79c7a8f214
* emacs/guix-base.el (guix-directory, guix-read-directory) (guix-set-directory): Move to "guix-backend.el". (guix-find-location, guix-package-location, guix-edit): Move to... * emacs/guix-location.el: ... here. New file. * emacs/guix-ui-package.el: Use it. * emacs.am (ELFILES): Add it.
393 lines
15 KiB
EmacsLisp
393 lines
15 KiB
EmacsLisp
;;; guix-backend.el --- Making and using Guix REPL
|
||
|
||
;; Copyright © 2014, 2015, 2016 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 the code for interacting with Guile using Guix REPL
|
||
;; (Geiser REPL with some guix-specific additions).
|
||
|
||
;; By default (if `guix-use-guile-server' is non-nil) 2 Guix REPLs are
|
||
;; started. The main one (with "guile --listen" process) is used for
|
||
;; "interacting" with a user - for showing a progress of
|
||
;; installing/deleting Guix packages. The second (internal) REPL is
|
||
;; used for synchronous evaluating, e.g. when information about
|
||
;; packages/generations should be received for a list/info buffer.
|
||
;;
|
||
;; This "2 REPLs concept" makes it possible to have a running process of
|
||
;; installing/deleting packages and to continue to search/list/get info
|
||
;; about other packages at the same time. If you prefer to use a single
|
||
;; Guix REPL, do not try to receive any information while there is a
|
||
;; running code in the REPL (see
|
||
;; <https://github.com/jaor/geiser/issues/28>).
|
||
;;
|
||
;; Guix REPLs (unlike the usual Geiser REPLs) are not added to
|
||
;; `geiser-repl--repls' variable, and thus cannot be used for evaluating
|
||
;; while editing scm-files. The only purpose of Guix REPLs is to be an
|
||
;; intermediate between "Guix/Guile level" and "Emacs interface level".
|
||
;; That being said you can still want to use a Guix REPL while hacking
|
||
;; auxiliary scheme-files for "guix.el". You can just use
|
||
;; `geiser-connect-local' command with `guix-repl-current-socket' to
|
||
;; have a usual Geiser REPL with all stuff defined by "guix.el" package.
|
||
|
||
;;; Code:
|
||
|
||
(require 'geiser-mode)
|
||
(require 'geiser-guile)
|
||
(require 'guix-geiser)
|
||
(require 'guix-config)
|
||
(require 'guix-external)
|
||
(require 'guix-emacs)
|
||
(require 'guix-profiles)
|
||
|
||
(defvar guix-load-path guix-config-emacs-interface-directory
|
||
"Directory with scheme files for \"guix.el\" package.")
|
||
|
||
(defvar guix-helper-file
|
||
(expand-file-name "guix-helper.scm" guix-load-path)
|
||
"Auxiliary scheme file for loading.")
|
||
|
||
|
||
;;; REPL
|
||
|
||
(defgroup guix-repl nil
|
||
"Settings for Guix REPLs."
|
||
:prefix "guix-repl-"
|
||
:group 'guix)
|
||
|
||
(defcustom guix-repl-startup-time 30000
|
||
"Time, in milliseconds, to wait for Guix REPL to startup.
|
||
Same as `geiser-repl-startup-time' but is used for Guix REPL.
|
||
If you have a slow system, try to increase this time."
|
||
:type 'integer
|
||
:group 'guix-repl)
|
||
|
||
(defcustom guix-repl-buffer-name "*Guix REPL*"
|
||
"Default name of a Geiser REPL buffer used for Guix."
|
||
:type 'string
|
||
:group 'guix-repl)
|
||
|
||
(defcustom guix-after-start-repl-hook '(guix-set-directory)
|
||
"Hook called after Guix REPL is started."
|
||
:type 'hook
|
||
:group 'guix-repl)
|
||
|
||
(defcustom guix-use-guile-server t
|
||
"If non-nil, start guile with '--listen' argument.
|
||
This allows to receive information about packages using an additional
|
||
REPL while some packages are being installed/removed in the main REPL."
|
||
:type 'boolean
|
||
:group 'guix-repl)
|
||
|
||
(defcustom guix-repl-socket-file-name-function
|
||
#'guix-repl-socket-file-name
|
||
"Function used to define a socket file name used by Guix REPL.
|
||
The function is called without arguments."
|
||
:type '(choice (function-item guix-repl-socket-file-name)
|
||
(function :tag "Other function"))
|
||
:group 'guix-repl)
|
||
|
||
(defcustom guix-emacs-activate-after-operation t
|
||
"Activate Emacs packages after installing.
