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;;; -*- lexical-binding: t -*-
(defcustom grid-engine-map nil
"Keymap for Grid Engine mode.")
(defcustom grid-engine-host nil
"The host on which Grid Engine is running. Defaults to localhost.")
(defcustom grid-engine-qstat "/opt/sge/bin/lx-amd64/qstat"
"The full path to the qstat executable.")
(defcustom grid-engine-user nil
"The grid engine user. Defaults to the logged in user's name.")
(defun grid-engine-setup ()
(if grid-engine-map
nil
(setq grid-engine-map (make-keymap))
;; disable all key bindings
(suppress-keymap grid-engine-map)
(define-key grid-engine-map (kbd "n") 'next-logical-line)
(define-key grid-engine-map (kbd "p") 'previous-logical-line)
(define-key grid-engine-map (kbd "q") 'bury-buffer)
(define-key grid-engine-map (kbd "<RET>")
(lambda (&optional arg)
(interactive)
(grid-engine-job-details (thing-at-point 'word) arg)))
(define-key grid-engine-map (kbd "g")
(lambda () (interactive) (grid-engine-list-jobs)))))
(defun grid-engine--raise-buffer (&optional buffer)
(when buffer
(set-buffer buffer))
(goto-char (point-min))
(pop-to-buffer-same-window (current-buffer))
(grid-engine))
(defun grid-engine--split-buffer (&optional buffer)
(when buffer
(set-buffer buffer))
(goto-char (point-min))
(display-buffer (current-buffer))
(grid-engine))
(defun grid-engine--default-directory ()
(if grid-engine-host
(concat "/ssh:" grid-engine-host ":")
default-directory))
(defun grid-engine--cmd-to-buffer (cmd &optional buffer-name)
"Run a command CMD on the Grid Engine host and write output to BUFFER-NAME. If BUFFER-NAME is nil, write to current buffer."
(let ((default-directory (grid-engine--default-directory)))
(when buffer-name
(set-buffer (get-buffer-create buffer-name))
(erase-buffer))
(process-file-shell-command cmd nil (current-buffer) t)))
(defun grid-engine--cmd-to-xmltree (cmd)
"Run a command CMD on the Grid Engine host and return output as list of strings."
(with-temp-buffer
(grid-engine--cmd-to-buffer cmd)
(libxml-parse-xml-region 1 (buffer-size))))
(defun grid-engine-list-jobs ()
"List all jobs for the specified user in a new buffer."
(setq row-pattern "%-10s %-10s %-15s %-10s\n")
(setq header (format (concat row-pattern " \n")
"Job-ID"
"Priority"
"User"
"State"))
(defun format-job-record (job)
(format row-pattern
(cdr (assoc 'job-id job))
(cdr (assoc 'priority job))
(cdr (assoc 'owner job))
(cdr (assoc 'state job))))
(defun mkjob-alist (subtree)
"Convert a parsed XML subtree for a job entry to an alist."
(cl-reduce
(lambda (acc field)
(let ((name (case (car field)
('JB_job_number 'job-id)
('JAT_prio 'priority)
('JB_name 'name)
('JB_owner 'owner)
('state 'state)
('JAT_start_time 'time)
('queue_name 'queue)
('slots 'slots)
(t nil))))
(if name
(cons (cons name (caddr field)) acc)
acc)))
(cdr subtree) :initial-value nil))
(let* ((user (if grid-engine-user grid-engine-user
(user-login-name)))
(cmd (concat grid-engine-qstat " -xml -u " user))
(title "*grid-engine-jobs*"))
(message "[Grid Engine] fetching list of jobs for %s ..." user)
(let* ((tree (grid-engine--cmd-to-xmltree cmd))
(jobs (mapcar 'mkjob-alist (cddr (caddr tree)))))
(set-buffer (get-buffer-create title))
(erase-buffer)
(insert header)
(mapcar (lambda (job)
(insert (format-job-record job)))
jobs))
(grid-engine--raise-buffer)
(message nil)))
(defun grid-engine-job-details (job-id &optional new-buffer)
; (unless (number-or-marker-p job-id)
; (error "[Grid Engine] %s is not a valid job id."))
(let ((cmd (concat grid-engine-qstat " -j " job-id))
(title (if new-buffer
(concat "*grid-engine-job-details-" job-id "*")
"*grid-engine-job-details*")))
(message "[Grid Engine] fetching details for job %s" job-id)
(grid-engine--cmd-to-buffer cmd title)
(grid-engine--split-buffer)))
(defun grid-engine ()
"Major mode for interacting with Grid Engine."
(interactive)
(kill-all-local-variables)
(setq major-mode 'grid-engine)
(setq mode-name "Grid Engine")
(grid-engine-setup)
(use-local-map grid-engine-map)
(run-hooks 'grid-engine-hook))
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