Merge lp:~cypressyew/checkbox/fix-missing-optical-resource into lp:checkbox

[Po-Hsu Lin]

I am not sure if I did this right :P
But it works with this file in plainbox-resources/bin

[Zygmunt Krynicki (zyga)]

This is probably okay but IIRC we have a number of optical-resource-like scripts now and before we merge this one in I'd like to ensure that we don't have responsibility duplicates (separate tools that effectively try to do the same thing).

Thanks

review: Needs Information

[Sylvain Pineau (sylvain-pineau)]

We removed the previous resource job/scripts that used wodim to guess the capabilities of a drive. The only script that we need is the one that was left in checkbox-legacy.

So +1 sor resurecting the missing one.

review: Approve

=== added file 'providers/plainbox-provider-resource-generic/bin/optical_resource'
--- providers/plainbox-provider-resource-generic/bin/optical_resource	1970-01-01 00:00:00 +0000
+++ providers/plainbox-provider-resource-generic/bin/optical_resource	2014-07-04 07:23:58 +0000
@@ -0,0 +1,80 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+#
+# color_depth_info
+#
+# This file is part of Checkbox.
+#
+# Copyright 2014 Canonical Ltd.
+#
+# Authors: Brendan Donegan <[e-mail]>
+#
+# Checkbox is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3,
+# as published by the Free Software Foundation.
+
+#
+# Checkbox 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 Checkbox.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+This script discovers the types of media supported by a named optical drive
+and the capabilities available for that media. It uses the information
+provided by udev for this purpose. Currently supported media types and
+capabilities are:
+
+* CD
+  * Read
+  * Write
+  * Rewrite
+* DVD
+  * Read
+  * Write
+  * Rewrite
+* Blu-Ray (BD)
+  * Read
+  * Write
+  * Rewrite
+"""
+
+import sys
+
+from argparse import ArgumentParser
+from collections import OrderedDict
+from subprocess import check_output, CalledProcessError
+
+CAP_MAP = OrderedDict([('ID_CDROM_CD=1', 'cd_read'),
+                       ('ID_CDROM_CD_R=1', 'cd_write'),
+                       ('ID_CDROM_CD_RW=1', 'cd_rewrite'),
+                       ('ID_CDROM_DVD=1', 'dvd_read'),
+                       ('ID_CDROM_DVD_R=1', 'dvd_write'),
+                       ('ID_CDROM_DVD_RW=1', 'dvd_rewrite'),
+                       ('ID_CDROM_BD=1', 'bd_read'),
+                       ('ID_CDROM_BD_R=1', 'bd_write'),
+                       ('ID_CDROM_BD_RE=1', 'bd_rewrite')])
+
+
+def main():
+    parser = ArgumentParser("Shows which capabilities are supported "
+                            "by the specified optical device.")
+    parser.add_argument("device",
+                        help="The optical device to get capabilities for")
+    args = parser.parse_args()
+
+    try:
+        cdrom_id = check_output(['/lib/udev/cdrom_id', args.device],
+                                universal_newlines=True).split('\n')
+    except CalledProcessError:
+        return 1
+    if cdrom_id:
+        for cap in CAP_MAP:
+            if cap in cdrom_id:
+                print(CAP_MAP[cap] + ": supported")
+
+if __name__ == "__main__":
+    sys.exit(main())