[qa] Added commit check and updated travis

Fixed openwisp#20

.travis.yml

@@ -41,4 +41,5 @@ script:
   - coverage run --source=openwisp_utils runtests.py
 
 after_success:
-  coveralls
+  - coveralls
+  - python commitCheck.py $TRAVIS_REPO_SLUG $TRAVIS_COMMIT

commitCheck.py

@@ -0,0 +1,96 @@
+import os
+import re
+import sys
+
+import requests
+
+# Get Repo and Commit Sha
+repo = sys.argv[1]
+commit = sys.argv[2]
+
+
+# Function converter from php to python
+def mb_substr(s, start, length=None):
+    return (s[start:(start + length)])
+
+
+# Get Github token
+github_token = os.environ["GH_TOKEN"]
+
+# Api URL and commit url
+api = "https://api.github.com"
+api_main_url = "/repos/" + repo + "/commits/" + commit
+
+res = requests.get(api + api_main_url)
+api_body = res.json()
+
+# Get commit username
+api_username = api_body['author']['login']
+# Get message commit
+api_message = api_body['commit']['message']
+# Explode commit message
+api_message_explode = api_message.split("\n")
+# Count Api Message when exploded
+api_message_explode_count = len(api_message_explode)
+
+errors = []
+
+# Check dot in end of the first line
+if api_message_explode[0][len(api_message_explode[0].strip()) - 1].strip() == '.':
+    errors.append("Do not add a final dot at the end of the first line.")
+
+# Check prefix
+prefix = re.match('\[(.*?)\]', api_message_explode[0])
+
+if not prefix:
+    errors.append(
+        "Add prefix in beginning of the commit. Example: [module/file/feature]"
+    )
+
+# Check capital after prefix
+commitMessagefirst = api_message_explode[0].replace(prefix.group(), '').strip()
+if not commitMessagefirst[0].isupper():
+    errors.append("No capital letter after prefix")
+
+# Check blank page before first line and second line
+if api_message_explode_count > 1:
+    print(api_message_explode[1])
+    if api_message_explode[1] != '':
+        errors.append("No blank line before first line and second line")
+
+# Check is error
+if len(errors) == 0:
+    body = "All check done, no errors."
+else:
+    body = "You have errors with commit message: \n"
+    for e in errors:
+        body += "- " + e + "\n"
+
+search = requests.get(
+    api +
+    '/search/issues?q=typetype:pr%20sha:' +
+    mb_substr(commit, 0, 7) +
+    '%20is_unmerged%20author:' +
+    api_username +
+    '&&sort=updated'
+)
+search_body = search.json()
+
+
+if len(search_body['items']) > 0:
+    search_data = search_body['items'][0]['number']
+    response_url = (
+        "/repos/" + str(repo) +
+        "/issues/" + str(search_data) + "/comments")
+
+    headers = {
+        'Authorization': 'token %s' % github_token
+    }
+    post_fields = {
+        'body': body
+    }
+    review = requests.post(
+        api +
+        response_url,
+        json=post_fields,
+        headers=headers)