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name: emacs/guix-devel.el 	 # note: path name is non-authoritative(*)

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;;; guix-devel.el --- Development tools   -*- lexical-binding: t -*-

;; Copyright © 2015 Alex Kost <alezost@gmail.com>

;; This file is part of GNU Guix.

;; GNU Guix is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Guix is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with this program.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This file provides commands useful for developing Guix (or even
;; arbitrary Guile code) with Geiser.

;;; Code:

(require 'guix-guile)
(require 'guix-geiser)
(require 'guix-utils)
(require 'guix-base)

(defgroup guix-devel nil
  "Settings for Guix development utils."
  :group 'guix)

(defgroup guix-devel-faces nil
  "Faces for `guix-devel-mode'."
  :group 'guix-devel
  :group 'guix-faces)

(defface guix-devel-modify-phases-keyword
  '((t :inherit font-lock-preprocessor-face))
  "Face for a `modify-phases' keyword ('delete', 'replace', etc.)."
  :group 'guix-devel-faces)

(defcustom guix-devel-activate-mode t
  "If non-nil, then `guix-devel-mode' is automatically activated
in Scheme buffers."
  :type 'boolean
  :group 'guix-devel)

(defun guix-devel-use-modules (&rest modules)
  "Use guile MODULES."
  (apply #'guix-geiser-call "use-modules" modules))

(defun guix-devel-use-module (&optional module)
  "Use guile MODULE in the current Geiser REPL.
MODULE is a string with the module name - e.g., \"(ice-9 match)\".
Interactively, use the module defined by the current scheme file."
  (interactive (list (guix-guile-current-module)))
  (guix-devel-use-modules module)
  (message "Using %s module." module))

(defun guix-devel-copy-module-as-kill ()
  "Put the name of the current guile module into `kill-ring'."
  (interactive)
  (guix-copy-as-kill (guix-guile-current-module)))

(defun guix-devel-setup-repl (&optional repl)
  "Setup REPL for using `guix-devel-...' commands."
  (guix-devel-use-modules "(guix monad-repl)"
                          "(guix packages)"
                          "(guix scripts)"
                          "(guix store)"
                          "(guix ui)")
  ;; Without this workaround, the warning/build output disappears.  See
  ;; <https://github.com/jaor/geiser/issues/83> for details.
  (guix-geiser-eval-in-repl
   "(begin
      (guix-warning-port (current-warning-port))
      (current-build-output-port (current-error-port)))"
   repl 'no-history 'no-display))

(defvar guix-devel-repl-processes nil
  "List of REPL processes configured by `guix-devel-setup-repl'.")

(defun guix-devel-setup-repl-maybe (&optional repl)
  "Setup (if needed) REPL for using `guix-devel-...' commands."
  (let ((process (get-buffer-process (or repl (guix-geiser-repl)))))
    (when (and process
               (not (memq process guix-devel-repl-processes)))
      (guix-devel-setup-repl repl)
      (push process guix-devel-repl-processes))))

(defmacro guix-devel-with-definition (def-var &rest body)
  "Run BODY with the current guile definition bound to DEF-VAR.
Bind DEF-VAR variable to the name of the current top-level
definition, setup the current REPL, use the current module, and
run BODY."
  (declare (indent 1) (debug (symbolp body)))
  `(let ((,def-var (guix-guile-current-definition)))
     (guix-devel-setup-repl-maybe)
     (guix-devel-use-modules (guix-guile-current-module))
     ,@body))

(defun guix-devel-build-package-definition ()
  "Build a package defined by the current top-level variable definition."
  (interactive)
  (guix-devel-with-definition def
    (when (or (not guix-operation-confirm)
              (guix-operation-prompt (format "Build '%s'?" def)))
      (guix-geiser-eval-in-repl
       (concat ",run-in-store "
               (guix-guile-make-call-expression
                "build-package" def
                "#:use-substitutes?" (guix-guile-boolean
                                      guix-use-substitutes)
                "#:dry-run?" (guix-guile-boolean guix-dry-run)))))))

(defun guix-devel-download-package-source ()
  "Download the source of the current package.
Use this function to compute SHA256 hash of the package source."
  (interactive)
  (guix-devel-with-definition def
    (guix-devel-use-modules "(guix scripts download)")
    (when (or (not guix-operation-confirm)
              (y-or-n-p (format "Download '%s' package source?" def)))
      (guix-geiser-eval-in-repl
       (format "(guix-download (origin-uri (package-source %s)))"
               def)))))

(defun guix-devel-lint-package ()
  "Check the current package.
See Info node `(guix) Invoking guix lint' for details."
  (interactive)
  (guix-devel-with-definition def
    (guix-devel-use-modules "(guix scripts lint)")
    (when (or (not guix-operation-confirm)
              (y-or-n-p (format "Lint '%s' package?" def)))
      (guix-geiser-eval-in-repl
       (format "(run-checkers %s)" def)))))

\f
;;; Font-lock

(defvar guix-devel-modify-phases-keyword-regexp
  (rx (+ word))
  "Regexp for a 'modify-phases' keyword ('delete', 'replace', etc.).")

