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;;; cider-tracing.el --- Executing tracing functionality -*- lexical-binding: t -*-
;; Copyright © 2013-2018 Bozhidar Batsov, Artur Malabarba and CIDER contributors
;;
;; Author: Bozhidar Batsov <bozhidar@batsov.com>
;; Artur Malabarba <bruce.connor.am@gmail.com>
;; This program 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.
;; This program 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/>.
;; This file is not part of GNU Emacs.
;;; Commentary:
;; A couple of commands for tracing the execution of functions.
;;; Code:
(require 'cider-client)
(require 'cider-common) ; for `cider-prompt-for-symbol-function'
(require 'cider-util) ; for `cider-propertize'
(require 'cider-connection) ; for `cider-map-repls'
(require 'nrepl-dict)
(defun cider-sync-request:toggle-trace-var (symbol)
"Toggle var tracing for SYMBOL."
(thread-first `("op" "toggle-trace-var"
"ns" ,(cider-current-ns)
"sym" ,symbol)
(cider-nrepl-send-sync-request)))
(defun cider--toggle-trace-var (sym)
"Toggle var tracing for SYM."
(let* ((trace-response (cider-sync-request:toggle-trace-var sym))
(var-name (nrepl-dict-get trace-response "var-name"))
(var-status (nrepl-dict-get trace-response "var-status")))
(pcase var-status
("not-found" (error "Var %s not found" (cider-propertize sym 'fn)))
("not-traceable" (error "Var %s can't be traced because it's not bound to a function" (cider-propertize var-name 'fn)))
(_ (message "Var %s %s" (cider-propertize var-name 'fn) var-status)))))
;;;###autoload
(defun cider-toggle-trace-var (arg)
"Toggle var tracing.
Prompts for the symbol to use, or uses the symbol at point, depending on
the value of `cider-prompt-for-symbol'. With prefix arg ARG, does the
opposite of what that option dictates."
(interactive "P")
(cider-ensure-op-supported "toggle-trace-var")
(funcall (cider-prompt-for-symbol-function arg)
"Toggle trace for var"
#'cider--toggle-trace-var))
(defun cider-sync-request:toggle-trace-ns (ns)
"Toggle namespace tracing for NS."
(thread-first `("op" "toggle-trace-ns"
"ns" ,ns)
(cider-nrepl-send-sync-request)))
;;;###autoload
(defun cider-toggle-trace-ns (query)
"Toggle ns tracing.
Defaults to the current ns. With prefix arg QUERY, prompts for a ns."
(interactive "P")
(cider-map-repls :clj-strict
(lambda (conn)
(with-current-buffer conn
(cider-ensure-op-supported "toggle-trace-ns")
(let ((ns (if query
(completing-read "Toggle trace for ns: "
(cider-sync-request:ns-list))
(cider-current-ns))))
(let* ((trace-response (cider-sync-request:toggle-trace-ns ns))
(ns-status (nrepl-dict-get trace-response "ns-status")))
(pcase ns-status
("not-found" (error "Namespace %s not found" (cider-propertize ns 'ns)))
(_ (message "Namespace %s %s" (cider-propertize ns 'ns) ns-status)))))))))
(provide 'cider-tracing)
;;; cider-tracing.el ends here
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