1 /* json-glib-format - Formats JSON data
2 *
3 * This file is part of JSON-GLib
4 *
5 * Copyright © 2013 Emmanuele Bassi
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
19 *
20 * Author:
21 * Emmanuele Bassi <ebassi@gnome.org>
22 */
23
24 #include "config.h"
25
26 #ifdef G_OS_UNIX
27 #include <unistd.h>
28 #include <sys/types.h>
29 #include <sys/stat.h>
30 #endif
31 #include <fcntl.h>
32 #ifdef G_OS_WIN32
33 #include <windows.h>
34 #endif
35
36 #include <stdlib.h>
37 #include <stdio.h>
38 #include <locale.h>
39 #include <errno.h>
40
41 #include <glib.h>
42 #include <glib/gi18n.h>
43 #include <glib/gstdio.h>
44 #include <json-glib/json-glib.h>
45
46 #if defined (G_OS_WIN32) && !defined (HAVE_UNISTD_H)
47 #include <io.h>
48
49 #define STDOUT_FILENO 1
50 #endif
51
52 static char **files = NULL;
53 static char *output = NULL;
54 static gboolean prettify = FALSE;
55 static int indent_spaces = 2;
56
57 static GOptionEntry entries[] = {
58 { "prettify", 'p', 0, G_OPTION_ARG_NONE, &prettify, N_("Prettify output"), NULL },
59 { "indent-spaces", 'i', 0, G_OPTION_ARG_INT, &indent_spaces, N_("Indentation spaces"), N_("SPACES") },
60 { "output", 'o', 0, G_OPTION_ARG_FILENAME, &output, N_("Output file"), N_("FILE") },
61 { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &files, NULL, N_("FILE…") },
62 { NULL },
63 };
64
65 static gboolean
format(JsonParser * parser,JsonGenerator * generator,GFile * file)66 format (JsonParser *parser,
67 JsonGenerator *generator,
68 GFile *file)
69 {
70 GInputStream *in;
71 GError *error;
72 gboolean res = TRUE;
73 gboolean parse_res;
74 gboolean close_res;
75 char *data, *p;
76 gsize len;
77 int fd = -1;
78
79 error = NULL;
80
81 in = (GInputStream *) g_file_read (file, NULL, &error);
82 if (in == NULL)
83 {
84 /* Translators: the first %s is the program name, the second one
85 * is the URI of the file, the third is the error message.
86 */
87 g_printerr (_("%s: %s: error opening file: %s\n"),
88 g_get_prgname (), g_file_get_uri (file), error->message);
89 g_error_free (error);
90 return FALSE;
91 }
92
93 parse_res = json_parser_load_from_stream (parser, in, NULL, &error);
94 if (!parse_res)
95 {
96 char *uri = g_file_get_uri (file);
97
98 /* Translators: the first %s is the program name, the second one
99 * is the URI of the file, the third is the error message.
100 */
101 g_printerr (_("%s: %s: error parsing file: %s\n"),
102 g_get_prgname (), uri, error->message);
103 g_clear_error (&error);
104 g_free (uri);
105 res = FALSE;
106 goto out;
107 }
108
109 json_generator_set_root (generator, json_parser_get_root (parser));
110 data = json_generator_to_data (generator, &len);
111
112 if (output == NULL)
113 fd = STDOUT_FILENO;
114 else
115 {
116 int sv_errno;
117
118 fd = g_open (output, O_CREAT | O_WRONLY, 0666);
119 if (fd < 0)
120 {
121 sv_errno = errno;
122
123 g_printerr (_("%s: %s: error opening file: %s\n"),
124 g_get_prgname (), output, g_strerror (sv_errno));
125 res = FALSE;
126 goto out;
127 }
128 }
129
130 p = data;
131
132 while (len > 0)
133 {
134 gssize written = write (fd, p, len);
135
136 if (written == -1 && errno != EINTR)
137 {
138 char *uri = g_file_get_uri (file);
139
140 /* Translators: the first %s is the program name, the
141 * second one is the URI of the file.
142 */
143 g_printerr (_("%s: %s: error writing to stdout"), g_get_prgname (), uri);
144 g_free (uri);
145 res = FALSE;
146 goto out;
147 }
148
149 len -= written;
150 p += written;
151 }
152
153 if (write (fd, "\n", 1) < 0)
154 g_error ("%s: %s", g_get_prgname (), g_strerror (errno));
155
156 g_free (data);
157
158 out:
159 close_res = g_input_stream_close (in, NULL, &error);
160 if (!close_res)
161 {
162 char *uri = g_file_get_uri (file);
163
164 /* Translators: the first %s is the program name, the second one
165 * is the URI of the file, the third is the error message.
166 */
167 g_printerr (_("%s: %s: error closing: %s\n"),
168 g_get_prgname (), uri, error->message);
169 g_clear_error (&error);
170 g_free (uri);
171 res = FALSE;
172 }
173
174 g_object_unref (in);
175
176 if (fd != STDOUT_FILENO)
177 g_close (fd, NULL);
178
179 return res;
180 }
181
182 int
main(int argc,char * argv[])183 main (int argc,
184 char *argv[])
185 {
186 GOptionContext *context = NULL;
187 GError *error = NULL;
188 const char *description;
189 const char *summary;
190 JsonParser *parser;
191 JsonGenerator *generator;
192 gboolean res;
193 int i;
194
195 setlocale (LC_ALL, "");
196
197 bindtextdomain (GETTEXT_PACKAGE, JSON_LOCALEDIR);
198 bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
199 textdomain (GETTEXT_PACKAGE);
200
201 /* Translators: this message will appear after the usage string */
202 /* and before the list of options. */
203 summary = _("Format JSON files.");
204 description = _("json-glib-format formats JSON resources.");
205
206 context = g_option_context_new (NULL);
207 g_option_context_set_summary (context, summary);
208 g_option_context_set_description (context, description);
209 g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
210 g_option_context_parse (context, &argc, &argv, &error);
211 g_option_context_free (context);
212
213 if (error != NULL)
214 {
215 /* Translators: the %s is the program name. This error message
216 * means the user is calling json-glib-validate without any
217 * argument.
218 */
219 g_printerr (_("Error parsing commandline options: %s\n"), error->message);
220 g_printerr ("\n");
221 g_printerr (_("Try “%s --help” for more information."), g_get_prgname ());
222 g_printerr ("\n");
223 g_error_free (error);
224 return 1;
225 }
226
227 if (files == NULL)
228 {
229 /* Translators: the %s is the program name. This error message
230 * means the user is calling json-glib-validate without any
231 * argument.
232 */
233 g_printerr (_("%s: missing files"), g_get_prgname ());
234 g_printerr ("\n");
235 g_printerr (_("Try “%s --help” for more information."), g_get_prgname ());
236 g_printerr ("\n");
237 return 1;
238 }
239
240 generator = json_generator_new ();
241 json_generator_set_pretty (generator, prettify);
242 json_generator_set_indent (generator, indent_spaces);
243
244 parser = json_parser_new ();
245 res = TRUE;
246 i = 0;
247
248 do
249 {
250 GFile *file = g_file_new_for_commandline_arg (files[i]);
251
252 res = format (parser, generator, file) && res;
253 g_object_unref (file);
254 }
255 while (files[++i] != NULL);
256
257 g_object_unref (parser);
258 g_object_unref (generator);
259
260 return res ? EXIT_SUCCESS : EXIT_FAILURE;
261 }
262