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|
;;; grab.el --- Emacs integration for grab -*- lexical-binding: t; -*-
;; Author: Thomas Voss <mail@thomasvoss.com>
;; Description: TODO
;; Keywords: matching, tools
;;; Commentary:
;; TODO
;;; Code:
(require 'ansi-color)
(require 'compile)
(require 'project)
(defgroup grab nil
"Settings for `grab'."
:group 'tools)
(defcustom grab-command "grab"
"The base executable for the grab tool."
:type 'string)
(defcustom git-grab-command "git-grab"
"The base executable for the git-grab tool."
:type 'string)
(defcustom grab-command-arguments '("-c" "-Halways")
"TODO"
:type '(repeat string))
(defcustom git-grab-command-arguments grab-command-arguments
"TODO"
:type '(repeat string))
(defcustom grab-default-pattern '("x// h//" . 3)
"TODO"
:type '(choice (cons string natnum)
(string)))
(defvar grab--header-regexp
"^\\([^:\n]+\\):\\([0-9]+\\):")
(defvar grab-results-mode-map
(let ((map (make-sparse-keymap)))
(keymap-set map "RET" #'grab-goto-match)
(keymap-set map "n" #'grab-next-match)
(keymap-set map "p" #'grab-prev-match)
map)
"Keymap for navigating grab matches.")
(define-derived-mode grab-results-mode compilation-mode "Grab"
"TODO"
(setq-local compilation-error-regexp-alist nil
compilation-error-regexp-alist-alist nil
next-error-function #'grab-next-error)
(add-hook 'compilation-filter-hook #'ansi-color-compilation-filter nil :local)
(font-lock-add-keywords nil
`((,grab--header-regexp
(1 'compilation-info)
(2 'compilation-line-number)))))
^L
;;; Process Management
(defun grab--run-process (command-args buffer-name)
(let ((cmd-string (mapconcat #'shell-quote-argument command-args " ")))
(compilation-start cmd-string
#'grab-results-mode
(lambda (_) buffer-name))))
^L
;;; Navigation & Core Logic
(defun grab--valid-match-p ()
"Return non-nil if the current line is a match."
(save-excursion
(beginning-of-line)
(and (looking-at grab--header-regexp)
(not (string-prefix-p "Grab started" (match-string 1)))
(not (string-prefix-p "Grab finished" (match-string 1))))))
(defun grab-display-match (&optional select-window-p)
"Parse current line and display the match in the source buffer."
(interactive "P")
(save-excursion
(beginning-of-line)
(if (grab--valid-match-p)
(let* ((file (match-string-no-properties 1))
(offset (string-to-number (match-string-no-properties 2)))
(full-path (expand-file-name file default-directory)))
(if (not (file-exists-p full-path))
(error "File `%s' does not exist" full-path)
(let* ((buffer (find-file-noselect full-path))
(window (display-buffer
buffer '(display-buffer-reuse-window
display-buffer-pop-up-window))))
(with-selected-window window
(let ((pos (or (byte-to-position (1+ offset)) (1+ offset))))
(goto-char pos)
(when (fboundp 'pulse-momentary-highlight-one-line)
(pulse-momentary-highlight-one-line pos))))
(when select-window-p
(select-window window)))))
(user-error "No match found on the current line"))))
(defun grab-goto-match ()
"Go to match on current line and select its window."
(interactive)
(grab-display-match :select-window-p))
(defun grab--search-forward ()
(catch 'found
(while (re-search-forward grab--header-regexp nil :noerror)
(when (grab--valid-match-p)
(throw 'found t)))
nil))
(defun grab--search-backward ()
(catch 'found
(while (re-search-backward grab--header-regexp nil :noerror)
(when (grab--valid-match-p)
(throw 'found t)))
nil))
(defun grab-next-match ()
"Move to the next match and display it."
(interactive)
(forward-line 1)
(if (grab--search-forward)
(progn
(beginning-of-line)
(grab-display-match))
(forward-line -1)
(message "No more matches")))
(defun grab-prev-match ()
"Move to the previous match and display it."
(interactive)
(forward-line -1)
(if (grab--search-backward)
(progn
(beginning-of-line)
(grab-display-match))
(forward-line 1)
(message "No previous matches")))
(defun grab-next-error (&optional arg reset)
"TODO"
(interactive "p")
(when reset
(goto-char (point-min)))
(let ((direction (if (< arg 0) -1 +1))
(count (abs arg)))
(dotimes (_ count)
(if (> direction 0)
(progn
(end-of-line)
(unless (grab--search-forward)
(error "No more matches")))
(beginning-of-line)
(unless (grab--search-backward)
(error "No previous matches"))))
(beginning-of-line)
(grab-goto-match)))
^L
;;; Interactive Commands
;;;###autoload
(defun grab (pattern)
"Run grab with PATTERN in the current directory."
(interactive
(list (read-string (format-prompt "Grab Pattern" nil) grab-default-pattern)))
(grab--run-process
(flatten-tree (list grab-command grab-command-arguments pattern))
"*grab*"))
;;;###autoload
(defun git-grab (pattern)
"Run git grab with PATTERN in the current directory."
(interactive
(list (read-string (format-prompt "Grab Pattern" nil) grab-default-pattern)))
(grab--run-process
(flatten-tree (list git-grab-command git-grab-command-arguments pattern))
"*grab*"))
;;;###autoload
(defun project-grab (pattern)
"Run grab with PATTERN at the project root."
(interactive
(list (read-string (format-prompt "Grab Pattern" nil) grab-default-pattern)))
(let* ((project (project-current t))
(default-directory (project-root project)))
(grab--run-process
(flatten-tree (list grab-command grab-command-arguments pattern))
"*grab*")))
;;;###autoload
(defun project-git-grab (pattern)
"Run git grab with PATTERN at the project root."
(interactive
(list (read-string (format-prompt "Grab Pattern" nil) grab-default-pattern)))
(let* ((project (project-current t))
(default-directory (project-root project)))
(grab--run-process
(flatten-tree (list git-grab-command git-grab-command-arguments pattern))
"*grab*")))
(provide 'grab)
;;; grab.el ends here
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