My Emacs configuration.
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.emacs.d/gnus

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;;; gnus --- Daniel's Gnus Configuration
;;; Commentary:
;; Sources:
;; - http://page.math.tu-berlin.de/~freundt/.gnus
;; - Formatting from http://www.emacswiki.org/emacs/GnusFormatting, Version 3
;; - http://www.emacswiki.org/emacs/GnusDemon
;; - http://people.irisa.fr/Nicolas.Berthier/file:.gnus.el
;;; Code:
;;; General
;; Requires
(require 'gnus)
(require 'message)
(require 'gnus-util)
(require 'gnus-start)
(require 'gnus-group)
(require 'gnus-sum)
(require 'gnus-art)
(require 'gnus-score)
(require 'nntp)
(require 'gnus-agent)
(require 'nnml)
(require 'gnus-async)
;; Debugging
(setq gnus-verbose 10)
;; Accounts
(setq-default message-dont-reply-to-names
(regexp-opt (list db/personal-mail-address db/work-mail-address)
'words))
(setq gnus-select-method '(nnnil "")
gnus-secondary-select-methods
`((nntp "dfn"
(nntp-open-connection-function nntp-open-tls-stream)
(nntp-port-number 563)
(nntp-address "news.cis.dfn.de"))
(nntp "gmane"
(nntp-open-connection-function nntp-open-tls-stream)
(nntp-port-number 563)
(nntp-address "news.gmane.org"))
(nnimap "tu"
(nnimap-stream shell)
(nnimap-shell-program "/usr/lib/dovecot/imap -o mail_location=maildir:$HOME/Mail/zih")
(nnimap-inbox "INBOX")
(nnimap-split-methods nnimap-split-fancy)
(nnimap-split-fancy ,db/work-gnus-filter-rules))
(nnimap "algebra20"
(nnimap-stream shell)
(nnimap-shell-program "/usr/lib/dovecot/imap -o mail_location=maildir:$HOME/Mail/algebra20")
(nnimap-split-methods nnimap-split-fancy)
(nnimap-inbox "INBOX")
(nnimap-split-fancy ,db/personal-gnus-filter-rules))
(nnml ""
(nnmail-split-methods nnmail-split-fancy)
(nnmail-split-fancy
(| ("subject" ".*Tiger Auditing Report for.*" "mail.tiger")
"mail.misc")))
(nnmaildir "archive"
(directory "~/Mail/archive/")
(directory-files nnheader-directory-files-safe)
(nnir-search-engine notmuch)
(nnir-notmuch-remove-prefix ,(expand-file-name "~/Mail/archive/")))))
;; General Configuration
(setq gnus-ignored-from-addresses message-dont-reply-to-names
message-directory (expand-file-name "mail/" gnus-directory)
nnmail-message-id-cache-file (expand-file-name ".nnmail-cache" gnus-directory)
nnml-directory message-directory
mail-sources '((file))
mail-source-delete-incoming t
nntp-nov-is-evil t
gnus-asynchronous t
gnus-save-killed-list nil
gnus-save-newsrc-file nil
gnus-read-newsrc-file nil
gnus-check-new-newsgroups nil
gnus-use-cache 'passive
gnus-read-active-file 'some
gnus-build-sparse-threads 'some
gnus-subscribe-newsgroup-method 'gnus-subscribe-killed
gnus-group-list-inactive-groups nil
gnus-suppress-duplicates nil
gnus-large-newsgroup 200
nnmail-expiry-wait 7
nnmail-cache-accepted-message-ids t
gnus-summary-next-group-on-exit nil
gnus-use-full-window nil
gnus-always-force-window-configuration t
gnus-fetch-old-headers nil)
(setq gnus-visible-headers (regexp-opt '("From:"
"Newsgroups:"
"Subject:"
"Date:"
"Followup-To:"
"Reply-To:"
"Organization:"
"Summary:"
"Keywords:"
"Mail-Copies-To:"
"To:"
"Cc:"
"BCC:"
"X-Newsreader:"
"X-Mailer:"
"X-Sent:"
"Posted-To:"
"Mail-Copies-To:"
"Apparently-To:"
"Gnus-Warning:"
"Resent-From:"
"gpg-key-ID:"
"fingerprint:"
"X-Jabber-ID:"
"User-Agent:")))
(defadvice gnus-group-mail (before inhibit-no-argument activate)
(unless (ad-get-arg 0)
(ad-set-arg 0 1)))
(remove-hook 'gnus-mark-article-hook
'gnus-summary-mark-read-and-unread-as-read)
(add-hook 'gnus-mark-article-hook 'gnus-summary-mark-unread-as-read)
