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emacs: Add hooks for REPL operations. 

* emacs/guix-backend.el (guix-before-repl-operation-hook,
  guix-after-repl-operation-hook, guix-repl-operation-p): New variables.
  (guix-repl-operation-success-message, guix-repl-output-filter): New
  procedures.
  (guix-start-repl): Adjust for using 'guix-repl-output-filter'.
  (guix-eval-in-repl): Honor 'guix-before-repl-operation-hook'.
This commit is contained in:
Alex Kost 2014-10-13 21:49:31 +04:00
parent dd7c013d4b
commit 063b60be7b
1 changed files with 38 additions and 9 deletions
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47
emacs/guix-backend.el
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@ -121,6 +121,22 @@ This REPL is used for receiving information only if
(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-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.")
(defun guix-repl-operation-success-message ()
"Message telling about successful Guix operation."
(message "Guix operation has been performed."))
(defun guix-get-guile-program (&optional internal)
"Return a value suitable for `geiser-guile-binary'."
(if (or internal
@ -184,12 +200,9 @@ this address (it should be defined by
(geiser-impl--set-buffer-implementation impl)
(geiser-repl--autodoc-mode -1)
(goto-char (point-max))
(let* ((prompt-re (geiser-repl--prompt-regexp impl))
(deb-prompt-re (geiser-repl--debugger-prompt-regexp impl))
(prompt (geiser-con--combined-prompt prompt-re deb-prompt-re)))
(or prompt-re
(error "Oh no! Guix REPL in the buffer '%s' has not been started"
(buffer-name buffer)))
(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)
@ -199,18 +212,32 @@ this address (it should be defined by
(setq geiser-repl--connection
(geiser-con--make-connection
(get-buffer-process (current-buffer))
prompt-re
deb-prompt-re))
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
'geiser-repl--output-filter
'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)))
((string-match geiser-guile--debugger-prompt-regexp str)
(geiser-con--connection-set-debugging geiser-repl--connection
(match-beginning 0))
(geiser-autodoc--disinhibit-autodoc))))
(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."
@ -288,6 +315,8 @@ Return elisp expression of the first result value of evaluation."
(defun guix-eval-in-repl (str)
"Switch to Guix REPL and evaluate STR with guile expression there."
(run-hooks 'guix-before-repl-operation-hook)
(setq guix-repl-operation-p t)
(let ((repl (guix-get-repl-buffer)))
(with-current-buffer repl
(delete-region (geiser-repl--last-prompt-end) (point-max))