lcd: T2564: flatten CLI interface

* set system lcd device <device>
* set system lcd model <modeml>

Both device and model have completion helpers for supported interfaces and LCD
displays.

3 files changed, 85 insertions, 109 deletions

diff --git a/src/conf_mode/interfaces-wirelessmodem.py b/src/conf_mode/interfaces-wirelessmodem.py
index 4081be3c9..6d168d918 100755
--- a/src/conf_mode/interfaces-wirelessmodem.py
+++ b/src/conf_mode/interfaces-wirelessmodem.py
@@ -16,7 +16,6 @@
 
 import os
 
-from fnmatch import fnmatch
 from sys import exit
 
 from vyos.config import Config
@@ -25,22 +24,13 @@ from vyos.configverify import verify_vrf
 from vyos.template import render
 from vyos.util import call
 from vyos.util import check_kmod
+from vyos.util import find_device_file
 from vyos import ConfigError
 from vyos import airbag
 airbag.enable()
 
 k_mod = ['option', 'usb_wwan', 'usbserial']
 
-def find_device_file(device):
-    """ Recurively search /dev for the given device file and return its full path.
-        If no device file was found 'None' is returned """
-    for root, dirs, files in os.walk('/dev'):
-        for basename in files:
-            if fnmatch(basename, device):
-                return os.path.join(root, basename)
-
-    return None
-
 def get_config():
     """
     Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
diff --git a/src/conf_mode/system-display.py b/src/conf_mode/system-display.py
deleted file mode 100755
index 3eafc30c0..000000000
--- a/src/conf_mode/system-display.py
+++ /dev/null
@@ -1,98 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2020 Francois Mertz fireboxled at gmail.com
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2 or later as
-# published by the Free Software Foundation.
-#
-# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
-
-import os
-
-from sys import exit
-
-from vyos.config import Config
-from vyos import ConfigError
-from vyos.util import run
-from vyos.template import render
-
-from vyos import airbag
-airbag.enable()
-
-def get_config():
-    conf = Config()
-    base = ['system', 'display']
-    display = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
-    # Return a (possibly empty) configuration dictionary
-    return display
-
-def verify(config_dict):
-    if not config_dict:
-        return None
-
-    if 'model' not in config_dict:
-        raise ConfigError('Display model is [REQUIRED]')
-
-    if (           'show' not in config_dict
-        or (      'clock' not in config_dict['show']
-            and 'network' not in config_dict['show']
-            and    'host' not in config_dict['show']
-           )
-       ):
-        raise ConfigError('Display show must have a clock, host or network')
-
-    if (      'network'     in config_dict['show']
-        and 'interface' not in config_dict['show']['network']
-       ):
-        raise ConfigError('Display show network must have an interface')
-
-    if (      'network' in config_dict['show']
-        and 'interface' in config_dict['show']['network']
-        and len(config_dict['show']['network']['interface']) > 3
-       ):
-        raise ConfigError('Display show network cannot have > 3 interfaces')
-
-    return None
-
-def generate(config_dict):
-    if not config_dict:
-        return None
-    # Render config file for daemon LCDd
-    render('/run/LCDd/LCDd.lo.conf', 'system-display/LCDd.conf.tmpl', config_dict)
-    # Render config file for client lcdproc
-    render('/run/lcdproc/lcdproc.lo.conf', 'system-display/lcdproc.conf.tmpl', config_dict)
-
-    return None
-
-def apply(config_dict):
-    # Stop client
-    run('systemctl stop lcdproc@lo.service')
-
-    if not config_dict or 'disabled' in config_dict:
-        # Stop server
-        run('systemctl stop LCDd@lo.service')
-        return None
-
-    # Restart server
-    run('systemctl restart LCDd@lo.service')
-    # Start client
-    run('systemctl start lcdproc@lo.service')
-
-    return None
-
-if __name__ == '__main__':
-    try:
-        config_dict = get_config()
-        verify(config_dict)
-        generate(config_dict)
-        apply(config_dict)
-    except ConfigError as e:
-        print(e)
-        exit(1)
diff --git a/src/conf_mode/system_lcd.py b/src/conf_mode/system_lcd.py
new file mode 100755
index 000000000..0ad1318f0
--- /dev/null
+++ b/src/conf_mode/system_lcd.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+#
+# Copyright 2020 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+from sys import exit
+
+from vyos.config import Config
+from vyos.util import call
+from vyos.util import find_device_file
+from vyos.template import render
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+lcdd_conf = '/run/LCDd/LCDd.conf'
+lcdproc_conf = '/run/lcdproc/lcdproc.conf'
+
+def get_config():
+    conf = Config()
+    base = ['system', 'lcd']
+    lcd = conf.get_config_dict(base, key_mangling=('-', '_'),
+                               get_first_key=True)
+    # Return (possibly empty) dictionary
+    return lcd
+
+def verify(lcd):
+    if not lcd:
+        return None
+
+    if not {'device', 'model'} <= set(lcd):
+        raise ConfigError('Both device and driver must be set!')
+
+    return None
+
+def generate(lcd):
+    if not lcd:
+        return None
+
+    if 'device' in lcd:
+        lcd['device'] = find_device_file(lcd['device'])
+
+    # Render config file for daemon LCDd
+    render(lcdd_conf, 'lcd/LCDd.conf.tmpl', lcd, trim_blocks=True)
+    # Render config file for client lcdproc
+    render(lcdproc_conf, 'lcd/lcdproc.conf.tmpl', lcd, trim_blocks=True)
+
+    return None
+
+def apply(lcd):
+    if not lcd:
+        call('systemctl stop lcdproc.service LCDd.service')
+
+        for file in [lcdd_conf, lcdproc_conf]:
+            if os.path.exists(file):
+                os.remove(file)
+    else:
+        # Restart server
+        call('systemctl restart LCDd.service lcdproc.service')
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        config_dict = get_config()
+        verify(config_dict)
+        generate(config_dict)
+        apply(config_dict)
+    except ConfigError as e:
+        print(e)
+        exit(1)