|
||
If nil, do not load autoloads of the Emacs packages after
|
||
they are successfully installed."
|
||
:type 'boolean
|
||
:group 'guix-repl)
|
||
|
||
(defvar guix-repl-current-socket nil
|
||
"Name of a socket file used by the current Guix REPL.")
|
||
|
||
(defvar guix-repl-buffer nil
|
||
"Main Geiser REPL buffer used for communicating with Guix.
|
||
This REPL is used for processing package actions and for
|
||
receiving information if `guix-use-guile-server' is nil.")
|
||
|
||
(defvar guix-internal-repl-buffer nil
|
||
"Additional Geiser REPL buffer used for communicating with Guix.
|
||
This REPL is used for receiving information only if
|
||
`guix-use-guile-server' is non-nil.")
|
||
|
||
(defvar guix-internal-repl-buffer-name "*Guix Internal REPL*"
|
||
"Default name of an internal Guix REPL buffer.")
|
||
|
||
(defvar guix-before-repl-operation-hook nil
|
||
"Hook run before executing an operation in Guix REPL.")
|
||
|
||
(defvar guix-after-repl-operation-hook
|
||
'(guix-repl-autoload-emacs-packages-maybe
|
||
guix-repl-operation-success-message)
|
||
"Hook run after executing successful operation in Guix REPL.")
|
||
|
||
(defvar guix-repl-operation-p nil
|
||
"Non-nil, if current operation is performed by `guix-eval-in-repl'.
|
||
This internal variable is used to distinguish Guix operations
|
||
from operations performed in Guix REPL by a user.")
|
||
|
||
(defvar guix-repl-operation-type nil
|
||
"Type of the current operation performed by `guix-eval-in-repl'.
|
||
This internal variable is used to define what actions should be
|
||
executed after the current operation succeeds.
|
||
See `guix-eval-in-repl' for details.")
|
||
|
||
(defun guix-repl-autoload-emacs-packages-maybe ()
|
||
"Load autoloads for Emacs packages if needed.
|
||
See `guix-emacs-activate-after-operation' for details."
|
||
(and guix-emacs-activate-after-operation
|
||
;; FIXME Since a user can work with a non-current profile (using
|
||
;; C-u before `guix-search-by-name' and other commands), emacs
|
||
;; packages can be installed to another profile, and the
|
||
;; following code will not work (i.e., the autoloads for this
|
||
;; profile will not be loaded).
|
||
(guix-emacs-autoload-packages guix-current-profile)))
|
||
|
||
(defun guix-repl-operation-success-message ()
|
||
"Message telling about successful Guix operation."
|
||
(message "Guix operation has been performed."))
|
||
|
||
(defun guix-get-guile-program (&optional socket)
|
||
"Return a value suitable for `geiser-guile-binary'."
|
||
(if (null socket)
|
||
guix-guile-program
|
||
(append (if (listp guix-guile-program)
|
||
guix-guile-program
|
||
(list guix-guile-program))
|
||
(list (concat "--listen=" socket)))))
|
||
|
||
(defun guix-repl-socket-file-name ()
|
||
"Return a name of a socket file used by Guix REPL."
|
||
(make-temp-name
|
||
(concat (file-name-as-directory temporary-file-directory)
|
||
"guix-repl-")))
|
||
|
||
(defun guix-repl-delete-socket-maybe ()
|
||
"Delete `guix-repl-current-socket' file if it exists."
|
||
(and guix-repl-current-socket
|
||
(file-exists-p guix-repl-current-socket)
|
||
(delete-file guix-repl-current-socket)))
|
||
|
||
(add-hook 'kill-emacs-hook 'guix-repl-delete-socket-maybe)
|
||
|
||
(defun guix-start-process-maybe (&optional start-msg end-msg)
|
||
"Start Geiser REPL configured for Guix if needed.
|
||
START-MSG and END-MSG are strings displayed in the minibuffer in
|
||
the beginning and in the end of the starting process. If nil,
|
||
display default messages."
|
||
(guix-start-repl-maybe nil
|
||
(or start-msg "Starting Guix REPL ...")
|
||
(or end-msg "Guix REPL has been started."))
|
||
(if guix-use-guile-server
|
||
(guix-start-repl-maybe 'internal)
|
||
(setq guix-internal-repl-buffer guix-repl-buffer)))
|
||
|
||
(defun guix-start-repl-maybe (&optional internal start-msg end-msg)
|
||
"Start Guix REPL if needed.
|
||
If INTERNAL is non-nil, start an internal REPL.
|
||
|
||
START-MSG and END-MSG are strings displayed in the minibuffer in
|
||
the beginning and in the end of the process. If nil, do not
|
||
display messages."
