unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
blob ba1b81ef7e25a971638ad4466a77aa3bc88392b1 7952 bytes (raw)
name: lisp/sqlite-mode.el 	 # note: path name is non-authoritative(*)

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
 
;;; sqlite-mode.el --- Mode for examining sqlite3 database files  -*- lexical-binding: t; -*-

;; Copyright (C) 2021-2022 Free Software Foundation, Inc.

;; This file is part of GNU Emacs.

;; GNU Emacs 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.

;; GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;;

;;; Code:

(require 'cl-lib)

(declare-function sqlite-execute "sqlite.c")
(declare-function sqlite-more-p "sqlite.c")
(declare-function sqlite-next "sqlite.c")
(declare-function sqlite-columns "sqlite.c")
(declare-function sqlite-finalize "sqlite.c")
(declare-function sqlite-select "sqlite.c")
(declare-function sqlite-open "sqlite.c")

(defvar-keymap sqlite-mode-map
  "g" #'sqlite-mode-list-tables
  "c" #'sqlite-mode-list-columns
  "RET" #'sqlite-mode-list-data
  "DEL" #'sqlite-mode-delete)

(define-derived-mode sqlite-mode special-mode "Sqlite"
  "This mode lists the contents of an .sqlite3 file"
  :interactive nil
  (buffer-disable-undo)
  (setq-local buffer-read-only t
              truncate-lines t))

(defvar sqlite--db nil)

;;;###autoload
(defun sqlite-mode-open-file (file)
  "Browse the contents of an sqlite file."
  (interactive "fSQLite file name: ")
  (unless (sqlite-available-p)
    (error "This Emacs doesn't have SQLite support, so it can't view SQLite files"))
  (pop-to-buffer (get-buffer-create
                  (format "*SQLite %s*" (file-name-nondirectory file))))
  (sqlite-mode)
  (setq-local sqlite--db (sqlite-open file))
  (sqlite-mode-list-tables))

(defun sqlite-mode-list-tables ()
  "Re-list the tables from the currently selected database."
  (interactive nil sqlite-mode)
  (let ((inhibit-read-only t)
        (db sqlite--db)
        (entries nil))
    (erase-buffer)
    (dolist (table (sqlite-select db "select name from sqlite_master where type = 'table' and name not like 'sqlite_%' order by name"))
      (push (list (car table)
                  (caar (sqlite-select db (format "select count(*) from %s"
                                                  (car table)))))
            entries))
    (sqlite-mode--tablify '("Table Name" "Number of Rows")
                          (nreverse entries)
                          'table)
    (goto-char (point-min))))

(defun sqlite-mode--tablify (columns rows type &optional prefix)
  (let ((widths
         (mapcar
          (lambda (i)
            (1+ (seq-max (mapcar (lambda (row)
                                   (length (format "%s" (nth i row))))
                                 (cons columns rows)))))
          (number-sequence 0 (1- (length columns))))))
    (when prefix
      (insert prefix))
    (dotimes (i (length widths))
      (insert (propertize (format (format "%%-%ds " (nth i widths))
                                  (nth i columns))
                          'face 'header-line)))
    (insert "\n")
    (dolist (row rows)
      (let ((start (point)))
        (when prefix
          (insert prefix))
        (dotimes (i (length widths))
          (let ((elem (nth i row)))
            (insert (format (format "%%%s%ds "
                                    (if (numberp elem)
                                        "" "-")
                                    (nth i widths))
                            (if (numberp elem)
                                (nth i row)
                              (string-replace "\n" " " (or elem "")))))))
        (put-text-property start (point) 'sqlite--row row)
        (put-text-property start (point) 'sqlite--type type)
        (insert "\n")))))

(defun sqlite-mode-list-columns ()
  "List the columns of the table under point."
  (interactive nil sqlite-mode)
  (let ((row (get-text-property (point) 'sqlite--row)))
    (unless row
      (user-error "No table under point"))
    (let ((columns (sqlite-mode--column-names (car row)))
          (inhibit-read-only t))
      (save-excursion
        (forward-line 1)
        (if (looking-at " ")
            ;; Delete the info.
            (delete-region (point) (if (re-search-forward "^[^ ]" nil t)
                                       (match-beginning 0)
                                     (point-max)))
          ;; Insert the info.
          (dolist (column columns)
            (insert (format "  %s\n" column))))))))

(defun sqlite-mode--column-names (table)
  (let ((sql
         (caar
          (sqlite-select
           sqlite--db
           "select sql from sqlite_master where tbl_name = ? AND type = 'table'"
           (list table)))))
    (mapcar
     #'string-trim
     (split-string (replace-regexp-in-string "^.*(\\|)$" "" sql) ","))))

(defun sqlite-mode-list-data ()
  "List the data from the table under point."
  (interactive nil sqlite-mode)
  (let ((row (and (eq (get-text-property (point) 'sqlite--type) 'table)
                  (get-text-property (point) 'sqlite--row))))
    (unless row
      (user-error "No table under point"))
    (let ((inhibit-read-only t))
      (save-excursion
        (forward-line 1)
        (if (looking-at " ")
            ;; Delete the info.
            (delete-region (point) (if (re-search-forward "^[^ ]" nil t)
                                       (match-beginning 0)
                                     (point-max)))
          (sqlite--mode--list-data (list (car row) 0)))))))

(defun sqlite-mode--more-data (stmt)
  (let ((inhibit-read-only t))
    (beginning-of-line)
    (delete-region (point) (progn (forward-line 1) (point)))
    (sqlite--mode--list-data stmt)))

(defun sqlite--mode--list-data (data)
  (let* ((table (car data))
         (rowid (cadr data))
         stmt)
    (unwind-protect
        (progn
          (setq stmt
                (sqlite-select
                 sqlite--db
                 (format "select rowid, * from %s where rowid >= ?" table)
                 (list rowid)
                 'set))
          (sqlite-mode--tablify (sqlite-columns stmt)
                                (cl-loop for i from 0 upto 1000
                                         for row = (sqlite-next stmt)
                                         while row
                                         do (setq rowid (car row))
                                         collect row)
                                (cons 'row table)
                                "  ")
          (when (sqlite-more-p stmt)
            (insert (buttonize "  More data...\n" #'sqlite-mode--more-data
                               (list table rowid)))))
      (when stmt
        (sqlite-finalize stmt)))))

(defun sqlite-mode-delete ()
  "Delete the row under point."
  (interactive nil sqlite-mode)
  (let ((table (get-text-property (point) 'sqlite--type))
        (row (get-text-property (point) 'sqlite--row))
        (inhibit-read-only t))
    (when (or (not (consp table))
              (not (eq (car table) 'row)))
      (user-error "No row under point"))
    (unless (yes-or-no-p "Really delete the row under point? ")
      (user-error "Not deleting"))
    (sqlite-execute
     sqlite--db
     (format "delete from %s where %s"
             (cdr table)
             (string-join
              (mapcar (lambda (column)
                        (format "%s = ?" (car (split-string column " "))))
                      (cons "rowid" (sqlite-mode--column-names (cdr table))))
              " and "))
     row)
    (delete-region (line-beginning-position) (progn (forward-line 1) (point)))))

(provide 'sqlite-mode)

;;; sqlite-mode.el ends here

debug log:

solving ba1b81ef7e2 ...
found ba1b81ef7e2 in https://git.savannah.gnu.org/cgit/emacs.git

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).