added gmail module to polybar

.config/polybar/gmail/README.md

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+# Gmail Notifications
+![image](https://user-images.githubusercontent.com/36492651/44306373-08f5ea00-a3a7-11e8-9347-8a84bcb4efab.png)
+
+I use [Polybar](https://github.com/jaagr/polybar) and use this repo as module to it for getting notified about my gmail.
+
+## Installation
+
+```
+git clone https://github.com/SyfiMalik/gmail-notifications.git ~/.config/polybar/ 
+mv ~/.config/polybar/gmail-notifications ~/.config/polybar/gmail
+cd ~/.config/polybar/gmail
+./run.py
+```
+
+You'll be prompted to login to your gmail, login there, allow gmail4polybar and you'll be given a code to enter in the terminal. Enter the code and you're good to go. Now follow below steps to recieve gmail notifications in the tray.
+
+Add these lines to your polybar main config.
+
+```ini
+[module/gmail]
+type = custom/script
+exec = ~/.config/polybar/gmail/launch.py
+tail = true
+click-left = xdg-open https://mail.google.com
+```
+
+and yeah, don't forget to enable 'gmail' module. 

.config/polybar/gmail/auth.py

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+#!/usr/bin/env python
+
+import pathlib
+import os
+import webbrowser
+import httplib2
+from oauth2client import client, file
+
+target = 'https://www.googleapis.com/auth/gmail.readonly'
+redirect_uri = 'urn:ietf:wg:oauth:2.0:oob'
+dir = os.path.dirname(os.path.realpath(__file__))
+secrets = os.path.join(dir, 'secrets.json')
+credentials = os.path.join(dir, 'mycredentials.json')
+storage = file.Storage(credentials)
+
+if pathlib.Path(credentials).is_file():
+    credentials = storage.get()
+    credentials.refresh(httplib2.Http())
+    print("credentials refreshed")
+else:
+    flow = client.flow_from_clientsecrets(secrets, scope=target,redirect_uri=redirect_uri)
+    auth_uri = flow.step1_get_authorize_url()
+    webbrowser.open(auth_uri)
+    auth_code = input('Enter the auth code: ')
+    credentials = flow.step2_exchange(auth_code)
+    storage.put(credentials)
+    print('Credentials created')
+

.config/polybar/gmail/launch.py

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+#!/usr/bin/env python
+
+import subprocess, os
+
+s = subprocess.check_output("nmcli networking connectivity check", shell=True)
+
+if b'full' in s:
+    os.system('~/.config/polybar/gmail/run.py')
+if b'limited' in s:
+    print('')
+

.config/polybar/gmail/run.py

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+#!/usr/bin/env python
+
+import os
+import subprocess
+import argparse
+import time
+import pathlib
+from apiclient import discovery, errors
+from httplib2 import ServerNotFoundError
+from oauth2client import client, file
+
+parser = argparse.ArgumentParser()
+parser.add_argument('-b', '--badge', default='\uf0e0')
+parser.add_argument('-c', '--color', default='#ff69b4')
+parser.add_argument('-m', '--mute', action='store_true')
+args = parser.parse_args()
+
+dir = os.path.dirname(os.path.realpath(__file__))
+credentials = os.path.join(dir, 'mycredentials.json')
+unread_badge = '%{F' + args.color + '}' + args.badge + ' %{F-}'
+error_badge = '%{F' + args.color + '}\uf06a %{F-}'
+count_was = 0
+
+def update(count_was):
+    gmail = discovery.build('gmail', 'v1', credentials=file.Storage(credentials).get())
+    labels = gmail.users().labels().get(userId='me', id='INBOX').execute()
+    count = labels['messagesUnread']
+    if count > 0:
+        print(unread_badge + str(count), flush=True)
+    else:
+        print(args.badge, flush=True)
+    if not args.mute and count_was < count and count > 0:
+        subprocess.run(['canberra-gtk-play', '-f', '/home/z/bin/music4scripts/tora-yara.ogg'])
+    return count
+
+while True:
+    try:
+        if pathlib.Path(credentials).is_file():
+            count_was = update(count_was)
+            time.sleep(10)
+        else:
+            print(error_badge + 'credentials not found', flush=True)
+            time.sleep(2)
+    except (errors.HttpError, ServerNotFoundError, OSError) as error:
+        print(error_badge + str(error), flush=True)
+        time.sleep(5)
+    except client.AccessTokenRefreshError:
+        print(error_badge + 'revoked credentials', flush=True)
+        time.sleep(5)
+
+
+

.config/polybar/gmail/secrets.json

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+{
+  "installed": {
+    "client_id": "1066219363266-ghk8nofj3vkupjqcl2bjpku4e6khdpbl.apps.googleusercontent.com",
+    "project_id": "gmail4polybar",
+    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
+    "token_uri": "https://accounts.google.com/o/oauth2/token",
+    "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
+    "client_secret": "2I-MLoVvR5f6jIErK8Y6aNl0",
+    "redirect_uris": ["urn:ietf:wg:oauth:2.0:oob"]
+  }
+}