|
||
(let* ((repl-var (guix-get-repl-buffer-variable internal))
|
||
(repl (symbol-value repl-var)))
|
||
(unless (and (buffer-live-p repl)
|
||
(get-buffer-process repl))
|
||
(and start-msg (message start-msg))
|
||
(setq guix-repl-operation-p nil)
|
||
(unless internal
|
||
;; Guile leaves socket file after exit, so remove it if it
|
||
;; exists (after the REPL restart).
|
||
(guix-repl-delete-socket-maybe)
|
||
(setq guix-repl-current-socket
|
||
(and guix-use-guile-server
|
||
(or guix-repl-current-socket
|
||
(funcall guix-repl-socket-file-name-function)))))
|
||
(let ((geiser-guile-binary (guix-get-guile-program
|
||
(unless internal
|
||
guix-repl-current-socket)))
|
||
(geiser-guile-init-file (unless internal guix-helper-file))
|
||
(repl (get-buffer-create
|
||
(guix-get-repl-buffer-name internal))))
|
||
(guix-start-repl repl (and internal guix-repl-current-socket))
|
||
(set repl-var repl)
|
||
(and end-msg (message end-msg))
|
||
(unless internal
|
||
(run-hooks 'guix-after-start-repl-hook))))))
|
||
|
||
(defun guix-start-repl (buffer &optional address)
|
||
"Start Guix REPL in BUFFER.
|
||
If ADDRESS is non-nil, connect to a remote guile process using
|
||
this address (it should be defined by
|
||
`geiser-repl--read-address')."
|
||
;; A mix of the code from `geiser-repl--start-repl' and
|
||
;; `geiser-repl--to-repl-buffer'.
|
||
(let ((impl 'guile)
|
||
(geiser-guile-load-path (cons (expand-file-name guix-load-path)
|
||
geiser-guile-load-path))
|
||
(geiser-repl-startup-time guix-repl-startup-time))
|
||
(with-current-buffer buffer
|
||
(geiser-repl-mode)
|
||
(geiser-impl--set-buffer-implementation impl)
|
||
(geiser-repl--autodoc-mode -1)
|
||
(goto-char (point-max))
|
||
(let ((prompt (geiser-con--combined-prompt
|
||
geiser-guile--prompt-regexp
|
||
geiser-guile--debugger-prompt-regexp)))
|
||
(geiser-repl--save-remote-data address)
|
||
(geiser-repl--start-scheme impl address prompt)
|
||
(geiser-repl--quit-setup)
|
||
(geiser-repl--history-setup)
|
||
(setq-local geiser-repl--repls (list buffer))
|
||
(geiser-repl--set-this-buffer-repl buffer)
|
||
(setq geiser-repl--connection
|
||
(geiser-con--make-connection
|
||
(get-buffer-process (current-buffer))
|
||
geiser-guile--prompt-regexp
|
||
geiser-guile--debugger-prompt-regexp))
|
||
(geiser-repl--startup impl address)
|
||
(geiser-repl--autodoc-mode 1)
|
||
(geiser-company--setup geiser-repl-company-p)
|
||
(add-hook 'comint-output-filter-functions
|
||
'guix-repl-output-filter
|
||
nil t)
|
||
(set-process-query-on-exit-flag
|
||
(get-buffer-process (current-buffer))
|
||
geiser-repl-query-on-kill-p)))))
|
||
|
||
(defun guix-repl-output-filter (str)
|
||
"Filter function suitable for `comint-output-filter-functions'.
|
||
This is a replacement for `geiser-repl--output-filter'."
|
||
(cond
|
||
((string-match-p geiser-guile--prompt-regexp str)
|
||
(geiser-autodoc--disinhibit-autodoc)
|
||
(when guix-repl-operation-p
|
||
(setq guix-repl-operation-p nil)
|
||
(run-hooks 'guix-after-repl-operation-hook)
|
||
;; Run hooks specific to the current operation type.
|
||
(when guix-repl-operation-type
|
||
(let ((type-hook (intern
|
||
(concat "guix-after-"
|
||
(symbol-name guix-repl-operation-type)
|
||
"-hook"))))
|
||
(setq guix-repl-operation-type nil)
|
||
(and (boundp type-hook)
|
||
(run-hooks type-hook))))))
|
||
((string-match geiser-guile--debugger-prompt-regexp str)
|
||
(setq guix-repl-operation-p nil)
|
||
(geiser-con--connection-set-debugging geiser-repl--connection
|
||
(match-beginning 0))
|
||
(geiser-autodoc--disinhibit-autodoc))))
|
||
|
||
(defun guix-repl-exit (&optional internal no-wait)
|
||
"Exit the current Guix REPL.
