Check targets (#3019)

* Add extra sanity test to check aliases files.

* Remove invalid target name.

tests/integration/targets/mqtt/aliases

@@ -1,4 +1,3 @@
-notification/mqtt
 shippable/posix/group1
 skip/aix
 skip/osx

tests/sanity/extra/aliases.json

@@ -0,0 +1,11 @@
+{
+    "include_symlinks": false,
+    "prefixes": [
+        ".azure-pipelines/azure-pipelines.yml",
+        "tests/integration/targets/"
+    ],
+    "output": "path-message",
+    "requirements": [
+        "PyYAML"
+    ]
+}

tests/sanity/extra/aliases.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+"""Check extra collection docs with antsibull-lint."""
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+import sys
+
+import yaml
+
+
+def main():
+    """Main entry point."""
+    paths = sys.argv[1:] or sys.stdin.read().splitlines()
+    paths = [path for path in paths if path.endswith('/aliases')]
+
+    with open('.azure-pipelines/azure-pipelines.yml', 'rb') as f:
+        azp = yaml.safe_load(f)
+
+    allowed_targets = set(['shippable/cloud/group1'])
+    for stage in azp['stages']:
+        if stage['stage'].startswith(('Sanity', 'Unit', 'Cloud', 'Summary')):
+            continue
+        for job in stage['jobs']:
+            for group in job['parameters']['groups']:
+                allowed_targets.add('shippable/posix/group{0}'.format(group))
+
+    for path in paths:
+        targets = []
+        skip = False
+        with open(path, 'r') as f:
+            for line in f:
+                if '#' in line:
+                    line = line[:line.find('#')]
+                line = line.strip()
+                if line.startswith('needs/'):
+                    continue
+                if line.startswith('skip/'):
+                    continue
+                if line.startswith('cloud/'):
+                    continue
+                if line in ('unsupported', 'disabled', 'hidden'):
+                    skip = True
+                if line in ('destructive', ):
+                    continue
+                if '/' not in line:
+                    continue
+                targets.append(line)
+        if skip:
+            continue
+        if not targets:
+            if 'targets/setup_' in path:
+                continue
+            print('%s: %s' % (path, 'found no targets'))
+        for target in targets:
+            if target not in allowed_targets:
+                print('%s: %s' % (path, 'found invalid target "{0}"'.format(target)))
+
+
+if __name__ == '__main__':
+    main()