(add-hook 'kill-emacs-hook
#'(lambda ()
(interactive)
(when (get-buffer "*Group*")
(gnus-group-exit))))
(bind-key "q" #'gnus-summary-expand-window gnus-article-mode-map)
;;; Appearence
(setq gnus-group-line-format "%S%p%P%5y(%2i):%B%(%-70g%)
"
gnus-auto-select-first nil
gnus-auto-select-next nil)
(setq gnus-summary-line-format "%U%O%R%6k %(%&user-date; %-13,13f %B%s%)\n"
gnus-thread-sort-functions '(gnus-thread-sort-by-most-recent-date)
gnus-subthread-sort-functions '(gnus-thread-sort-by-date)
gnus-thread-hide-subtree t
gnus-user-date-format-alist '((t . "%Y-%m-%d %H:%M"))
gnus-sum-thread-tree-indent " "
gnus-sum-thread-tree-root "● "
gnus-sum-thread-tree-false-root "◎ "
gnus-sum-thread-tree-single-indent "◯ "
gnus-sum-thread-tree-single-leaf "╰► "
gnus-sum-thread-tree-leaf-with-other "├► "
gnus-sum-thread-tree-vertical "│"
gnus-summary-thread-gathering-function 'gnus-gather-threads-by-references
;; Yay (seen here: `https://github.com/cofi/dotfiles/blob/master/gnus.el')
gnus-ancient-mark ?✓
;; gnus-cached-mark ?☍
gnus-canceled-mark ?↗
gnus-del-mark ?✗
;; gnus-dormant-mark ?⚐
gnus-expirable-mark ?♻
gnus-forwarded-mark ?↪
;; gnus-killed-mark ?☠
;; gnus-process-mark ?⚙
gnus-read-mark ?✓
gnus-recent-mark ?✩
gnus-replied-mark ?↺
gnus-unread-mark ?✉
;; gnus-unseen-mark ?★
;; gnus-ticked-mark ?⚑
)
;; we need to do some magic as otherwise the agent does not delete articles from
;; its .overview when we move them around
(defadvice gnus-summary-move-article (around
no-cancel-mark
(&optional n to-newsgroup
select-method action)
activate)
(let ((articles (gnus-summary-work-articles n))
(return ad-do-it))
(when (or (null action)
(eq action 'move))
(dolist (article articles)
(gnus-summary-mark-article article gnus-expirable-mark)))
return))
(add-hook 'gnus-group-mode-hook 'gnus-topic-mode)
(setq gnus-treat-hide-boring-headers 'head
gnus-treat-strip-multiple-blank-lines nil
gnus-treat-display-smileys t
gnus-treat-emphasize 'head
gnus-treat-unsplit-urls t)
;;; Adaptive Scoring
(setq gnus-use-scoring nil
gnus-use-adaptive-scoring nil
gnus-adaptive-word-length-limit 5
gnus-adaptive-word-no-group-words t
gnus-default-adaptive-score-alist
'((gnus-unread-mark)
(gnus-ticked-mark (from 4))
(gnus-dormant-mark (from 5))
(gnus-del-mark (from -4) (subject -1))
(gnus-read-mark (from 4) (subject 2))
(gnus-expirable-mark (from -1) (subject -1))
(gnus-killed-mark (from -1) (subject -3))
(gnus-kill-file-mark)
(gnus-ancient-mark)
(gnus-low-score-mark)
(gnus-catchup-mark (from -1) (subject -1))))
(setq-default gnus-summary-mark-below nil)
(setq gnus-parameters
'(("^nnimap.*"
(gnus-use-scoring nil))
("^nnimap.*:lists.*"
(gnus-use-scoring t)
(gnus-use-adaptive-scoring '(word line)))
("^nntp.*"
(gnus-use-scoring nil)
(gnus-summary-mark-below -1000)
(gnus-use-adaptive-scoring '(word line)))))
(add-hook 'gnus-summary-exit-hook
'gnus-summary-bubble-group)
;;; Gnus Registry
(require 'gnus-registry)
(setq gnus-registry-split-strategy 'majority
gnus-registry-ignored-groups '(("^nntp" t)
("^nnfolder" t)
("^nnir" t)
("^nnmaildir" t)
("INBOX$" t))
gnus-registry-max-entries nil
gnus-registry-track-extra '(sender subject recipient)
gnus-registry-cache-file (expand-file-name "gnus.registry.eioioi"
emacs-d))
(setq gnus-refer-article-method
'(current (nnregistry)))
(gnus-registry-initialize)
;;; MIME
(use-package dash
:demand t
:ensure t)
(add-to-list 'gnus-boring-article-headers 'long-to)
(setq gnus-ignored-mime-types '("text/x-vcard")
mm-discouraged-alternatives '("text/richtext" "text/html")