|
||
If INTERNAL is non-nil, exit the internal REPL.
|
||
If NO-WAIT is non-nil, do not wait for the REPL process to exit:
|
||
send a kill signal to it and return immediately."
|
||
(let ((repl (symbol-value (guix-get-repl-buffer-variable internal))))
|
||
(when (get-buffer-process repl)
|
||
(with-current-buffer repl
|
||
(geiser-con--connection-deactivate geiser-repl--connection t)
|
||
(comint-kill-subjob)
|
||
(unless no-wait
|
||
(while (get-buffer-process repl)
|
||
(sleep-for 0.1)))))))
|
||
|
||
(defun guix-get-repl-buffer (&optional internal)
|
||
"Return Guix REPL buffer; start REPL if needed.
|
||
If INTERNAL is non-nil, return an additional internal REPL."
|
||
(guix-start-process-maybe)
|
||
(let ((repl (symbol-value (guix-get-repl-buffer-variable internal))))
|
||
;; If a new Geiser REPL is started, `geiser-repl--repl' variable may
|
||
;; be set to the new value in a Guix REPL, so set it back to a
|
||
;; proper value here.
|
||
(with-current-buffer repl
|
||
(geiser-repl--set-this-buffer-repl repl))
|
||
repl))
|
||
|
||
(defun guix-get-repl-buffer-variable (&optional internal)
|
||
"Return the name of a variable with a REPL buffer."
|
||
(if internal
|
||
'guix-internal-repl-buffer
|
||
'guix-repl-buffer))
|
||
|
||
(defun guix-get-repl-buffer-name (&optional internal)
|
||
"Return the name of a REPL buffer."
|
||
(if internal
|
||
guix-internal-repl-buffer-name
|
||
guix-repl-buffer-name))
|
||
|
||
(defun guix-switch-to-repl (&optional internal)
|
||
"Switch to Guix REPL.
|
||
If INTERNAL is non-nil (interactively with prefix), switch to the
|
||
additional internal REPL if it exists."
|
||
(interactive "P")
|
||
(geiser-repl--switch-to-buffer (guix-get-repl-buffer internal)))
|
||
|
||
|
||
;;; Guix directory
|
||
|
||
(defvar guix-directory nil
|
||
"Default directory with Guix source.
|
||
If it is not set by a user, it is set after starting Guile REPL.
|
||
This directory is used to define package locations.")
|
||
|
||
(defun guix-read-directory ()
|
||
"Return `guix-directory' or prompt for it.
|
||
This function is intended for using in `interactive' forms."
|
||
(if current-prefix-arg
|
||
(read-directory-name "Directory with Guix modules: "
|
||
guix-directory)
|
||
guix-directory))
|
||
|
||
(defun guix-set-directory ()
|
||
"Set `guix-directory' if needed."
|
||
(or guix-directory
|
||
(setq guix-directory
|
||
(guix-eval-read "%guix-dir"))))
|
||
|
||
|
||
;;; Evaluating expressions
|
||
|
||
(defvar guix-operation-buffer nil
|
||
"Buffer from which the latest Guix operation was performed.")
|
||
|
||
(defun guix-eval (str)
|
||
"Evaluate STR with guile expression using Guix REPL.
|
||
See `guix-geiser-eval' for details."
|
||
(guix-geiser-eval str (guix-get-repl-buffer 'internal)))
|
||
|
||
(defun guix-eval-read (str)
|
||
"Evaluate STR with guile expression using Guix REPL.
|
||
See `guix-geiser-eval-read' for details."
|
||
(guix-geiser-eval-read str (guix-get-repl-buffer 'internal)))
|
||
|
||
(defun guix-eval-in-repl (str &optional operation-buffer operation-type)
|
||
"Switch to Guix REPL and evaluate STR with guile expression there.
|
||
If OPERATION-BUFFER is non-nil, it should be a buffer from which
|
||
the current operation was performed.
|
||
|
||
If OPERATION-TYPE is non-nil, it should be a symbol. After
|
||
successful executing of the current operation,
|
||
`guix-after-OPERATION-TYPE-hook' is called."
|
||
(run-hooks 'guix-before-repl-operation-hook)
|
||
(setq guix-repl-operation-p t
|
||
guix-repl-operation-type operation-type
|
||
guix-operation-buffer operation-buffer)
|
||
(guix-geiser-eval-in-repl str (guix-get-repl-buffer)))
|
||
|
||
(provide 'guix-backend)
|
||
|
||
;;; guix-backend.el ends here
|