119 lines
3.8 KiB
EmacsLisp
119 lines
3.8 KiB
EmacsLisp
;;; ein-log.el --- Logging module for ein.el
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;; Copyright (C) 2012- Takafumi Arakaki
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;; Author: Takafumi Arakaki <aka.tkf at gmail.com>
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;; This file is NOT part of GNU Emacs.
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;; ein-log.el is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; ein-log.el is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with ein-log.el. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;;
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;;; Code:
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(require 'ein-core)
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(defvar ein:log-all-buffer-name "*ein:log-all*")
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(defvar ein:log-level-def
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'(;; debugging
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(blather . 60) (trace . 50) (debug . 40)
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;; information
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(verbose . 30) (info . 20)
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;; errors
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(warn . 10) (error . 0))
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"Named logging levels.")
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;; Some names are stolen from supervisord (http://supervisord.org/logging.html)
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(defvar ein:log-level 30)
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(defvar ein:log-message-level 20)
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(defvar ein:log-print-length 10 "`print-length' for `ein:log'")
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(defvar ein:log-print-level 1 "`print-level' for `ein:log'")
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(defvar ein:log-max-string 1000)
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(defun ein:log-set-level (level)
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(setq ein:log-level (ein:log-level-name-to-int level)))
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(defun ein:log-set-message-level (level)
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(setq ein:log-message-level (ein:log-level-name-to-int level)))
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(defun ein:log-level-int-to-name (int)
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(cl-loop for (n . i) in ein:log-level-def
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when (>= int i)
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return n
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finally 'error))
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(defun ein:log-level-name-to-int (name)
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(cdr (assq name ein:log-level-def)))
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(defsubst ein:log-strip-timestamp (msg)
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(replace-regexp-in-string "^[0-9: ]+" "" msg))
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(defun ein:log-wrapper (level func)
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(setq level (ein:log-level-name-to-int level))
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(when (<= level ein:log-level)
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(let* ((levname (ein:log-level-int-to-name level))
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(print-level ein:log-print-level)
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(print-length ein:log-print-length)
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(msg (format "%s: [%s] %s" (format-time-string "%H:%M:%S:%3N") levname (funcall func)))
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(orig-buffer (current-buffer)))
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(if (and ein:log-max-string
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(> (length msg) ein:log-max-string))
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(setq msg (substring msg 0 ein:log-max-string)))
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(ein:with-read-only-buffer (get-buffer-create ein:log-all-buffer-name)
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(goto-char (point-max))
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(insert msg (format " @%S" orig-buffer) "\n"))
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(when (<= level ein:log-message-level)
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(message "ein: %s" (ein:log-strip-timestamp msg))))))
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(defmacro ein:log (level string &rest args)
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(declare (indent 1))
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`(ein:log-wrapper ,level (lambda () (format ,string ,@args))))
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;; FIXME: this variable must go to somewhere more central
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(defvar ein:debug nil
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"Set to non-`nil' to raise errors instead of suppressing it.
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Change the behavior of `ein:log-ignore-errors'.")
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(defmacro ein:log-ignore-errors (&rest body)
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"Execute BODY; if an error occurs, log the error and return nil.
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Otherwise, return result of last form in BODY."
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(declare (debug t) (indent 0))
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`(if ein:debug
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(progn ,@body)
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(condition-case err
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(progn ,@body)
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(error
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(ein:log 'debug "Error: %S" err)
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(ein:log 'error (error-message-string err))
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nil))))
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(defun ein:log-pop-to-request-buffer ()
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(interactive)
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(aif (get-buffer request-log-buffer-name)
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(pop-to-buffer it)
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(message "No buffer named \"%s\"" request-log-buffer-name)))
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(defun ein:log-pop-to-all-buffer ()
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(interactive)
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(pop-to-buffer (get-buffer-create ein:log-all-buffer-name)))
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(provide 'ein-log)
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;;; ein-log.el ends here
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