guix/.dir-locals.el

;; Per-directory local variables for GNU Emacs 23 and later.

((nil
  . ((fill-column . 78)
     (tab-width   .  8)
     (sentence-end-double-space . t)

     ;; For use with 'bug-reference-prog-mode'.
     (bug-reference-bug-regexp
      . "\\(<https?://\\bugs\\.gnu\\.org/\\([0-9]+\\)>\\)")
     (bug-reference-url-format . "https://bugs.gnu.org/%s")

     (eval . (add-to-list 'completion-ignored-extensions ".go"))

     ;; Emacs-Guix
     (eval . (setq-local guix-directory
                         (locate-dominating-file default-directory
                                                 ".dir-locals.el")))

     ;; YASnippet
     (eval . (with-eval-after-load
                 'yasnippet
               (let ((guix-yasnippets
                      (expand-file-name
                       "etc/snippets/yas"
                       (locate-dominating-file default-directory
                                               ".dir-locals.el"))))
                 (unless (member guix-yasnippets yas-snippet-dirs)
                   (add-to-list 'yas-snippet-dirs guix-yasnippets)
                   (yas-reload-all)))))

     ;; Geiser
     ;; This allows automatically setting the `geiser-guile-load-path'
     ;; variable when using various Guix checkouts (e.g., via git worktrees).
     (eval . (let ((root-dir-unexpanded (locate-dominating-file
                                         default-directory ".dir-locals.el")))
               ;; While Guix should in theory always have a .dir-locals.el
               ;; (we are reading this file, after all) there seems to be a
               ;; strange problem where this code "escapes" to some other buffers,
               ;; at least vc-mode.  See:
               ;;   https://lists.gnu.org/archive/html/guix-devel/2020-11/msg00296.html
               ;; Upstream report: <https://bugs.gnu.org/44698>
               ;; Hence the following "when", which might otherwise be unnecessary;
               ;; it prevents causing an error when root-dir-unexpanded is nil.
               (when root-dir-unexpanded
                 (let* ((root-dir (file-local-name (expand-file-name root-dir-unexpanded)))
                        ;; Workaround for bug https://issues.guix.gnu.org/43818.
                        (root-dir* (directory-file-name root-dir)))

                   (unless (boundp 'geiser-guile-load-path)
                     (defvar geiser-guile-load-path '()))
                   (make-local-variable 'geiser-guile-load-path)
                   (require 'cl-lib)
                   (cl-pushnew root-dir* geiser-guile-load-path
                               :test #'string-equal)))))))

 (c-mode          . ((c-file-style . "gnu")))
 (scheme-mode
  .
  ((indent-tabs-mode . nil)
   (eval . (put 'eval-when 'scheme-indent-function 1))
   (eval . (put 'call-with-prompt 'scheme-indent-function 1))
   (eval . (put 'test-assert 'scheme-indent-function 1))
   (eval . (put 'test-assertm 'scheme-indent-function 2))
   (eval . (put 'test-equalm 'scheme-indent-function 1))
   (eval . (put 'test-equal 'scheme-indent-function 1))
   (eval . (put 'test-eq 'scheme-indent-function 1))
   (eval . (put 'call-with-input-string 'scheme-indent-function 1))
   (eval . (put 'call-with-port 'scheme-indent-function 1))
   (eval . (put 'guard 'scheme-indent-function 1))
   (eval . (put 'lambda* 'scheme-indent-function 1))
   (eval . (put 'substitute* 'scheme-indent-function 1))
   (eval . (put 'match-record 'scheme-indent-function 2))

   ;; TODO: Contribute these to Emacs' scheme-mode.
   (eval . (put 'let-keywords 'scheme-indent-function 3))

   ;; 'modify-inputs' and its keywords.
   (eval . (put 'modify-inputs 'scheme-indent-function 1))
   (eval . (put 'replace 'scheme-indent-function 1))

   ;; 'modify-phases' and its keywords.
   (eval . (put 'modify-phases 'scheme-indent-function 1))
   (eval . (put 'replace 'scheme-indent-function 1))
   (eval . (put 'add-before 'scheme-indent-function 2))
   (eval . (put 'add-after 'scheme-indent-function 2))

   (eval . (put 'modify-services 'scheme-indent-function 1))
   (eval . (put 'with-directory-excursion 'scheme-indent-function 1))
   (eval . (put 'with-file-lock 'scheme-indent-function 1))
   (eval . (put 'with-file-lock/no-wait 'scheme-indent-function 1))
   (eval . (put 'with-profile-lock 'scheme-indent-function 1))
   (eval . (put 'with-writable-file 'scheme-indent-function 2))