mm-automatic-display (-difference mm-automatic-display
'("text/html"
"text/enriched"
"text/richtext"))
message-forward-as-mime t
gnus-inhibit-mime-unbuttonizing nil
gnus-buttonized-mime-types '("multipart/signed" "multipart/encrypted")
gnus-inhibit-images t)
(setq message-citation-line-function
(lambda ()
(when message-reply-headers
(insert "ghItlhpu' "(mail-header-from message-reply-headers) ":")
(newline))))
(use-package mm-decode
:config (progn
;; Tells Gnus to inline the part
(add-to-list 'mm-inlined-types "application/pgp$")
;; Tells Gnus how to display the part when it is requested
(add-to-list 'mm-inline-media-tests
'("application/pgp$" mm-inline-text identity))
;; Tell Gnus not to wait for a request, just display the thing
;; straight away.
(add-to-list 'mm-automatic-display "application/pgp$")
(setq mm-text-html-renderer 'shr)))
;;; Signing and Encryption
(setq mm-encrypt-option nil
mm-sign-option nil
mm-decrypt-option 'known
mm-verify-option 'known
mml-smime-use 'epg
;;mml2015-encrypt-to-self t
mml2015-display-key-image nil
gnus-message-replysign t
gnus-message-replyencrypt t
gnus-message-replysignencrypted t
mml-secure-cache-passphrase nil
mml-smime-cache-passphrase nil)
;; Automatic encryption if all necessary keys are present
(require 'mail-extr)
(defun db/public-key (address &optional method)
"Return valid public keys for ADDRESS and given METHOD.
METHOD can be \"smime\" or \"pgpmime\"; defaults to \"pgpmime\".
ADDRESS is a string containing exactly one email address."
(check-type address string)
(unless method (setq method "pgpmime"))
(epg-list-keys (epg-make-context
(cond
((string= method "smime")
'CMS)
((string= method "pgpmime")
'OpenPGP)
(t (error "Unknown method %s" method))))
address))
(defun db/encryption-possible-p (recipients method)
"Check whether sending encrypted emails to all RECIPIENTS is possible.
METHOD specifies the encrypt method used. Can be either
\"smime\" or \"pgpmime\"."
(every (lambda (recipient)
(not (null (db/public-key recipient method))))
recipients))
(defun db/message-recipients ()
"Return all recipients of the email in the current buffer."
(cl-mapcan (lambda (field)
(let ((field-value (message-field-value field)))
(when field-value
(mapcar #'cadr
(mail-extract-address-components field-value t)))))
(list "to" "cc" "bcc")))
(defun db/signencrypt-message-when-possible ()
"Add mml markers for signing and encryption of an email if possible."
(interactive)
(when (eq major-mode 'message-mode)
(let ((from (message-field-value "from")))
(when from
(let ((methods (if (string-match "@tu-dresden\.de>" from)
(list "smime" "pgpmime")
(list "pgpmime" "smime")))
(recipients (db/message-recipients)))
;; if there is no recipient, encrypt with default method
(if (null recipients)
(mml-secure-message (first methods) 'signencrypt)
;; go through available keys
(let ((available-method
(cl-find-if (lambda (method)
(db/encryption-possible-p recipients method))
methods)))
(if available-method
(mml-secure-message available-method 'signencrypt)
;; if nothing works, sign with default method
(mml-secure-message (first methods) 'sign)))))))))
(add-hook 'gnus-message-setup-hook
#'db/signencrypt-message-when-possible)
;; inspired by https://www.emacswiki.org/emacs/ExtendSMIME
(use-package ldap
:config (progn
(setq ldap-default-host "")
(setq ldap-default-base "O=DFN-Verein,C=DE"
ldap-ldapsearch-args '("-x" "-tt" "-H ldaps://ldap.pca.dfn.de"))))
(defun db/lookup-smime-key (mail)
"Look up `MAIL' on ldap-server of the DFN.
