-atomic-tasks)
              ,(nd/agenda-base-project-command "-NA-REFILE+%inc/" "Incubated Projects" :held)))
            ("r"
             "Refile and Critical Errors"
             ((tags "REFILE"
                    ((org-agenda-overriding-header "Tasks to Refile"))
                    (org-tags-match-list-sublevels nil))
              ,(nd/agenda-base-task-command task-match "Discontinous Project" ''nd/skip-non-discontinuous-project-tasks)
              ,(nd/agenda-base-project-command project-match "Invalid Todostate" :invalid-todostate)))
            ("e"
             "Non-critical Errors"
             (,(nd/agenda-base-header-command task-match "Undone Closed" ''nd/skip-non-undone-closed-todoitems)
              ,(nd/agenda-base-header-command task-match "Done Unclosed" ''nd/skip-non-done-unclosed-todoitems)
              ,(nd/agenda-base-project-command project-match "Undone Completed" :undone-complete)
              ,(nd/agenda-base-project-command project-match "Done Incompleted" :done-incomplete)))
            ("A"
             "Archivable Tasks and Projects"
             (,(nd/agenda-base-header-command task-match "Archivable Atomic Tasks" ''nd/skip-non-archivable-atomic-tasks)
              ,(nd/agenda-base-header-command task-match "Stale Tasks" ''nd/skip-non-stale-headings)
              ,(nd/agenda-base-project-command iterator-match "Archivable Iterators" :archivable)
              ,(nd/agenda-base-project-command project-match "Archivable Projects" :archivable))))))

#+END_SRC
*** views
**** calendar display
#+BEGIN_SRC emacs-lisp
  (setq org-agenda-start-on-weekday 0)
  (setq org-agenda-span 'day)
  (setq org-agenda-time-grid (quote ((daily today remove-match)
                                     #("----------------" 0 16 (org-heading t))
                                     (0900 1100 1300 1500 1700))))
#+End_src
**** right align tags
the agenda does not do this by default...it's annoying
#+BEGIN_SRC emacs-lisp
  (add-hook 'org-finalize-agenda-hook 'place-agenda-tags)
  (defun place-agenda-tags ()
    "Put the agenda tags by the right border of the agenda window."
    (setq org-agenda-tags-column (- 4 (window-width)))
    (org-agenda-align-tags))
#+END_SRC 
*** auto exclusion
#+BEGIN_SRC emacs-lisp
  (defun nd/org-auto-exclude-function (tag)
    "Automatic task exclusion in the agenda with / RET"
    (and (cond
          ((string= tag "hold")
           t))
         (concat "-" tag)))

  (setq org-agenda-auto-exclude-function 'nd/org-auto-exclude-function)
#+END_SRC
** column view
#+BEGIN_SRC emacs-lisp
  (setq org-columns-default-format
        "%25ITEM %4TODO %TAGS %5Effort{:} %OWNER(OWN)")

  (set-face-attribute 'org-column nil :background "#1e2023")
  ;; org-columns-summary-types
#+END_SRC
** interactive functions
#+BEGIN_SRC emacs-lisp
  (defun nd/mark-subtree-keyword (new-keyword &optional exclude)
    "marks all tasks in a subtree with keyword unless original keyword
  is in the optional argument exclude"
    (let ((subtree-end (save-excursion (org-end-of-subtree t))))
      (if (not (listp exclude))
          (error "exlude must be a list if provided"))
      (save-excursion
        (while (< (point) subtree-end)
          (let ((keyword (nd/is-todoitem-p)))
            (if (and keyword (not (member keyword exclude)))
                (org-todo new-keyword)))
          (outline-next-heading)))))

  (defun nd/mark-subtree-done ()
    "marks all tasks in subtree as DONE unless they are already canc"
    (interactive)
    (nd/mark-subtree-keyword "DONE" '("CANC")))

  (defun nd/org-clone-subtree-with-time-shift-reset (n &optional shift)
    "Like `org-clone-subtree-with-time-shift' except it resets checkboxes
  and reverts all todo keywords to TODO"
    (interactive "nNumber of clones to produce: ")
    (let ((shift (read-from-minibuffer
                  "Date shift per clone (e.g. +1w, empty to copy unchanged): ")))
      (condition-case err
          (progn
            (org-clone-subtree-with-time-shift n shift)
            (save-excursion
              (dotimes (i n)
               (org-forward-heading-same-level 1 t)
               (org-reset-checkbox-state-subtree)
               (nd/mark-subtree-keyword "TODO")
               (org-cycle))))
        (error (message "%s" (error-message-string err))))))
#+END_SRC
** caldav
+BEGIN_SRC emacs-lisp
  (use-package org-caldav
    :ensure t
    :config (org-caldav-url "https://portnoy4prez.yavin4.ch/nextcloud/remote.php/dav/calendars/petrucci4prez/concerts/"
                            org-cladav-calendar-id "testorg"
                            org-caldav-inbox "~/Org/reference/testcal.org"))
#+END_SRC
** calfw
#+BEGIN_SRC emacs-lisp
  (use-package calfw-org
    :init
    :ensure t
    :config (setq cfw:fchar-junction ?╋
                  cfw:fchar-vertical-line ?┃
                  cfw:fchar-horizontal-line ?━
                  cfw:fchar-left-junction ?┣
                  cfw:fchar-right-junction ?┫
                  cfw:fchar-top-junction ?┯
                  cfw:fchar-top-left-corner ?┏
                  cfw:fchar-top-right-corner ?┓))
#+END_SRC
* shell
#+begin_src emacs-lisp
(defvar nd-term-shell "/bin/bash")
(defadvice ansi-term (before force-bash)
  (interactive (list nd-term-shell)))
(ad-activate 'ansi-term)
#+END_SRC
* ediff
#+BEGIN_SRC emacs-lisp
(setq ediff-window-setup-function 'ediff-setup-windows-plain)
#+END_SRC