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+ id 1aFqnc-0006lY-SA; Sun, 03 Jan 2016 23:06:52 +0100\r
+From: Michal Sojka <sojkam1@fel.cvut.cz>\r
+To: Tomi Ollila <tomi.ollila@iki.fi>, notmuch@notmuchmail.org\r
+Subject: Re: [PATCH v4] devel/emacs: add devel/try-emacs-mua\r
+In-Reply-To: <1450610032-23776-1-git-send-email-tomi.ollila@iki.fi>\r
+References: <1450610032-23776-1-git-send-email-tomi.ollila@iki.fi>\r
+User-Agent: Notmuch/0.21+30~g55c056a (http://notmuchmail.org) Emacs/24.5.1\r
+ (x86_64-pc-linux-gnu)\r
+Date: Sun, 03 Jan 2016 23:06:52 +0100\r
+Message-ID: <87vb7aco77.fsf@steelpick.2x.cz>\r
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+\r
+Hi Tomi,\r
+\r
+On Sun, Dec 20 2015, Tomi Ollila wrote:\r
+> devel/try-emacs-mua provides an easy way to try and experiment\r
+> with the notmuch emacs client distributed in emacs subdirectory of\r
+> the notmuch source tree.\r
+>\r
+> try-emacs-mua starts a new emacs process and if initial checks pass\r
+> *scratch* buffer is filled with information of how to begin.\r
+>\r
+> User can add normal emacs flags, like -q, -Q and e.g. -f notmuch. Any\r
+> given plain filename arguments are filtered out (with message).\r
+\r
+Why are plain files filtered? Yesterday, when I experimented with\r
+jl-encrypt.el, I started emacs like:\r
+\r
+ emacs -Q --directory ... --load notmuch.el /tmp/jl-encrypt.el\r
+\r
+This allowed me to experiment with it (edebug), modify it and restart\r
+emacs sessions easily without the need to type C-x C-f and the file name\r
+in every session.\r
+\r
+> If the emacs version in use is smaller than 24.4, special care is taken\r
+> to ensure that notmuch*.elc files older than corresponding .el files\r
+> are not loaded. Since emacs 24.4, setting `load-prefer-newer' variable\r
+> takes care of this.\r
+> ---\r
+>\r
+> Now all-elisp, vs v3: id:1447457397-11688-1-git-send-email-tomi.ollila@iki.fi\r
+>\r
+> In id:87si4bwrsu.fsf@qmul.ac.uk Mark had some thoughts if something from this\r
+> could perhaps be used as some idea how to improve test testing. We'll have\r
+> to think more of that later. Rest of the review is pretty much irrelevant\r
+> for this (But I fixed that particular bug before turning to this ;).\r
+>\r
+> devel/try-emacs-mua | 153 ++++++++++++++++++++++++++++++++++++++++++++++++++++\r
+> 1 file changed, 153 insertions(+)\r
+> create mode 100755 devel/try-emacs-mua\r
+>\r
+> diff --git a/devel/try-emacs-mua b/devel/try-emacs-mua\r
+> new file mode 100755\r
+> index 000000000000..1f916d2806f9\r
+> --- /dev/null\r
+> +++ b/devel/try-emacs-mua\r
+> @@ -0,0 +1,153 @@\r
+> +#!/bin/sh\r
+> +:; set -x; exec "${EMACS:-emacs}" --debug-init --load "$0" "$@"; exit\r
+\r
+Huh! Nice trick, especially the ":;" :)\r
+\r
+> +;;\r
+> +;; Try the notmuch emacs client located in ../notmuch/emacs directory\r
+> +;;\r
+> +;; Run this without arguments; emacs window opens with some usage information\r
+> +;;\r
+> +;; Authors: Tomi Ollila <tomi.ollila@iki.fi>\r
+> +;;\r
+> +;; http://www.emacswiki.org/emacs/EmacsScripts was a useful starting point...\r
+> +;;\r
+> +;; Licence: GPLv3+\r
+> +;;\r
+> +\r
+> +(message "Starting '%s'" load-file-name)\r
+> +\r
+> +(set-buffer "*scratch*")\r