If found, imports the certificate via gpgsm."
(interactive "sMail: ")
(when (get-buffer " *ldap-value*")
(kill-buffer " *ldap-value*"))
(ldap-search (format "(mail=%s)" mail))
(let ((bufval (get-buffer " *ldap-value*")))
(when bufval
(with-current-buffer bufval
(save-restriction
(widen) ; just to be sure
(let ((result (call-process-region (point-min) (point-max)
"gpgsm"
nil nil nil
"--import")))
(if (zerop result)
(message "Successfully imported certificate for <%s>" mail)
(error "Could not import certificate for <%s>" mail))))))))
;; Fix
(defun mm-view-pkcs7-verify (handle)
(let ((verified nil))
(with-temp-buffer
(if (eq mml-smime-use 'epg)
;; Use gpgsm
(progn
(insert-buffer-substring (mm-handle-buffer handle))
(setq verified (epg-verify-string (epg-make-context 'CMS)
(base64-decode-string (buffer-string)))))
;; FIXME: insert valid signature
;; use openssl
(progn
(insert "MIME-Version: 1.0\n")
(mm-insert-headers "application/pkcs7-mime" "base64" "smime.p7m")
(insert-buffer-substring (mm-handle-buffer handle))
(setq verified (smime-verify-region (point-min) (point-max))))))
(goto-char (point-min))
(mm-insert-part handle)
(if (search-forward "Content-Type: " nil t)
(delete-region (point-min) (match-beginning 0)))
(goto-char (point-max))
(if (re-search-backward "--\r?\n?" nil t)
(delete-region (match-end 0) (point-max)))
(unless verified
(insert-buffer-substring smime-details-buffer)))
(goto-char (point-min))
(while (search-forward "\r\n" nil t)
(replace-match "\n"))
t)
;;; Custom commands
(bind-key "v u"
'(lambda ()
(interactive)
(save-mark-and-excursion
(when (gnus-topic-select-group)
(gnus-summary-exit))))
gnus-group-mode-map)
(bind-key "v j"
'(lambda ()
(interactive)
(gnus-agent-toggle-plugged nil)
(gnus-agent-toggle-plugged t)
(gnus-group-get-new-news 3))
gnus-group-mode-map)
(add-hook 'gnus-get-new-news-hook
(lambda ()
(when gnus-plugged
(gnus-agent-toggle-plugged nil)
(gnus-agent-toggle-plugged t))))
;; (bind-key "v g" #'db/get-mail gnus-group-mode-map)
(bind-key "v c"
(lambda ()
(interactive)
(save-mark-and-excursion
(gnus-topic-jump-to-topic "News")
(gnus-topic-read-group)))
gnus-group-mode-map)
(defun db/gnus-summary-open-Link ()
"Open link named \"Link\" in current article."
(interactive)
(save-window-excursion
(save-mark-and-excursion
(save-restriction
(widen)
(let ((url nil))
(unless (eq major-mode 'gnus-article-mode)
(gnus-summary-select-article-buffer))
(goto-char (point-min))
(while (and (not url)
(search-forward "Link"))
(backward-char)
(setq url (get-text-property (point) 'shr-url)))
(when url
(browse-url url)))))))
(bind-key "C-<return>" #'db/gnus-summary-open-Link gnus-summary-mode-map)
(bind-key "C-<return>" #'db/gnus-summary-open-Link gnus-article-mode-map)
;;; Timeout for fetching news
(setq nntp-connection-timeout nil)
;;; Agents
(setq gnus-agent-mark-unread-after-downloaded nil
gnus-agent-synchronize-flags t
gnus-agent-go-online t)
;;; Do some pretty printing before saving the newsrc file
(defun db/gnus-save-newsrc-with-whitespace-1 ()
"Save ~/.newsrc.eld with extra whitespace."
