blob: dd4081baae1506942bada1ef8de0759d04b7b089 (
plain)
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
|
;;; el-exiftool.el --- Elisp wrapper around exiftool ;; -*- lexical-binding: t -*-
;; Elisp wrapper around exiftool
;; Copyright (C) 2017 by Arun I
;;
;; Author: Arun I <arunisaac@systemreboot.net>
;; Keywords: data
;; Homepage: https://git.systemreboot.net/el-exiftool
;; This file is part of el-exiftool.
;; el-exiftool 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.
;; el-exiftool 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 el-exiftool. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;
;; el-exiftool is an elisp wrapper around exiftool. Exiftool supports
;; reading and writing metadata in various formats including EXIF, XMP
;; and IPTC.
;;; Code:
(require 'subr-x)
(require 'cl)
(defun el-exiftool--tq-sync-query (tq question regexp &optional closure)
(let ((response))
(tq-enqueue tq question regexp closure
(lambda (closure answer) (setq response answer)))
(while (not response)
(accept-process-output))
response))
(defun el-exiftool-run ()
"Start an exiftool process if one is not already running.
If an exiftool process is already running, delete it, and create
a new one. Return the process object of the newly created
process."
(when-let (exiftool (get-process "exiftool"))
(delete-process exiftool))
(start-process "exiftool" "exiftool" "exiftool" "-stay_open" "True" "-@" "-"))
(let ((tq (tq-create (el-exiftool-run))))
(defun el-exiftool-command (&rest args)
"Execute a command in the currently running exiftool process.
If there is no running exiftool process, a new one will be
created. ARGS are arguments of the command to be run, as provided
to the exiftool command line application."
(string-trim
(let ((suffix "{ready}\n"))
(string-remove-suffix
suffix (el-exiftool--tq-sync-query
tq (concat (string-join args "\n")
"\n-execute\n")
suffix))))))
(defun el-exiftool-read (file &rest tags)
"Read TAGs from FILE, and return an alist mapping tag names to corresponding values.
\(fn FILE TAG...)"
(mapcar
(lambda (line)
(apply 'cons (split-string line ": ")))
(split-string
(apply 'el-exiftool-command
"-s" "-s"
(append
(mapcar (apply-partially 'format "-%s") tags)
(list file)))
"\n+")))
(defun el-exiftool-copy (source destination)
"Copy tags from SOURCE file to DESTINATION file."
(el-exiftool-command "-overwrite_original"
"-tagsFromFile" source
"-all:all" destination)
(message "Tags from %s copied to %s" source destination)
destination)
(defun el-exiftool-write (file &rest tag-value-alist)
"Write tags to FILE.
The metadata to be written is specified as (TAG . VALUE) pairs.
\(fn FILE (TAG . VALUE)...)"
(apply 'el-exiftool-command
"-m" "-overwrite_original"
(append
(mapcar
(cl-function
(lambda ((tag . value))
(format "-%s=%s" tag value)))
tag-value-alist)
(list file))))
(provide 'el-exiftool)
;;; el-exiftool.el ends here
|