+> +\r
+> +(setq initial-buffer-choice t) ;; *scratch* buffer\r
+> +\r
+> +(when (featurep 'notmuch)\r
+> + (insert "\r
+> +Notmuch has been loaded to this emacs (during processing of the init file)\r
+> +which means it is (most probably) loaded from different source than expected.\r
+> +\r
+> +Please run \"" (file-name-nondirectory load-file-name)\r
+> +"\" with '-q' (or '-Q') as an argument, to disable\r
+> +processing of the init file -- you can load it after emacs has started\n\r
+> +exit emacs (y or n)? ")\r
+> + (if (y-or-n-p "exit emacs")\r
+> + (kill-emacs)\r
+> + (error "Stopped reading %s" load-file-name)))\r
+> +\r
+> +(let ((pdir (file-name-directory\r
+> + (directory-file-name (file-name-directory load-file-name)))))\r
+> + (unless (file-exists-p (concat pdir "emacs/notmuch-lib.el"))\r
+> + (insert "Cannot find notmuch-emacs source directory\r
+> +while looking at: " pdir "emacs\n\nexit emacs (y or n)? ")\r
+> + (if (y-or-n-p "exit emacs")\r
+> + (kill-emacs)\r
+> + (error "Stopped reading %s" load-file-name)))\r
+> + (setq try-notmuch-source-directory (directory-file-name pdir))\r
+> + (setq try-notmuch-emacs-directory (concat pdir "emacs/"))\r
+> + (setq load-path (cons try-notmuch-emacs-directory load-path)))\r
+> +\r
+> +;; for logging, debugging and load tracing (broke on emacs 24.5.1 :O)\r
+> +;;(defadvice file-truename (before before-file-truename activate)\r
+> +;;;; (message "file-truename: '%s' '%s' '%s'" filename counter prev-dirs))\r
+> +;; (unless counter\r
+> +;; (message "file-truename: %s" filename)))\r
+\r
+What is the benefit of advising file-truename? Especially when you do\r
+other type of logging below. I'd prefer to have this as a comment in the\r
+file. Or is this some leftover from your experiments?\r
+\r
+> +\r
+> +;; they say advice doesn't work for primitives (functions from c source)\r
+> +;; well, these 'before' advice works for emacs 23.1 - 24.5 (at least)\r
+> +;; ...and for our purposes 24.3 is enough (there is no load-prefer-newer there)\r
+> +;; note also that the old, "obsolete" defadvice mechanism was used, but that\r
+> +;; is the only one available for emacs 23 and 24 up to 24.3.\r
+> +\r
+> +(if (boundp 'load-prefer-newer)\r
+> + (defadvice require (before before-require activate)\r
+> + (unless (featurep feature)\r
+> + (message "require: %s" feature)))\r
+> + ;; else: special require "short-circuit"; after load feature is provided...\r
+> + ;; ... in notmuch sources we always use require and there are no loops\r
+> + (defadvice require (before before-require activate)\r
+> + (unless (featurep feature)\r
+> + (message "require: %s" feature)\r
+> + (let ((name (symbol-name feature)))\r
+> + (if (and (string-match "^notmuch" name)\r
+> + (file-newer-than-file-p\r
+> + (concat try-notmuch-emacs-directory name ".el")\r
+> + (concat try-notmuch-emacs-directory name ".elc")))\r
+> + (load (concat try-notmuch-emacs-directory name ".el") nil nil t t)\r
+> + )))))\r
+> +\r
+> +(insert "Found notmuch emacs client in " try-notmuch-emacs-directory "\n")\r
+> +\r
+> +(condition-case err\r
+> +;; "opportunistic" load-prefer-newer -- will be effective since emacs 24.4\r
+> + (let ((load-prefer-newer t)\r