;; http://ding.gnus.narkive.com/pq3Z8ZjQ/pretty-printing-newsrc-eld#post3
(gnus-message 5 "Adding whitespace to .newsrc.eld")
(save-excursion
(goto-char (point-min))
(while (re-search-forward "(\\\"\\| ((\\| (nn" nil t)
(replace-match "\n \\&" t))
(delete-trailing-whitespace)))
(add-hook 'gnus-save-quick-newsrc-hook #'db/gnus-save-newsrc-with-whitespace-1)
;;; Mail Formatting
(setq gnus-posting-styles
`((".*"
(name ,user-full-name)
(address ,db/work-mail-address)
(signature-file "~/.signature-minimal")
("X-Jabber-ID" ,db/jabber-id))
(message-mail-p
(signature-file "~/.signature"))
("algebra20:.*"
(address ,db/personal-mail-address)
(signature-file "~/.signature"))
("tu:.*"
(name ,user-full-name)
(address ,db/work-mail-address)
(signature-file "~/.signature-official"))))
;; http://mbork.pl/2015-11-28_Fixing_mml-attach-file_using_advice
(defun db/mml-attach-file--go-to-eob (orig-fun &rest args)
"Go to the end of buffer before attaching files."
(save-excursion
(save-restriction
(widen)
(goto-char (point-max))
(apply orig-fun args))))
(advice-add 'mml-attach-file :around #'db/mml-attach-file--go-to-eob)
;;; Archiving
;; FIXME: this is obsolete
(setq gnus-message-archive-method
`(nnfolder "archive"
(nnfolder-inhibit-expiry t)
(nnfolder-active-file ,(expand-file-name "archive/active" gnus-directory))
(nnfolder-directory ,(expand-file-name "archive/" gnus-directory)))
gnus-update-message-archive-method t
gnus-message-archive-group "archive"
gnus-gcc-mark-as-read t)
;;; SMTP configuration
(require 'smtpmail)
(require 'starttls)
(defadvice smtpmail-send-it (around display-trace-buffer disable)
"If an error is signalled, display the process buffer."
(condition-case signals-data
ad-do-it
(error (shrink-window-if-larger-than-buffer
(display-buffer (get-buffer (format "*trace of SMTP session to %s*"
smtpmail-smtp-server))))
(signal (car signals-data) (cdr signals-data)))))
(setq send-mail-function 'smtpmail-send-it
smtpmail-stream-type 'starttls
smtpmail-smtp-service 587
starttls-use-gnutls t
starttls-extra-arguments '("--strict-tofu")
smtpmail-smtp-server (nth 1 (car db/smtp-accounts))
smtpmail-smtp-user (nth 4 (car db/smtp-accounts)))
(defun db/set-smtp-server-from-header (orig-fun &rest args)
"Choose smtp-settings dynamically, based on the From: header
entry of the current mail."
(require 'mail-extr)
(let* ((from (or (save-restriction
(message-narrow-to-headers)
(mail-fetch-field "From"))
user-mail-address))
(address (cadr (mail-extract-address-components from)))
;; db/smtp-accounts set in db-private
(account (assoc address db/smtp-accounts)))
(message "Using address: %s" address)
(if account
(progn
(message "Sending with account for %s" address)
(cl-destructuring-bind (smtpmail-smtp-server
smtpmail-stream-type
smtpmail-smtp-service
smtpmail-smtp-user)
(cdr account)
(apply orig-fun args)))
(progn
(message "Sending with default account settings")
(apply orig-fun args)))))
(advice-add 'smtpmail-via-smtp
:around #'db/set-smtp-server-from-header)
(setq smtpmail-debug-info t)
;;; Notmuch
(require 'nnir)
(setq nnir-method-default-engines '((nnimap . imap)
(nnmaildir . notmuch)
(nntp . gmane)))
(use-package notmuch
:config (progn
;; (bind-key "GG" 'notmuch-search gnus-group-mode-map)
(defun db/notmuch-search-update-index (orig-fun &rest args)
"Update notmuch index before searching"
(message "Indexing new Mail...")
(shell-command "notmuch new --quiet 2>&1 | grep -v \"Note: Ignoring\"")
(message "Indexing new Mail... done.")
(apply orig-fun args))
(advice-add 'notmuch-search
:around #'db/notmuch-search-update-index)
(advice-add 'nnir-run-notmuch
:around #'db/notmuch-search-update-index)
(setq notmuch-fcc-dirs nil)))
;;;
t