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22.3.1 Viewing Bugs within Emacs

Emacs has a nice minor mode called bug-reference, which, when combined with ‘emacs-debbugs’ (the Emacs package), can be used to open links such as ‘<https://bugs.gnu.org/58697>’ or ‘<https://issues.guix.gnu.org/58697>’ as bug report buffers. From there you can easily consult the email thread via the Gnus interface, reply or modify the bug status, all without leaving the comfort of Emacs! Below is a sample configuration to add to your ~/.emacs configuration file:

;;; Bug references.
(require 'bug-reference)
(add-hook 'prog-mode-hook #'bug-reference-prog-mode)
(add-hook 'gnus-mode-hook #'bug-reference-mode)
(add-hook 'erc-mode-hook #'bug-reference-mode)
(add-hook 'gnus-summary-mode-hook #'bug-reference-mode)
(add-hook 'gnus-article-mode-hook #'bug-reference-mode)

;;; This extends the default expression (the top-most, first expression
;;; provided to 'or') to also match URLs such as
;;; <https://issues.guix.gnu.org/58697> or <https://bugs.gnu.org/58697>.
;;; It is also extended to detect "Fixes: #NNNNN" git trailers.
(setq bug-reference-bug-regexp
      (rx (group (or (seq word-boundary
                          (or (seq (char "Bb") "ug"
                                   (zero-or-one " ")
                                   (zero-or-one "#"))
                              (seq (char "Pp") "atch"
                                   (zero-or-one " ")
                                   "#")
                              (seq (char "Ff") "ixes"
                                   (zero-or-one ":")
                                   (zero-or-one " ") "#")
                              (seq "RFE"
                                   (zero-or-one " ") "#")
                              (seq "PR "
                                   (one-or-more (char "a-z+-")) "/"))
                          (group (one-or-more (char "0-9"))
                                 (zero-or-one
                                  (seq "#" (one-or-more
                                            (char "0-9"))))))
                     (seq (? "<") "https://bugs.gnu.org/"
                          (group-n 2 (one-or-more (char "0-9")))
                          (? ">"))
                     (seq (? "<") "https://issues.guix.gnu.org/"
                          (? "issue/")
                          (group-n 2 (one-or-more (char "0-9")))
                          (? ">"))))))
(setq bug-reference-url-format "https://issues.guix.gnu.org/%s")

(require 'debbugs)
(require 'debbugs-browse)
(add-hook 'bug-reference-mode-hook #'debbugs-browse-mode)
(add-hook 'bug-reference-prog-mode-hook #'debbugs-browse-mode)

;; The following allows Emacs Debbugs user to open the issue directly within
;; Emacs.
(setq debbugs-browse-url-regexp
      (rx line-start
          "http" (zero-or-one "s") "://"
          (or "debbugs" "issues.guix" "bugs")
          ".gnu.org" (one-or-more "/")
          (group (zero-or-one "cgi/bugreport.cgi?bug="))
          (group-n 3 (one-or-more digit))
          line-end))

;; Change the default when run as 'M-x debbugs-gnu'.
(setq debbugs-gnu-default-packages '("guix" "guix-patches"))

;; Show feature requests.
(setq debbugs-gnu-default-severities
 '("serious" "important" "normal" "minor" "wishlist"))

For more information, refer to Bug Reference in The GNU Emacs Manual and Minor Mode in The Debbugs User Guide.


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