#N/A: Add ifconfig_device_not_found rule

README.md

@@ -199,6 +199,7 @@ using the matched rule and runs it. Rules enabled by default are as follows:
 * `has_exists_script` – prepends `./` when script/binary exists;
 * `heroku_not_command` – fixes wrong `heroku` commands like `heroku log`;
 * `history` – tries to replace command with most similar command from history;
+* `ifconfig_device_not_found` – fixes wrong device names like `wlan0` to `wlp2s0`;
 * `java` – removes `.java` extension when running Java programs;
 * `javac` – appends missing `.java` when compiling Java files;
 * `lein_not_task` – fixes wrong `lein` tasks like `lein rpl`;

tests/rules/test_ifconfig_device_not_found.py

@@ -0,0 +1,53 @@
+import pytest
+from six import BytesIO
+from thefuck.rules.ifconfig_device_not_found import match, get_new_command
+from tests.utils import Command
+
+
+stderr = '{}: error fetching interface information: Device not found'
+
+stdout = b'''
+wlp2s0    Link encap:Ethernet  HWaddr 5c:51:4f:7c:58:5d
+          inet addr:192.168.0.103  Bcast:192.168.0.255  Mask:255.255.255.0
+          inet6 addr: fe80::be23:69b9:96d2:6d39/64 Scope:Link
+          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
+          RX packets:23581604 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:17017655 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:1000
+          RX bytes:16148429061 (16.1 GB)  TX bytes:7067533695 (7.0 GB)
+'''
+
+
+@pytest.fixture(autouse=True)
+def ifconfig(mocker):
+    mock = mocker.patch(
+        'thefuck.rules.ifconfig_device_not_found.subprocess.Popen')
+    mock.return_value.stdout = BytesIO(stdout)
+    return mock
+
+
+@pytest.mark.parametrize('script, stderr', [
+    ('ifconfig wlan0', stderr.format('wlan0')),
+    ('ifconfig -s eth0', stderr.format('eth0')),
+])
+def test_match(script, stderr):
+    assert match(Command(script, stderr=stderr))
+
+
+@pytest.mark.parametrize('script, stderr', [
+    ('config wlan0',
+     'wlan0: error fetching interface information: Device not found'),
+    ('ifconfig eth0', ''),
+])
+def test_not_match(script, stderr):
+    assert not match(Command(script, stderr=stderr))
+
+
+@pytest.mark.parametrize('script, result', [
+    ('ifconfig wlan0', ['ifconfig wlp2s0']),
+    ('ifconfig -s wlan0', ['ifconfig -s wlp2s0']),
+])
+def test_get_new_comman(script, result):
+    new_command = get_new_command(
+        Command(script, stderr=stderr.format('wlan0')))
+    assert new_command == result

thefuck/rules/ifconfig_device_not_found.py

@@ -0,0 +1,25 @@
+import subprocess
+from thefuck.utils import for_app, replace_command, eager
+import sys
+
+@for_app('ifconfig')
+def match(command):
+    return 'error fetching interface information: Device not found' \
+           in command.stderr
+
+
+@eager
+def _get_possible_interfaces():
+    proc = subprocess.Popen(['ifconfig', '-a'], stdout=subprocess.PIPE)
+    for line in proc.stdout.readlines():
+        line = line.decode()
+        if line and line != '\n' and not line.startswith(' '):
+            yield line.split(' ')[0]
+
+
+def get_new_command(command):
+    interface = command.stderr.split(' ')[0][:-1]
+    possible_interfaces = _get_possible_interfaces()
+    return replace_command(command, interface, possible_interfaces)
+
+