+> + (force-load-messages t))\r
+> + (require 'notmuch))\r
+> + ;; specifying `debug' here lets the debugger run\r
+> + ;; if `debug-on-error' is non-nil.\r
+> + ((debug error)\r
+> + (progn\r
+> + (insert "\nLoading notmuch failed: " (error-message-string err) "\n")\r
+> + (insert "See *Messages* buffer for more information.\n")\r
+> + (error "Stopped reading %s" load-file-name))))\r
+> +\r
+> +(insert "\r
+> +Go to the end of the following lines and type C-x C-e to evaluate\r
+> +(or C-j which is shorter but inserts evaluation results into buffer)\r
+> +\r
+> +To \"disable\" mail sending, evaluate\r
+> +* (setq message-send-mail-function (lambda () t))\r
+> +")\r
+> +\r
+> +(if (file-exists-p (concat try-notmuch-source-directory "/notmuch"))\r
+> + (insert "\r
+> +To use accompanied notmuch binary from the same source, evaluate\r
+> +* (setq exec-path (cons \"" try-notmuch-source-directory "\" exec-path))\r
+> +Note: Evaluating the above may be followed by unintended database\r
+> +upgrade and getting back to old version may require dump & restore.\r
+> +"))\r
+\r
+You can also inform the user which notmuch binary will be used without\r
+the above setq.\r
+\r
+> +\r
+> +(if init-file-user ;; nil, if '-q' or '-Q' is given, but no '-u' 'USER'\r
+> + (insert "\r
+> +Your init file was processed during emacs startup. If you want to test\r
+> +notmuch emacs mail client without your emacs init file interfering, Run\n\""\r
+> +(file-name-nondirectory load-file-name) "\" with '-q' (or '-Q') as an argument.\r
+> +")\r
+> + (let ((init-file-name))\r
+> + ;; determining init file name in startup.el/command-line is too complicated\r
+> + ;; to be duplicated here; these 3 file names covers most of the users\r
+> + (mapc (lambda (fn) (if (file-exists-p fn) (setq init-file-name fn)))\r
+> + '("~/.emacs.d/init.el" "~/.emacs" "~/.emacs.el"))\r
+> + (if init-file-name\r
+> + (insert "\r
+> +If you want to load your emacs init file now, evaluate\r
+> +* (load \"" init-file-name "\")\r
+> +")))\r
+> + (insert "\r
+> +If you want to use packages (e.g. company from elpa) evaluate\r
+> +* (progn (require 'package) (package-initialize))\r
+> +"))\r
+> +\r
+> +(insert "\r
+> +To start notmuch (hello) screen, evaluate\r
+> +* (notmuch-hello)")\r
+> +\r
+> +(setq try-emacs-pop-messages-buffers nil)\r
+\r
+If this variable was named something like arg-ignored, the code bellow\r
+would be easier to understand.\r
+\r
+> +(add-hook 'command-line-functions\r
+> + (lambda ()\r
+> + (unless try-emacs-pop-messages-buffers (message "%s" ""))\r
+> + (message "*** Ignoring arg '%s'" argi)\r
+> + (setq try-emacs-pop-messages-buffers t)))\r
+> +\r
+> +(add-hook 'emacs-startup-hook\r
+> + (lambda ()\r
+> + (when try-emacs-pop-messages-buffers\r
+> + (message "%s" "")\r
+> + (message "Press 'q' to hide this window")\r
+\r
+Pressing 'q' doesn't work under Emacs 23.\r
+\r
+> + (pop-to-buffer "*Messages*"))\r
+> + (set-buffer "*scratch*")\r
+> + (lisp-interaction-mode)\r
+> + (goto-char (point-min))\r
+> + (forward-line)\r
+> + (set-buffer-modified-p nil)))\r
+> +\r
+> +;; Local Variables:\r
+> +;; mode: emacs-lisp\r
+> +;; End:\r
+\r
+-Michal\r
projects / notmuch-archives.git / commitdiff