(defun guix-devel-modify-phases-font-lock-matcher (limit)
  "Find a 'modify-phases' keyword.
This function is used as a MATCHER for `font-lock-keywords'."
  (ignore-errors
    (down-list)
    (or (re-search-forward guix-devel-modify-phases-keyword-regexp
                           limit t)
        (set-match-data nil))
    (up-list)
    t))

(defun guix-devel-modify-phases-font-lock-pre ()
  "Skip the next sexp, and return the end point of the current list.
This function is used as a PRE-MATCH-FORM for `font-lock-keywords'
to find 'modify-phases' keywords."
  (ignore-errors (forward-sexp))
  (save-excursion (up-list) (point)))

(defvar guix-devel-font-lock-keywords
  `((,(guix-guile-keyword-regexp "modify-phases")
     (1 'font-lock-keyword-face)
     (guix-devel-modify-phases-font-lock-matcher
      (guix-devel-modify-phases-font-lock-pre)
      nil
      (0 'guix-devel-modify-phases-keyword nil t))))
  "A list of `font-lock-keywords' for `guix-devel-mode'.")

\f
(defvar guix-devel-keys-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "b") 'guix-devel-build-package-definition)
    (define-key map (kbd "l") 'guix-devel-lint-package)
    (define-key map (kbd "s") 'guix-devel-download-package-source)
    (define-key map (kbd "k") 'guix-devel-copy-module-as-kill)
    (define-key map (kbd "u") 'guix-devel-use-module)
    map)
  "Keymap with subkeys for `guix-devel-mode-map'.")

(defvar guix-devel-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "C-c .") guix-devel-keys-map)
    map)
  "Keymap for `guix-devel-mode'.")

;;;###autoload
(define-minor-mode guix-devel-mode
  "Minor mode for `scheme-mode' buffers.

With a prefix argument ARG, enable the mode if ARG is positive,
and disable it otherwise.  If called from Lisp, enable the mode
if ARG is omitted or nil.

When Guix Devel mode is enabled, it provides the following key
bindings:

\\{guix-devel-mode-map}"
  :init-value nil
  :lighter " Guix"
  :keymap guix-devel-mode-map
  (if guix-devel-mode
      (progn
        (setq-local font-lock-multiline t)
        (font-lock-add-keywords nil guix-devel-font-lock-keywords))
    (setq-local font-lock-multiline nil)
    (font-lock-remove-keywords nil guix-devel-font-lock-keywords))
  (when font-lock-mode
    (font-lock-fontify-buffer)))

;;;###autoload
(defun guix-devel-activate-mode-maybe ()
  "Activate `guix-devel-mode' depending on
`guix-devel-activate-mode' variable."
  (when guix-devel-activate-mode
    (guix-devel-mode)))

\f
(defvar guix-devel-font-lock-keywords
  (eval-when-compile
    `((,(rx "(" (group "guix-devel-with-definition") symbol-end) . 1))))

(font-lock-add-keywords 'emacs-lisp-mode guix-devel-font-lock-keywords)

(provide 'guix-devel)

;;; guix-devel.el ends here

debug log:

solving 4d380ce ...
found 4d380ce in https://yhetil.org/guix/1443791046-1015-5-git-send-email-alezost@gmail.com/
found a8167a0 in https://yhetil.org/guix/1443791046-1015-3-git-send-email-alezost@gmail.com/
found ee7629f in https://yhetil.org/guix/1443791046-1015-2-git-send-email-alezost@gmail.com/
found 8a6fc1e in https://git.savannah.gnu.org/cgit/guix.git
preparing index
index prepared:
100644 8a6fc1ec08700b30d92640df56a7f7f24bb20950	emacs/guix-devel.el

applying [1/3] https://yhetil.org/guix/1443791046-1015-2-git-send-email-alezost@gmail.com/
diff --git a/emacs/guix-devel.el b/emacs/guix-devel.el
index 8a6fc1e..ee7629f 100644


applying [2/3] https://yhetil.org/guix/1443791046-1015-3-git-send-email-alezost@gmail.com/
diff --git a/emacs/guix-devel.el b/emacs/guix-devel.el
index ee7629f..a8167a0 100644


applying [3/3] https://yhetil.org/guix/1443791046-1015-5-git-send-email-alezost@gmail.com/
diff --git a/emacs/guix-devel.el b/emacs/guix-devel.el
index a8167a0..4d380ce 100644

Checking patch emacs/guix-devel.el...
Applied patch emacs/guix-devel.el cleanly.
Checking patch emacs/guix-devel.el...
Applied patch emacs/guix-devel.el cleanly.
Checking patch emacs/guix-devel.el...
Applied patch emacs/guix-devel.el cleanly.

index at:
100644 4d380ce4031413f57143a4c5cfbde7a87502393d	emacs/guix-devel.el

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