   (eval . (put 'package 'scheme-indent-function 0))
   (eval . (put 'package/inherit 'scheme-indent-function 1))
   (eval . (put 'origin 'scheme-indent-function 0))
   (eval . (put 'build-system 'scheme-indent-function 0))
   (eval . (put 'bag 'scheme-indent-function 0))
   (eval . (put 'computed-file 'scheme-indent-function 1))
   (eval . (put 'gexp->derivation 'scheme-indent-function 1))
   (eval . (put 'graft 'scheme-indent-function 0))
   (eval . (put 'operating-system 'scheme-indent-function 0))
   (eval . (put 'file-system 'scheme-indent-function 0))
   (eval . (put 'manifest-entry 'scheme-indent-function 0))
   (eval . (put 'manifest-pattern 'scheme-indent-function 0))
   (eval . (put 'substitute-keyword-arguments 'scheme-indent-function 1))
   (eval . (put 'with-store 'scheme-indent-function 1))
   (eval . (put 'with-external-store 'scheme-indent-function 1))
   (eval . (put 'with-error-handling 'scheme-indent-function 0))
   (eval . (put 'with-mutex 'scheme-indent-function 1))
   (eval . (put 'with-atomic-file-output 'scheme-indent-function 1))
   (eval . (put 'call-with-compressed-output-port 'scheme-indent-function 2))
   (eval . (put 'call-with-decompressed-port 'scheme-indent-function 2))
   (eval . (put 'call-with-gzip-input-port 'scheme-indent-function 1))
   (eval . (put 'call-with-gzip-output-port 'scheme-indent-function 1))
   (eval . (put 'call-with-lzip-input-port 'scheme-indent-function 1))
   (eval . (put 'call-with-lzip-output-port 'scheme-indent-function 1))
   (eval . (put 'signature-case 'scheme-indent-function 1))
   (eval . (put 'emacs-batch-eval 'scheme-indent-function 0))
   (eval . (put 'emacs-batch-edit-file 'scheme-indent-function 1))
   (eval . (put 'emacs-substitute-sexps 'scheme-indent-function 1))
   (eval . (put 'emacs-substitute-variables 'scheme-indent-function 1))
   (eval . (put 'with-derivation-narinfo 'scheme-indent-function 1))
   (eval . (put 'with-derivation-substitute 'scheme-indent-function 2))
   (eval . (put 'with-status-report 'scheme-indent-function 1))
   (eval . (put 'with-status-verbosity 'scheme-indent-function 1))
   (eval . (put 'with-build-handler 'scheme-indent-function 1))

   (eval . (put 'mlambda 'scheme-indent-function 1))
   (eval . (put 'mlambdaq 'scheme-indent-function 1))
   (eval . (put 'syntax-parameterize 'scheme-indent-function 1))
   (eval . (put 'with-monad 'scheme-indent-function 1))
   (eval . (put 'mbegin 'scheme-indent-function 1))
   (eval . (put 'mwhen 'scheme-indent-function 1))
   (eval . (put 'munless 'scheme-indent-function 1))
   (eval . (put 'mlet* 'scheme-indent-function 2))
   (eval . (put 'mlet 'scheme-indent-function 2))
   (eval . (put 'mparameterize 'scheme-indent-function 2))
   (eval . (put 'run-with-store 'scheme-indent-function 1))
   (eval . (put 'run-with-state 'scheme-indent-function 1))
   (eval . (put 'wrap-program 'scheme-indent-function 1))
   (eval . (put 'wrap-script 'scheme-indent-function 1))
   (eval . (put 'with-imported-modules 'scheme-indent-function 1))
   (eval . (put 'with-extensions 'scheme-indent-function 1))
   (eval . (put 'with-parameters 'scheme-indent-function 1))
   (eval . (put 'let-system 'scheme-indent-function 1))
   (eval . (put 'with-build-variables 'scheme-indent-function 2))

   (eval . (put 'with-database 'scheme-indent-function 2))
   (eval . (put 'call-with-database 'scheme-indent-function 1))
   (eval . (put 'call-with-transaction 'scheme-indent-function 1))
   (eval . (put 'with-statement 'scheme-indent-function 3))
   (eval . (put 'call-with-retrying-transaction 'scheme-indent-function 1))
   (eval . (put 'call-with-savepoint 'scheme-indent-function 1))
   (eval . (put 'call-with-retrying-savepoint 'scheme-indent-function 1))

   (eval . (put 'call-with-container 'scheme-indent-function 1))
   (eval . (put 'container-excursion 'scheme-indent-function 1))
   (eval . (put 'eventually 'scheme-indent-function 1))

   (eval . (put 'call-with-progress-reporter 'scheme-indent-function 1))
   (eval . (put 'with-repository 'scheme-indent-function 2))
   (eval . (put 'with-temporary-git-repository 'scheme-indent-function 2))
   (eval . (put 'with-environment-variables 'scheme-indent-function 1))
   (eval . (put 'with-fresh-gnupg-setup 'scheme-indent-function 1))

   (eval . (put 'with-paginated-output-port 'scheme-indent-function 1))

   (eval . (put 'with-shepherd-action 'scheme-indent-function 3))

   (eval . (put 'with-http-server 'scheme-indent-function 1))

   ;; This notably allows '(' in Paredit to not insert a space when the
   ;; preceding symbol is one of these.
   (eval . (modify-syntax-entry ?~ "'"))
   (eval . (modify-syntax-entry ?$ "'"))
   (eval . (modify-syntax-entry ?+ "'"))

   ;; Emacs 28 changed the behavior of 'lisp-fill-paragraph', which causes the
   ;; first line of package descriptions to extrude past 'fill-column', and
   ;; somehow that is deemed more correct upstream (see:
   ;; https://issues.guix.gnu.org/56197).
   (eval . (progn
             (require 'lisp-mode)
             (defun emacs27-lisp-fill-paragraph (&optional justify)
               (interactive "P")
               (or (fill-comment-paragraph justify)
                   (let ((paragraph-start
                          (concat paragraph-start
                                  "\\|\\s-*\\([(;\"]\\|\\s-:\\|`(\\|#'(\\)"))
                         (paragraph-separate
                          (concat paragraph-separate "\\|\\s-*\".*[,\\.]$"))
                         (fill-column (if (and (integerp emacs-lisp-docstring-fill-column)
                                               (derived-mode-p 'emacs-lisp-mode))
                                          emacs-lisp-docstring-fill-column
                                        fill-column)))
                     (fill-paragraph justify))
                   ;; Never return nil.
                   t))
             (setq-local fill-paragraph-function #'emacs27-lisp-fill-paragraph)))))

 (emacs-lisp-mode . ((indent-tabs-mode . nil)))
 (texinfo-mode    . ((indent-tabs-mode . nil)
                     (fill-column . 72))))